使用一般处理程序让 文本框 在原有的值上加一

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Text;
 6 
 7 namespace _01让文本框加1
 8 {
 9     /// <summary>
10     /// AddOne 的摘要说明
11     /// </summary>
12     public class AddOne : IHttpHandler
13     {
14 
15         public void ProcessRequest(HttpContext context)
16         {
17             context.Response.ContentType = "text/html";
18             int num = 0;
19             if (context.Request["num"] != null)
20             {
21                 num =int.Parse(context.Request["num"]) + 1;
22             }
23             StringBuilder sb = new StringBuilder();
24             sb.AppendLine("<form method=‘get‘>");
25             sb.AppendLine("<input type=‘text‘ name=‘num‘ value=" + num + ">");
26             sb.AppendLine("<input type=‘submit‘ value = ‘AddOne‘>");
27             sb.AppendLine("</form>");
28             context.Response.Write(sb.ToString());
29         }
30 
31         public bool IsReusable
32         {
33             get
34             {
35                 return false;
36             }
37         }
38     }
39 }