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HomeHomeDNN Open Source...DNN Open Source...Provider and Extension ForumsProvider and Extension ForumsClientAPIClientAPIRegisterPostBackEventHandler ErrorRegisterPostBackEventHandler Error
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5/11/2006 8:14 AM
 
Gjergji Spaho

www.devalbania.com
Joined: 9/6/2004
Posts: 13

I'm  using a user control in my web application and on its Page_Load i'm using the following code

ClientAPI.RegisterPostBackEventHandler(Me, "CaseAssigned", AddressOf CaseAssignedSrv, False)

When i run the app i get the following error

'System.Web.UI.ResourceBasedLiteralControl' does not allow child controls.

If I try Me.Page instead of Me in the first parameter i get another error

A control cannot modify its parents' control collections.

Thanks in advance!
 
New Post
5/11/2006 10:22 AM
 
Jon Henning

www.codeendeavors.com
Joined: 3/20/2003
Posts: 1767

This is caused by the need for the __dnnVariable control to exist on the page.  The ClientAPI is trying to add it at this stage in the page lifecycle and ASP.NET doesn't like it.  I offer some insight into how I am working around this issue in this document (see the OnInit section - page 13).  In it you will see one solution is to add this control to your page.

<input id="__dnnVariable" type="hidden" name="__dnnVariable" runat="server">

If that doesn't work, then I offer another solution as well, though it is a little bit of a hack.

 
 
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5/12/2006 9:26 AM
 
Gjergji Spaho

www.devalbania.com
Joined: 9/6/2004
Posts: 13

I can't find neither ClientAPI.NeedsDNNVariable nor ClientAPI.RegisterDNNVariableControl methods on 3.2.2 version of DotNetNuke.WebUtility

Are this features going to be available only in the next version of DNN?

I already solved this problem by adding on the Page's PageLoad the following code

ClientAPI.RegisterClientVariable(Me, "_temp", "", True)

which i suppose is the same as adding the '__dnnVariable' input control in the page.

Thanks for your response
 
New Post
5/15/2006 9:22 AM
 
Jon Henning

www.codeendeavors.com
Joined: 3/20/2003
Posts: 1767
Yes, those helper functions will be included in 3.3/4.1.  Glad to hear you solved your problem.
 
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