ValidateUSSocialSecurityNumber.aspx
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Page_Load(object sender, System.EventArgs e)
{
if(!this.IsPostBack)
{
Label1.Font.Bold = true;
Label1.Font.Italic = true;
Label1.Font.Size = FontUnit.Large;
Label1.ForeColor = System.Drawing.Color.Crimson;
TextBox1.BackColor = System.Drawing.Color.SlateBlue;
TextBox1.ForeColor = System.Drawing.Color.AliceBlue;
Button1.Font.Bold = true;
Button1.ForeColor = System.Drawing.Color.SlateBlue;
}
}
protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = "Your Social Security Number: " + TextBox1.Text.ToString();
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>asp.net RegularExpressionValidator: how to validate U.S. Social Security Number</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:Navy">RegularExpressionValidator<br /><i>U.S. Social Security Number</i></h2>
<asp:Label
ID="Label1"
runat="server"
>
</asp:Label>
<br /><br />
<asp:Label
ID="Label2"
runat="server"
Text="U.S. Social Security Number"
Font-Bold="true"
ForeColor="SlateBlue"
>
</asp:Label>
<asp:TextBox
ID="TextBox1"
runat="server"
>
</asp:TextBox>
<asp:RequiredFieldValidator
ID="RequiredFieldValidator1"
runat="server"
ControlToValidate="TextBox1"
Text="*"
>
</asp:RequiredFieldValidator>
<asp:RegularExpressionValidator
ID="RegularExpressionValidator1"
runat="server"
ValidationExpression="\d{3}-\d{2}-\d{4}"
ControlToValidate="TextBox1"
ErrorMessage="Input valid U.S. Social Security Number!"
></asp:RegularExpressionValidator>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
Text="Submit U.S. Social Security Number"
OnClick="Button1_Click"
/>
</div>
</form>
</body>
</html>
