vs 基本验证控件使用

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="ASP.Default" %>
 
<!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></title>
         <script>
             function validateLength(oSrc, args) {
                 args.IsValid = (args.Value.length >= 8);
                 //如果args.IsValid=false,那么服务器将不会执行button的任何操作.
             }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    <h5>登录</h5>
    RequiredFieldValidator：非空验证
    <hr />
        <br />
    重要的属性：<br />
    1,ControlToValidate：要验证的控件<br />
    2,ErrorMessage：错误提示信息<br />
&nbsp;<hr />
    用户账号：<asp:TextBox ID="txtUsername" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" 
            ControlToValidate="txtUsername" ErrorMessage="请输入用户名"></asp:RequiredFieldValidator>
        <br />
                密&nbsp;&nbsp;&nbsp;&nbsp;码：<asp:TextBox ID="txtUserpass" 
            runat="server" TextMode="Password"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
            ControlToValidate="txtUserpass" ErrorMessage="请输入密码"></asp:RequiredFieldValidator>
        <br />
&nbsp;&nbsp;
        <asp:Button ID="btnSubmit" runat="server" Text="登录" />
        <br />
    </div>
        <div>
    <h2>CompareValidator:比较验证</h2>
    <hr />
    属性：<br />
    ControlToValidate：要验证的控件ID<br />
    ErrorMessage：错误提示信息<br />
    ControlToCompare：与此相比的控件ID<br />
    Operator：操作类型<br />
    <pre>
     1，Equal：相等
    2，NotEaula：不相等
    3，DataTypeCheck：数据类型验证
    4，GreaterThan：大于
    5，GreaterThanEqual：大于等于
    6，LessThan：小于
    7，LessThanEqual：小于等于
    </pre>
    Type：类型<br />
    <pre>
    Integer【整数型】;Date【日期】;Double【双精度浮点型】;String【字符串型】;Currency[货币类型]
    </pre>
    ValueToCompare：比较值
    <hr />
    
        <br />
        Operator=&quot;Equal&quot; Type=&quot;String&quot;<br />
        1，用户注册时，<br />
        密&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 码：<asp:TextBox ID="txtUserpass2" 
            runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator3" runat="server" 
            ControlToValidate="txtUserpass2" ErrorMessage="请输入密码"></asp:RequiredFieldValidator>
        <br />
        重复密码：<asp:TextBox ID="txtUserpass3" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" 
            ControlToValidate="txtUserpass3" Display="Dynamic" ErrorMessage="请输入重复密码"></asp:RequiredFieldValidator>
        <asp:CompareValidator ID="CompareValidator1" runat="server" 
            ControlToCompare="txtUserpass2" ControlToValidate="txtUserpass3" 
            ErrorMessage="重复密码有误" Operator="Equal"
             
            ></asp:CompareValidator>
        <br />
        <br />
        <br />
        Operator=&quot;GeaterThan&quot; Type=&quot;Currency&quot;<br />
        2，请输入您应付金额：<asp:TextBox ID="txtMoney" runat="server"></asp:TextBox>
        <asp:CompareValidator ID="CompareValidator2" runat="server" 
            ControlToValidate="txtMoney" ErrorMessage="您输入的金额有误" Operator="GreaterThan" 
            Type="Currency" ValueToCompare="100"></asp:CompareValidator>
        <br />
        <input id="Reset1" type="reset" value="重置" />&nbsp;&nbsp;
        <asp:Button ID="Button1" runat="server" Text="提交" />
        <br />
    
    </div>
        <div>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        
       <asp:CustomValidator ID="csd" runat ="server" ClientValidationFunction ="validateLength" 
           ErrorMessage="长度必须是8位"  ControlToValidate="TextBox1"></asp:CustomValidator>
        <asp:Button ID="Button2" runat="server" Text="Button" />
        </div>
    </form>
</body>
</html>
再三须慎意，第一莫欺心