You are designing an ASP.NET Web application that allows users to specify a file to be uploaded by entering the URL of the file.
Only files that contain information in a specific internal metadata field are allowed.
You need to design a solution to reject URLs of disallowed files Which two approaches could you recommend?
(Each correct answer presents a complete solution Choose two )
A. Use an OnClick method
B. Use an on Submit Java Script handler.
C. Use a Regular Expression Validator control.
D. Use a custom validator control.
