RE: Controls not updated by callback event

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Hey Walter,

Thanks for that very good explanation. We are in fact trying to wrap some
AJAX type behaviour in a control and wanted to insulate the consumer of the
wrapper from having to code any javascript.

Looks like that is not possible so we'll be using something similar to what
you have suggested.

Thanks again!

Dave

""Walter Wang [MSFT]"" wrote:

Hi Dave,

Some updates:

<html>
<head>
<title>Test Page</title>

<script language="javascript" type="text/javascript">
function MyControl1OnSuccess(text) {
//alert(text);
document.getElementById("Label1").innerHTML = text;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<custom:MyControl ID="MyControl1" OnMyEvent="Wrapper1_Save"
runat="server" />
<asp:Button ID="Button1" Text="PostBack" runat="server"
OnClick="Button1_Click" />
<asp:Button ID="Button2" Text="CallBack"
OnClientClick="MyControl1Callback('Testing123', null); return false;"
runat="server" />
<asp:Label ID="Label1" runat="server" />
</div>
</form>
</body>
</html>


1) To update the label's content on callback, use DHTML dom elements to
change its content.

2) You need to add "return false" in button2's OnClientClick, otherwise
there's an additional normal postback at the end (which will re-render the
page content according to server-side controls' states -- which means the
label1's content that we changed via script callback will be overwritten
again).


Hope this helps.


Regards,
Walter Wang (wawang@xxxxxxxxxxxxxxxxxxxx, remove 'online.')
Microsoft Online Community Support

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