Sigorta No Doğrulama

RegularExpressionValidator ile girilen sigorta no sunun 111-11-1111  formatında olup olmadığını kontrol eden program..  giriş formatını “\d{3}-\d{2}-\d{4}” bölümü ile belirliyoruz

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RegularExpressionValidator Telefon.aspx.cs" Inherits="aspnetornekleri.WebForm1" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h2 style="color:Navy">RegularExpressionValidator<br />Sigorta No Doğrulama </h2>
<asp:Label
ID="Label1"
runat="server"
>
</asp:Label>
<br /><br />
<asp:Label
ID="Label2"
runat="server"
Text="Sigorta No...:"
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="Geçersiz Sigorta No Tekrar Deneyin"
></asp:RegularExpressionValidator>
<br /><br />
<asp:Button
ID="Button1"
runat="server"
Text="Sigorta No Doğrula"
OnClick="Button1_Click"
/>
</div>
</form>
</body>
</html>
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 = &quot;Girmiş Olduğunuz Sigorta No..: &quot; + TextBox1.Text.ToString();
        }  

RegularExpressionValidator 1