Here's how to integrate the ASP.NET CustomValidator control with client-side code to create a page that uses Ajax and server-side code to validate data at the browser. In a comment to a tip in our ...

Take advantage of automatic model state validation in ASP.Net Core to avoid tedious manual coding for HTML form validation When we create applications that accept data from users, we must validate ...

Implementing one of three interfaces can turn your business classes into self-validating components that seamlessly integrate into WPF, Silverlight and ASP.NET MVC applications -- and can be easily ...

Take advantage of base controllers to avoid dependency injection code duplication and enforce the DRY principle in ASP.NET Core MVC. When working with controllers in web applications using ASP.NET ...

<asp:TextBox ID="tbFirstName" runat="server" CausesValidation="true" style="width: 50%;" /> <asp:RequiredFieldValidator ID="rfvFirstName" runat="server ...