windows phone调用api解析json前端显示

如题
这是我的api和json

http://300report.jumpw.com/api/getrole?

{
 "Result":"OK",
 "Role":
 {
 "RoleName":"张三",
 "RoleLevel":23,
 "JumpValue":1003,
 "WinCount":50,
 "MatchCount":80,
 "UpdateTime":"2013-11-04 14:45:00"
 }

这是我现在的情况

    private async void chaxunbutton_Click(object sender, RoutedEventArgs e)
    {
        HttpClient hc = new HttpClient();
        var task = await
        hc.GetAsync("http://300report.jumpw.com/api/getrole?");

        {

            JObject jobject = JObject.Parse("{\"角色名\":\"\" \"等级\":\"\"\"节操值\":\"\"\"胜场数\":\"\"\"总场数\":\"\"\"更新日期\":\"\"}");
            JToken token = jobject["http://300report.jumpw.com/api/getrole?"];
            ListBox<string> listview = new ListBox<string>;
            foreach (JToken t in token)
            {
                listView.Add(t.ToString());
            }

求大触救救我这个萌新