UpdatePanel Returns Error When Click On Linkbutton Which Is Inside UpdatePanel

Mar 26, 2010

i have Linkbutton inside updatePanel and when i click on it it returns following error

An extender can't be in a different UpdatePanel than the control it extends

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Dim linkBtn As New LinkButton
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i have set of link buttons outside update panel but when click any one of them they donot work at all , when i set the postbackUrl they make full postback my source code :

<asp:Panel ID="pnl_viewImages" runat="server">
<asp:Label ID="lbl_viewImages" runat="server" style="texalign: left"
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<br />
<br />
<br />
<table cellpadding="0" cellspacing="0" style="width: 100%" class ="Alternating">
<td colspan="5">
<asp:UpdatePanel ID="updatePnl_image" runat="server">
<asp:ListView ID="lv_showImages" runat="server">
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<asp:AsyncPostBackTrigger ControlID="lbtn_last" EventName="Click" />
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<asp:AsyncPostBackTrigger ControlID="lbtn_previous" EventName="Click" />
<asp:AsyncPostBackTrigger ControlID="lbtn_delete" EventName="Click" />
<asp:LinkButton ID="lbtn_first" runat="server" onclick="lbtn_first_Click">first</asp:LinkButton>
<asp:LinkButton ID="lbtn_previous" runat="server" onclick="lbtn_first_Click"><<</asp:LinkButton>
<asp:LinkButton ID="lbtn_next" runat="server" onclick="lbtn_first_Click"
<asp:LinkButton ID="lbtn_last" runat="server" onclick="lbtn_first_Click">last</asp:LinkButton>
<asp:LinkButton ID="lbtn_delete" runat="server" onclick="lbtn_first_Click">delete</asp:LinkButton>
<br />

i tried to remove the table but in vain it does not work also.

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Linkbutton Not Firing RowCommand Gridview UpdatePanel UserControl?

Jun 23, 2010

I have a problem with my Linkbutton which is not firing the RowCommand of my gridview.

Just for an Idea what I am doing is a follows:

1. WebForm

WebForm hosts UserControl_A.

2. UserControl_A = UpdatePanel + Panels + Gridview1 + CollapsiblePanelExtender

Updatepanel of UserControl_A consists of multiple Panels.

Each Panel consists of a Gridview1.

Upon each Panel expand UserControl_B is loaded.

3. UserControl_B = Details View & a couple of Linkbuttons in GridView2

Upon clicking the Linkbutton, unexpectedly it makes a refresh for the entire UserControl_A.

But it does not fire the RowCommand of its parent GridView2.

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UpdatePanel With GridView With LinkButton With Image Causes Full Postback

Apr 20, 2010

So this might be a fairly specific issue but I figured I'd post it since I spent hours struggling with it before I was able to determine the cause.

<asp:GridView ID="gvAttachments" DataKeyNames="UploadedID" AutoGenerateColumns="false" OnSelectedIndexChanged="gvAttachments_SelectedIndexChanged" runat="server">
<EmptyDataTemplate>There are no attachments associated to this email template.</EmptyDataTemplate>
<asp:TemplateField ItemStyle-Width="100%">
<asp:LinkButton CommandName="Select" runat="server"><img src="/images/icons/trashcan.png" style="border: none;" /></asp:LinkButton>

In the ItemTemplate of the TemplateField of the GridView I have a LinkButton with an image inside of it. Normally I do this when I have an image with some text next to it but this time, for whatever reason, I just have the image. This causes the UpdatePanel to always do a full postback.

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AJAX :: GridView Not Refreshing In UpdatePanel After Selecting LinkButton?

Oct 11, 2010

This GridView contains a TemplateField with a LinkButton that displays a text value. When the link button is clicked, the code behind needs to capture the text value of the button, and then refresh the GridView with an asynchronous postback within the UpdatePanel and display the updated output.

The post-back event is occurring, and I'm able to capture the event in Visual Studio 2010 debugger. But, the screen contents do not change after this event occurs. No exception gets thrown, at least from what I can see in debugger.

Portions of the sanitized code appear below. The GridView actually appears on a page that contains 2 dropdown lists and 2 other GridViews. There is just one UpdatePanel on this page.


This is in the Code-Behind.


I can put a break point in the above method, and it is captured when the lnkHostName button is clicked. Stepping through the lnkHostName_Click() method, the ReloadPage() method successfully runs, then executes this method:


This runs successfully, and the DataSet which gets returned contains 1 row of data rather than several rows. This is what I expect to happen. Once the filter is selected in my test case just 1 row should get returned. The problem is that I don't see that output refreshed on the screen. The grdProcesses gridview continues to display the original dataset of several rows, rather than just one row of data. To additionally test this, I tried setting the visibility of grdProcesses to false within this method when the HostName had a value. Again, this ran without an error, but the GridView was still visible. And I also tested by updating the contents of a label with the HostName value. The new value was never displayed in the label. I also tried putting the lnkHostName button into the triggers, ala:


But the following exception gets thrown when that button is added, "A control with ID 'lnkHostName' could not be found for the trigger in UpdatePanel 'upMain'."

What's frustrating is that everything appears to run smoothly in debugger. But in reality the expected output never gets refreshed on the screen. Perhaps I need to use an alternate trigger in the AsyncPostBackTrigger. I'm open to using a command button or some other artifact.

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