AsyncFileUpload disappears
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AsyncFileUpload disappears when near by asp dropdownlist postbacks, both the controls are inside update panel
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AsyncFileUpload disappears when near by asp dropdownlist postbacks, both the controls are inside update panel
If you mean the file you selected is forgotten and the upload control blanked when the control is part of an updatepanel then that is normal behavior you can't do anything about. You can't default the file that an upload control points to, and when your updatepanel fires your upload is being deleted then recreated, and it can't be recreated to the same state the way a textbox or dropdown can. Move the file upload outside of the update panel as they don't work inside asynch update panels anyway.