asp.net如何在前台利用jquery Ajax调用后台方法

一 :最近因为帮同事开发项目使用到了asp.net,而我又想实现Ajax异步请求....从网上查询了一下资料之后,原来在asp.net中利用Ajax调用后台方法同样很简单,为了便于自己以后查看,特将此整理后记录如下

先贴上前台代码如下:

  1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Index.aspx.cs" Inherits="aspnetAjax.Index" %>
  2 
  3 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
  4 <html xmlns="http://www.w3.org/1999/xhtml">
  5 <head runat="server">
  6     <title>
  7         <%=Title %></title>
  8     <script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
  9     <style type="text/css">
 10         td
 11         {
 12             text-align: center;
 13         }
 14     </style>
 15     <script type="text/javascript">
 16         $(function () {
 17             $("#but").attr("disabled", false);
 18         });
 19         //(全/反)选:
 20         function getChk() {
 21             if ($("#ch").attr("checked")) {
 22                 $(".chk").attr("checked", true);
 23             } else {
 24             $(".chk").attr("checked",false);
 25             }
 26         }
 27         //利用AJAX将数据发送到后台并判断数据选中情况方法:
 28         function sendData() {
 29             var sendValue = "";
 30             $(".chk").each(function (i,chk) {
 31                 if (chk.checked) {
 32                     sendValue += $.trim($(chk).parent().parent().find(".getData").text());
 33                     sendValue += ",";
 34                 }
 35             })
 36             if (sendValue.length == 0) {
 37                 alert("请选择需要传输的数据!!");
 38                 return;
 39             }
 40             sendValue = sendValue.substr(0, sendValue.length - 1);
 41             //开始ajax to asp.net:
 42             $.ajax({
 43                 type: "post",
 44                 contentType: "application/json",
 45                 url: "Index.aspx/GetAjaxValue",
 46                 data: "{sendValue:'" + sendValue + "'}",
 47                 beforeSend: function () {
 48                     $("#but").attr("disabled", true);
 49                 },
 50                 success: function (data) {
 51                     alert(data.d);
 52                 }, complete: function () { }, error: function () { }
 53             })
 54         }
 55     </script>
 56 </head>
 57 <body>
 58     <form id="form1" runat="server">
 59     <div>
 60         <table width="400px"; border="1px solid blue" cellpadding="0px" cellspacing="0px" style="border-color: Green; text-align:center">
 61             <tr>
 62                 <th>
 63                     全选<input type="checkbox" id="ch" onclick="getChk()" />
 64                 </th>
 65                 <th>
 66                     数据
 67                 </th>
 68             </tr>
 69             <tr>
 70                 <td>
 71                     <input type="checkbox" class="chk" />
 72                 </td>
 73                 <td class="getData">
 74                     1234
 75                 </td>
 76             </tr>
 77             <tr>
 78                 <td>
 79                     <input type="checkbox" class="chk" />
 80                 </td>
 81                 <td class="getData">
 82                    5678
 83                 </td>
 84             </tr>
 85             <tr>
 86                 <td>
 87                     <input type="checkbox" class="chk" />
 88                 </td>
 89                 <td class="getData">
 90                    12345678
 91                 </td>
 92             </tr>
 93             <tr>
 94                 <td>
 95                     <input type="checkbox" class="chk" />
 96                 </td>
 97                 <td class="getData">
 98                    87654321
 99                 </td>
100             </tr>
101         </table>
102     </div>
103     </form>
104     <hr />
105     <input type="button" id="but" onclick="sendData()" value="将选中的数据利用Ajax发送到后台" style=" background-color:#0080BB; cursor:pointer; border:1px solid #008094; border-radius:5px;" />
106 </body>
107 </html>

后台处理代码:

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Web;
 5 using System.Web.UI;
 6 using System.Web.UI.WebControls;
 7 using System.Web.Script.Serialization;
 8 using System.Web.Services;
 9 
10 namespace aspnetAjax
11 {
12     public partial class Index : System.Web.UI.Page
13     {
14         public string title = "asp.net中使用Ajax";
15         protected void Page_Load(object sender, EventArgs e)
16         {
17 
18         }
19         [WebMethod]
20         public static string GetAjaxValue(string sendValue) 
21         {
22             return sendValue;
23         }
24     }
25 }

注意事项说明1:

注意事项说明二:

最终实现:

天气寒冷,就先写到这里....

原文地址:https://www.cnblogs.com/luo-super/p/4118550.html