Grid RowUpdate

 protected void gvwtest_RowUpdating(object sender, GridViewUpdateEventArgs e)
  {
      TextBox txtEditName = gvwtest.Rows[e.RowIndex].FindControl("txtEditName") as TextBox;
      if (txtEditName.Text == "")
     {
     DisplayMessage("Please Enter Name");
     return;
     }
     Test_Info oTest_Info = new Test_Info();
     ImageButton ibtnUpdate = gvwtest.Rows[e.RowIndex].FindControl("ibtnUpdate") as ImageButton;

     oTest_Info.Id = Convert.ToInt32(ibtnUpdate.CommandArgument);
     oTest_Info.Name = txtEditName.Text.Trim();
    
     Test_BL oTest_BL = new Test_BL();
     int Result=oTest_BL.UpdateName(oTest_Info.Id,oTest_Info.Name);
     if (Result == 1)
     {
     DisplayMessage("Updated successfully");
     }
     else
     {
     DisplayMessage("Same  Name Already Exist");
     }
     gvwtest.EditIndex = -1;
     FillGrid();
}