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我有Web应用项目和一个角度2项目。 我想用SignalR从服务器发送消息。 然后我发现这个article实施它。 但我不知道如何发送消息给当前用户。SignalR Web API向当前用户发送消息
代码发送消息C#:
public class EventHub : Hub
{
public async Task Subscribe(string channel)
{
await Groups.Add(Context.ConnectionId, channel);
var @event = new ChannelEvent
{
Name = $"{Context.ConnectionId} subscribed",
Data = new
{
Context.ConnectionId,
ChannelName = channel
}
};
await Publish(@event);
}
public async Task Unsubscribe(string channel)
{
await Groups.Remove(Context.ConnectionId, channel);
var @event = new ChannelEvent
{
Name = $"{Context.ConnectionId} unsubscribed",
Data = new
{
Context.ConnectionId,
ChannelName = channel
}
};
await Publish(@event);
}
public Task Publish(ChannelEvent channelEvent)
{
Clients.Caller.OnEvent(Constants.AdminChannel, channelEvent);
return Task.FromResult(0);
}
public override Task OnConnected()
{
var @event = new ChannelEvent
{
Name = $"{Context.ConnectionId} connected",
Data = new
{
Context.ConnectionId,
}
};
Publish(@event);
return base.OnConnected();
}
public override Task OnDisconnected(bool stopCalled)
{
var @event = new ChannelEvent
{
Name = $"{Context.ConnectionId} disconnected",
Data = new
{
Context.ConnectionId,
}
};
Publish(@event);
return base.OnDisconnected(stopCalled);
}
}
public static class Constants
{
public const string AdminChannel = "admin";
public const string TaskChannel = "tasks";
}
public class ChannelEvent
{
public string Name { get; set; }
public string ChannelName { get; set; }
public DateTimeOffset Timestamp { get; set; }
public object Data
{
get { return _data; }
set
{
_data = value;
Json = JsonConvert.SerializeObject(_data);
}
}
private object _data;
public string Json { get; private set; }
public ChannelEvent()
{
Timestamp = DateTimeOffset.Now;
}
}
然后在我的控制,我创建IhubContent
private readonly IHubContext _context = GlobalHost.ConnectionManager.GetHubContext<EventHub>();
,并调用我的发布事件:
private void PublishEvent(string eventName, StatusModel status)
{
_context.Clients.Group(Constants.TaskChannel).OnEvent(Constants.TaskChannel, new ChannelEvent
{
ChannelName = Constants.TaskChannel,
Name = eventName,
Data = status
});
}
但这个消息发送给所有用户。帮助我解决这个问题,并将代码发送到发送消息给当前用户。
userId你的意思是Context.ConnectionId?还是其他的? –
错误的拼写错误,您必须使用'Client'方法来用其connectionId来访问用户;用户名可以用于用户名[用户名](http://www.asp.net/signalr/overview/guide-to-the-api/mapping-users-to-connections) – bsoulier