This example shows how Telerik Numeric TextBox for ASP.NET MVC is using build-in client validation of the ASP.NET MVC 2.0

Validation of the Model is based on the DataAnnotations. Except, all required actions to enable build-in client validation, important thing is that the numeric input should have the same name as the validated property of the Model. In other words if OrderID is a property of the Model, numeric input should be named "OrderID".

Here is the definition of the OrderID property, which is validated in this demo:

            [Range(1, 10)]
            public int OrderID
            {
                get;
                set;
            }

The [Range(...)] attribute comes from the System.ComponentModel.DataAnnotations.