第十节 5ASP.Net的IsPostBack揭秘

最新推荐文章于 2025-09-10 22:30:18 发布

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最新推荐文章于 2025-09-10 22:30:18 发布

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文章标签： xhtml c#

<%@ WebHandler Language="C#" Class="IsPostBack" %>

using System;
using System.Web;

public class IsPostBack : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/html";
        //context.Response.Write("Hello World");

        string ispostback = context.Request["ispostback"];
        string username = context.Request["username"];
        if (ispostback == "true")
        {
            context.Response.Write("提交进入");
        }
        else
        {
            context.Response.Write("直接进入");
        }
        string fillpath = context.Server.MapPath("IsPostBack.htm");
        string content = System.IO.File.ReadAllText(fillpath);
        content = content.Replace("@username",username);
        
        context.Response.Write(content);
        
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}

<!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>
    <title></title>
</head>
<body>

<form action="IsPostBack.ashx" method="post">
<input type="hidden" value="true" name="ispostback"/>
<input type="text" name="username" value="@username" />
<input type="submit" value="提交" />

</form>
</body>
</html>

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