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GridView DataBind

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs"  Inherits="GridViewDataBind" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">     <title>Untitled Page</title> </head> <body>     <form id="form1" runat="server">     <div>         <asp:GridView ID="grid" runat="server">         </asp:GridView>          </div>     </form> </body> </html> File: Default.aspx.cs using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Data.SqlClient; public partial class GridViewDataBind : System.Web.UI.Page {   protected void Page_Load(object sender, System.EventArgs e)   {     if (!Page.IsPostBack)     {       string connectionString = "Data Source=localhost;Initial Catalog=Northwind;Integrated Security=SSPI";       string sql = "SELECT EmployeeID, FirstName, LastName, Title, City FROM Employees";       SqlConnection con = new SqlConnection(connectionString);       SqlCommand cmd = new SqlCommand(sql, con);       try       {         con.Open();         SqlDataReader reader = cmd.ExecuteReader();         grid.DataSource = reader;         grid.DataBind();         reader.Close();       }       finally       {         con.Close();       }     }   } }