Question

I have a form that requires a file to be uploaded as well as additional data (name, etc…) with validation on these fields. When an error occurs, the file has to be re-uploaded. Is there a way to keep the file after a validation error occurs? This is built in C# .NET.

Tried to google this but nothing helpful came up.

Thanks in advance!

Answer 1

You can’t genually persist the file because of Security Purpose..
If page is posted and validation error occured, check for a file using the .PostedFile property, and if one exists, save it to a temp file. In Session, store a reference to the temporary file. (use javascript)

.PostedFile is a property of the FileUpload control.

Also, during my google research, I found AJAX RadControl related to your question..

http://www.telerik.com/help/aspnet-ajax/asyncupload-persist-uploaded-files.html