When I do field validation in Asp.Net MVC, it's generated the following error css classes :
Is there a way that I can change the names of the error classes that are generated?
I use xVal.
I don't know about xVal but as far as the ASP.NET MVC side of things go, if you have a look at the source you'll see there are some static readonly strings that represent these values.
public static readonly string ValidationInputCssClassName = "input-validation-error";
public static readonly string ValidationMessageCssClassName = "field-validation-error";
public static readonly string ValidationSummaryCssClassName = "validation-summary-errors";
So either you edit the source to your liking (which may also fix xVal) or alter the outputting code to use different values somehow.
If xVal is using jQuery Validation (which I think it does...?) you could change it's default value for the 'errorClass' option. My answer here could help you along that path.
HTHs,
Charles