Selected Index Changing Event In GridView In Asp.Net

Here we are binding a GridView in Asp.Net and C#.

Points Of Remember:

1. Fire GridView's SelectedIndexChanging event.

2. Add namespace System.Data and System.Data.SqlClient in your C# page.

<!DOCTYPE html>

<title > Selected Index Changing event in GridView in Asp.Net </ title>

</head>

<body>

<div>

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false"

OnSelectedIndexChanging="GridView1_SelectedIndexChanging" AutoGenerateSelectButton="True">

<asp:BoundField DataField="Name" HeaderText="Name" />

<asp:BoundField DataField="Branch" HeaderText="Branch" />

<asp:BoundField DataField="City" HeaderText="City" />

</Columns>

</asp:GridView>

<table>

<tr><td>Branch</td><td><asp:TextBox ID="txt_branch" runat="server"></asp:TextBox></td></tr>

</table>

</div>

</form>

</body>

</html>

C# Codes :

using System.Data;

using System.Data.SqlClient;

public partial class GridView : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!IsPostBack)

{

BindGridView();

}

//method for binding GridView

protected void BindGridView()

{

DataTable dt = new DataTable();

SqlConnection con = new SqlConnection( @"Data Source=JITESH-PC\SQL;Initial

Catalog=db_Student;Integrated Security=True");

SqlDataAdapter da = new SqlDataAdapter( "Select name,branch,city from tbl_student" , con);

con.Open();

da.Fill(dt);

con.Close();

if (dt.Rows.Count > 0)

{

GridView1.DataSource = dt;

GridView1.DataBind();

}

protected void GridView1_SelectedIndexChanging(object sender, GridViewSelectEventArgs e)

{

txt_name.Text = GridView1.Rows[e.NewSelectedIndex].Cells[1].Text;

txt_branch.Text = GridView1.Rows[e.NewSelectedIndex].Cells[2].Text;

txt_city.Text = GridView1.Rows[e.NewSelectedIndex].Cells[3].Text;

}

Output: