How to Create Validation in C#?

[raccess]

Hello all, I have a question.

 

Im creating this new site and it requires a form. I am using Visual Web Developer which is working perfectly at the moment, but I can't figure out how to insert validation controls. I have created a form, and so I use a validation control and I get an error when I load the form saying that it cant find a specific DLL file. I assume this means for the Validation controls. I looked at the site and they said that they do not have AJAX, which is what the validation controls are I think.

 

I tried to get around this, but the page would refresh before any scripts could be done. If someone has some good suggestions, please tell me.

 

Thanks,

raccess (ROBLOX Access)