The SqlConnection, SqlCommand, and SqlDataReader objects (C#) : SqlDataReader « ADO.net Database « ASP.NET Tutorial

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%@ Import Namespace="System.Configuration" %>

<script runat="server">
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            SqlConnection MyConnection;
            SqlCommand MyCommand;
            SqlDataReader MyReader;

            MyConnection = new SqlConnection();
            MyConnection.ConnectionString = ConfigurationManager.ConnectionStrings["DSN_Northwind"].ConnectionString;

            MyCommand = new SqlCommand();
            MyCommand.CommandText = " SELECT TOP 3 * FROM CUSTOMERS ";
            MyCommand.CommandType = CommandType.Text;
            MyCommand.Connection = MyConnection;

            MyCommand.Connection.Open();
            MyReader = MyCommand.ExecuteReader(CommandBehavior.CloseConnection);

            gvCustomers.DataSource = MyReader;
            gvCustomers.DataBind();

            MyCommand.Dispose();
            MyConnection.Dispose();
        }
    }

</script>

<html>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:GridView ID="gvCustomers" runat="server">
        </asp:GridView>    
    </div>
    </form>
</body>
</html>

File: Web.config

<configuration>

  <connectionStrings>
        <add name="DSN_Northwind" 
             connectionString="Data Source=localhost\SQLEXPRESS;Initial Catalog=Northwind;Integrated Security=True"
             providerName="System.Data.SqlClient" />
    </connectionStrings>

</configuration>

18.6.SqlDataReader
	18.6.1.	Building Data Access Components with ADO.NET
	18.6.2.	Returning a Resultset
	18.6.3.	DataReader Multiple result set
	18.6.4.	The SqlConnection, SqlCommand, and SqlDataReader objects (C#)
	18.6.5.	The SqlConnection, SqlCommand, and SqlDataReader objects (VB)