如何使用SignalR保存数据?

时间:2014-07-22 00:02:48

标签: c# signalr signalr-hub

我想使用SignalR保存数据。例如,

public void ReservationOpened(long contractId, string username)
{
    // Save the contractId somewhere, that we can access it later. Let's call it ListOfOpenedIds
    Clients.All.reservationOpened(contractId, username);
}

public void ReservationClosed(long contractId)
{
    // look in ListOfOpenIds for contractId, and then remove it.
    Clients.All.reservationClosed(contractId);
} 

我怎样才能做到这一点?我听说不推荐使用SessionR。所以我想我不会使用Http.Current.Context.Session。

至于数据库方法,我不喜欢每次打开/关闭时使用dbWrite / dbRead的事实。

有人可以告诉我如何做到这一点吗?如果数据库方法是最好的方法,我应该在哪里初始化数据库连接?

1 个答案:

答案 0 :(得分:0)

您可以将此数据存储在静态变量中。它将具有全局范围,并非每个用户都是唯一的,但如果您使用字典,则可以根据连接ID查找用户(会话)数据。

我使用会话管理器单例类,其中两个字典将连接ID​​映射到会话数据,将用户名映射到会话数据。这允许我通过连接ID识别连接用户,并在向特定用户发送消息时查找相关的连接ID。

“会话数据”类:

public class Player
{
    public Player()
    {
        ConnectionIDs = new List<string>();
    }
    public List<string> ConnectionIDs { get; set; }
    public string Name { get; set; }
    public string username { get; set; }
}

“会话管理员”课程:

public class Lobby
{
    private Lobby()
    {
        playersByUsername = new Dictionary<string, Player>();
        playersByConnectionID = new Dictionary<string, Player>();
    }

    private static Lobby singleton;
    public static Lobby Get()
    {
        if (singleton == null)
            singleton = new Lobby();

        return singleton;
    }

    Dictionary<string, Player> playersByUsername;
    Dictionary<string, Player> playersByConnectionID;

    public Player GetPlayerByUsername(string username)
    {
        if (playersByUsername.ContainsKey(username))
            return playersByUsername[username];

        return null;
    }

    public Player GetPlayerByConnectionID(string connectionID)
    {
        if (playersByConnectionID.ContainsKey(connectionID))
            return playersByConnectionID[connectionID];

        return null;
    }

    public void NewPlayer(Player player)
    {
        playersByUsername.Add(player.username, player);
        foreach (string connectionID in player.ConnectionIDs)
            playersByConnectionID.Add(connectionID, player);
    }

    public void NewConnection(string username, string connectionID)
    {
        playersByConnectionID.Add(connectionID, playersByUsername[username]);
        playersByUsername[username].ConnectionIDs.Add(connectionID);
    }

}