DataGrid经典编辑更新删除代码

private void DataGrid1_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
  {   
   DataGrid1.EditItemIndex=(int)e.Item.ItemIndex;
   BindGrid();
  }

  private void DataGrid1_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)
  {
   DataGrid1.CurrentPageIndex=e.NewPageIndex;
   BindGrid();
  }

  private void DataGrid1_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
  {
   SqlCommand cm=new SqlCommand("deleteEmp",mySqlConn);
   cm.CommandType=CommandType.StoredProcedure;
   cm.Parameters.Add(new SqlParameter("@Empid",SqlDbType.Int,4));
   cm.Parameters["@Empid"].Value=DataGrid1.DataKeys[(int)e.Item.ItemIndex];
  
   cm.Connection.Open();
   try
   {
    cm.ExecuteNonQuery();
    Label1.Text="删除成功";
   
   }
   catch(SqlException)
   {
    Label1.Text="删除失败";
    Label1.Style["color"]="red";
   }
   cm.Connection.Close();  
   BindGrid();
  }

  private void DataGrid1_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
  {
   DataGrid1.EditItemIndex=-1;   
   BindGrid();
  }

  private void DataGrid1_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)
  {
   SqlCommand cm=new SqlCommand("UpdateEmp",mySqlConn);
   cm.CommandType=CommandType.StoredProcedure;
      
   cm.Parameters.Add(new SqlParameter("@Email",SqlDbType.VarChar,50));  
   cm.Parameters.Add(new SqlParameter("@tell",SqlDbType.VarChar,50));
   cm.Parameters.Add(new SqlParameter("@jb",SqlDbType.Int,4));
   cm.Parameters.Add(new SqlParameter("@Emp_id",SqlDbType.Int,4));
   string colvalue=((TextBox)e.Item.Cells[4].Controls[0]).Text;
   cm.Parameters["@Email"].Value=colvalue;
 
   colvalue=((TextBox)e.Item.Cells[5].Controls[0]).Text;
   cm.Parameters["@jb"].Value=colvalue;
   colvalue=((TextBox)e.Item.Cells[6].Controls[0]).Text;
   cm.Parameters["@tell"].Value=colvalue;
    
   cm.Parameters["@Emp_id"].Value=DataGrid1.DataKeys[(int)e.Item.ItemIndex];
   cm.Connection.Open();
   try
   {
    cm.ExecuteNonQuery();
    Label1.Text="编辑成功";
    DataGrid1.EditItemIndex=-1;
   }
   catch(SqlException)
   {
    Label1.Text="编辑失败";
    Label1.Style["color"]="red";
   }
   cm.Connection.Close(); 
   BindGrid();
  }