Tag Archives: Validate DropDownList in ASP.NET

Validating list controls in ASP.NET using RequiredFieldValidator

RequiredFieldValidator control can be used to validate ASP.NET list controls like DropDownList, ListBox and RadioButtonList so that they cannot be left blank. Users must select a value from these list controls when validation has been applied. To validate a list control, we need to set InitialValue property of the RequiredFieldValidator along with other properties. Let… Read More »