SignalR .NET Client Invoke引发异常 [英] SignalR .NET Client Invoke throws an exception

问题描述

我正在尝试让一个与SignalR .Net Client一起使用的控制台应用程序，但是当我尝试在Hub上调用方法时却遇到了一个错误.这是我的控制台应用程序代码:

I'm trying to get a console application working with the SignalR .Net Client but I'm getting an error when I try to invoke a method on the Hub. Here's my code for the console app:

static void Main(string[] args)
{            
    var connection = new HubConnection("http://localhost/SignalRTest");
    var myHub = connection.CreateProxy("SignalRTest.Classes.service");

    myHub.On<string>("addMessage", text =>
    {
        Console.WriteLine(text);
    });

    connection.Start().ContinueWith(task =>
    {
        if (task.IsFaulted)
        {   
            Console.WriteLine("There was an error opening the connection: {0}", task.Exception.GetBaseException());
        }
        else {                        
            Console.WriteLine("Connected.");
        }
   }).Wait();


   myHub.Invoke("Send", "Message from console.").ContinueWith(task => {
       if (task.IsFaulted)
       {                
           Console.WriteLine("There was an error calling Send: {0}", task.Exception.GetBaseException());
       }
       else
       {
           Console.WriteLine("Send complete.");
       }

   });


   Console.ReadLine();

}

这是来自服务器的集线器:

Here is the Hub from the Server:

[HubName("service")]
public class ServiceHub : Hub
{
    public void Send(string message)
    {
        // Call the addMessage method on all clients
        Clients.addMessage(message);
    }
}

我认为控制台应用程序正确连接，因为它写出已连接".但是，当它尝试在服务器上调用Send方法时，出现以下错误:

I assume that the console app is connecting correctly because it writes out "Connected." But when it tries to call the Send method on the server, I get the following error:

System.Net.WebException:远程服务器返回错误:(500)内部服务器错误. 在System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) 在SignalR.HttpHelper中.<> c_ DisplayClass2.b _0(IAsyncResult ar) 在System.Threading.Tasks.TaskFactory 1.FromAsyncCoreLogic(IAsyncResult iar, Func 2 endMethod，TaskCompletionSource`1 tcs)

System.Net.WebException: The remote server returned an error: (500) Internal Server Error. at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult) at SignalR.HttpHelper.<>c_DisplayClass2.b_0(IAsyncResult ar) at System.Threading.Tasks.TaskFactory1.FromAsyncCoreLogic(IAsyncResult iar, Func2 endMethod, TaskCompletionSource`1 tcs)

有人可以告诉我我在做什么错吗?谢谢.

Can anyone tell me what I'm doing wrong? Thanks.

推荐答案

此问题似乎是由使用无效的集线器名称引起的(使用CreateProxy时).奇怪的是start方法没有失败，但是我只是测试了一下，并得到了与您使用不存在的集线器名称相同的行为.

This issue appears to be caused by using an invalid hub name (when using CreateProxy). It is strange that the start method doesn't fail but i just tested this and got the same behavior as you using a non-existent hub name.

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