Hi Mark,
I am afraid that we cannot detect the problem without reproducing the issue. I have examined the provided code but everything seems to be defined properly. Nevertheless, I could think of some possible reasons for such a behavior:
- Does the issue happens on random users, or it is repeatedly observed with the same users, using the same directories? If one user experiences a problem when trying to open a specific folder, is that folder available for other users, or opening this folder is problematic all the time?
- Could you, please, verify, that the folder which the ImageManager is trying to load actually exists and the current user has the correct permissions to access it? There is additional information on how to check the users' permissions available in the following help article: Troubleshooting.
- If it exists and user has permissions for it, but regardless of that the ImageManager's dialog is not rendered correctly, you could try to reload it, setting the ReloadOnShow property of the dialog to true. It could be done both client-side or server-side:
Or you could set it in the code behind, where you could access the ImageManager (with no need to apply the following setting for all dialogs):
Additionally, my suggestion is to upgrade to version 2012.2.912.40 of RadControls, which is the latest official Service Pack of the controls, instead of upgrading to 2012.2.815.40.
Regards,
Vesi
the Telerik team
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