適用於Windows 8的WebClient替代方案？

Question

我用WebClient獲取用於Windows Phone的8和Android 的HttpClient隨着WebClient的雅虎數據發送事件後我能做的

WebClient client = new WebClient(); 
    client.DownloadStringCompleted += new  DownloadStringCompletedEventHandler(client_DownloadStringCompleted); 
    client.DownloadStringAsync(url); 

;

StringReader stream = new StringReader(e.Result) 

    XmlReader reader = XmlReader.Create(stream); 
    reader.ReadToFollowing("yweather:atmosphere"); 
    string humidty = reader.MoveToAttribute("humidity"); 

但在Windows 8 RT中沒有這樣的事情。

如何獲取以下數據？ >http://weather.yahooapis.com/forecastrss?w=2343732&u=c

Answer 1

您可以使用HttpClient的類，像這樣：

public async static Task<string> GetHttpResponse(string url) 
{ 
    var request = new HttpRequestMessage(HttpMethod.Get, url); 
    request.Headers.Add("UserAgent", "Windows 8 app client"); 

    var client = new HttpClient(); 
    var response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead); 

    if (response.IsSuccessStatusCode) 
     return await response.Content.ReadAsStringAsync(); 
    else 
    throw new Exception("Error connecting to " + url +" ! Status: " + response.StatusCode); 
} 

簡單的版本將只是：

public async static Task<string> GetHttpResponse(string url) 
{ 
    var client = new HttpClient(); 
    return await client.GetStringAsync(url); 
} 

但如果出現HTTP錯誤GetStringAsync將拋出HttpResponseException，而據我除異常消息外，可以看到沒有指示http狀態。

更新： 我沒有注意到，你其實你正試圖讀取RSS訂閱，你並不需要的HttpClient和XML解析器，只需使用SyndicationFeed類，這裏是例子：

http://msdn.microsoft.com/en-us/library/windows/apps/xaml/hh452994.aspx