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第十节 10作业点评加法计算器

2012-03-18 23:41 211 查看 
<!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 method="post" action="AddNumber.ashx">
<input type="hidden" name="ispostback" value="true" />
<input type="text" name="number1" value="@number1" /> + <input type="text" name="number2" value="@number2" />
<input type="submit" value="=" name="submit" />
<input type="text" name="result" value="@result">
</form>

</body>
</html>




　　

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

using System;
using System.Web;

public class AddNumber : IHttpHandler {

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

string ispostback = context.Request["ispostback"];
string number1 = context.Request["number1"];
string number2 = context.Request["number2"];
int result = 0;
if (ispostback == "true")
{
result = Convert.ToInt32(number1) + Convert.ToInt32(number2);
}
else {
result = 0;
number1 = "0";
number2 = "0";
}
string filepath = context.Server.MapPath("AddNumber.htm");
string content = System.IO.File.ReadAllText(filepath);
content = content.Replace("@number1", number1);
content = content.Replace("@number2", number2);
content = content.Replace("@result", result.ToString());
context.Response.Write(content);

}

public bool IsReusable {
get {
return false;
}
}

}


　　
                                            

                                        

                        
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