本文介绍了在等待PostAsJsonAsync AggregateException抛出的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

限时删除!!

AggregateException是扔在等待API后,完成我怎么能解决这个问题?

我的API调用是这样的类似

 使用(VAR的HttpClient =新的HttpClient())
{
    httpClient.BaseAddress =新的URI(workflowUrl);
    VAR任务= httpClient.PostAsJsonAsync(API / apiname /执行/,executeModel)
                             .ContinueWith(X => x.Result.Content.ReadAsAsync<布尔>()的结果。);    任务延续= task.ContinueWith(X =>
    {
        布尔响应= x.Result;
    });
    continuation.Wait();}

我得到异常如下而waitng完成POST。

  System.AggregateException被抓
  消息=发生一个或多个错误。
  来源= mscorlib程序
  堆栈跟踪:
       在System.Threading.Tasks.Task.ThrowIfExceptional(布尔includeTaskCanceledExceptions)
       在System.Threading.Tasks.Task.Wait(的Int32 millisecondsTimeout,的CancellationToken的CancellationToken)
       在System.Threading.Tasks.Task.Wait()
       在
  的InnerException:System.AggregateException
       消息=发生一个或多个错误。
       来源= mscorlib程序
       堆栈跟踪:
            在System.Threading.Tasks.Task.ThrowIfExceptional(布尔includeTaskCanceledExceptions)
            在System.Threading.Tasks.Task`1.get_Result()
            在
            在System.Threading.Tasks.Task`1<方式>&c__DisplayClass17 LT; ContinueWith> b__16(obj对象)
            在System.Threading.Tasks.Task.InnerInvoke()
            在System.Threading.Tasks.Task.Execute()
       的InnerException:System.AggregateException
            消息=发生一个或多个错误。
            来源= mscorlib程序
            堆栈跟踪:
                 在System.Threading.Tasks.Task.ThrowIfExceptional(布尔includeTaskCanceledExceptions)
                 在System.Threading.Tasks.Task`1.get_Result()
                 在WebUI.ListController< ListRepeater_ItemCommand> b__f(Task`1 X)在PostAsJsonAsync:741线
                 在System.Threading.Tasks.Task`1<方式>&c__DisplayClass1a`1 LT; ContinueWith> b__19()
                 在System.Threading.Tasks.Task`1.InvokeFuture(对象futureAsObj)
                 在System.Threading.Tasks.Task.InnerInvoke()
                 在System.Threading.Tasks.Task.Execute()
            的InnerException:System.Threading.Tasks.TaskCanceledException
                 消息=任务被取消。
                 的InnerException:


解决方案

您发布一大块的数据?我曾有过一个类似的问题。我认为,根本的问题是偶尔超时由于带宽的问题。我试图让任务和手动等待它,然后检查 .IsFaulted .IsCancelled 。结果抛出 AggregateException / TaskCancelledException

也许你应该尝试增加HttpClient.Timeout财产是100秒默认?

AggregateException is throwing while waiting for API post to complete how i could fix this?

My API call is similar like this

using (var httpClient = new HttpClient())
{
    httpClient.BaseAddress = new Uri(workflowUrl);
    var task = httpClient.PostAsJsonAsync("api/apiname/execute/", executeModel)
                             .ContinueWith(x => x.Result.Content.ReadAsAsync<bool>().Result);

    Task continuation = task.ContinueWith(x =>
    {
        bool response = x.Result;
    });
    continuation.Wait();

}

I am getting Exception given below while waitng for POST to complete.

  System.AggregateException was caught
  Message=One or more errors occurred.
  Source=mscorlib
  StackTrace:
       at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
       at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationToken cancellationToken)
       at System.Threading.Tasks.Task.Wait()
       at
  InnerException: System.AggregateException
       Message=One or more errors occurred.
       Source=mscorlib
       StackTrace:
            at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
            at System.Threading.Tasks.Task`1.get_Result()
            at
            at System.Threading.Tasks.Task`1.<>c__DisplayClass17.<ContinueWith>b__16(Object obj)
            at System.Threading.Tasks.Task.InnerInvoke()
            at System.Threading.Tasks.Task.Execute()
       InnerException: System.AggregateException
            Message=One or more errors occurred.
            Source=mscorlib
            StackTrace:
                 at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
                 at System.Threading.Tasks.Task`1.get_Result()
                 at WebUI.ListController.<ListRepeater_ItemCommand>b__f(Task`1 x) in PostAsJsonAsync:line 741
                 at System.Threading.Tasks.Task`1.<>c__DisplayClass1a`1.<ContinueWith>b__19()
                 at System.Threading.Tasks.Task`1.InvokeFuture(Object futureAsObj)
                 at System.Threading.Tasks.Task.InnerInvoke()
                 at System.Threading.Tasks.Task.Execute()
            InnerException: System.Threading.Tasks.TaskCanceledException
                 Message=A task was canceled.
                 InnerException:
解决方案

Are you posting a big piece of data ? Once I had a similar issue. I believe the underlying problem is occasional timeout due to bandwidth issues. I tried getting the task and manually waiting on it then checking .IsFaulted and .IsCancelled but the .Result throws AggregateException / TaskCancelledException.

Maybe you should try to increase HttpClient.Timeout property which is 100 sec by default ?

这篇关于在等待PostAsJsonAsync AggregateException抛出的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

1403页,肝出来的..

09-08 00:00