I have posted this in the Web Forms Forum but have not received an answer to the issue. So I am trying again, here.
My ASP.Net VB application was developed using VS 2012 on .NetFramework 4.0.
All of the Expression Validators (Regular, Required Field, etc.) were working as designed when using IE8.
Recently users were upgraded to IE10. and then the Expression validators no longer worked.
After some research I found that there was some sort of an incompatiblity problem with .net framework 4.0, VS and IE10... something to the effect that MS did not recognize browsers above IE8; but I also read that the problem was fixed with VS 2013 and .NetFramework
4.5
My system was recently upgraded to the above configuration. As instructed, I moved my 4.0 framework Solution and directory of files into the Visual Studio 2013/Projects Directory folder and opened the Solution from VS2013.
I opened the files with the Expression Validators ...
Go to the complete details ...