how to add required field validator to upload button

  •  01-05-2009, 8:07 AM

    how to add required field validator to upload button

    hi
    I need to add compulsory required field validation to file upload control . so that form should be submitted when the user has uploaded some file.
     
    in simple words, if i have 4 fields in my form along wth the uploader component, while filling the form i want that user must select some file using upload button. else it should show up a message "Please select to file to upload".
     
     
    thanks.
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