能不能帮我看看datagrid分页的错误在哪儿？急啊~~~~~~~~

分页有什么错误？删除：aspx页面里dg加入DataKeyField="id"
private  void  dg_delete(object  sender,System.Web.UI.WebControls.DataGridCommandEventArgs  e)
{
   txtsql="delete  from  test  where  id="+dg.DataKeys[e.Item.ItemIndex].toString();
   executesql(txtsql,errormsg);
   dg_bind();
}