如何将asyncPostBackTrigger添加到模板列，项目模板，DataGrid中的按钮

我需要为DataGrid模板列中的两个按钮添加一个触发器。我发现有一些贴子说要使用UniqueID将代码放在代码隐藏中。如何将asyncPostBackTrigger添加到模板列，项目模板，DataGrid中的按钮

有些东西与我的逻辑不符（或者它可能不在正确的位置）。当我运行它时，出现“对象引用未设置为对象的实例”错误。

我得到这个在我的“gridSelectTrigger.ControlID = btnSessionSelect.UniqueID”语句。

此逻辑是否需要在“ItemDataBound”事件中？或者我的逻辑错了？

<%@ Page Title="Admin Session Folders" Language="VB" MasterPageFile="~/MasterPage.master" AutoEventWireup="false" CodeFile="AdminAddEditReleaseAndFiles.aspx.vb" Inherits="AdminAddEditReleaseAndFiles" Theme="Standard" %>

<asp:Panel ID="pnlEditTopic" runat="server" CssClass="modalPopupEditTopic" Style="display: none;" > 
    <table cellspacing="0" class="borderTable0" width="100%" style=""> 
     <tr style="height:4px"> 
      <td colspan="6" align="center"> 
       <asp:ImageButton ID="btnAddTopic" runat="server" AlternateText="Add Topic" 
        ImageUrl="~/App_Themes/Common/images/BtnApply.jpg" Height="28px"> 
       </asp:ImageButton> 
       <asp:ImageButton ID="btnUpdateTopic" runat="server" AlternateText="Update Topic" 
        ImageUrl="~/App_Themes/Common/images/BtnApply.jpg" Height="28px"> 
       </asp:ImageButton> 
       <asp:ImageButton ID="btnDeleteTopic" runat="server" AlternateText="Delete Topic" 
        ImageUrl="~/App_Themes/Common/images/BtnDelete.jpg" Height="28px"> 
       </asp:ImageButton> 
       <asp:ImageButton ID="btnEditTopicClose" runat="server" AlternateText="Close Edit Topic Popup" 
        ImageUrl="~/App_Themes/Common/images/BtnCancel.jpg" Height="28px"> 
       </asp:ImageButton> 
      </td> 
     </tr> 
    </table> 
</asp:Panel> 

</ContentTemplate> 
</asp:UpdatePanel>

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Load 

If Not (IsPostBack) Then 
    Dim MainContent As ContentPlaceHolder = TryCast(Page.Master.FindControl("ContentPlaceHolder1"), ContentPlaceHolder) 
    Dim UpdatePanelSessions As UpdatePanel = TryCast(MainContent.FindControl("UpdatePanelSessions"), UpdatePanel) 
    Dim btnSessionSelect As Button = TryCast(UpdatePanelSessions.FindControl("btnSessionSelect"), Button) 
    Dim btnSessionDetail As Button = TryCast(UpdatePanelSessions.FindControl("btnSessionDetail"), Button) 
    Dim gridSelectTrigger As AsyncPostBackTrigger = New AsyncPostBackTrigger 
    Dim gridDetailTrigger As AsyncPostBackTrigger = New AsyncPostBackTrigger 
    gridSelectTrigger.ControlID = btnSessionSelect.UniqueID 
    gridSelectTrigger.EventName = "Click" 
    UpdatePanelSessions.Triggers.Add(gridSelectTrigger) 
    gridDetailTrigger.ControlID = btnSessionDetail.UniqueID 
    gridDetailTrigger.EventName = "Click" 
    UpdatePanelSessions.Triggers.Add(gridDetailTrigger) 
    End If 

End Sub

谢谢詹姆斯

来源

2009-12-09 James

明白了。更新面板需要儿童作为触发器设置为true。

来源

2009-12-10 01:56:49 James

如何将asyncPostBackTrigger添加到模板列，项目模板，DataGrid中的按钮

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