Question

我使用WebClient来获取Windows Phone 8和Android的Yahoo数据使用WebClient的HttpClient我可以做到

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

发送事件后;

   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中没有这样的东西。

如何获取以下数据？＆GT; http://weather.yahooapis.com/forecastrss?w=2343732&u=c

Answer 1

您可以使用HttpClient类，如下所示：

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);
}

更简单的版本只是：

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

但是如果发生http错误，GetStringAsync将抛出HttpResponseException，并且到目前为止我可以看到除异常消息外没有指示http状态。

更新：我没有注意到你实际上是在尝试阅读RSS Feed，你不需要HttpClient和XML解析器，只需使用SyndicationFeed类，这里就是例子：

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

Windows 8的WebClient替代方案？

1 个答案: