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Callback has failed

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FileExplorer
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Fit2Page
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Fit2Page asked on 17 Oct 2012, 09:55 AM
What can be the cause of the alert "Callback has failed" when opening the contents of a folder in the FileExplorer?
This only happens for certain subfolders in a setup.

Marc

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Vessy
Telerik team
answered on 17 Oct 2012, 03:45 PM
Hi Marc,

Could you check if you have enough permissions on these specific subfolders which are causing the error? Please, refer the following help article for more information on the subject: Troubleshooting.

In addition, could you try to overwrite the FileList's _onErrorCallback() function and try to debug the actual error returned from the server, e.g.:
Telerik.Web.UI.RadFileExplorer.FileList.prototype._onErrorCallback = function(response, context){ debugger; }


Kind regards,
Vesi
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Fit2Page
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answered on 18 Oct 2012, 06:35 AM
Hi Vesi,

How must this onErrorCallback be implemented in code?
I cannot find it...

Marc
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Vessy
Telerik team
answered on 18 Oct 2012, 02:30 PM
Hi Marc,

The override of the  _onErrorCallback() function has to be placed inside the <script> tag, at the end of the form:
    ...
    <script type="text/javascript">
        Telerik.Web.UI.RadFileExplorer.FileList.prototype._onErrorCallback = function(response, context){ debugger; }
    <\script>
<\form>

Kind regards,
Vesi
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Fit2Page
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answered on 19 Oct 2012, 12:42 PM
Hi Vesi,

I just solved the problem.
The error was raised due to an error in the custom IHttpHandler that I created to generate thumbnails.
Some images properties (width and height) could not be read, probably due to corrupt image files.

Thanks for your time.

Marc
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Tomasz
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answered on 24 Sep 2013, 08:14 PM
Hello there.
This is my first post here so be easy if any formating is done wrong.

Just to make it clear: The namespace of FileList is now Telerik.Web.UI.FileExplorer.FileList

So if anyone stuggles with finding the right namespace here it is ;)

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Vessy
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