asp.net4.5 práctica ~ test4-2

webform1.aspx

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm1.aspx.cs" Inherits="test4_2.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></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        用户名：<asp:TextBox ID="txtName" runat="server" AutoPostBack="True" OnTextChanged="txtName_TextChanged"></asp:TextBox>
       <asp:Label ID="lblValidate" runat="server"></asp:Label><br />
        密码：<asp:TextBox ID="txtPassword" runat="server" TextMode="Password"></asp:TextBox><br />
        E-mail:<asp:TextBox ID="txtMail" runat="server" TextMode="Email"></asp:TextBox><br />
        <asp:Button ID="btnSubmit" runat="server" Text="确认" />
    </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 test4_2
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            txtName.Focus();
        }

        protected void txtName_TextChanged(object sender, EventArgs e)
        {
            if (txtName.Text == "admin")
            {
                lblValidate.Text = "此用户已存在";
            }
            else
            {
                lblValidate.Text = "用户名可用";
            }
        }
    }
}

asp.net4.5 práctica ~ test4-2

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