c# - 来自客户端的集线器方法未在 ASP.NET Core SignalR 中调用

Question

我正在将 SignalR 添加到我的应用中。我可以从服务器向客户端发送消息，但不能从客户端调用集线器方法。这是我的集线器界面:

public interface IGeneralHub
{
    Task BroadcastMessage(HubMessage msg); //string type, string payload);
    Task JoinHub(List<int> ids);
}

和中心客户端:

public class AuctionHub : Hub<IGeneralHub>
{
    public void Broadcast(HubMessage msg)
    {
        Clients.All.BroadcastMessage(msg);
    }
    public void JoinHub(List<int> ids)
    {
        foreach (var id in ids.Distinct())
            Groups.AddToGroupAsync(Context.ConnectionId, id.ToString());
    }
}

和客户端:

this.hubConnections = new signalR.HubConnectionBuilder()
                    .withUrl(`${environment.hubHost}/document/`)
                    .build();

this.hubConnections.start()
                    .then(() => console.log('Connection started'))
                    .catch(err => console.log('Error while starting connection: ' + err));

this.hubConnections.invoke('joinGroup', JSON.parse(localStorage.getItem('ws-document')));

我收到消息，但从未调用过 joinGroup。我做错了什么？

Answer 1

I receive messages, but joinGroup is never called. What am I doing wrong?

这是因为您的 AuctionHub 类中没有 JoinGroup 方法。它应该 JoinHub 而不是如下所示:

this.hubConnections.invoke('joinHub', JSON.parse(localStorage.getItem('ws-document')));