want somthing like this....
protected void GridView1_RowEditing(object sender, GridViewEditEventArgs e)
{
int id = Convert.ToInt16(GridView1.DataKeys[e.NewEditIndex].Values[0].ToString());
cnn.Open();
SqlCommand cmd = new SqlCommand("delete from call_details where id=" + id, cnn);
int result = cmd.ExecuteNonQuery();
cnn.Close();
GridView1.DataBind();