ASP.NET Validation Controls

Required Field Validator <asp:requiredfieldvalidator/>

Provides form validation.Properties:    

Id=”img” Runat=”server” ControlToValidate=”FieldID” Display=”Dynamic/Static” Text=”Error Message”

Creates an unique identifier Sets  the image for server side processing Sets the control to be validated Sets the validation space used by the error message Sets the error message

Example: <asp:requiredfieldvalidator runat=”server” ControlToValidate=”CustName” Display=”Dynamic” Text=”Field Required” Font-Name=”verdana” Font-Size=”10”/>