Catching upload error on client side

[chirag]

Hi,

How can I trap/catch an unknown upload failure on client side and display custom error message/feedback to the user?

I'm using RadUpload And RadProgressArea controls. I display progress bars.
I don't have exact error details, but I remember when an upload failed, a huge javascript alert box was displayed with all technical jargons.
I want to catch that and display custom/user-friendly error message to user.

We can assume we are talking about timeout. I know I can set the maxrequestlength and session time limit in web config.

Thanks,
Chirag

[Erjan Gavalji]

Hi chirag,

Unfortunately currently RadUpload does not provide such a possibility. As this seems a nice feature, we will include it for the next official release. Please, open a formal support ticket if you would need an intermittent build and instructions.

Kind regards,
Erjan Gavalji
the Telerik team

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[Loopy]

Hi Erjan,

Do you expect that the update will be able to handle the 404 error when an upload file is larger than the maxrequestlength?

[Erjan Gavalji]

Hi,

Unfortunately the answer is "no". The Max File Size Exceeded (and the Page Not Found error respectively) is thrown at a higher level of the ASP.NET Operation. To my regret RadUpload cannot handle that.

Kind regards,
Erjan Gavalji
the Telerik team

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[Scott]

Just curious how are other users handling upload errors when file exceeds maxrequestlength.  I can't find a way to let users know that they are uploading a file that's larger than allowed.

Please advise on how you're talking care of this issue. Thanks.

[Erjan Gavalji]

Hi Scott,

There are two possible approaches.
The first one is just informative - add a label around the RadUpload instance, which will display the maximum allowed size.
The other approach is to use the client-side file size checking approach. Please note, that the latter depends on the asynchronous progress update Ajax calls and some the data gets uploaded before the client-side event is triggered. That means that on localhost validation might not occur if uploading relatively small files (e.g. <5MB).

You can use both the approaches to make best client experience.

I hope that helps.

Kind regards,
Erjan Gavalji
the Telerik team

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[Scott]

"The first one is just informative - add a label around the RadUpload instance, which will display the maximum allowed size."

I have that label, but some users don't read it or ignore it.  So, they upload a much bigger size, how do I show a friendly error page or message?  When they upload a bigger size than maxrequestlength, it won't even attempt to upload, it simply errors out immediately.

[Veselin Vasilev]

Hi Scott Rupp,

I am afraid we cannot do anything in this case to prevent that error.

Regards,
Veselin Vasilev
the Telerik team

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