Callback has failed

[Fit2Page]

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

[Vessy]

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
the Telerik team

[Fit2Page]

Hi Vesi,

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

Marc


[Vessy]

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
the Telerik team

[Fit2Page]

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

[Tomasz]

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 ;)