c# - Web Api 的 PostAsync HttpClient 错误 - System.AggregateException "A task was canceled."

Question

我正在尝试使用 System.Net.Http.HttpClient 从 Web API 调用 PostAsync 方法。我收到以下错误:

System.AggregateException "A task was canceled."

任务:

Id = 1, Status = System.Threading.Tasks.TaskStatus.Canceled, Method = "{null}", Result = "{Not yet computed}"

代码:

using (HttpClientHandler handler = new HttpClientHandler())
{
    handler.Credentials = new NetworkCredential("MyUsername", "p@ssw0rd");

    using (HttpClient client = new HttpClient(handler))
    {
        var postData = new List<KeyValuePair<string, string>>();
        postData.Add(new KeyValuePair<string, string>("status", "Hello world"));

        HttpContent content = new FormUrlEncodedContent(postData);

        var responseTask = client.PostAsync(url, content).ContinueWith(
            (postTask) =>
            {
                postTask.Result.EnsureSuccessStatusCode();
            });
    }

我假设 responseTask 会强制方法同步运行？

这是一个 WPF 应用程序，而不是 ASP.NET。

Answer 1

我遇到了同样的错误，并追踪到我的 HttpClient 超时。默认超时为 100 秒。我将以下内容添加到 HttpClient 的创建中。

HttpClient httpClient = new HttpClient();
httpClient.Timeout = TimeSpan.FromMinutes(10);