The document provides an overview of developing database applications using ADO.NET and XML. It discusses the ADO.NET object model which includes data providers and datasets. Data providers are used to connect to databases and retrieve data to fill datasets. Connections, commands, data readers and data adapters are the key components of data providers. The document also covers creating and managing connections, executing SQL statements, and handling connection events and pooling.
The document discusses working with data adapters in ADO.NET. It explains that a data adapter retrieves data from a database into a dataset and then updates the database. Different types of data adapters like SqlDataAdapter can be used depending on the database. The data adapter uses properties like SelectCommand and methods like Fill() to transfer data between the database and dataset. It also addresses resolving concurrency issues and improving performance through batch updates.
The document discusses working with datasets and datatables in a disconnected environment in ADO.NET. It describes how datasets store and manipulate data disconnected from the database, and how they contain datatables which in turn contain columns and rows of data. It also discusses typed and untyped datasets, relationships between tables, and using dataviews to filter and sort data in a datatable.
This document discusses data binding and navigating records in database applications using ADO.NET and XML. It describes implementing simple and complex data binding to display data on Windows form controls from a data source. It also explains using the BindingNavigator control to navigate between records in the data source and interact with the records. Key steps include binding control properties like Text to columns in the data source and using controls in the BindingNavigator to move between records.
The document discusses connected and disconnected environments in ADO.NET. A connected environment maintains a constant connection to the data source, while a disconnected environment does not directly connect. It also covers synchronous and asynchronous operations using command objects, and how asynchronous commands can improve performance by executing in parallel. Methods like BeginExecuteReader() and EndExecuteReader() are used for asynchronous retrieval and completion of data.
This document discusses managing transactions in ADO.NET. It covers local transactions which operate on a single data source and distributed transactions which operate on multiple data sources. It describes the properties of transactions, types of transactions classes in ADO.NET, and how to perform and commit local and distributed transactions programmatically using methods like BeginTransaction(), Complete(), and Commit(). It also discusses transaction isolation levels and how to specify them.
The document provides an overview of ADO.NET objects used to interact with databases, including the SqlConnection object used to connect to databases, the SqlCommand object used to execute queries and commands, and the SqlDataReader object used to read query results. It also introduces the DataSet object for caching data in memory and the SqlDataAdapter object for loading and writing data between a database and the in-memory DataSet.
The document discusses ADO.NET, which is a model used by .NET applications to communicate with a database. It identifies the key components of ADO.NET, including the data provider, dataset, connection, data adapter, and data command. The data adapter transfers data between a database and dataset using commands like Select, Insert, Update and Delete. It also discusses how to connect to a database by creating a data adapter and accessing the database through a dataset.
The document provides an overview of ADO.NET and its core classes:
- ADO.NET uses datasets to store data from a database in memory and data provider objects like connections, commands, and data adapters to retrieve and update data in the database.
- The .NET Framework includes the SQL Server and OLE DB data providers, which provide classes like SqlConnection and OleDbConnection to connect to databases.
- Core classes like SqlCommand represent SQL statements, and SqlDataAdapter links commands and connections to datasets to load and save data.
The document discusses working with data adapters in ADO.NET. It explains that a data adapter retrieves data from a database into a dataset and then updates the database. Different types of data adapters like SqlDataAdapter can be used depending on the database. The data adapter uses properties like SelectCommand and methods like Fill() to transfer data between the database and dataset. It also addresses resolving concurrency issues and improving performance through batch updates.
The document discusses working with datasets and datatables in a disconnected environment in ADO.NET. It describes how datasets store and manipulate data disconnected from the database, and how they contain datatables which in turn contain columns and rows of data. It also discusses typed and untyped datasets, relationships between tables, and using dataviews to filter and sort data in a datatable.
This document discusses data binding and navigating records in database applications using ADO.NET and XML. It describes implementing simple and complex data binding to display data on Windows form controls from a data source. It also explains using the BindingNavigator control to navigate between records in the data source and interact with the records. Key steps include binding control properties like Text to columns in the data source and using controls in the BindingNavigator to move between records.
The document discusses connected and disconnected environments in ADO.NET. A connected environment maintains a constant connection to the data source, while a disconnected environment does not directly connect. It also covers synchronous and asynchronous operations using command objects, and how asynchronous commands can improve performance by executing in parallel. Methods like BeginExecuteReader() and EndExecuteReader() are used for asynchronous retrieval and completion of data.
This document discusses managing transactions in ADO.NET. It covers local transactions which operate on a single data source and distributed transactions which operate on multiple data sources. It describes the properties of transactions, types of transactions classes in ADO.NET, and how to perform and commit local and distributed transactions programmatically using methods like BeginTransaction(), Complete(), and Commit(). It also discusses transaction isolation levels and how to specify them.
The document provides an overview of ADO.NET objects used to interact with databases, including the SqlConnection object used to connect to databases, the SqlCommand object used to execute queries and commands, and the SqlDataReader object used to read query results. It also introduces the DataSet object for caching data in memory and the SqlDataAdapter object for loading and writing data between a database and the in-memory DataSet.
The document discusses ADO.NET, which is a model used by .NET applications to communicate with a database. It identifies the key components of ADO.NET, including the data provider, dataset, connection, data adapter, and data command. The data adapter transfers data between a database and dataset using commands like Select, Insert, Update and Delete. It also discusses how to connect to a database by creating a data adapter and accessing the database through a dataset.
The document provides an overview of ADO.NET and its core classes:
- ADO.NET uses datasets to store data from a database in memory and data provider objects like connections, commands, and data adapters to retrieve and update data in the database.
- The .NET Framework includes the SQL Server and OLE DB data providers, which provide classes like SqlConnection and OleDbConnection to connect to databases.
- Core classes like SqlCommand represent SQL statements, and SqlDataAdapter links commands and connections to datasets to load and save data.
This document provides a summary of a session on SQL Server security and authentication using ADO.NET. The session discusses SQL Server authentication modes including Windows authentication and SQL Server authentication. It demonstrates how to programmatically manage SQL Server logins, roles, and permissions from VB.NET. The document also covers application security techniques using views, stored procedures and SQL Server application roles to restrict database access.
Ado.net & data persistence frameworksLuis Goldster
The document discusses serialization, ADO.NET, data tier approaches, and persistence frameworks. Serialization allows persisting an object's state to storage and recreating it later. ADO.NET provides classes for connecting to and interacting with databases. Common data tier approaches include presenting data directly to the presentation layer, adding a business logic layer, or adding a service layer between business logic and data access. Persistence frameworks aim to simplify data access by encapsulating object persistence behaviors like reading, writing, and deleting objects from storage.
ADO.NET is a set of classes that allows .NET applications to access data from databases. It includes classes for connecting to databases, executing commands, retrieving data, and updating data. The key classes are Connection, Command, DataSet, DataAdapter, and DataReader. ADO.NET uses a disconnected model where data is retrieved into a DataSet object using a DataAdapter and then disconnected from the database. This allows for improved scalability and performance compared to older data access methods.
The document provides an introduction to ADO.NET architecture, including its benefits and core concepts. It discusses key ADO.NET objects like Connection, Command, DataReader, DataSet and DataAdapter. It explains how these objects are used to connect to databases, execute queries, retrieve and manage data in memory, and update data sources.
This document discusses ADO.NET, which is a data access technology that allows applications to connect to and manipulate data from various sources. It describes the core ADO.NET objects like Connection, Command, DataReader, DataAdapter, DataSet and DataTable. It also explains the differences between connected and disconnected data access models in ADO.NET, detailing the objects used in each approach and their advantages. Finally, it provides an overview of commonly used .NET data providers like SqlClient, OleDb and Odbc.
This chapter covers programming with data in databases using ADO.NET. It discusses accessing and modifying database data declaratively using data source controls or programmatically using ADO.NET classes like DbConnection, DbCommand, and DbDataReader. It also covers filling DataSet objects with data from databases using DbDataAdapter and executing transactions across multiple databases.
The document discusses several differences between ADO.NET concepts including:
1) DataReader allows reading one record at a time in a forward-only manner while DataAdapter allows navigating records and updating data in a disconnected manner.
2) DataSet allows caching and manipulating disconnected data across multiple tables while DataReader requires an open connection and only retrieves data from a single query.
3) DataSet.Copy() copies both structure and data of a DataSet while DataSet.Clone() only copies the structure without any data.
4) ADO.NET uses XML, disconnected architecture, and the DataSet object while classic ADO uses binary format, requires active connections, and the Recordset object.
ADO.NET by ASP.NET Development Company in india
ADO.NET is a data access technology from the Microsoft .NET Framework that provides communication between relational and non-relational systems through a common set of components.
Video :
Courtesy:
http://www.ifourtechnolab.com
ADO.NET is a data access technology that allows applications to connect to and manipulate data from various data sources. It provides a common object model for data access that can be used across different database systems through data providers. The core objects in ADO.NET include the Connection, Command, DataReader, DataAdapter and DataSet. Data can be accessed in ADO.NET using either a connected or disconnected model. The disconnected model uses a DataSet to cache data locally, while the connected model directly executes commands against an open connection.
The document provides an overview of ADO.NET, which is Microsoft's data access technology for .NET applications to connect to and manipulate data in various data stores. It discusses key ADO.NET concepts like connections, commands, data readers, data adapters, datasets and how they are used to work with different data providers like SQL Server, OLE DB, and ODBC. It also covers data binding using data grids and filtering data views.
The document discusses data access in .NET applications. It describes how earlier models like DAO and ADO had issues around performance and connectivity. ADO.NET improved on ADO by using a disconnected data access model where connections are opened briefly to perform operations then closed. ADO.NET relies on datasets, which hold in-memory representations of data, and data providers like SQL Client that maintain connections to databases.
This document provides an overview of ADO.NET components including data providers, datasets, datatables, connections, commands, parameters, dataadapters, and datareaders. It discusses the architecture of ADO.NET and the roles and properties of key classes. The data provider, connection, and command classes are described in detail along with examples of how to establish a connection and execute commands against a database.
This document discusses files and streams in .NET framework 4.5. It covers navigating the file system using classes like FileInfo, DirectoryInfo, and DriveInfo. It also discusses reading and writing files using streams, including FileStream for binary data and StreamReader/StreamWriter for text. Key points covered include getting information on files and directories, creating/deleting files and folders, and reading/writing files using streams in a simple way compared to FileStream.
Disconnected Architecture and Crystal report in VB.NETEverywhere
This document discusses disconnected architecture in ADO.NET. It explains that ADO.NET uses a dataset object to enable disconnected data access through filling the dataset using a data adapter. The dataset acts as an in-memory cache of data and does not interact directly with the data source. Data tables within the dataset contain rows and columns of data. The data adapter acts as a bridge between the dataset and data source, using commands to fill the dataset from a query and update changes back to the source. Stored procedures can also be used to encapsulate database operations when working with a dataset in a disconnected manner.
The document discusses ADO.NET programming and concepts such as:
- ADO.NET architecture and its main components - data providers and DataSet
- Connected and disconnected data access architectures supported by ADO.NET
- Common ADO.NET objects like Connection, Command, DataReader and DataAdapter and how they are used to execute queries, read and manipulate data
- The DataSet object which acts as an in-memory representation of data and enables disconnected data access
- Binding DataGrid control to a DataSet to display retrieved data
The document discusses ADO.NET and working with datasets and data adapters in a disconnected model. It provides an introduction to ADO.NET and how it allows connecting application UIs to data sources. It describes dealing with databases using connected and disconnected models and the ADO.NET data architecture. It explains how to work with datasets as in-memory representations of data with tables, columns, rows and relations. It discusses using a data adapter to populate a dataset from a data source using Fill() and update the data source from the dataset using Update().
This document provides an overview of ADO.NET and how to access relational data using it in Microsoft Visual Studio .NET. It covers key ADO.NET concepts like the object model, DataSets, and DataAdapters. It also demonstrates how to connect to a database, generate and populate a DataSet, and display dataset data in list-bound controls like a DataGrid. The document includes lessons, demonstrations, and a practice activity on these topics.
This document discusses data representation in C# and ADO.NET. It begins by explaining that C# objects are similar to Java objects but with properties instead of getter/setter methods. It then covers how to create a class with properties in C# and use objects. The document also discusses encapsulation in ADO.NET and how it handles connecting to databases. It provides steps for connecting to a database, creating a data adapter and dataset, binding controls to display data, and adding code to populate the dataset and allow navigation between records.
With help of this small Proof of Concept, I have tried to demonstrate the usage of Neo4J (Graph DB) as a metastore for a Data Lake or a DW. Graph DBs can store highly relational data and help us in doing data discovery and impact analysis, which bit more complex to bee done in an RDBMS.
This document provides an overview of relational database programming using ADO.NET. It discusses relational database systems and SQL, connecting applications to databases, using database objects like commands and readers, and executing statements. Key topics covered include relational models, SQL, database constraints, ADO.NET providers and objects, parameterized commands, and transactions.
This document discusses working with ADO.NET. It identifies the key components of ADO.NET, including data providers, data adapters, datasets, and data commands. It explains that ADO.NET uses a disconnected data architecture with data cached in datasets. It also compares typed and untyped datasets.
This document provides an overview of accessing relational data using Microsoft Visual Studio .NET and ADO.NET. It discusses what .NET and ADO.NET are, the history and evolution of ADO.NET, the core ADO.NET object model including DataSets, DataAdapters, and list-bound controls. It also provides an example of using ADO.NET with SQL Server to populate and display data in a datagrid.
This document provides a summary of a session on SQL Server security and authentication using ADO.NET. The session discusses SQL Server authentication modes including Windows authentication and SQL Server authentication. It demonstrates how to programmatically manage SQL Server logins, roles, and permissions from VB.NET. The document also covers application security techniques using views, stored procedures and SQL Server application roles to restrict database access.
Ado.net & data persistence frameworksLuis Goldster
The document discusses serialization, ADO.NET, data tier approaches, and persistence frameworks. Serialization allows persisting an object's state to storage and recreating it later. ADO.NET provides classes for connecting to and interacting with databases. Common data tier approaches include presenting data directly to the presentation layer, adding a business logic layer, or adding a service layer between business logic and data access. Persistence frameworks aim to simplify data access by encapsulating object persistence behaviors like reading, writing, and deleting objects from storage.
ADO.NET is a set of classes that allows .NET applications to access data from databases. It includes classes for connecting to databases, executing commands, retrieving data, and updating data. The key classes are Connection, Command, DataSet, DataAdapter, and DataReader. ADO.NET uses a disconnected model where data is retrieved into a DataSet object using a DataAdapter and then disconnected from the database. This allows for improved scalability and performance compared to older data access methods.
The document provides an introduction to ADO.NET architecture, including its benefits and core concepts. It discusses key ADO.NET objects like Connection, Command, DataReader, DataSet and DataAdapter. It explains how these objects are used to connect to databases, execute queries, retrieve and manage data in memory, and update data sources.
This document discusses ADO.NET, which is a data access technology that allows applications to connect to and manipulate data from various sources. It describes the core ADO.NET objects like Connection, Command, DataReader, DataAdapter, DataSet and DataTable. It also explains the differences between connected and disconnected data access models in ADO.NET, detailing the objects used in each approach and their advantages. Finally, it provides an overview of commonly used .NET data providers like SqlClient, OleDb and Odbc.
This chapter covers programming with data in databases using ADO.NET. It discusses accessing and modifying database data declaratively using data source controls or programmatically using ADO.NET classes like DbConnection, DbCommand, and DbDataReader. It also covers filling DataSet objects with data from databases using DbDataAdapter and executing transactions across multiple databases.
The document discusses several differences between ADO.NET concepts including:
1) DataReader allows reading one record at a time in a forward-only manner while DataAdapter allows navigating records and updating data in a disconnected manner.
2) DataSet allows caching and manipulating disconnected data across multiple tables while DataReader requires an open connection and only retrieves data from a single query.
3) DataSet.Copy() copies both structure and data of a DataSet while DataSet.Clone() only copies the structure without any data.
4) ADO.NET uses XML, disconnected architecture, and the DataSet object while classic ADO uses binary format, requires active connections, and the Recordset object.
ADO.NET by ASP.NET Development Company in india
ADO.NET is a data access technology from the Microsoft .NET Framework that provides communication between relational and non-relational systems through a common set of components.
Video :
Courtesy:
http://www.ifourtechnolab.com
ADO.NET is a data access technology that allows applications to connect to and manipulate data from various data sources. It provides a common object model for data access that can be used across different database systems through data providers. The core objects in ADO.NET include the Connection, Command, DataReader, DataAdapter and DataSet. Data can be accessed in ADO.NET using either a connected or disconnected model. The disconnected model uses a DataSet to cache data locally, while the connected model directly executes commands against an open connection.
The document provides an overview of ADO.NET, which is Microsoft's data access technology for .NET applications to connect to and manipulate data in various data stores. It discusses key ADO.NET concepts like connections, commands, data readers, data adapters, datasets and how they are used to work with different data providers like SQL Server, OLE DB, and ODBC. It also covers data binding using data grids and filtering data views.
The document discusses data access in .NET applications. It describes how earlier models like DAO and ADO had issues around performance and connectivity. ADO.NET improved on ADO by using a disconnected data access model where connections are opened briefly to perform operations then closed. ADO.NET relies on datasets, which hold in-memory representations of data, and data providers like SQL Client that maintain connections to databases.
This document provides an overview of ADO.NET components including data providers, datasets, datatables, connections, commands, parameters, dataadapters, and datareaders. It discusses the architecture of ADO.NET and the roles and properties of key classes. The data provider, connection, and command classes are described in detail along with examples of how to establish a connection and execute commands against a database.
This document discusses files and streams in .NET framework 4.5. It covers navigating the file system using classes like FileInfo, DirectoryInfo, and DriveInfo. It also discusses reading and writing files using streams, including FileStream for binary data and StreamReader/StreamWriter for text. Key points covered include getting information on files and directories, creating/deleting files and folders, and reading/writing files using streams in a simple way compared to FileStream.
Disconnected Architecture and Crystal report in VB.NETEverywhere
This document discusses disconnected architecture in ADO.NET. It explains that ADO.NET uses a dataset object to enable disconnected data access through filling the dataset using a data adapter. The dataset acts as an in-memory cache of data and does not interact directly with the data source. Data tables within the dataset contain rows and columns of data. The data adapter acts as a bridge between the dataset and data source, using commands to fill the dataset from a query and update changes back to the source. Stored procedures can also be used to encapsulate database operations when working with a dataset in a disconnected manner.
The document discusses ADO.NET programming and concepts such as:
- ADO.NET architecture and its main components - data providers and DataSet
- Connected and disconnected data access architectures supported by ADO.NET
- Common ADO.NET objects like Connection, Command, DataReader and DataAdapter and how they are used to execute queries, read and manipulate data
- The DataSet object which acts as an in-memory representation of data and enables disconnected data access
- Binding DataGrid control to a DataSet to display retrieved data
The document discusses ADO.NET and working with datasets and data adapters in a disconnected model. It provides an introduction to ADO.NET and how it allows connecting application UIs to data sources. It describes dealing with databases using connected and disconnected models and the ADO.NET data architecture. It explains how to work with datasets as in-memory representations of data with tables, columns, rows and relations. It discusses using a data adapter to populate a dataset from a data source using Fill() and update the data source from the dataset using Update().
This document provides an overview of ADO.NET and how to access relational data using it in Microsoft Visual Studio .NET. It covers key ADO.NET concepts like the object model, DataSets, and DataAdapters. It also demonstrates how to connect to a database, generate and populate a DataSet, and display dataset data in list-bound controls like a DataGrid. The document includes lessons, demonstrations, and a practice activity on these topics.
This document discusses data representation in C# and ADO.NET. It begins by explaining that C# objects are similar to Java objects but with properties instead of getter/setter methods. It then covers how to create a class with properties in C# and use objects. The document also discusses encapsulation in ADO.NET and how it handles connecting to databases. It provides steps for connecting to a database, creating a data adapter and dataset, binding controls to display data, and adding code to populate the dataset and allow navigation between records.
With help of this small Proof of Concept, I have tried to demonstrate the usage of Neo4J (Graph DB) as a metastore for a Data Lake or a DW. Graph DBs can store highly relational data and help us in doing data discovery and impact analysis, which bit more complex to bee done in an RDBMS.
This document provides an overview of relational database programming using ADO.NET. It discusses relational database systems and SQL, connecting applications to databases, using database objects like commands and readers, and executing statements. Key topics covered include relational models, SQL, database constraints, ADO.NET providers and objects, parameterized commands, and transactions.
This document discusses working with ADO.NET. It identifies the key components of ADO.NET, including data providers, data adapters, datasets, and data commands. It explains that ADO.NET uses a disconnected data architecture with data cached in datasets. It also compares typed and untyped datasets.
This document provides an overview of accessing relational data using Microsoft Visual Studio .NET and ADO.NET. It discusses what .NET and ADO.NET are, the history and evolution of ADO.NET, the core ADO.NET object model including DataSets, DataAdapters, and list-bound controls. It also provides an example of using ADO.NET with SQL Server to populate and display data in a datagrid.
ADO.NET provides a disconnected data access model that establishes connections to databases only when needed to execute commands or retrieve data. This improves performance, security, and scalability compared to ADO which uses a connected model. ADO.NET relies on two main components - the DataSet, which stores an in-memory copy of retrieved data, and Data Providers which include Connection, Command, DataReader and DataAdapter classes to interface with databases and populate/update the DataSet.
Entity Framework is an object-relational mapper (ORM) framework that was first released in .NET 3.5 SP1 along with Visual Studio 2008 SP1. The current version is Entity Framework 4.0, which was released with .NET 4.0 and Visual Studio 2010. Entity Framework provides an abstraction of ADO.NET and allows developers to work with entity classes instead of directly with the database schema. It handles CRUD operations and mapping relationships between entities and database tables. Behind the scenes, Entity Framework uses ADO.NET but abstracts these details from developers.
The document discusses mapping XML to databases. It covers understanding XML data transfer through table-based mapping and object-relational mapping. It also discusses displaying data from multiple tables using query languages embedded in XML documents. The best practices outlined include using appropriate data access objects, centralized data access functions, and SQL data types.
The document discusses accessing and manipulating data in ADO.NET. It covers pre-assessment questions about ADO.NET concepts like data providers and data binding. It then discusses implementing simple and complex data binding to controls. Finally, it discusses filtering and sorting data using parameterized queries, the Select method on datasets, and DataView objects.
Learning MVC Part 3 Creating MVC Application with EntityFrameworkAkhil Mittal
This document discusses connecting an existing MVC application to a database using Entity Framework instead of LINQ to SQL. It provides steps to generate an Entity Data Model from an existing database, generate strongly typed entity classes, and modify the application's controllers to use the Entity Framework context instead of the LINQ to SQL context. The key steps are: 1) Adding an Entity Data Model file and generating entity classes; 2) Modifying controllers to use the Entity Framework context instead of LINQ to SQL; 3) Binding views to the generated entity classes. The document emphasizes that Entity Framework automates CRUD operations and allows focusing on business logic rather than data access code.
This document discusses ADO.NET, which is a set of classes that allows .NET applications to communicate with databases. It provides advantages over classic ADO such as supporting both connected and disconnected data access. The key components of ADO.NET are data providers, which act as bridges between applications and databases, and the DataSet, which allows storing and manipulating relational data in memory disconnected from the database.
The document discusses ADO.Net Entity Framework. It describes how the Entity Framework provides a graphical representation of database relationships to make them easier to understand. It uses XML files to define conceptual, storage, and mapping models. These models define how the database appears to applications, storage, and how the two are mapped. The Entity Framework supports database first, design first, and code first approaches. Lambda expressions and LINQ to Entities are used to query data. Advantages include easy CRUD operations and managing relationships.
Microsoft Entity Framework is an object-relational mapper that allows developers to work with relational data as domain-specific objects, and provides automated CRUD operations. It supports various databases and provides a rich query capability through LINQ. Compared to LINQ to SQL, Entity Framework has a full provider model, supports multiple modeling techniques, and continuous support. The Entity Framework architecture includes components like the entity data model, LINQ to Entities, Entity SQL, and ADO.NET data providers. Code First allows defining models and mapping directly through code.
The document discusses the Data Access Object (DAO) pattern in J2EE applications. The DAO pattern separates business logic from data access logic. A DAO provides a common interface to access a data source. The DAO encapsulates data source access and manages data transfer objects (DTOs) that are used to exchange data between business objects and the DAO. Sample code illustrates a DAO interface, implementation, DTO, and client using the DAO to access inventory data without coupling to the specific data source implementation.
Building N Tier Applications With Entity Framework Services 2010David McCarter
Learn how to build real world nTier applications with the new Entity Framework and related services introduced in .NET 3.5 SP1. With this new technology built into .NET, you can easily wrap an object model around your database and have all the data access automatically generated or use your own stored procedures and views. Then learn how to easily and securely expose your object model using WCF with just a few line of code using ADO.NET Data Services. The session will demonstrate how to create and consume these new technologies from the ground up. Lots of code!
This document provides an overview of database concepts and the history of data access APIs in Microsoft technologies. It defines what a database and DBMS are, lists some common DBMSs, and explains what data access is and why universal data access is important. It then summarizes the evolution of Microsoft's data access APIs from ODBC and DAO, which had limitations, to RDO, OLE DB, and ADO, which improved performance and universality.
The ADO.NET Entity Framework is part of Microsoft’s next generation of .NET technologies. It is intended to make it easier and more effective for object-oriented applications to work with data.
Course Title: Database Programming with SQL
Course Code: DEE 431
TOPICS COVER:
Database Terminologies
Drawbacks of Traditional System
Data processing Modes
Application of DBMS
Types of Database
Histroy of Database
Characteristics of Database
Advantages and Disadvantages of Database
Types of database architecture: 1 Tier, 2 Tier, 3 Tier
ADO.NET is Microsoft's data access technology for .NET applications to connect to data sources. It uses a multilayered architecture centered around connections, commands, and dataset objects. Key differences from ADO include using a generic set of objects regardless of data source and a data provider model. ADO.NET supports features like interoperability, maintainability, typed programming, and performance through its disconnected data architecture.
MDAC is a framework that allows developers to access data stores uniformly. It consists of ADO, OLE DB, and ODBC components. MDAC architecture includes three layers: a programming interface (ADO/ADO.NET), a database access layer provided by vendors, and the database. OLE DB allows uniform data store access. ODBC provides a native interface through which drivers access specific databases. ADO is a high-level interface that uses OLE DB. It consists of objects and collections that allow creating, retrieving, updating and deleting data.
The document discusses ADO.NET fundamentals including:
- ADO.NET allows .NET applications to connect to data sources, execute commands, and manage disconnected data.
- It uses a multilayered architecture with key concepts like Connection, Command, and DataSet objects.
- ADO.NET includes data providers that provide optimized access to specific databases through Connection, Command, DataReader, and DataAdapter classes.
- Fundamental classes include Connection for establishing connections, Command for executing queries/stored procedures, and DataReader for fast read-only access to query results.
The document discusses various data access patterns used in Java applications, including the Data Access Object (DAO) pattern, Value Object (VO) pattern, and handling data access exceptions. It describes using DAO interfaces to abstract data access logic and database details. Value objects wrap database rows to allow working with business objects. The document provides examples of implementing these patterns for a sample application.
This document discusses the data access layer (DAL) in .NET applications. The DAL is responsible for persisting the application's object model to the database in a configurable and database-independent way. It handles object-relational mapping and transaction management. The core .NET library used for database access is ADO.NET, which includes classes for connections, commands, data readers, and data adapters. Unit testing the DAL validates its behavior using assertions.
The document discusses legacy connectivity and protocols. It describes legacy integration as integrating J2EE components with legacy systems. The key approaches to legacy integration are data level integration, application interface integration, method level integration, and user interface level integration. Legacy connectivity can be achieved using Java Native Interface (JNI), J2EE Connector Architecture, and web services. JNI allows Java code to call native methods written in other languages like C/C++. The J2EE Connector Architecture standardizes connectivity through resource adapters. Web services provide a platform-independent approach through XML protocols.
The document discusses messaging and internationalization. It covers messaging using Java Message Service (JMS), including the need for messaging, messaging architecture, types of messaging, messaging models, messaging servers, components of a JMS application, developing effective messaging solutions, and implementing JMS. It also discusses internationalizing J2EE applications.
The document discusses Java 2 Enterprise Edition (J2EE) application security. It covers security threat assessment, the Java 2 security model, and Java security APIs. The Java 2 security model provides access controls and allows downloading and running applications securely. It uses techniques like cryptography, digital signatures, and SSL. The Java Cryptography Extensions API provides methods for encrypting data, generating keys, and authentication.
The document discusses various security tools in Java including keytool, jarsigner, and policytool. Keytool is used to manage keystores containing private keys and certificates. It can generate key pairs, import/export certificates, and list keystore contents. Jarsigner signs JAR files using certificates from a keystore. Policytool creates and edits security policy files specifying user permissions. The document provides details on using each tool's commands and options.
This document discusses EJB technology and provides summaries of key concepts:
1. It defines the EJB container model and describes features like security, distributed access, and lifecycle management.
2. It compares the lifecycles of stateless session beans, stateful session beans, entity beans, and message-driven beans.
3. It contrasts stateful and stateless session beans and discusses differences in client state, pooling, lifecycles, and more. It also compares session beans and entity beans in terms of representing processes versus data.
This document discusses behavioral design patterns and J2EE design patterns. It provides descriptions and class diagrams for several behavioral patterns, including Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, and Visitor. It also defines what a J2EE design pattern is and notes that J2EE patterns are categorized into the presentation, business, and integration tiers of an enterprise application.
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Ado.net session01
1. Developing Database Applications Using ADO.NET and XML
Rationale
Business applications need to manage voluminous data.
Data is generally stored in a relational database in the form
of related tables or is stored in text format in XML
documents. Most business applications allow users to
retrieve the data stored in a database and present it in a
user-friendly interface without writing the database
commands. ADO.NET is a model used by .NET applications
to communicate with a database for retrieving, accessing,
and updating data. This module will provide the necessary
skills to the students to work as a database application
developer in the industry.
Ver. 1.0 Session 1 Slide 1 of 25
2. Developing Database Applications Using ADO.NET and XML
Prerequisites
A student registering for this module should be able to
perform the following tasks:
Work with XML
Work with SQL queries
Ver. 1.0 Session 1 Slide 2 of 25
3. Developing Database Applications Using ADO.NET and XML
Case Study - Tebisco
Brief History
Tebisco is a leading producer and distributor of snacks in the
U.S., as well as in most of the company’s 23 international
markets. In 1998, consumers spent $9.2 billion on Tebisco’s
snacks, $1.4 billion more than in the previous year.
Tebisco started as a small bakery in Round Rock, Texas in
1978. In a short time, its gingersnaps, macaroons, shortbread
and other cookies were popular all over the U.S. Three years
ago, the management embarked on a rapid expansion plan.
They set up offices in Asia and Europe, in addition to
strengthening their U.S. operations.
Tebisco has got a centralized database management system
whereby the information about all the HR activities is
maintained.
Ver. 1.0 Session 1 Slide 3 of 25
4. Developing Database Applications Using ADO.NET and XML
Objectives
In this session, you will learn to:
Understand the ADO.NET object model
Create and manage connections
Ver. 1.0 Session 1 Slide 4 of 25
5. Developing Database Applications Using ADO.NET and XML
Understanding ADO.NET
Business applications allow users to retrieve data from a
database by presenting data in a user-friendly interface.
User need not remember the database commands for
retrieving or updating data in the database.
Microsoft has created a family of data access technologies
to help programmers build efficient applications to access
data, regardless of its source.
The guidelines that can be followed for selecting an
appropriate data access technology are:
Use ADO.NETODBC a Java code native code
JDBC DB for writing a managed
(OLE) for for writing a Microsoft code
Microsoft writing for writing a targeting
based application, a VB 6 COMin Visual Basic,
SQL Server.
targeting the .NET Framework or C++.
Windows by using C application, or
C#, and C++.
a C++ application using COM.
Ver. 1.0 Session 1 Slide 5 of 25
6. Developing Database Applications Using ADO.NET and XML
Understanding ADO.NET (Contd.)
ADO.NET is a part of the .NET Framework architecture.
Ver. 1.0 Session 1 Slide 6 of 25
7. Developing Database Applications Using ADO.NET and XML
The ADO.NET Object Model
ADO.NET is based on an object model that is based on the
standards laid down by W3C.
The following figure shows the ADO.NET object model.
Ver. 1.0 Session 1 Slide 7 of 25
8. Developing Database Applications Using ADO.NET and XML
The ADO.NET Object Model (Contd.)
The two key components of ADO.NET Object model are:
Data provider Is required for:
Dataset Connecting to a database.
Retrieving data.
Storing the data in a dataset.
Reading the retrieved data.
Updating the database.
Has four key components:
Connection
Command
DataReader
DataAdapter
Ver. 1.0 Session 1 Slide 8 of 25
9. Developing Database Applications Using ADO.NET and XML
The ADO.NET Object Model (Contd.)
The two key components of ADO.NET Object model are:
Data provider
Dataset Is a disconnected, cached set of
records that are retrieved from a
database.
Is present in the Dataset class in
the System.Data namespace.
Has the following key
components:
DataTableCollection
DataRelationCollection
DataTable
DataRowCollection
DataColoumnCollection
Ver. 1.0 Session 1 Slide 9 of 25
10. Developing Database Applications Using ADO.NET and XML
Just a minute
Which of the following components of a data provider is
used to retrieve, insert, delete, or modify data in a data
source?
1. Connection
2. Command
3. DataReader
4. DataAdapter
Answer:
2. Command
Ver. 1.0 Session 1 Slide 10 of 25
11. Developing Database Applications Using ADO.NET and XML
Features of ADO.NET
The key features of ADO.NET are:
Disconnected data architecture Applications connect to
Data cached in datasets the database only while
The data is retrieved
Scalability retrieving anddatasets.
Database in updating
and storedoperations
data.can work withthe
Youperformed on the
are is the fundamental
Data transfer in XML format XML
Connection withofaon
records insteadinthe
format stored
datasetfor data transfer
database is closed,
dataset as you work
the database.
in ADO.NET.
oncereal data. is
As a the data
with result,dataset is
Because a resources
retrieved. and the
Thesaved is
are dataset XML
stored in the
Connection candatathe
independentis meet
format, you of
database can
re-established when of
source anddemands the
transmit it you remain
increasing between
data needs to from the
disconnected be
users more efficiently.
different types of
updated.
data source.
applications.
Ver. 1.0 Session 1 Slide 11 of 25
12. Developing Database Applications Using ADO.NET and XML
Creating and Managing Connections
To create and manage connections, you need to:
Create a connection object.
Create a command object.
Open the connection object.
Execute the SQL statement in the command object.
Close the connection object.
Ver. 1.0 Session 1 Slide 12 of 25
13. Developing Database Applications Using ADO.NET and XML
Creating a Connection Object
Execute the following steps to create a connection to the
database:
SqlConnection connection = Create a SqlConnection object.
new SqlConnection(); SqlConnection class is used to
connect to a SQL Server.
connection.ConnectionString = The ConnectionString property
"Data Source=SQLSERVER01; Name of the Server to be used
provides information, such as the
when a connection is open
Initial Catalog=HR; Name of the and database name,
data source database
that is used to establish a
User ID=sa; Used to specify the Server login
connection with a database.
account
Password=password"; Login password for the Server
account
Ver. 1.0 Session 1 Slide 13 of 25
14. Developing Database Applications Using ADO.NET and XML
Just a minute
Which of the following parameters of ConnectionString is
used to specify the name of the database?
1. Provider
2. Initial Catalog
3. Data source
4. Database
Answer:
2. Initial Catalog
Ver. 1.0 Session 1 Slide 14 of 25
15. Developing Database Applications Using ADO.NET and XML
Creating a Command Object
Execute the following steps to create a command object:
SqlCommand cmd = new To execute an SQL statement, you need
to
SqlCommand
create an instance of the SqlCommand
(“SELECT * FROM The two parameters that are passed to the
class.
monthlysalary“ SqlCommnad object are, the SQL query to
,connection); be executed and the SqlConnection
object.
Ver. 1.0 Session 1 Slide 15 of 25
16. Developing Database Applications Using ADO.NET and XML
Opening the Connection Object
Execute the following steps to open a connection:
//SqlConnection connection It opens a database connection
with the property settings
connection.Open(); specified by the
ConnectionString property.
Ver. 1.0 Session 1 Slide 16 of 25
17. Developing Database Applications Using ADO.NET and XML
Executing SQL Statements in the Command Object
To execute the query passed in the Command object, you
can call one of the following methods:
//Creating a SqlConnection object
SqlConnection connection = new
SqlConnection();
//Creates a connection string to the HR
database
connection.ConnectionString = "Data Source=
SQLSERVER01; Initial Catalog=HR; User
ID=sa; Password=niit#1234";
connection.Open();
//Creating a SqlCommand object
SqlCommand cmd = new SqlCommand("select *
from monthlysalary", connection);
//Creating SqlReader object
SqlDataReader myReader =
cmd.ExecuteReader();
Ver. 1.0 Session 1 Slide 17 of 25
18. Developing Database Applications Using ADO.NET and XML
Closing the Connection Object
Execute the following steps
to close a connection:
//SqlConnection connection It closes the connection to the
database.
connection.Close();
Ver. 1.0 Session 1 Slide 18 of 25
19. Developing Database Applications Using ADO.NET and XML
Closing the Connection Object (Contd.)
Handling Connection Events:
– The two key events for the SqlConnection class are:
StateChange event This event occurs when the state
InfoMessage event of the connection changes.
This event occurs when an
It receives an message or type
informational argument of
StateChangeEventArgs.
warning is returned from a data
source.
StateChangeEventArgs has the
following properties:
It receives an argument of type
CurrentState
SqlInfoMessageEventArgs.
OriginalState
SqlInfoMessageEventArgs
has the following properties:
Errors
Message
Source
Ver. 1.0 Session 1 Slide 19 of 25
20. Developing Database Applications Using ADO.NET and XML
Implementing Connection Pooling
Connection pooling enables a data source to reuse
connections for a particular user.
Connection pooling is controlled by certain parameters that
are placed into the connection string.
• Connection timeout It is the time in seconds to wait
• Min pool size while a connection tothe data
It is used to mention the
source is attempted. The
minimum to mention the
• Max pool size It is used number of
default valuemaintained in the
connections is 15 of seconds.
• maximum number the
When true, it causes
Pooling pool. The default value the pool.
connections allowed in is 0. to
request for a new connection
• Connection reset It indicates that the database
The default value is 100.
be drawn from the pool.
• connection the maximum time
It specifies will be reset when
Load balancing
the connection is removed from
in seconds that a pooled
timeout, connection
the pool. should live.
connection
lifetime
• Enlist When the value is true, the
connection is automatically enlisted
into the creation thread’s current
transaction context.
Ver. 1.0 Session 1 Slide 20 of 25
21. Developing Database Applications Using ADO.NET and XML
Implementing Connection Pooling (Contd.)
A request for a connection is
made by the application using
the Open() method.
If the Pooling property is set
to true, the pooler attempts to
acquire a connection from the
pool otherwise a new
connection is created.
Close the connection by
calling the close() method.
Ver. 1.0 Session 1 Slide 21 of 25
22. Developing Database Applications Using ADO.NET and XML
Demo: Retrieving Data from a SQL Database
Problem Statement:
Tebisco is a leading producer and distributor of snacks in the
United States. It is planning to start its annual appraisal
process. Before starting up with the appraisal process, the
senior management requires a list of all employees. The details
include employee name, employee code, current position,
designation, and joining date.
As a member of the development team, you have been asked
to develop an application that will display the employee details.
Hint: You need to refer to the Employee table of the HR
database.
Ver. 1.0 Session 1 Slide 22 of 25
23. Developing Database Applications Using ADO.NET and XML
Summary
In this session, you learned that:
ADO.NET is a data access programming model for accessing
the data stored in a database from a .NET application.
The ADO.NET object model consists of two main components,
data provider and dataset.
A data provider is used for connecting to a database, retrieving
data, storing the data in a dataset, reading the retrieved data,
and updating the database.
The various types of data providers are:
.NET Framework data provider for SQL Server
.NET Framework data provider for OLEDB
.NET Framework data provider for ODBC
.NET Framework data provider for Oracle
Ver. 1.0 Session 1 Slide 23 of 25
24. Developing Database Applications Using ADO.NET and XML
Summary (Contd.)
The four key components of a data provider are:
Connection
Commnd
DataReader
DataAdapter
The dataset is memory-based relational representation of data.
The main features of ADO.NET are:
Disconnected data architecture
Data cached in datasets
Scalability
Data transfer in XML format
Ver. 1.0 Session 1 Slide 24 of 25
25. Developing Database Applications Using ADO.NET and XML
Summary (Contd.)
In order to create and manage connection to the database, you
need to perform the following steps:
1. Create a connection object.
2. Create a command object.
3. Open the connection object.
4. Execute the SQL statement in the command object.
5. Close the connection object.
The two key events for the SqlConnection class are:
StateChange event
InfoMessage event
Connection pooling enables a data source to reuse
connections for a particular user.
Ver. 1.0 Session 1 Slide 25 of 25