silverlight中的getasync异常

Question

大家好，我正在尝试用silverlight 5发送getasync请求。post异步工作没有任何问题，但getasync在添加授权头时抛出异常。当不添加授权头时，这无一例外地只有401。我该怎么做才能修复它呢？

代码：

    client.DefaultRequestHeaders.Add("Authorization", "Bearer secrettoken");

var getasynctask = await client.GetAsync("http://api.enteroption.com/api/UserDetails/GetUserIdByToken/");

例外情况是：

System.ArgumentException occurred
  Message=""
  StackTrace:
       at Microsoft.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)
       at Microsoft.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccess(Task task)
       at Microsoft.Runtime.CompilerServices.TaskAwaiter.ValidateEnd(Task task)
       at Microsoft.Runtime.CompilerServices.TaskAwaiter`1.GetResult()
       at ConsoleApplication3.Class1.<Func>d__1.MoveNext()
  InnerException: System.ArgumentException
       Message=Value does not fall within the expected range.
       StackTrace:
            at System.Net.Browser.BrowserHttpWebRequest.InternalEndGetResponse(IAsyncResult asyncResult)
            at System.Net.Browser.BrowserHttpWebRequest.<>c__DisplayClassa.<EndGetResponse>b__9(Object sendState)
            at System.Net.Browser.AsyncHelper.<>c__DisplayClass4.<BeginOnUI>b__0(Object sendState)
       InnerException:

Answer 1

我知道这很晚了，但我为此挣扎了很长一段时间，弄错了方向。但最终我做了下面的工作，它起作用了，这真的让我很恼火，因为这就是问题所在

  client.DefaultRequestHeaders.Add("Authorization", "Bearer " + kvp.Value);
  //client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", kvp.Value );