This document provides an overview of common ADO.NET objects used to interact with databases including SqlConnection, SqlCommand, SqlDataReader, and SqlDataAdapter. SqlConnection represents a connection to a database and is used to open and close connections. SqlCommand represents SQL statements and stored procedures and is used to execute queries and non-queries. SqlDataReader provides a forward-only stream of row data from a SELECT statement and SqlDataAdapter fills DataTables and DataSets from a database.

1. ADO.NET ObjectsSqlCommandSqlConnectionSqlDataReaderSqlDataAdapterDataTableDataSetDataView

2. ADO.NET Objects Connection helps you identifyDatabase ServerDatabase Name PasswordUserNameSqlConnectionDatabase

3. ADO.NET Objects SqlConnection con= new SqlConnection (“Data Source=(local);Initial Catalog=Master; Integrated Security=SSPI”); SqlConnection con= new SqlConnection (“Server=<Servername>;Data Source=(local);uid=<SqlServerUserId>;Pwd=<SqlServer Password>”);

4. ADO.NET Objects Various methods available in SqlConnection Object

5. Open()

6. Opens the connection to our database

7. Close()

8. Closes the database connection