AJAX :: Asyncfileuploader Uploads Twice?
Oct 29, 2010
I'm hoping that somebody cleverer than I am can explain what's happening with my file uploading and how to improve it.My website is used by vets to submit photographs of tumours in horses for examination by another vet and so it's important that the pictures uploaded are high quality, and therefore the file size is large. Since they might be uploading details of several tumours at a time with several photos of each uploading times can be very long.
I accept that upload speeds are generally slower than download speeds and I have put notes on the page to advise the user to be patient while the images upload. However, I've noticed when using Google Chrome, which displays a percentage-complete in the status bar when files are being uploaded that what seems to happen is that when the user selects a picture from the asyncfileupload control it then slowly counts to 100% as the image is uploaded. But when they then click on the 'Save' button which is when code-behind uploads the file to the web server and writes an entry in the database it again counts to 100% at the same, slow speed.
It's as if the file is being uploaded twice. It's as if the file is being uploaded twice, but I've only coded it to happen once, when the 'Save' button is pressed. The first upload must be some part of the way the asyncfileupload control works. So am I using it incorrectly? Should I somehow be using the inbuilt, automated upload to get the image to my server rather than in the code-behind of the 'Save' button?
One other piece of information which may be relevant is that at the point the picture is uploaded by the asyncfileupload control there is no associated record in the database for it to be linked to. When the 'Save' button is clicked a record for that tumour is created first, then then the image(s) is uploaded and an associated record created with the image filename, so using the automated uploading of the asyncfileupload control may not be possible for me as at that point there is no record to link the filename to. If that's the case can I disable it somehow?
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[Code]....
[Code]....
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[Code]....
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[URL]
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