HttpClient卡住

Question

我正在尝试从soundcloud获得响应。这是我的密码。

public static async Task<string> GetTheGoodStuff()
  {
     var client = new HttpClient(new NativeMessageHandler());
     var response = await client.GetAsync("http://api.soundcloud.com/playlists?client_id=17ecae4040e171a5cf25dd0f1ee47f7e&limit=1");
     var responseString = response.Content.ReadAsStringAsync().Result;
     return responseString;
   }

但这是var response = await client.GetAsync上的垃圾。我怎么才能解决这个问题？

谢谢!

Answer 1

我只是在PCL中使用了您的代码，我只更改了url (到https)以满足iOS ATS的需求，并从异步方法调用它。在iOS设备上运行似乎很好。我在PCL中获取了对Microsoft.Net.Http的引用，在PCL 和平台特定项目(通过NuGet)中获取了ModernHttpClient的引用。

某些PCL视图模型类中的代码：

using System.Net.Http;
using System.Threading.Tasks;
using ModernHttpClient;

public class ItemsViewModel
{

...

    public async Task<string> GetPlaylist()
    {
        // Use https to satisfy iOS ATS requirements.
        var client = new HttpClient(new NativeMessageHandler());
        var response = await client.GetAsync("https://api.soundcloud.com/playlists?client_id=17ecae4040e171a5cf25dd0f1ee47f7e&limit=1");
        var responseString = await response.Content.ReadAsStringAsync();
        return responseString;
    }

...

}

然后，在实例化和使用视图模型实例的PCL页面类中：

public partial class ItemsPage : ContentPage
{
    public ItemsPage()
    {
        InitializeComponent();
        Vm = new ItemsViewModel();
        BindingContext = Vm;
    }

    protected override async void OnAppearing()
    {
        var playlist = await Vm.GetPlaylist();
        // Do something cool with the string, maybe some data binding.
    }

    // Public for data binding.
    public ItemsViewModel Vm { get; private set; }
}

希望这能有所帮助。

Answer 2

我也有同样的问题。我用以下方法修正了它：

var response = httpClient.GetAsync(ApiUrl).ConfigureAwait(false).GetAwaiter().GetResult();

你可以试试。