<%@ Page Language="VB" AutoEventWireup="false" CodeFile="Default.aspx.vb" Inherits="_Default" %>
<!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>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:TextBox ID="txtInput" runat="server"></asp:TextBox><br />
<asp:Button ID="btncollect" runat="server" Text="CollectNumber" OnClick="btncollect_Click" /><br />
<asp:Label ID="lblMessage" runat="server"></asp:Label>
</div>
</form>
</body>
</html>
Imports System.Text.RegularExpressions
Partial Class _Default
Inherits System.Web.UI.Page
Protected Sub btncollect_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btncollect.Click
lblMessage.Text = CollectNumbers(txtInput.Text)
End Sub
Public Function CollectNumbers(ByVal collectnum As String) As String
Return String.Join(Nothing, Regex.Split(collectnum, "[^\d]"))
End Function
End Class