Returning Messages from Server

[Josh]

I would like to return an error or status message from the server after a file is uploaded and processed based on the contents of the file.  Is there a way to send a message back to the onClientFileUploaded event handler without extending a custom handler for each upload control I want on my website?

[Peter Milchev]

Hello Josh,

Sending custom messages from the server requires a Custom Handler for the AsyncUpload - AsyncUpload - Custom Http Handler online demo.

If you want to set the handler for all AsyncUpload controls, there are some approaches for achieving it: 

• Wrapping the AsyncUpload in a UserControl.
• Using ASP.NET Themes (similar implementation is used for the RadEditor demos, the Skin implementation can be found in the /App_Themes/Default folder of the Local demos);
• Inheriting the AsyncUpload control;
• Using a ControlAdapter;  

Regards, Peter Milchev
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[Josh]

That's not quite what I was going for.  My scenario is that I have several pages that each have an upload control that all process different files in different ways.  Some of them return messages, some don't.  Is there a way to return messages without having to write a separate upload module for each process?

[Peter Milchev]

Hello Josh,

I am afraid that returning messages from the server requires Custom Handler and you should implement it to achieve the desired functionality. 

Regards,
Peter Milchev
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