使用xamarin跨平臺不能在列表視圖中使用xamarin跨平臺打印json消息

使用xamarin跨平臺開發我想從url打印json消息並在列表視圖中打印。我寫代碼沒有錯誤，但有一些錯誤。我不會工作。僅用於驗證輸出，僅打印輸出屏幕中的按鈕。我會顯示，但列表視圖不是打印。請記錄我的代碼。使用xamarin跨平臺不能在列表視圖中使用xamarin跨平臺打印json消息

static ListView listview; 
    static Button button; 
    public MainPage() 
    { 
     listview = new ListView() { RowHeight = 40 }; 
     button = new Button() { Text = "search Again" }; 
     var stack = new StackLayout() 
     { 
      VerticalOptions = LayoutOptions.FillAndExpand, 
      Children = { button, listview }, 
     }; 
     this.Content = stack; 
     GetData(); 
    } 
    async static void GetData() 
    { 
     WeatherReport res = new WeatherReport(); 
     try 
     { 
      string contents; 
      string Url = String.Format("http://23.253.66.248:8080/icc/api/venue/search/?    lat=39.540544&lon=-104.866115&appkey=123Chesse&restName=MyMacChennai&organization=MyMacChennai"); 
      HttpClient hc = new HttpClient(); 
      contents = await hc.GetStringAsync(Url); 
      res = JsonConvert.DeserializeObject<WeatherReport>(contents); 
      listview.ItemsSource = res.list; 
     } 
     catch (System.Exception sysExc) 
     { 
      // Do something to log this error. 
      throw; 
     } 
    } 
public class WeatherReport 
{ 
    public WeatherReport() 
    { 
     list = new List<WeatherReport>(); 
    } 
    [JsonProperty(PropertyName = "cod")] 
    public string cod { get; set; } 
    [JsonProperty(PropertyName = "message")] 
    public string message { get; set; } 
    [JsonProperty(PropertyName = "cnt")] 
    public int cnt { get; set; } 
    [JsonProperty(PropertyName = "list")] 
    public List<WeatherReport> list { get; set; }

來源

2014-10-31 Satheesh Santhosh

您是否驗證過您的數據正在填充正確？ – Jason 2014-10-31 17:01:14