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 ...

I hope I can explain this clearly. I've got a user control that is dynamically loaded into an ASPX page. The control has validators on it that verify various fields. When the submit button is clicked, ...

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 ...

The goal of the IClientValidatable interface is to let you extend your server-side DataAnnotations with client-side functions in ASP.NET MVC 3. For instance, a Data Annotation that ensured that a ...

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

When working with applications in ASP.NET Core 6 you will often want to validate your models to ensure that the data they contain conform to the pre-defined validation rules. Enter model validation.