大多数情况下，我们不会再Javascript中直接创建JSON字符串。而是，创建一些Javascript对象，这些对象和服务器上的.net对象对应。因此，可以在服务器上创建.net实体类，然后串行化成JSON格式，随后在浏览器中反串行化为Javascript对象。
Album.asmx
<%@ WebService Language="C#" Class="AlbumProxy" %>
using System;
using System.Web;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Script.Services;
using System.Net;
using System.Xml.Serialization;
using System.Web.Script.Serialization;
public class Album
{
private string _artist = String.Empty;
private string _title = String.Empty;
private int _releaseYear;
private string[] _tracks = new string[16];
private DateTime _dateTime = DateTime.Now;
private string _personalInfo = "do not show this";
[ScriptIgnore]
public string PersonalInfo
{
get
{
return _personalInfo;
}
set
{
_personalInfo = value;
}
}
public Album() { }
public string Artist
{
get
{
return _artist;
}
set
{
_artist = value;
}
}
public string Title
{
get
{
return _title;
}
set
{
_title = value;
}
}
public int ReleaseYear
{
get
{
return _releaseYear;
}
set
{
_releaseYear = value;
}
}
public string[] Tracks
{
get
{
return _tracks;
}
set
{
_tracks = value;
}
}
}
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
//若要允许使用 ASP.NET AJAX 从脚本中调用此 Web 服务，请取消对下行的注释。
[System.Web.Script.Services.ScriptService]
public class AlbumProxy : System.Web.Services.WebService
{
private Album _album;
public AlbumProxy()
{
_album = new Album();
_album.Artist = "Phish";
_album.Title = "A Picture of Nectar";
_album.ReleaseYear = 1992;
_album.Tracks.SetValue("Llama", 0);
_album.Tracks.SetValue("Eliza", 1);
_album.Tracks.SetValue("Cavern", 2);
_album.Tracks.SetValue("Poor Heart", 3);
_album.Tracks.SetValue("Stash", 4);
_album.Tracks.SetValue("Manteca", 5);
_album.Tracks.SetValue("Guelah Papyrus", 6);
_album.Tracks.SetValue("Magilla", 7);
_album.Tracks.SetValue("The Landlady", 8);
_album.Tracks.SetValue("Glide", 9);
_album.Tracks.SetValue("Tweezer", 10);
_album.Tracks.SetValue("The Mango Song", 11);
_album.Tracks.SetValue("Chalk Dust Torture", 12);
_album.Tracks.SetValue("Faht", 13);
_album.Tracks.SetValue("Catapult", 14);
_album.Tracks.SetValue("Tweezer Reprise", 15);
}
[WebMethod]
[XmlInclude(typeof(Album))]
public object GetAlbum() {
return _album;
}
[WebMethod]
[XmlInclude(typeof(Album))]
public object GetAlbumJSON()
{
JavaScriptSerializer serializer = new JavaScriptSerializer();
return serializer.Serialize(_album);
}
}
ScriptProxy.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ScriptProxy.aspx.cs" Inherits="Chap9Project.ScriptProxy" %>
<%@ Import Namespace="System.Web.Script.Serialization" %>
<!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">
function pageLoad() {
AlbumProxy.GetAlbumJSON(completionJSON);
AlbumProxy.GetAlbum(completionObject);
}
function completionJSON(result) {
alert(result);
var album = Sys.Serialization.JavaScriptSerializer.deserialize(result);
$get(‘placeholder‘).innerHTML = album.Artist;
}
function completionObject(album) {
alert(album);
$get(‘placeholder2‘).innerHTML = album.ReleaseYear;
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server">
<Services>
<asp:ServiceReference Path="~/Album.asmx" />
</Services>
</asp:ScriptManager>
<div id="placeholder"></div>
<br />
<div id="placeholder2"></div>
</div>
</form>
</body>
</html>
时间： 2024-11-13 08:20:34