The document discusses database concepts and how to access and manage data in a database using Visual Studio and ADO.NET. It covers topics like understanding relational databases and the SQL language, configuring databases in Visual Studio, using direct and disconnected data access methods, and key ADO.NET classes and namespaces for connecting to and interacting with data.
ADO.NET Architecture
Data processing has traditionally relied primarily on a connection-based, two-tier model. As data
processing increasingly uses multi-tier architectures, programmers are switching to a
disconnected approach to provide better scalability for their applications.
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 Architecture
Data processing has traditionally relied primarily on a connection-based, two-tier model. As data
processing increasingly uses multi-tier architectures, programmers are switching to a
disconnected approach to provide better scalability for their applications.
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
This presentation gives introduction to ADO.Net.
Basic introduction to connected & Disconnected architecture.
and explain the each every component in Ado.net
JAM819 - Native API Deep Dive: Data Storage and RetrievalDr. Ranbijay Kumar
Nearly all apps need to store data on device. Join this session for an overview of the various APIs that can be used to store and retrieve data from device memory. Learn how to leverage different storage mechanisms available and what to consider. This session will cover, the file system, SQLite and persistent settings and how to implement this in your native C and Cascades application.
Database connectivity to sql server asp.netHemant Sankhla
This ppt will help those who are beginner in sql server, asp.net and C# and want to learn database connectivity. So i provide them the simpler code on this universe for their database enabled web or desktop application.
This presentation gives introduction to ADO.Net.
Basic introduction to connected & Disconnected architecture.
and explain the each every component in Ado.net
JAM819 - Native API Deep Dive: Data Storage and RetrievalDr. Ranbijay Kumar
Nearly all apps need to store data on device. Join this session for an overview of the various APIs that can be used to store and retrieve data from device memory. Learn how to leverage different storage mechanisms available and what to consider. This session will cover, the file system, SQLite and persistent settings and how to implement this in your native C and Cascades application.
Database connectivity to sql server asp.netHemant Sankhla
This ppt will help those who are beginner in sql server, asp.net and C# and want to learn database connectivity. So i provide them the simpler code on this universe for their database enabled web or desktop application.
UNIT : -(6)
CONNECTING DATABASE WITH ADO.NET
Content:
•ADO.NET Architecture
•Data provider and its core object
•DataSet class
•Data Binding
•SQL Data Source
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Generating a custom Ruby SDK for your web service or Rails API using Smithyg2nightmarescribd
Have you ever wanted a Ruby client API to communicate with your web service? Smithy is a protocol-agnostic language for defining services and SDKs. Smithy Ruby is an implementation of Smithy that generates a Ruby SDK using a Smithy model. In this talk, we will explore Smithy and Smithy Ruby to learn how to generate custom feature-rich SDKs that can communicate with any web service, such as a Rails JSON API.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Epistemic Interaction - tuning interfaces to provide information for AI support
Chapter 14
1. • Understanding Databases
• Configuring, Browsing & Modifying
Databases in Visual Studio
• SQL Basics
• The Data Provider Model
• Direct Data Access
• Creating Connection
• Select, Insert, Delete, Update Records
• Disconnected Data Access
• Selecting Multiple Tables
• Defining Relationships
2. The most common way to manage data is to use a
database. A typical web application is often
just a thin user interface shell on top of
sophisticated data-driven code that reads and
writes information from a database.
In a relational database model information is
stored in the form of tables. SQL Server, Oracle,
and Microsoft Access are examples of relational
database management system.
3. If you‟re using a full version of SQL Server, you‟ll probably
use a graphical tool such as SQL Server Management
Studio to create and manage your databases.
You can perform many of the same tasks using Visual
Studio‟s Server Explorer Window. Click View ➤ Server
Explorer to show it. Using the Data Connections node in
the Server Explorer, you can connect to existing
databases or create new ones.
Right-click the Data Connections node, and choose Add
Connection. If the Choose Data Source window appears,
select Microsoft SQL Server and then click Continue.
4.
5. SELECT [columns] FROM [tables] WHERE [search_condition]
ORDER BY [order_expression ASC | DESC]
SELECT au_lname, au_fname FROM Authors WHERE State='CA'
ORDER BY au_lname ASC
SELECT * FROM Sales WHERE ord_date < '2000/01/01' AND
ord_date > '1987/01/01„
SELECT * FROM Stores WHERE stor_name LIKE 'B%„ or „%S‟
SELECT COUNT(*) FROM Authors
UPDATE Authors SET phone='408 496-2222' WHERE au_id='172-
32-1176„
INSERT INTO Authors (au_id, au_lname, au_fname, zip, contract)
VALUES ('998-72-3566', 'Khan', 'John', 84152, 0)
DELETE FROM Authors WHERE au_id='172-32-1176'
6. ADO.NET relies on the functionality in a small set of
core classes.
You can divide these classes into two groups:
Data Containers that are used to contain and manage
data (such as DataSet, DataTable, DataRow, and
DataRelation)
Data Providers that are used to connect to a specific
data source (such as Connection, Command, and
DataReader).
7. The SQL Server data provider is designed to work with
SQL Server. The classes you‟ll use fall into three key
namespaces
8. The most straightforward way to interact with a database
is to use direct data access. You use commands to
query, insert, update, and delete information.
When you query data with direct data access, you don‟t
keep a copy of the information in memory. Instead, you
work with it for a brief period of time while the database
connection is open, and then close the connection as
soon as possible.
The direct data model is well suited to ASP.NET web
pages, which don‟t need to keep a copy of their data in
memory for long periods of time because a page
typically has a lifetime of only a few seconds.
9. 1. Create Connection, Command, and DataReader
objects.
2. Use the DataReader to retrieve information from the
database, and display it in a control on a web form.
3. Close your connection.
4. Send the page to the user. At this point, the
information your user sees and the information in the
database no longer have any connection, and all the
ADO.NET objects have been destroyed.
To add or update information, follow these steps:
1. Create new Connection and Command objects.
2. Execute the Command (with the appropriate SQL
statement).
10.
11. Before you can retrieve or update data, you need to
make a connection to the data source.
Generally, connections are limited to some fixed number,
and if you exceed that number (either because you run
out of licenses or because your database server can‟t
accommodate the user load), attempts to create new
connections will fail. For that reason, you should try to
hold a connection open for as short a time as possible.
You should also write your database code inside a
try/catch error handling structure so you can respond if
an error does occur, and make sure you close the
connection even if you can‟t perform all your work.
12. When creating a Connection object, you need to specify a
value for its ConnectionString property. This ConnectionString
defines all the information the computer needs to find the data
source, log in, and choose an initial database.
SqlConnection myConnection = new SqlConnection();
myConnection.ConnectionString = "Data Source=localhost;" +
"Initial Catalog=Pubs;Integrated Security=SSPI";
You can connect directly to any database file, even if
it‟s not in the master list of databases
myConnection.ConnectionString = @"Data Source
=localhostSQLEXPRESS;" + @"User Instance =True;
AttachDBFilename= |DataDirectory|Northwind.mdf;" +
"Integrated Security=True";
|DataDirectory| automatically points to the App_Data folder
13. Initial catalog: This is the name of the database that this connection will
be accessing. It’s only the “initial” database because you can change it
later by using the Connection.ChangeDatabase() method.
Integrated security: This indicates you want to connect to SQL Server
using the Windows user account that‟s running the web page code,
provided you supply a value of SSPI (which stands for Security Support
Provider Interface). Alternatively, you can supply a user ID and
password that‟s defined in the database for SQL Server authentication,
although this method is less secure and generally discouraged.
ConnectionTimeout: This determines how long your code will wait, in
seconds, before generating an error if it cannot establish a database
connection. Our example connection string doesn‟t set the
ConnectionTimeout, so the default of 15 seconds is used. You can use
0 to specify no limit, but this is a bad idea. This means that,
theoretically, the code could be held up indefinitely while it attempts
to contact the server.
16. string connectionString =
WebConfigurationManager.ConnectionStrings["Pubs"].ConnectionString;
SqlConnection myConnection = new SqlConnection(connectionString);
try {
using (myConnection)
{
// Try to open the connection.
myConnection.Open();
lblInfo.Text = "<b>Server Version:</b> " + myConnection.ServerVersion;
lblInfo.Text += "<br /><b>Connection Is:</b> " +
myConnection.State.ToString();
} }
catch (Exception err)
{
// Handle an error by displaying the information.
lblInfo.Text = "Error reading the database. ";
lblInfo.Text += err.Message;
}
lblInfo.Text += "<br /><b>Now Connection Is:</b> ";
lblInfo.Text += myConnection.State.ToString();
17. string selectSQL = "SELECT au_lname, au_fname, au_id FROM Authors";
SqlConnection con = new SqlConnection(connectionString);
SqlCommand cmd = new SqlCommand(selectSQL, con);
SqlDataReader reader;
try{
con.Open();
reader = cmd.ExecuteReader();
while (reader.Read()) {
ListItem newItem = new ListItem();
newItem.Text = reader["au_lname"] + ", " + reader["au_fname"];
newItem.Value = reader["au_id"].ToString();
lstAuthor.Items.Add(newItem);}
reader.Close(); }
catch (Exception err)
{
lblResults.Text = "Error reading list of names. ";
lblResults.Text += err.Message; }
finally
{
con.Close();
}
18. When you use disconnected data access, you keep a copy of
your data in memory using the DataSet. You connect to the
database just long enough to fetch your data and dump it into
the DataSet, and then you disconnect immediately.
Reasons to use the DataSet to hold onto data in memory:
• You need to do something time-consuming with the data
• You want to use ASP.NET data binding to fill a web control
(like a GridView) with your data.
• You want to navigate backward and forward through your
data while you‟re processing it.
• You want to navigate from one table to another.
• You want to save the data to a file for later use.