gridview中的排序事件未触发

Question

我搜索了很多次，但没有任何有用的链接来解决我的问题。我有AllwSorting =“true”和OnSort函数。今天我发布这个问题，谢谢你的帮助。 这是我的ASCX：

<asp:GridView ID="gvwCus" runat="server" CssClass="gridview" AlternatingRowStyle-CssClass="even" AutoGenerateColumns="false" GridLines="Vertical" AllowPaging="false" OnRowCommand="RowCommand" AllowSorting="true" OnSorting="gvwCus_OnSorting">
  <Columns>
     <asp:TemplateField ItemStyle-HorizontalAlign="Center" HeaderStyle-HorizontalAlign="Center" HeaderStyle-Width="4%">
        <HeaderTemplate>STT</HeaderTemplate>
        <ItemTemplate>
          <asp:Label ID="lblId" runat="server" Text="<%#Container.DataItemIndex + 1%>"></asp:Label>
        </ItemTemplate>
     </asp:TemplateField>
     <asp:BoundField HeaderStyle-Width="12%" DataField="field1" HeaderText="Field1_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center"/>
     <asp:BoundField HeaderStyle-Width="30%" DataField="field2" HeaderText="Field2_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center"/>
     <asp:BoundField HeaderStyle-Width="31%" DataField="field3" HeaderText="Field3_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center"/>
     <asp:BoundField HeaderStyle-Width="20%" DataField="field4" HeaderText="Field4_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center" />
     <asp:CommandField HeaderStyle-Width="2%" ButtonType="Image" SelectImageUrl="~/Images/detail.png" ShowSelectButton="true" />
  </Columns>
</asp:GridView>

我的代码背后：ASCX.CS，我有排序事件的gvwCus_OnSorting函数，但是当我点击gridview的标题时没有处理任何事件。

protected void gvwCus_OnSorting(object sender, GridViewSortEventArgs e)
{
   DataBind(e);
}

private void DataBind(GridViewSortEventArgs eventArgs)
{
   var dataOracle = new DataOracle();
   var data = dataOracle.GetDataTable();
   if(eventArgs != null)
   {
      data.DefaultView.Sort = eventArgs.SortExpression + " " + GetSortDirection(eventArgs.SortExpression);
   }
   gvwCustom.DataSource = data;
   gvwCustom.DataBind();
}

private string GetSortDirection(string column)
{
string sortDirection = "DESC";
string sortExpression = ViewState["SortExpression"] as string;

if (sortExpression != null)
{
    if (sortExpression == column)
    {
        string lastDirection = ViewState["SortDirection"] as string;
        if ((lastDirection != null) && (lastDirection == "DESC"))
        {
            sortDirection = "ASC";
        }
    }
}

ViewState["SortDirection"] = sortDirection;
ViewState["SortExpression"] = column;

return sortDirection;
}

谢谢！

Answer 1

您没有为要排序的列设置 SortExpression 。添加SortExpression，您将看到每列的超链接。单击这些链接将触发排序事件。添加sortexpression后，您的boundfields应如下所示：

 <asp:BoundField SortExpression="field1" HeaderStyle-Width="12%" DataField="field1" HeaderText="Field1_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center"/>
 <asp:BoundField SortExpression="field2" HeaderStyle-Width="30%" DataField="field2" HeaderText="Field2_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center"/>
 <asp:BoundField SortExpression="field3" HeaderStyle-Width="31%" DataField="field3" HeaderText="Field3_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center"/>
 <asp:BoundField SortExpression="field4" HeaderStyle-Width="20%" DataField="field4" HeaderText="Field4_Header" ItemStyle-HorizontalAlign="Left" HeaderStyle-HorizontalAlign="Center" />

呈现的标题应如下所示：