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Intermittent problem with Telerik RadUpload File Attachment control in I.E.

web-app

Our installation: Gemini 3.1.1

We have found that on some workstations, the "Select" buttons for file attachment (Attachments tab) do not always work when using I.E.  Clicking the buttons does not always fire the event to bring up the file selection dialog.

I have been able to recreate this problem on multiple machines.  On some, such as a Vista 64 bit, IE 7, the problem happens perhaps only 10% of the time.  That is no big deal -- just click again.  On others, however, the selection dialog fails to launch 90% of the time.  That is very frustrating.  That machine has XP, SP2 and I.E. 6.0.   The problem is made worse when there are "focus" changes.  For example, click on the checkbox, then Select -- it is much less likely to work.

I found this posting on the Telerik website that sounds like it is related:
http://www.telerik.com/community/forums/aspnet/upload/r-a-d-upload-problem-in-ie.aspx

So, is the EnableFileInputSkinning for the ReadUpload control set to true?  If so, where/how can this be changed?

Any other suggestion how I can eliminate this problem?

(BTW, Firefox does not appear to have this issue, but that is not an option for all of our users.  Also the single file attachment option on the Description page always works.)

 
acasey
· 1 		acasey
Wednesday, March 18, 2009, 4:55:32 PM
Replies (7)
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Can you please try and amend the IssueAttachmentsUC.ascx file (under the issue\controls directory)?

Put the EnableFileInputSkinning="true" in the radupload1 tag.
Saar Cohen
· 5000 		Saar Cohen
Wednesday, March 18, 2009, 8:21:31 PM
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Thanks for the quick response.  Unfortunately, that did not fix the problem.  I did validate that the file I changed with your suggestion is being used by changing the file count from 3 to 5.   In the app, I now see 5 file upload controls, but the Select button still does not consistently work in I.E.

While testing, I did uncover a little more insight to what triggers the problem.  For the "Select" button (and ONLY that button class), if the user click is slow (i.e., push down on the left mouse, pause briefly, and release), that is when the file selection dialog does not appear.    This happens in both XP and Vista (both i.e 7 in this case), but is much worse in XP.   Very odd!   For Firefox, it does not matter how slow the click is. 

Any other ideas?
acasey
· 1 		acasey
Wednesday, March 18, 2009, 8:56:00 PM
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We will raise this with Telerik, the makers of the contorl and let you know if there is a workaround ASAP.
Saar Cohen
· 5000 		Saar Cohen
Wednesday, March 18, 2009, 9:02:24 PM
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Can you please try the Telerik demo: http://demos.telerik.com/aspnet-ajax/upload/examples/usingtargetfolder/defaultcs.aspx?
Saar Cohen
· 5000 		Saar Cohen
Friday, March 20, 2009, 9:36:34 PM
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Confirmed: The problem also occurs on Telerik's demo site.

On a Windows XP Pro, SP3 machine with I.E. 7 and 512 MB it is particularly bad.  If there is the slightest pause (I'm talking a fraction of a second) where the mouse button is held down during the click, the "Choose File" dialog does not appear. 


acasey
· 1 		acasey
Friday, March 20, 2009, 10:01:24 PM
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Can you please confirm the exact URL that you have used on the Telerik site?
Saar Cohen
· 5000 		Saar Cohen
Monday, March 23, 2009, 9:09:39 PM
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The URL I tested was the exact one from the earlier post:

http://demos.telerik.com/aspnet-ajax/upload/examples/usingtargetfolder/defaultcs.aspx

We have tried this on several machines.   In general, Vista (IE 7) rarely has a problem, but all the XP boxes we tested (IE 6 or 7) are affected by click speed -- any "slow" click on "Select" button does not show the File Selection screen.   


acasey
· 1 		acasey
Monday, March 23, 2009, 9:29:50 PM