jQuery异步调用页面后台实例分析
jQuery调用页面后台方法如下：
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
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