Gettting Column Value Using Checkbox in GridView Autopostback = true

Sometimes we need to have checkboxes in the GridView control and we want that as soon as the Checkbox is clicked/checked the postback happens and we get the value from the first row in the GridView control.

This can be easily done by using the following code:

<asp:GridView ID="GridView1" runat="server"  AutoGenerateColumns="False" OnRowCommand="GridView1_RowCommand">                              <asp:BoundField DataField="CategoryID"                 HeaderText="CategoryID" />                 <asp:BoundField DataField="CategoryName"                 HeaderText="CategoryName" />                 asp:TemplateField HeaderText="Select"                                              <asp:CheckBox ID="CheckBox1"                         AutoPostBack="true" runat="server"                         OnCheckedChanged="CheckBox1_CheckedChanged1" />                                                               </asp:TemplateField>                      </asp:GridView>

And the code behind:

 protected void CheckBox1_CheckedChanged1(object sender, EventArgs e)     {         CheckBox checkbox = (CheckBox)sender;         GridViewRow row = (GridViewRow) checkbox.NamingContainer;         Response.Write(row.Cells[0].Text);      }

Ohh by the way when you click a different checkbox it will show you the new value but does not clear the old checkbox. You can make a simple method "ClearCheckboxSelection" which clears all the checkboxes.

Hope you find this example useful:)