各位同行,怎样定义一个Edit控件中只能输入日期格式的字符?初学者

<%@ Page language="c#" Codebehind="zsbDateValidator.aspx.cs" AutoEventWireup="false" Inherits="WebApplication2.zsbDateValidator" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
<HEAD>
<title>zsbDateValidator</title>
<meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
<meta name="CODE_LANGUAGE" Content="C#">
<meta name="vs_defaultClientScript" content="JavaScript">
<meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<br>
<asp:Label id="Label1" runat="server">临时:</asp:Label>
<asp:TextBox id="TextBox1" runat="server"></asp:TextBox><br>
<br>
<asp:Label id="Label2" runat="server">日期:</asp:Label>
<asp:TextBox id="TextBox2" runat="server"></asp:TextBox>
<asp:CompareValidator id="CompareValidator1" runat="server" ErrorMessage="CompareValidator" ControlToValidate="TextBox2"
ValueToCompare="2001-02-12" Operator="DataTypeCheck" Type="Date"></asp:CompareValidator></FONT></form>
</FORM>
</body>
</HTML>