dgCategory是用于显示类别表的DataGrid

自动分页：AllowPaging= TRUE!!!!

private void dgCategory_PageIndexChanged(object source, System.Web.UI.WebControls.DataGridPageChangedEventArgs e)

        {

            dgCategory.CurrentPageIndex=e.NewPageIndex;

            dgCategory.DataBind();

        }

排序：默认按“PKId”排序

private void dgCategory_SortCommand(object source, System.Web.UI.WebControls.DataGridSortCommandEventArgs e)

        {

            string SortOrder=e.SortExpression.ToString();

            BindData(SortOrder);

        }

private void BindData(string SortOrder)

        {

            ProductSystem productSys=new ProductSystem();//底层数据接口

            CategoryData  categorySet=productSys.GetCategories(1); //底层数据接口，返回ID为1的Category

            DataView      categoryView=categorySet.Tables[CategoryData.CATEGORIES_TABLE].DefaultView;

            categoryView.Sort=SortOrder;

            lblTitle.Text="按"+SortOrder+"排序";

            dgCategory.DataSource=categoryView;

            dgCategory.DataBind();

        }

private void Page_Load(object sender, System.EventArgs e)

        {

            BindData("PKId");

        }

编辑，更新，取消：

private void dgCategory_EditCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

        {

            dgCategory.EditItemIndex=e.Item.ItemIndex;

            BindData("PKId");

        }

        private void dgCategory_CancelCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

        {

            dgCategory.EditItemIndex=-1;

            BindData("PKId");

        }

private void dgCategory_UpdateCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

        {

            string strUpdate="";

            strUpdate+="PKId='"+((TextBox)e.Item.Cells[1].Controls[0]).Text+"'";

            strUpdate+="ParentId='"+((TextBox)e.Item.Cells[2].Controls[0]).Text+"'";

            strUpdate+="Description='"+((TextBox)e.Item.Cells[3].Controls[0]).Text+"'";

            strUpdate+="IsLeaf='"+((TextBox)e.Item.Cells[4].Controls[0]).Text+"'";

            try

            {

                CagegorySet.ExecuteUpdate(strUpdate);//需要后台提供更新的接口

                dgCategory.EditItemIndex=-1;

            }

            catch

            {

                Response.Write("<script language='javascript'>alert('未能完成更新，请…………')</script>");

            }

            BindData("PKId");

        }

private void dgCategory_DeleteCommand(object source, System.Web.UI.WebControls.DataGridCommandEventArgs e)

       {

           //获得关键字,使用DataKeys集合访问数据列表控件中每个记录的键值（显示为一行）

           //使得用户可以存储键字段而无需在控件中显示它

           string PKId=dgCategory.DataKeys[e.Item.ItemIndex];

           CategorySet.ExecuteDelete(PKId);

       }*/