[英]Timeout exception with wp7 REST service call using WebClient
編輯:我很樂意在這個問題上放棄賞金 - 時間快到了 - 以下所有評論都是最新的,但仍無法解決。
得到一個奇怪的錯誤。 我已經將我的代碼縮減為絕對最簡單的形式,並且仍然會出現以下代碼的錯誤。
public partial class MainPage : PhoneApplicationPage {
private readonly WebClient webClient;
public MainPage() {
InitializeComponent();
webClient = new WebClient();
webClient.OpenReadCompleted += clientOpenRead_Completed;
}
private void LoadButton_Click(object sender, RoutedEventArgs e) {
webClient.OpenReadAsync(new Uri(@"validURL"));
}
private void clientOpenRead_Completed(object sender, System.Net.OpenReadCompletedEventArgs e) {
using (var sr = new StreamReader(e.Result)) {
Result.Text = sr.ReadToEnd();
}
}
}
sr.ReadToEnd(); 總是返回空字符串,當我從clientOpenRead_Completed檢查'e.Result'時,它包含以下異常:
base {"Timeouts are not supported on this stream."} System.SystemException {System.InvalidOperationException}
其他重要驗證:validURL在瀏覽器請求時有效。 此外,上面的代碼在控制台應用程序中調用時工作正常,同樣的URL和類似的代碼在Monodroid中工作正常。
最后,服務源非WCF。
有任何想法嗎?
謝謝。
編輯:堆棧跟蹤在我正在檢查e.Result :(來自一個略有不同的項目,但有相同的問題)
> AppTest.dll!AppTest.Data.AsyncServiceProvider.clientOpenRead_Completed(object sender, System.Net.OpenReadCompletedEventArgs e) Line 20 C#
System.Net.dll!System.Net.WebClient.OnOpenReadCompleted(System.Net.OpenReadCompletedEventArgs e) + 0x15 bytes
System.Net.dll!System.Net.WebClient.OpenReadOperationCompleted(object arg) + 0xc bytes
mscorlib.dll!System.Reflection.RuntimeMethodInfo.InternalInvoke(System.Reflection.RuntimeMethodInfo rtmi, object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object parameters, System.Globalization.CultureInfo culture, bool isBinderDefault, System.Reflection.Assembly caller, bool verifyAccess, ref System.Threading.StackCrawlMark stackMark)
mscorlib.dll!System.Reflection.RuntimeMethodInfo.InternalInvoke(object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, object[] parameters, System.Globalization.CultureInfo culture, ref System.Threading.StackCrawlMark stackMark) + 0x168 bytes
mscorlib.dll!System.Reflection.MethodBase.Invoke(object obj, object[] parameters) + 0xa bytes
mscorlib.dll!System.Delegate.DynamicInvokeOne(object[] args) + 0x98 bytes
mscorlib.dll!System.MulticastDelegate.DynamicInvokeImpl(object[] args) + 0x8 bytes
mscorlib.dll!System.Delegate.DynamicInvoke(object[] args) + 0x2 bytes
System.Windows.dll!System.Windows.Threading.DispatcherOperation.Invoke() + 0xc bytes
System.Windows.dll!System.Windows.Threading.Dispatcher.Dispatch(System.Windows.Threading.DispatcherPriority priority) + 0x83 bytes
System.Windows.dll!System.Windows.Threading.Dispatcher.OnInvoke(object context) + 0x8 bytes
System.Windows.dll!System.Windows.Hosting.CallbackCookie.Invoke(object[] args) + 0x19 bytes
System.Windows.dll!System.Windows.Hosting.DelegateWrapper.InternalInvoke(object[] args) + 0x2 bytes
System.Windows.RuntimeHost.dll!System.Windows.RuntimeHost.ManagedHost.InvokeDelegate(System.IntPtr pHandle, int nParamCount, System.Windows.Hosting.NativeMethods.ScriptParam[] pParams, ref System.Windows.Hosting.NativeMethods.ScriptParam pResult) + 0x5e bytes
[External Code]
也許試試:webClient.DownloadStringAsync(yourUrl);
代替
webClient.OpenReadAsync(yourUrl);
在調用OpenReadAsync()
之前,嘗試將webClient
AllowReadStreamBuffering設置為false
。
UPDATE
根據您的評論,我認為您可能有錯誤的(非Windows手機)版本的System.Net.dll
引用,這可能是問題的原因。 在7.1(標准安裝)它應該是
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\Silverlight\v4.0\Profile\WindowsPhone71\System.Net.dll
如果你是7.0,它應該是
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\Silverlight\v4.0\Profile\WindowsPhone\System.Net.dll
您是否嘗試使用具有不同ContentType
和Accept
標頭的HttpWebRequest
執行相同的操作?
HttpWebRequest httpWebRequest = HttpWebRequest.CreateHttp(@"validURL");
httpWebRequest.Method = "GET";
httpWebRequest.BeginGetResponse((asyncresult) =>
{
try
{
WebResponse webResponse = httpWebRequest.EndGetResponse(asyncresult);
using (Stream stream = webResponse.GetResponseStream())
{
StreamReader Reader = new StreamReader(stream);
string response = Reader.ReadToEnd();
}
}
catch (Exception ex)
{
exception(ex);
}
}, httpWebRequest);
網址是否為https? 如果是這樣,你可以嘗試從WP7中的瀏覽器點擊URL嗎?
此請求的數據量是多少?
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.