In this post, I will demonstrate how to make your own model validation attributes in order to share common validations throughout an ASP.NET MVC application, and which support MVC 2's client-side validation feature. Validating a ZIP Code As an example, consider a model for an address. public class EditModel { public Guid Id { get; set; } public string Address1 { get; set; } public string Address2 { get; set; } public string City { get; set; } public string State { ...

For a project I'm currently working on, I have a need to add some JavaScript at the end of a page in an ASP.NET MVC application. Since this is part of what Html.EnableClientValidation does, I thought that I would check out that source code to see if there was any kind of generalized mechanism for this. No such luck, I'm afraid. But I did learn a bit more about how Html.EnableClientValidation works, so I thought I might write that down in case it turned out to be useful someday. The Html.Enabl...

While doing some bug fixing and cleanup in a web application, I had the chance to go a little deeper into the jQuery user input validation framework. There are many tutorials available about implementing custom validations. But what I wanted to do was to extend the default validations with my own code, while preserving the existing functionality, and to do it site-wide. So let's pretend that I'd like to extend the default "required" validation in such a way that you are not allowed to enter "...