The TextBoxWatermark control in the AJAX Control Toolkit extends a text box so that a text is displayed within the box. When a user clicks into the box, it is emptied. If the user leaves the box ...

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 ...

SO I have a data driven page which has both add and edit elements, which have their own validation controls. <BR><BR>What is a good strategy or technique(or is there some master control I'm missing, ...

In this tutorial we'll see how easy it is to add validation controls to the DataList's EditItemTemplate in order to provide a more foolproof editing user interface. In the DataList editing tutorials ...

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 ...

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

Take advantage of the FluentValidation open-source library to validate data in your ASP.NET Core application and keep your code clean, organized, and maintainable. To preserve the integrity, ...

M.Sc. C.S. University of Belgrade, Serbia; MCSA – Microsoft Certified Solutions Associate (C#, ASP.NET MVC); CodeProject MVP (x2 years); C#-Corner MVP (x3 years ...