protected override void OnNavigatedTo(NavigationEventArgs e)
{
RssModel item = e.Parameter as RssModel;
this.DataContext = item;
}
//借鉴一下
public static void GetRssItems(string rssFeed, Action <IEnumerable <RssModel> > onGetRssItemsCompleted = null, Action <string> onError = null)
{
WebRequest request = HttpWebRequest.Create(rssFeed);
request.Method = "GET";
request.BeginGetResponse((result) =>
{
try
{
HttpWebRequest httpWebRequest = (HttpWebRequest)result.AsyncState;
WebResponse webResponse = httpWebRequest.EndGetResponse(result);
using (Stream stream = webResponse.GetResponseStream())
{
using (StreamReader reader = new StreamReader(stream))
{
string content = reader.ReadToEnd();
List <RssModel> rssItems = new List <RssModel>();
SyndicationFeed feeds = new SyndicationFeed();
feeds.Load(content);
foreach (SyndicationItem f in feeds.Items)
{
RssModel rssItem = new RssModel(f.Title.Text, f.Summary.Text, f.PublishedDate.ToString(), f.Links[0].Uri.AbsoluteUri);
rssItems.Add(rssItem);
}
if (onGetRssItemsCompleted != null)
{
onGetRssItemsCompleted(rssItems);
}
}
}
}
catch (WebException webEx)
{
string exceptionInfo = "";
switch (webEx.Status)
{
case WebExceptionStatus.ConnectFailure:
exceptionInfo = "ConnectFailure:远程服务器连接失败。";
break;
case WebExceptionStatus.MessageLengthLimitExceeded:
exceptionInfo = "MessageLengthLimitExceeded:网路请求的消息长度受到限制。";
break;
case WebExceptionStatus.Pending:
exceptionInfo = "Pending:内部异步请求挂起。";
break;
case WebExceptionStatus.RequestCanceled:
exceptionInfo = "RequestCanceled:该请求将被取消。";
break;
case WebExceptionStatus.SendFailure:
exceptionInfo = "SendFailure:发送失败，未能将完整请求发送到远程服务器。";
break;
case WebExceptionStatus.UnknownError:
exceptionInfo = "UnknownError:未知错误。";
break;
case WebExceptionStatus.Success:
exceptionInfo = "Success:请求成功。";
break;
default:
exceptionInfo = "未知网络异常。";
break;
}
if (onError != null)
{
onError(exceptionInfo);
}
}
catch (Exception e)
{
if (onError != null)
{
onError("异常：" + e.Message);
}
}
}, request);
}
