webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="work038.WebForm1" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title>范围验证控件</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table>
            <caption>示例1，婚恋交友网</caption>
            <tr>
                <td>生日</td>
                <td>
                    <asp:TextBox ID="txtBirth" runat="server"></asp:TextBox>
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="请填写生日" ControlToValidate="txtBirth"></asp:RequiredFieldValidator>
                    <asp:RangeValidator ID="RangeValidator1" runat="server" ErrorMessage="未成年不能注册" MaximumValue="" MinimumValue="" Type="Date" ControlToValidate="txtBirth"></asp:RangeValidator>
                </td>
            </tr>
        </table>
        <br />
        <br />
        <hr />
        <br />
        <br />
        <table>
            <caption>示例2，填写有效日期</caption>
            <tr>
                <td>日期</td>
                <td>
                    <asp:TextBox ID="txtDate" runat="server"></asp:TextBox>
                    <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ErrorMessage="日期不能为空" ControlToValidate="txtDate"></asp:RequiredFieldValidator>
                    <asp:RangeValidator ID="RangeValidator2" runat="server" ErrorMessage="日期格式错误" MaximumValue="9999-12-31" MinimumValue="0001-01-01" Type="Date" ControlToValidate="txtDate"></asp:RangeValidator>
                </td>
            </tr>
        </table>
        <asp:Button ID="Button1" runat="server" Text="Button" />
    </div>
    </form>
</body>
</html>

webform1.aspx.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace work038
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Page.UnobtrusiveValidationMode = System.Web.UI.UnobtrusiveValidationMode.None;

            DateTime minTime = DateTime.Now.AddYears(-50);
            DateTime maxTime = DateTime.Now.AddYears(-18);
            RangeValidator1.MinimumValue = minTime.ToString("yyyy-MM-dd");
            RangeValidator1.MaximumValue = maxTime.ToString("yyyy-MM-dd");
        }
    }
}