如果我有多个客户端连接到集线器,我将如何使用JavaScript从客户端(.aspx)获取所有连接客户端的详细信息。
在SendChatMessage()
方法中,我必须从客户端(.aspx)传递“who”参数,但是如何才能知道如此多连接的客户端中特定客户端的连接标识或用户名。如何使用SignalR将消息发送到特定客户端
public class Chathub : Hub
{
private readonly static ConnectionMapping<string> _connections =
new ConnectionMapping<string>();
public void SendChatMessage(string who, string message)
{
string name = Context.User.Identity.Name;
foreach (var connectionId in _connections.GetConnections(who))
{
Clients.Client(connectionId).addChatMessage(name + ": "message);
}
}
public override Task OnConnected()
{
string name = Context.User.Identity.Name;
_connections.Add(name, Context.ConnectionId);
return base.OnConnected();
}
public class ConnectionMapping<T>
{
private readonly Dictionary<T, HashSet<string>> _connections =
new Dictionary<T, HashSet<string>>();
public int Count
{
get
{
return _connections.Count;
}
}
public void Add(T key, string connectionId)
{
lock (_connections)
{
HashSet<string> connections;
if (!_connections.TryGetValue(key, out connections))
{
connections = new HashSet<string>();
_connections.Add(key, connections);
}
lock (connections)
{
connections.Add(connectionId);
}
}
}
public IEnumerable<string> GetConnections(T key)
{
HashSet<string> connections;
if (_connections.TryGetValue(key, out connections))
{
return connections;
}
return Enumerable.Empty<string>();
}
不应该在这个问题上添加C#标签吗?它似乎与JavaScript相关。 – evolutionxbox