前言：
本示例大概功能是前臺通過JQuery的Ajax調用一般處理程序(Handler)，獲取表格需要顯示的信息，然后轉換成json格式返回給前臺，前臺獲取到數據后循環構建表格的行，最好把行附加到表里。
目標：
a 熟悉簡單JQuery Ajax的使用
b 了解如何構造基本的Json格式的數據（構建Json也可以通過第三方的dll）
c 熟悉下handler的基本用法
1 簡單效果圖
2 前臺代碼
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="DialogAjax.aspx.cs" Inherits="JQueryTest_DialogAjax" %><!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 runat="server"> <title></title> <link href="../JQueryUi/jquery-ui-1.8.5.custom.css" rel="stylesheet" type="text/css" /> <script src="../JQueryUi/jquery-1.4.2.min.js" type="text/javascript"></script> <script src="../JQueryUi/jquery-ui-1.8.5.custom.min.js" type="text/javascript"></script> <style type="text/css"> #divTb { width:800px; border:1px solid #aaa; margin:0 auto; } .even{background:#CCCCCC;} .odd{background:#FFFFFF;} </style> <script type="text/javascript"> //獲取發布模塊類型 function getModuleInfo() { $.ajax({ type: "GET", dataType: "json", url: "../Handler/TestHandler.ashx?Method=GetModuleInfo", //data: { id: id, name: name }, success: function(json) { var typeData = json.Module; $.each(typeData, function(i, n) { var tbBody = "" var trColor; if (i % 2 == 0) { trColor = "even"; } else { trColor = "odd"; } tbBody += "<tr class='" + trColor + "'><td>" + n.ModuleNum + "</td>" + "<td>" + n.ModuleName + "</td>" + "<td>" + n.ModuleDes + "</td></tr>"; $("#myTb").append(tbBody); }); }, error: function(json) { alert("加載失敗"); } }); } $(function() { getModuleInfo(); }); </script></head><body> <form id="form1" runat="server"> <div id="divTb"> <table id="myTb" style=" width:100%"> </table> </div> </form></body></html>3 Handler代碼
<%@ WebHandler Language="C#" Class="TestHandler" %>using System;using System.Web;using System.Collections.Generic;using System.Text;using DataDAL;using DataEnity;public class TestHandler : IHttpHandler { HttpRequest Request; HttpResponse Response; public void ProcessRequest (HttpContext context) { //不讓瀏覽器緩存 context.Response.Buffer = true; context.Response.ExpiresAbsolute = DateTime.Now.AddDays(-1); context.Response.AddHeader("pragma", "no-cache"); context.Response.AddHeader("cache-control", ""); context.Response.CacheControl = "no-cache"; context.Response.ContentType = "text/plain"; Request = context.Request; Response = context.Response; string method = Request["Method"].ToString(); System.Reflection.MethodInfo methodInfo = this.GetType().GetMethod(method); methodInfo.Invoke(this, null); } public void GetModuleInfo() { StringBuilder sb = new StringBuilder(); string jsonData = string.Empty; List<Module> lsModule = ModuleDAL.GetModuleList(); sb.Append("{/"Module/":["); for (int i = 0; i < lsModule.Count; i++) { jsonData = "{/"ModuleNum/":" + "/"" + lsModule[i].ModuleNum + "/"" + ",/"ModuleName/":" + "/"" + lsModule[i].ModuleName + "/"" + ",/"ModuleDes/":" + "/"" + lsModule[i].ModuleDes + "/"" + "},"; sb.Append(jsonData); } if (lsModule.Count > 0) sb = sb.Remove(sb.Length - 1, 1); sb.Append("]}"); Response.Write(sb); } public bool IsReusable { get { return false; } }}
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