jquery异步调用页面后台方法?
给出了两个简单的例子，无参数的和有参数的，返回的都是json数据。
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="JqueryCSMethodForm.aspx.cs" Inherits="JQuerWeb.JqueryCSMethodForm" %>
<!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>
??? <script type="text/javascript" src="JS/jquery-1.4.2.js"></script>
???
????<script type="text/javascript">
??????? $(document).ready(function() {
??????????? $("input[type='button'][value='GetDate']").click(function() {
??????????????? $.ajax({
??????????????????? type: "post",
??????????????????? url: "JqueryCSMethodForm.aspx/GetNowDate",
??????????????????? datatype: "json",
??????????????????? contentType: "application/json; charset=utf-8",
??????????????????? success: function(data) {
??????????????????????? $("input#showTime").val(eval('(' + data.d + ')')[0].nowtime);
??????????????????? },
??????????????????? error: function(XMLHttpRequest, textStatus, errorThrown) {
????????????????????? ??alert(errorThrown);
??????????????????? }
??????????????? });
??????????? });
??????????? $("input[type='button'][value='GetOneDayLater']").click(function() {
??????????????? $.ajax({
??????????????????? type: "post",
??????????????????? url: "JqueryCSMethodForm.aspx/GetOneDayLate",
??????????????????? data:"{days:1}",
??????????????????? datatype: "json",
??????????????????? contentType: "application/json; charset=utf-8",
??????????????????? success: function(data) {
??????????????????????? $("input#showTime").val(eval('(' + data.d + ')')[0].nowtime);
??????????????????? },
??????????????????? error: function(XMLHttpRequest, textStatus, errorThrown) {
??????????????????? alert(errorThrown);
??????????????????? }
??????????????? });
??????????? });
??????? });
??????
????</script>
</head>
<body>
??? <form id="form1" runat="server">
??? <div>
??????? <input type="button" value="GetDate" />
??????? <input type=button value="GetOneDayLater" />
??????? <input type="text" id="showTime" />
??? </div>
??? </form>
</body>
</html>
CS代码：
?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.Services;
namespace JQuerWeb
{
??? public partial class JqueryCSMethodForm : System.Web.UI.Page
??? {
???????
????????protected void Page_Load(object sender, EventArgs e)
??????? {
??????????
????????}
??????? [WebMethod]
??????? public static String GetNowDate()
??????? {
??????????? return "[{\"nowtime\":\"" + DateTime.Now.ToShortDateString() + "\"}]";
??????? }
??????? [WebMethod]
??????? public static String GetOneDayLate(Int32 days)
??????? {
??????????? return "[{\"nowtime\":\"" + DateTime.Now.AddDays(days).ToShortDateString() + "\"}]";
??????? }
??? }
}
注意点：
(1) url的填写格式 url+"/method name"
(2) contentType: "application/json; charset=utf-8", 这个必须要有
(3) 返回数据的类型为json
(4) data:"{days:1}",参数的传递
(5)? 后台的方法必须是public static 而且还要有 [WebMethod]特性修饰