将一些数据从控制台发布到 web API 使用 PostAsJsonAsync 时发送请求时出错

Question

我想在同一台 windows 服务器上将一些数据从控制台发布到 web API 并且有我的代码：

foreach (var i in txt)
{
  string[] j = i.Split("|");
   try
   {
    SomeModel d = new SomeModel()
    {
      Id = Guid.NewGuid(),
      Name = j[0],
      PhoneNumber = j[1],
      Custid = j[2],
      ZipCode = j[3]
    };
 
       var client = new HttpClient();
       client.BaseAddress = new Uri("http://localhost:5000/");
       client.DefaultRequestHeaders.Accept.Clear();
       client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
       client.DefaultRequestHeaders.AcceptCharset.Add(new StringWithQualityHeaderValue("utf-8"));
       string body = JsonConvert.SerializeObject(d);
       string signature = GetRSA(body, privatekey);
       client.DefaultRequestHeaders.Add("signature", signature);
       HttpResponseMessage resPost = await client.PostAsJsonAsync("api/SomeApi", d);
   }
   catch (Exception ex)
   {
       Console.WriteLine(ex.Message, ex.InnerException, ex.StackTrace)
   }
}   

发生了一些异常，如下所示：

执行：

发送请求时出错

System.IO.IOException: Unable to read data from the transport connection: 连接尝试失败，因为连接方在一段时间后没有正确响应，或者建立连接失败，因为连接的主机没有响应.. ---> System.Net.Sockets.SocketException (10060)：连接尝试失败，因为连接方在一段时间后没有正确响应，或者连接失败，因为连接的主机没有响应。 --- 内部异常堆栈跟踪结束 --- 在 System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs.ThrowException（SocketError 错误，CancellationToken cancelToken）处 System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs（System.Net.Sockets.Socket.AwaitableSocketAsyncEventArgs. Net.Http.HttpConnection.FillAsync() at System.Net.Http.HttpConnection.ReadNextResponseHeaderLineAsync(Boolean foldedHeadersAllowed) at System.Net.Http.HttpConnection.SendAsyncCore(HttpRequestMessage request, CancellationToken cancellationToken)

在 System.Net.Http.HttpConnectionPool 的 System.Net.Http.HttpConnection.SendAsyncCore（HttpRequestMessage 请求，CancellationToken cancelToken）。 SendWithNtConnectionAuthAsync(HttpConnection connection, HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken) at System.Net.Http.HttpConnectionPool.SendWithRetryAsync(HttpRequestMessage request, Boolean doRequestAuth, CancellationToken cancellationToken) at System.Net.Http.RedirectHandler.SendAsync(HttpRequestMessage request, CancellationToken cancellationToken ) 在 System.Net.Http.HttpClient.FinishSendAsyncBuffered(Task`1 sendTask, HttpRequestMessage request, CancellationTokenSource cts, Boolean disposeCts)

如何从HttpResponseMessage resPost = await client.PostAsJsonAsync("api/SomeApi", d);