Question

I am trying to receive a json data using ajax asp.net. i have got a web service with a web method -

[WebMethod]
public List<Song> GetSongListByMood(string Mood)
{
    SongBL songbl = new SongBL();
    return songbl.GetSongListByMoodBL(Mood);
}

我拿到了刺杀密码...

        $(document).ready(function () {
        var cssSelector = {
            jPlayer: "#jquery_jplayer_1",
            cssSelectorAncestor: "#jp_container_1"
        };
        var playlist = [];
        var options = {
            swfPath: "./js",
            supplied: "mp3"
        };
        var myPlaylist = new jPlayerPlaylist(cssSelector, playlist, options);
        $("#slider a").click(function () {
            var mood = $(this).text();
            var xhr = new XMLHttpRequest();
            var url = "AvironaService.asmx/GetSongListByMood";
            xhr.open("POST", url, true);
            xhr.onreadystatechange = function () {
                if (xhr.readyState == 4 && xhr.status == 200) {
                    var obj = JSON.parse(xhr.responseXML.text);
                    myPlaylist.playlist = obj;
                }
            };
            var contentType = "application/x-www-form-urlencoded"
            xhr.setRequestHeader("Content-Type", contentType);
            var qs =  Mood=  + mood;
            xhr.send(qs);
        });});

现在我想做的基本上就是用json格式的ajax格式从服务器上获取数据,并将数据放入播放列表变量

Answer 1

您需要做一些修改。

更改您返回 string 的方法, 而不是 List< Song> 。
添加语句 使用系统。 Web.Script.Servication 。
创建 JavaScript序列化器 实例, 并使用此实例对对象进行序列化, 并返回结果。

那么... So... So...

using System.Web.Script.Serialization;

[WebMethod]
[ScriptMethod(ResponseFormat=ResponseFormat.Json)]     
public string GetSongListByMood(string Mood)
{
    SongBL songbl = new SongBL();
    var jss = new JavaScriptSerializer();
    return jss.Serialize(songbl.GetSongListByMoodBL(Mood));
}

更改 AJAX 代码, 以利用可用的 JQuery 方法 :

$("#slider a").click(function () {
    $.ajax({
        "url" : "AvironaService.asmx/GetSongListByMood",
        "type" : "post",
        "data" : {"Mood" : $(this).text()},
        "dataType" : "json"
        "success" : function(data){
          myPlaylist.playlist = data;
        }
    });
});

友情链接