Question

我目前正在开发Weather API，我正在尝试从OpenWeatherMap.org获取值。但是当我点击按钮从网站上检索信息时。它给了我以下错误。Here's the Screenshot of the exception,I am Getting.

此外，我点击按钮的UI。

Here's the Screenshot

System.Exception was unhandled by user code
HResult=-2146233088
Message=Exception of type 'System.Exception' was thrown.
Source=UWPWeather
StackTrace:
   at UWPWeather.LocationManager.<GetPosition>d__0.MoveNext()
--- End of stack trace from previous location where exception was thrown ---
   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)
   at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
   at UWPWeather.MainPage.<Button_Click>d__1.MoveNext()
   InnerException:

OpenWeatherMapProxy.cs代码：

        using System;
        using System.Collections.Generic;
        using System.IO;
        using System.Linq;
        using System.Net.Http;
        using System.Runtime.Serialization;
        using System.Runtime.Serialization.Json;
        using System.Text;
        using System.Threading.Tasks;

        namespace WeatherAPI
        {
        public class OpenWeatherMapProxy
        {
        public async static Task<RootObject>GetWeather(double lat,double lon)

        {

        var http = new HttpClient();

        var response = await http.GetAsync("http://api.openweathermap.org/data/2.5/weather? lat=35&lon=77.20081&appid=b1b15e88fa797225412429c1c50c122a");


        var result = await response.Content.ReadAsStringAsync();

        var serializer = new DataContractJsonSerializer(typeof(RootObject));

        var ms = new MemoryStream(Encoding.UTF8.GetBytes(result));

        var data = (RootObject)serializer.ReadObject(ms);
        return data;

    }

}

public class Coord
{
    [DataMember]
    public double lon { get; set; }
    [DataMember]
    public double lat { get; set; }
}
[DataContract]
public class Weather
{
    [DataMember]
    public int id { get; set; }
    [DataMember]
    public string main { get; set; }
    [DataMember]
    public string description { get; set; }
    [DataMember]
    public string icon { get; set; }
}
[DataContract]
public class Main
{
    [DataMember]
    public double temp { get; set; }
    [DataMember]
    public int pressure { get; set; }
    [DataMember]
    public int humidity { get; set; }
    [DataMember]
    public double temp_min { get; set; }
    [DataMember]
    public double temp_max { get; set; }
}
[DataContract]
public class Wind
{
    [DataMember]
    public double speed { get; set; }
    [DataMember]
    public int deg { get; set; }
}
[DataContract]
public class Clouds
{
    [DataMember]
    public int all { get; set; }
}
[DataContract]
public class Sys
{
    [DataMember]
    public int type { get; set; }
    [DataMember]
    public int id { get; set; }
    [DataMember]
    public double message { get; set; }
    [DataMember]
    public string country { get; set; }
    [DataMember]
    public int sunrise { get; set; }
    [DataMember]
    public int sunset { get; set; }
}
[DataContract]
public class RootObject
{
    [DataMember]
    public Coord coord { get; set; }
    [DataMember]
    public List<Weather> weather { get; set; }
    [DataMember]
    public string @base { get; set; }
    [DataMember]
    public Main main { get; set; }
    [DataMember]
    public Wind wind { get; set; }
    [DataMember]
    public Clouds clouds { get; set; }
    [DataMember]
    public int dt { get; set; }
    [DataMember]
    public Sys sys { get; set; }
    [DataMember]
    public int id { get; set; }
    [DataMember]
    public string name { get; set; }
    [DataMember]
    public int cod { get; set; }
}

MainPage.xaml.cs代码：

    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Runtime.InteropServices.WindowsRuntime;
    using Windows.Foundation;
    using Windows.Foundation.Collections;
    using Windows.UI.Xaml;
    using Windows.UI.Xaml.Controls;
    using Windows.UI.Xaml.Controls.Primitives;
    using Windows.UI.Xaml.Data;
    using Windows.UI.Xaml.Input;
    using Windows.UI.Xaml.Media;
    using Windows.UI.Xaml.Navigation;

    // The Blank Page item template is documented at           http://go.microsoft.com/fwlink/?LinkId=402352&clcid=0x409

   namespace WeatherAPI
   {
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();
    }

    private async void Button_Click(object sender, RoutedEventArgs e)
    {
        RootObject myWeather = await OpenWeatherMapProxy.GetWeather(20.0,30.0);
        ResultTextBlock.Text = myWeather.name + " - " + ((int)myWeather.main.temp).ToString();
    } 
}

}

mscorlib.ni.dll中出现“System.Exception”类型的异常，但未在用户代码中处理

0 个答案: