Validate-input-of-US-SSN

                           runat="server"
                   Font-Bold="True"
                   Font-Size="Large"
                   Text="ASP.NET Validators"/>
                           runat="server"
                   Font-Bold="True"
                   Text="Required Field:"/>
                             runat="server">Name
                                            runat="server"
                                    ControlToValidate="txtRequiredField"
                                    ErrorMessage="No data."
                                    InitialValue="Please enter your name"/>
                           runat="server"
                   Font-Bold="True"
                   Text="Range 0 - 100:"/>

                                    runat="server"
                            ControlToValidate="txtRange"
                            ErrorMessage="Should be between 0 and 100."
                            MaximumValue="100"
                            MinimumValue="0"
                            Type="Integer"/>
                             runat="server"
                    Font-Bold="True"
                    Text="Regular Expression:"/>

                             ID="RegularExpressionValidator1"
                    runat="server"
                    ControlToValidate="txtRegExp"
                    ErrorMessage="Please enter a valid US SSN."
                    ValidationExpression="\d{3}-\d{2}-\d{4}"/>
                             runat="server"
                    Font-Bold="True"
                    Text="Value < 20"/>

                             ID="CompareValidator1"
                    runat="server"
                    ControlToValidate="txtComparison"
                    ErrorMessage="Enter a value less than 20."
                    Operator="LessThan"
                    ValueToCompare="20"/>

Validation By Control ASP.Net