全速加载中

一般处理程序学习初步——最简单的一般处理程序

代码示例

html部分代码

<!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>计算器</title>
</head>
<body>
<form  action ="hello.ashx" method =post>
<table border="0" cellspacing="0" cellpadding="0" width="100%">
    <tr>
        <td>
        <input type="text" name = "txtNum1" value= "@txtNum1" />
        </td>
        <td>
        +
        </td>
        <td>
        <input type="text" name = "txtNum2" value= "@txtNum2"/>
        </td>
        <td>
        <input type="submit" value = "=">
        </td>
        <td>
        <input type="text" name = "txtSum" value= "@txtSum"/>
        </td>
    </tr>
</table>
<input type="hidden" name ="isPostBack" value="1"/>
</form>
</body>
</html>


aspx代码

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

using System;
using System.Web;

public class hello : IHttpHandler {
    
    public void ProcessRequest (HttpContext context) {
        context.Response.ContentType = "text/html";
        //context.Response.Write("Hello World");
      
       string strPath =  context.Request.MapPath("hello.htm");

       string strHtml = System.IO.File.ReadAllText(strPath);

       
       string  strNum1 =  context.Request.Form["txtNum1"];
       string strNum2 = context.Request.Form["txtNum2"];
       int num1 = 0;
       int num2 = 0;
       int.TryParse(strNum1, out num1);
       int.TryParse(strNum2, out num2);
       int sum = num1 + num2;
       string newStrHtml = "";
       if (string.IsNullOrEmpty(context.Request.Form["isPostBack"]))
       {
           newStrHtml = strHtml.Replace("@txtNum1", "").Replace("@txtNum2", "").Replace("@txtSum", "");
       }
        else
       {
            newStrHtml = strHtml.Replace("@txtNum1", strNum1).Replace("@txtNum2", strNum2).Replace("@txtSum", sum.ToString());
           
       }
      
       context.Response.Write(newStrHtml);

       
    }
 
    public bool IsReusable {
        get {
            return false;
        }
    }

}

　　

posted @ 2012-12-21 19:55  许鸿飞  阅读(390)  评论(0)  编辑  收藏  举报