Hi all,
I was upgraded the ajaxtoolkits for my existing application because there was a new request to use
AsyncFileUpload from 1.0 to 3.0. Yet, I was thrown by an error Invalid character in a Base-64 string after it had been upgraded.
If I reversed back the upgrade by removing 3.0 from the toolbar follow by replacing AjaxControlToolkit.dll then the problem would not appear.
Anyone has the solution to my problem.
Thanks in advance.
Chia