public override async Task OnDisconnectedAsync(Exception exception)
{
await Groups.RemoveFromGroupAsync(Context.ConnectionId, "SignalR Users");
await base.OnDisconnectedAsync(exception);
NLogHelp.InfoLog($"SignalR连接断开，连接Id:{Context.ConnectionId}");
}
public override async Task OnConnectedAsync()
{
await Groups.AddToGroupAsync(Context.ConnectionId, "SignalR Users");
await base.OnConnectedAsync();
NLogHelp.InfoLog($"新的SignalR连接建立，连接Id:{Context.ConnectionId}");
}