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I am implementing progress bar functionality to file upload control, I’ve noticed is that going into any event handler after browsing to a large file, takes a long time, even if the handler’s code has nothing to do with the upload. I’m not really sure how the FileUpload control works, but it seems as if some copying is going on before it even gets to my handler.
Can anybody explain me what is happening there and how can i reduce the sending time of post request.
You can’t use a FileUpload control for what you want to do. When a user POSTs a file, you have to think of it like a querystring parameter. It goes as one Http Request. If you want to do a progress bar you’ll want to look into something that can interact with the server asynchronously.