blocks|key|2989155|text|我已经解决了将ScriptManager的ScriptManager属性设置为发布(而不是默认的调试)的问题，将ScriptManager设置为Debug模式。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2989156|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I've solved the problem setting ScriptMode property of ScriptManager to Release instead of Debug
By default ScriptManager is set to Debug mode.

blocks|key|2989176|text|在我的例子中，这是由Modal弹出窗口中的更新面板中的“关闭”控件造成的。我在更新面板外创建了一个“虚拟”按钮，并将其设置为MPE属性中的“CancelControlID”：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2989177|<asp:Button+ID="btnDummyCloseWindow"+runat="server"+Style="visibility:+hidden"/>

<ajaxToolkit:ModalPopupExtender+ID="mpeWindow"+runat="server"+PopupControlID="pnlWindow"
++++TargetControlID="btnDummyOtherButton"+BackgroundCssClass="modalBackground"
++++DropShadow="false"+CancelControlID="btnDummyCloseWindow"+/>|code-block|syntax|javascript|2989178|您需要确保“更新面板”中的“关闭”按钮有指定的操作来关闭窗口(例如，mpeWindow.hide())。|2989179|还值得注意的是，我也在使用TargetControlID+'fix‘，其中引用了一个虚拟按钮，因此忽略那里的TargetControlID属性。|2989180|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

In my case this was caused by having the 'Close' control within an Update Panel in the Modal Popup. I fixed it by creating a 'dummy' button outside of the Update Panel, and setting it as the 'CancelControlID' in the MPE attributes:

<pre><code>&lt;asp:Button ID="btnDummyCloseWindow" runat="server" Style="visibility: hidden"/&gt;

&lt;ajaxToolkit:ModalPopupExtender ID="mpeWindow" runat="server" PopupControlID="pnlWindow"
 TargetControlID="btnDummyOtherButton" BackgroundCssClass="modalBackground"
 DropShadow="false" CancelControlID="btnDummyCloseWindow" /&gt;
</code></pre>

You'll need to make sure the close button that is present within your Update Panel has actions assigned to it to close the window (e.g. mpeWindow.hide()).

It's also worth noting that I was also making use of the TargetControlID 'fix' too, where a dummy button is referenced, so ignore the TargetControlID attribute there.

blocks|key|1434376|text|我也遇到了同样的问题，并通过在更新面板中放置ModalPopupExtender或使用ModalPopupExtender的用户控件解决了问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1434377|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I had the same problem and solved by placing the ModalPopupExtender or the user control that uses ModalPopupExtender inside an update panel.

blocks|key|2631378|text|从您想要看的角度来看，问题是继承了我认为是AJAX中的bug。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2631379|我能够解决这个问题的唯一方法是在您控制的服务器端控制排序或分页，或者更具体地说，控制刷新UpdatePanel，同时确保ModalPopup保持可见！|2631380|造成此错误的原因实际上是因为一旦在GridView上对UpdatePanel中的某个页面进行了某种更改，控件就会“丢失”给UpdatePanel。|2631381|一个更好的解释是这里。|2631382|这是我的GridView的专栏..。|2631383|++++<asp:GridView+ID="gvTETstudents"+runat="server"+AutoGenerateColumns="False"+AllowSorting="True"+CellPadding="4"+ForeColor="#333333"+Font-Size="Small"+Width="100%25"
++++++DataSourceID="sdsTETstudents"+
++++++OnRowCreated="gvTETstudents_RowCreated"+
++++++OnRowDataBound="gvTETstudents_RowDataBound"+
++++++OnDataBound="gvTETstudents_DataBound">
++++<Columns>
++++++++..
++++++++..
++++++++<ItemTemplate>
++++++++++++<asp:UpdatePanel+ID="upWEF1"+runat="server"+UpdateMode="Conditional"+ChildrenAsTriggers="true">
++++++++++++++++<Triggers>
++++++++++++++++++++<asp:AsyncPostBackTrigger+ControlID="btnWEFCLOSE"+/>
++++++++++++++++</Triggers>
++++++++++++++++<ContentTemplate>
...
...
++++++++++++++++++++<asp:Panel+ID="pnlWEF2"+runat="server"+style="display:none;">
++++++++++++++++++++++++<table><tr><td>
++++++++++++++++++++++++<asp:Button+ID="btnWEFshow"+runat="server"+
++++++++++++++++++++++++++++Text="ALL"+
++++++++++++++++++++++++++++Font-Size="Small"+Font-Names="Arial"+
++++++++++++++++++++++++++++ToolTip="Click+here+to+see+all+of+this+student's+work+experience+feedback+on+file"+/>
++++++++++++++++++++++++<ajaxToolkit:ModalPopupExtender+ID="mpeWEF"+runat="server"
++++++++++++++++++++++++++++BackgroundCssClass="modalBackground"
++++++++++++++++++++++++++++OkControlID="btnWEFCLOSE"
++++++++++++++++++++++++++++PopupControlID="upWEF2"
++++++++++++++++++++++++++++TargetControlID="btnWEFshow">
++++++++++++++++++++++++</ajaxToolkit:ModalPopupExtender>
++++++++++++++++++++++++<asp:UpdatePanel+ID="upWEF2"+runat="server"+UpdateMode="Conditional">
++++++++++++++++++++++++++++<ContentTemplate>
++++++++++++++++++++++++++++++++<asp:Panel+ID="pnlWEF3"+runat="server"+CssClass="pnlEndorsed">
++++++++++++++++++++++++++++++++++++<div+id="Hdr"+style="text-align:+center">
++++++++++++++++++++++++++++++++++++++++<asp:Label+ID="lblWEFHdr"+runat="server">**+CONTACT+LOG+**</asp:Label>
++++++++++++++++++++++++++++++++++++</div>
++++++++++++++++++++++++++++++++++++<div+id="Bdy">
++++++++++++++++++++++++++++++++++++++++<table+style="width:100%25"><tr><td>
++++++++++++++++++++++++++++++++++++++++<asp:GridView+ID="gvWEFContactLog"+runat="server"+
++++++++++++++++++++++++++++++++++++++++++++Font-Size="X-Small"+CellPadding="4"+ForeColor="#333333"+GridLines="None"+AllowPaging="true"+PageSize="8"+AllowSorting="True"+AutoGenerateColumns="False"+Width="100%25"+
++++++++++++++++++++++++++++++++++++++++++++DataKeyNames="StudentContactLogID,Private,ApprenticeContactLogID"
++++++++++++++++++++++++++++++++++++++++++++DataSourceID="sdsWEF"
++++++++++++++++++++++++++++++++++++++++++++OnRowDataBound="gvWEFContactLog_RowDataBound"
++++++++++++++++++++++++++++++++++++++++++++OnPageIndexChanging="gvWEFContactLog_PageIndexChanging"+
++++++++++++++++++++++++++++++++++++++++++++OnSorted="gvWEFContactLog_Sorted">
++++++++++++++++++++++++++++++++++++++++++++<Columns>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:TemplateField+HeaderText="First+Entered"+SortExpression="FirstEntered">
++++++++++++++++++++++++++++++++++++++++++++++++++++<ItemTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:HiddenField+ID="hfWEFStudCLid"+runat="server"+Value='<%25#+Eval("StudentContactLogID")+%25>'+/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:HiddenField+ID="hfWEFAppCLid"+runat="server"+Value='<%25#+Eval("ApprenticeContactLogID")+%25>'+/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:HiddenField+ID="hfPrivate"+runat="server"+Value='<%25#+Eval("Private")+%25>'+/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:HiddenField+ID="hfNotes"+runat="server"+Value='<%25#+Eval("ContactNotes")+%25>'+/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:LinkButton+ID="lnkWEFCLOG"+runat="server"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Text='<%25#+Eval("FirstEntered","{0:d+MMM+yyyy+HH:mm}")+%25>'></asp:LinkButton>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<a+id="lnkDummy"+runat="server"+visible=false></a>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<ajaxToolkit:ModalPopupExtender+ID="mpeWEFCLOG"+runat="server"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++OkControlID="btnWEFCLOSEview"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++PopupControlID="upWEFCLOG"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++TargetControlID="lnkWEFCLOG">
++++++++++++++++++++++++++++++++++++++++++++++++++++++++</ajaxToolkit:ModalPopupExtender>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:UpdatePanel+ID="upWEFCLOG"+runat="server"+UpdateMode="Conditional">
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<ContentTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<div+id="pnlWEFCLOG"+runat="server"+class="pnlCLOG">
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:TextBox+ID="txtWEFCLOG"+runat="server"+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Wrap="true"+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++TextMode="MultiLine"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Rows="10"+
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ReadOnly="true"
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++Width="98%25">
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</asp:TextBox>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<br+/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:Button+ID="btnWEFCLOSEview"+runat="server"+Text="OK"+Width="100%25"+/>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</div>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++</ContentTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++</asp:UpdatePanel>
++++++++++++++++++++++++++++++++++++++++++++++++++++</ItemTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++</asp:TemplateField>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:BoundField+DataField="Subject"+HeaderText="Subject"+SortExpression="Subject"+/>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:BoundField+Visible="False"+DataField="StudentContactLogID"+HeaderText="LogID"
++++++++++++++++++++++++++++++++++++++++++++++++++++InsertVisible="False"+ReadOnly="True"+SortExpression="StudentContactLogID">
++++++++++++++++++++++++++++++++++++++++++++++++++++<ItemStyle+HorizontalAlign="Center"+/>
++++++++++++++++++++++++++++++++++++++++++++++++++++<HeaderStyle+HorizontalAlign="Center"+/>
++++++++++++++++++++++++++++++++++++++++++++++++</asp:BoundField>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:BoundField+DataField="StaffName"+HeaderText="Staff"+ReadOnly="True"+SortExpression="StaffName"+/>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:TemplateField+HeaderText="Contact+Date+Time"+SortExpression="ContactDateTime">
++++++++++++++++++++++++++++++++++++++++++++++++++++<ItemTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:Label+ID="Label1"+runat="server"+Text='<%25#+Eval("ContactDateTime","{0:d+MMM+yyyy+HH:mm}")+%25>'></asp:Label>
++++++++++++++++++++++++++++++++++++++++++++++++++++</ItemTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++</asp:TemplateField>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:TemplateField+HeaderText="Follow-Up+Date"+SortExpression="FollowUpDate">
++++++++++++++++++++++++++++++++++++++++++++++++++++<ItemTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++++++++++<asp:Label+ID="Label2"+runat="server"+Text='<%25#+Eval("FollowUpDate","{0:d+MMM+yyyy}")+%25>'></asp:Label>
++++++++++++++++++++++++++++++++++++++++++++++++++++</ItemTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++</asp:TemplateField>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:BoundField+DataField="Private"+HeaderText="Private"+SortExpression="Private"+/>
++++++++++++++++++++++++++++++++++++++++++++</Columns>
++++++++++++++++++++++++++++++++++++++++++++<EmptyDataTemplate>
++++++++++++++++++++++++++++++++++++++++++++++++No+Current+Entries
++++++++++++++++++++++++++++++++++++++++++++</EmptyDataTemplate>
++++++++++++++++++++++++++++++++++++++++++++<FooterStyle+BackColor="#5D7B9D"+Font-Bold="True"+ForeColor="White"+/>
++++++++++++++++++++++++++++++++++++++++++++<RowStyle+BackColor="#F7F6F3"+ForeColor="#333333"+/>
++++++++++++++++++++++++++++++++++++++++++++<EditRowStyle+BackColor="#999999"+/>
++++++++++++++++++++++++++++++++++++++++++++<SelectedRowStyle+BackColor="#E2DED6"+Font-Bold="True"+ForeColor="#333333"+/>
++++++++++++++++++++++++++++++++++++++++++++<PagerStyle+BackColor="#284775"+ForeColor="White"+HorizontalAlign="Center"+/>
++++++++++++++++++++++++++++++++++++++++++++<HeaderStyle+BackColor="#5D7B9D"+Font-Bold="True"+ForeColor="White"+/>
++++++++++++++++++++++++++++++++++++++++++++<AlternatingRowStyle+BackColor="White"+ForeColor="#284775"+/>
++++++++++++++++++++++++++++++++++++++++</asp:GridView>
++++++++++++++++++++++++++++++++++++++++<asp:SqlDataSource+ID="sdsWEF"+runat="server"+ConnectionString="<%25$+ConnectionStrings:ATCNTV1ConnectionString+%25>"
++++++++++++++++++++++++++++++++++++++++++++SelectCommand="spTETStudentContactLogView"+SelectCommandType="StoredProcedure">
++++++++++++++++++++++++++++++++++++++++++++<SelectParameters>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:Parameter+Name="StudentID"+Type="string"+/>
++++++++++++++++++++++++++++++++++++++++++++++++<asp:Parameter+Name="WEF"+Type="string"+DefaultValue="%25"+/>
++++++++++++++++++++++++++++++++++++++++++++</SelectParameters>
++++++++++++++++++++++++++++++++++++++++</asp:SqlDataSource>
++++++++++++++++++++++++++++++++++++++++</td></tr>
++++++++++++++++++++++++++++++++++++++++<tr+style="text-align:+center">
++++++++++++++++++++++++++++++++++++++++++++<td+style="text-align:+left">
++++++++++++++++++++++++++++++++++++++++++++++++<asp:Button+ID="btnWEFCLOSE"+runat="server"+
++++++++++++++++++++++++++++++++++++++++++++++++++++Text="CLOSE"+
++++++++++++++++++++++++++++++++++++++++++++++++++++CausesValidation="false"+Font-Bold="True"+Width="61px"+/>
++++++++++++++++++++++++++++++++++++++++++++</td>
++++++++++++++++++++++++++++++++++++++++</tr>
++++++++++++++++++++++++++++++++++++++++</table>
++++++++++++++++++++++++++++++++++++</div>
++++++++++++++++++++++++++++++++</asp:Panel>
++++++++++++++++++++++++++++</ContentTemplate>
++++++++++++++++++++++++</asp:UpdatePanel>
++++++++++++++++++++++++</td></tr></table>
++++++++++++++++++++</asp:Panel>
++++++++++++++++</ContentTemplate>
++++++++++++</asp:UpdatePanel>
++++++++</ItemTemplate>|code-block|syntax|javascript|2631384|上面代码的要点是，我在一个位于内部的UpdatePanel中有一个非常深的+GridView。|2631385|现在看看我在这个GridView里面有什么：|2631386|OnPageIndexChanging|2631387|和|2631388|OnSorted|2631389|在GridView内部，还有另一个ModalPopup和TextBox。别理那事。只有这样，用户才能将学生联系人日志中的注释作为另一个弹出窗口查看。|2631390|因此，如果我们现在转到上述两个事件的后面代码：|2631391|protected+void+gvWEFContactLog_Sorted(object+sender,+EventArgs+e)
{
++++GridView+gvWEFCL+=+(GridView)sender;
++++GridViewRow+gvRow+=+(GridViewRow)gvWEFCL.NamingContainer;

++++UpdatePanel+upWEF1+=+(UpdatePanel)gvRow.FindControl("upWEF1");
++++if+(upWEF1+!=+null)+upWEF1.Update();

++++AjaxControlToolkit.ModalPopupExtender+mpeWEF+=+(AjaxControlToolkit.ModalPopupExtender)gvRow.FindControl("mpeWEF");
++++if+(mpeWEF+!=+null)+mpeWEF.Show();
}

protected+void+gvWEFContactLog_PageIndexChanging(object+sender,+GridViewPageEventArgs+e)
{
++++GridView+gvWEFCL+=+(GridView)sender;
++++GridViewRow+gvRow+=+(GridViewRow)gvWEFCL.NamingContainer;

++++UpdatePanel+upWEF1+=+(UpdatePanel)gvRow.FindControl("upWEF1");
++++if+(upWEF1+!=+null)+upWEF1.Update();

++++AjaxControlToolkit.ModalPopupExtender+mpeWEF+=+(AjaxControlToolkit.ModalPopupExtender)gvRow.FindControl("mpeWEF");
++++if+(mpeWEF+!=+null)+mpeWEF.Show();
}|2631392|请注意，我实际上并不控制排序或分页本身。我只是强迫GridView通过更新()调用调用主UpdatePanel+(upWEF1)来刷新自己。下一步是获取我想要保持可见的ModalPopup并重新显示()它！|2631393|这就是一切！|2631394|我确信有一个使用JavaScript本身的更干净的解决方案，但对我来说，这避免了那个可怕的毫无意义的错误，而且我有一组清晰的弹出窗口和更新面板，它们可以处理热链接、排序和分页，就像我希望GridView执行的那样！|2631395|entityMap|0|LINK|mutability|MUTABLE|url|http://www.laboremus.ca/2009/03/ajax-controls-toolkit-modalpopup.html^0|R|3|0|Q|2|T|2|16|D|0|0|8|2|0|0|0|0|F|M|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|1M|8|@$9|1N|A|1O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1P|8|@$9|1Q|A|1R|B|C]|$9|1S|A|1T|B|C]|$9|1U|A|1V|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1W|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1X|8|@]|D|@$9|1Y|A|1Z|1|20]]|E|$]]|$1|L|3|M|5|6|7|21|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|22|8|@]|D|@]|E|$Q|R]]|$1|S|3|T|5|6|7|23|8|@$9|24|A|25|B|C]]|D|@]|E|$]]|$1|U|3|V|5|6|7|26|8|@]|D|@]|E|$]]|$1|W|3|X|5|P|7|27|8|@]|D|@]|E|$Q|R]]|$1|Y|3|Z|5|6|7|28|8|@]|D|@]|E|$]]|$1|10|3|11|5|P|7|29|8|@]|D|@]|E|$Q|R]]|$1|12|3|13|5|6|7|2A|8|@]|D|@]|E|$]]|$1|14|3|15|5|6|7|2B|8|@]|D|@]|E|$]]|$1|16|3|17|5|P|7|2C|8|@]|D|@]|E|$Q|R]]|$1|18|3|19|5|6|7|2D|8|@]|D|@]|E|$]]|$1|1A|3|1B|5|6|7|2E|8|@]|D|@]|E|$]]|$1|1C|3|1D|5|6|7|2F|8|@]|D|@]|E|$]]|$1|1E|3|-4|5|6|7|2G|8|@]|D|@]|E|$]]]|1F|$1G|$5|1H|1I|1J|E|$1K|1L]]]]

Which ever way you want to look at it, the problem is inherit in what I believe is a bug in AJAX.

The only way I was able to resolve this was to control your Sorting or Paging on the server side where you control or more specifically refresh the UpdatePanel along with making sure the ModalPopup has been kept visible!

The reason for the error is really because once you do a sort of page change on a GridView that's inside an UpdatePanel, the controls have been "lost" to the UpdatePanel.

A better explanation is <a href="http://www.laboremus.ca/2009/03/ajax-controls-toolkit-modalpopup.html" rel="nofollow">here</a>.

Here is a column from my GridView...

<pre><code> &lt;asp:GridView ID="gvTETstudents" runat="server" AutoGenerateColumns="False" AllowSorting="True" CellPadding="4" ForeColor="#333333" Font-Size="Small" Width="100%"
 DataSourceID="sdsTETstudents" 
 OnRowCreated="gvTETstudents_RowCreated" 
 OnRowDataBound="gvTETstudents_RowDataBound" 
 OnDataBound="gvTETstudents_DataBound"&gt;
 &lt;Columns&gt;
 ..
 ..
 &lt;ItemTemplate&gt;
 &lt;asp:UpdatePanel ID="upWEF1" runat="server" UpdateMode="Conditional" ChildrenAsTriggers="true"&gt;
 &lt;Triggers&gt;
 &lt;asp:AsyncPostBackTrigger ControlID="btnWEFCLOSE" /&gt;
 &lt;/Triggers&gt;
 &lt;ContentTemplate&gt;
...
...
 &lt;asp:Panel ID="pnlWEF2" runat="server" style="display:none;"&gt;
 &lt;table&gt;&lt;tr&gt;&lt;td&gt;
 &lt;asp:Button ID="btnWEFshow" runat="server" 
 Text="ALL" 
 Font-Size="Small" Font-Names="Arial" 
 ToolTip="Click here to see all of this student's work experience feedback on file" /&gt;
 &lt;ajaxToolkit:ModalPopupExtender ID="mpeWEF" runat="server"
 BackgroundCssClass="modalBackground"
 OkControlID="btnWEFCLOSE"
 PopupControlID="upWEF2"
 TargetControlID="btnWEFshow"&gt;
 &lt;/ajaxToolkit:ModalPopupExtender&gt;
 &lt;asp:UpdatePanel ID="upWEF2" runat="server" UpdateMode="Conditional"&gt;
 &lt;ContentTemplate&gt;
 &lt;asp:Panel ID="pnlWEF3" runat="server" CssClass="pnlEndorsed"&gt;
 &lt;div id="Hdr" style="text-align: center"&gt;
 &lt;asp:Label ID="lblWEFHdr" runat="server"&gt;** CONTACT LOG **&lt;/asp:Label&gt;
 &lt;/div&gt;
 &lt;div id="Bdy"&gt;
 &lt;table style="width:100%"&gt;&lt;tr&gt;&lt;td&gt;
 &lt;asp:GridView ID="gvWEFContactLog" runat="server" 
 Font-Size="X-Small" CellPadding="4" ForeColor="#333333" GridLines="None" AllowPaging="true" PageSize="8" AllowSorting="True" AutoGenerateColumns="False" Width="100%" 
 DataKeyNames="StudentContactLogID,Private,ApprenticeContactLogID"
 DataSourceID="sdsWEF"
 OnRowDataBound="gvWEFContactLog_RowDataBound"
 OnPageIndexChanging="gvWEFContactLog_PageIndexChanging" 
 OnSorted="gvWEFContactLog_Sorted"&gt;
 &lt;Columns&gt;
 &lt;asp:TemplateField HeaderText="First Entered" SortExpression="FirstEntered"&gt;
 &lt;ItemTemplate&gt;
 &lt;asp:HiddenField ID="hfWEFStudCLid" runat="server" Value='&lt;%# Eval("StudentContactLogID") %&gt;' /&gt;
 &lt;asp:HiddenField ID="hfWEFAppCLid" runat="server" Value='&lt;%# Eval("ApprenticeContactLogID") %&gt;' /&gt;
 &lt;asp:HiddenField ID="hfPrivate" runat="server" Value='&lt;%# Eval("Private") %&gt;' /&gt;
 &lt;asp:HiddenField ID="hfNotes" runat="server" Value='&lt;%# Eval("ContactNotes") %&gt;' /&gt;
 &lt;asp:LinkButton ID="lnkWEFCLOG" runat="server"
 Text='&lt;%# Eval("FirstEntered","{0:d MMM yyyy HH:mm}") %&gt;'&gt;&lt;/asp:LinkButton&gt;
 &lt;a id="lnkDummy" runat="server" visible=false&gt;&lt;/a&gt;
 &lt;ajaxToolkit:ModalPopupExtender ID="mpeWEFCLOG" runat="server"
 OkControlID="btnWEFCLOSEview"
 PopupControlID="upWEFCLOG"
 TargetControlID="lnkWEFCLOG"&gt;
 &lt;/ajaxToolkit:ModalPopupExtender&gt;
 &lt;asp:UpdatePanel ID="upWEFCLOG" runat="server" UpdateMode="Conditional"&gt;
 &lt;ContentTemplate&gt;
 &lt;div id="pnlWEFCLOG" runat="server" class="pnlCLOG"&gt;
 &lt;asp:TextBox ID="txtWEFCLOG" runat="server" 
 Wrap="true" 
 TextMode="MultiLine"
 Rows="10" 
 ReadOnly="true"
 Width="98%"&gt;
 &lt;/asp:TextBox&gt;
 &lt;br /&gt;
 &lt;asp:Button ID="btnWEFCLOSEview" runat="server" Text="OK" Width="100%" /&gt;
 &lt;/div&gt;
 &lt;/ContentTemplate&gt;
 &lt;/asp:UpdatePanel&gt;
 &lt;/ItemTemplate&gt;
 &lt;/asp:TemplateField&gt;
 &lt;asp:BoundField DataField="Subject" HeaderText="Subject" SortExpression="Subject" /&gt;
 &lt;asp:BoundField Visible="False" DataField="StudentContactLogID" HeaderText="LogID"
 InsertVisible="False" ReadOnly="True" SortExpression="StudentContactLogID"&gt;
 &lt;ItemStyle HorizontalAlign="Center" /&gt;
 &lt;HeaderStyle HorizontalAlign="Center" /&gt;
 &lt;/asp:BoundField&gt;
 &lt;asp:BoundField DataField="StaffName" HeaderText="Staff" ReadOnly="True" SortExpression="StaffName" /&gt;
 &lt;asp:TemplateField HeaderText="Contact Date Time" SortExpression="ContactDateTime"&gt;
 &lt;ItemTemplate&gt;
 &lt;asp:Label ID="Label1" runat="server" Text='&lt;%# Eval("ContactDateTime","{0:d MMM yyyy HH:mm}") %&gt;'&gt;&lt;/asp:Label&gt;
 &lt;/ItemTemplate&gt;
 &lt;/asp:TemplateField&gt;
 &lt;asp:TemplateField HeaderText="Follow-Up Date" SortExpression="FollowUpDate"&gt;
 &lt;ItemTemplate&gt;
 &lt;asp:Label ID="Label2" runat="server" Text='&lt;%# Eval("FollowUpDate","{0:d MMM yyyy}") %&gt;'&gt;&lt;/asp:Label&gt;
 &lt;/ItemTemplate&gt;
 &lt;/asp:TemplateField&gt;
 &lt;asp:BoundField DataField="Private" HeaderText="Private" SortExpression="Private" /&gt;
 &lt;/Columns&gt;
 &lt;EmptyDataTemplate&gt;
 No Current Entries
 &lt;/EmptyDataTemplate&gt;
 &lt;FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /&gt;
 &lt;RowStyle BackColor="#F7F6F3" ForeColor="#333333" /&gt;
 &lt;EditRowStyle BackColor="#999999" /&gt;
 &lt;SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" /&gt;
 &lt;PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" /&gt;
 &lt;HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" /&gt;
 &lt;AlternatingRowStyle BackColor="White" ForeColor="#284775" /&gt;
 &lt;/asp:GridView&gt;
 &lt;asp:SqlDataSource ID="sdsWEF" runat="server" ConnectionString="&lt;%$ ConnectionStrings:ATCNTV1ConnectionString %&gt;"
 SelectCommand="spTETStudentContactLogView" SelectCommandType="StoredProcedure"&gt;
 &lt;SelectParameters&gt;
 &lt;asp:Parameter Name="StudentID" Type="string" /&gt;
 &lt;asp:Parameter Name="WEF" Type="string" DefaultValue="%" /&gt;
 &lt;/SelectParameters&gt;
 &lt;/asp:SqlDataSource&gt;
 &lt;/td&gt;&lt;/tr&gt;
 &lt;tr style="text-align: center"&gt;
 &lt;td style="text-align: left"&gt;
 &lt;asp:Button ID="btnWEFCLOSE" runat="server" 
 Text="CLOSE" 
 CausesValidation="false" Font-Bold="True" Width="61px" /&gt;
 &lt;/td&gt;
 &lt;/tr&gt;
 &lt;/table&gt;
 &lt;/div&gt;
 &lt;/asp:Panel&gt;
 &lt;/ContentTemplate&gt;
 &lt;/asp:UpdatePanel&gt;
 &lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;
 &lt;/asp:Panel&gt;
 &lt;/ContentTemplate&gt;
 &lt;/asp:UpdatePanel&gt;
 &lt;/ItemTemplate&gt;
</code></pre>

The major point of the code above is that I have a very deep GridView inside an UpdatePanel that's inside a ModalPopUp.

Now look at what I have inside that GridView:

<pre><code>OnPageIndexChanging
</code></pre>

and

<pre><code>OnSorted
</code></pre>

Inside the GridView, there is another ModalPopup and TextBox. Ignore that. That's only so the user can see the comments from the student's contact log as another popup window.

So if we now go to the code behind for the above two events:

<pre><code>protected void gvWEFContactLog_Sorted(object sender, EventArgs e)
{
 GridView gvWEFCL = (GridView)sender;
 GridViewRow gvRow = (GridViewRow)gvWEFCL.NamingContainer;

 UpdatePanel upWEF1 = (UpdatePanel)gvRow.FindControl("upWEF1");
 if (upWEF1 != null) upWEF1.Update();

 AjaxControlToolkit.ModalPopupExtender mpeWEF = (AjaxControlToolkit.ModalPopupExtender)gvRow.FindControl("mpeWEF");
 if (mpeWEF != null) mpeWEF.Show();
}

protected void gvWEFContactLog_PageIndexChanging(object sender, GridViewPageEventArgs e)
{
 GridView gvWEFCL = (GridView)sender;
 GridViewRow gvRow = (GridViewRow)gvWEFCL.NamingContainer;

 UpdatePanel upWEF1 = (UpdatePanel)gvRow.FindControl("upWEF1");
 if (upWEF1 != null) upWEF1.Update();

 AjaxControlToolkit.ModalPopupExtender mpeWEF = (AjaxControlToolkit.ModalPopupExtender)gvRow.FindControl("mpeWEF");
 if (mpeWEF != null) mpeWEF.Show();
}
</code></pre>

Notice that I am not actually controlling the sorting or the paging itself. I am only forcing the GridView to call upon the main UpdatePanel (upWEF1) to refresh itself via an Update() call. The next step is to grab the ModalPopup I want to keep visible and re-Show() it!

And that's all there is to it!

I am sure there is a cleaner solution using JavaScript itself, but for me this avoids that dread meaningless error and I have a clean set of popups and update panels that can handle both hotlinks, sorting and paging as I want the GridView to perform!

I am facing little issue in my web application in asp.net.
i am receiving the below error :

Error: Sys.InvalidOperationException: Handler was not added through the Sys.UI.DomEvent.addHandler method.

I have used Updatepanel and this error occurs when i try to do some 2-3 actions very quickly.
and when next time i try to do take some action my web application just hungs up.
Please suggest.
Thanks

DomEvent. AddHandler

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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在asp.net的web应用程序中，我面临着一些小问题。我收到以下错误：错误: Sys.InvalidOperationException:处理程序不是通过Sys.UI.DomEvent.addHandler方法添加的.我已经使用了Updatepanel，当我尝试快速执行2-3操作时，这个错误就会发生。当我下一次尝试采取一些行动时，我的web应用程序就会被困住。请建议一下。谢谢

问DomEvent。AddHandler
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