如何在SignalR上获取已连接客户端的列表

Question

我是SignalR的新手.我的第一个任务是制作简单的聊天应用.

我一直在浏览和阅读,最后做了一个页面,你来聊天,它工作正常.

现在我需要显示已连接客户端的列表.为此,我编写了以下代码.这是我的HUB.

public class ChatHub: Hub
{

    chatEntities dc = new chatEntities();
    public void Send(string message,string clientName)
    {
        Clients.addMessage(message,clientName);

    }

    // I want to save the user into my database, when they join 
    public void Joined(string userId,string userName)
    {

        CurrentChattingUsers cu = new CurrentChattingUsers();
        cu.ConnectionId = userId;
        cu.UserName = userName;

        dc.CurrentChattingUsers.AddObject(cu);
        dc.SaveChanges();


       Clients.joins(userId, userName);
    }

    // This will return a list of connected user from my db table.
    public List<ClientModel> GetConnectedUsers()
    {
        var query = (from k in dc.CurrentChattingUsers
                     select new ClientModel()
                     {
                         FullName = k.UserName,
                         UserId = k.ConnectionId
                     }).ToList();
        return query;
    }   


}

那就是它......现在是什么？我会朝着正确的方向前进吗？如果,那么我是如何从视图中调用此方法的呢？一些好的建议真的会帮助我.干杯

编辑:

我在集线器启动时添加了以下脚本

$.connection.hub.start(function () {
            chat.getConnectedUsers();

        });

这是在我的Hub中返回客户端名称的方法

  public List<ClientModel> GetConnectedUsers()
    {
        var data = (from k in dc.Users
                     select new ClientModel()
                     {
                         FullName = k.UserName

                     }).ToList();

         Clients.loadUsers(data);
        return data;
    }

在萤火虫中,我可以看到它返回如下内容;

{"State":{},"Result":[{"FullName":"mokarom","UserId":null},  {"FullName":"aka8000","UserId":null},{"FullName":"johnnyno5","UserId":null},{"FullName":"reza","UserId":null},{"FullName":"amyo","UserId":null},{"FullName":"rezatech","UserId":null}],"Id":"0","Error":null,"StackTrace":null}

但是,我如何在我的视图中显示？

编辑:

这是迄今为止的完整视图

<script type="text/javascript">
    var chat;
    var myClientName
    $(document).ready(function(){

      myClientName = '@Request.Cookies["ChatterName"].Value';


        // Created proxy
        chat = $.connection.chatHub;
        // Assign a function to be called by the server
        chat.addMessage = onAddMessage;

        // Register a function with the button click
        $("#broadcast").click(onBroadcast);


        $('#message').keydown(function (e) {
            if (e.which == 13) { //Enter
                e.preventDefault();

                onBroadcast();

            }
        });

        // Start the connection
        $.connection.hub.start(function () {
           chat.getConnectedUsers();

        });

        chat.loadUsers = function (data) {
            loadUsers(data); 

         };
    });


    function onAddMessage(message,clientName) {
        // Add the message to the list
        $('#messages').append('<div class="chatterName">' + clientName + ' </div><div class="chatterMessage"> ' + message + '</div><div class="clear">');

    }
    function onBroadcast() {
        // Call the chat method on the server
        chat.send($('#message').val(), myClientName);
        $('#message').val('');
    }
    function loadUsers(data) {
        $('#clientList').html(data.Result[0].FullName);

    }
</script>

问题:这里看不到任何内容:$('#clientList').html(data.Result [0] .FullName); 萤火虫说"数据没有定义"

Answer 1

JavaScript的

var chats = $.connection.chatHub;
chats.loadUsers = function (data) { loadUsers(data); };
var connectedUserCount = 0;

$.connection.hub.start(function () 
         { chats.getConnectedUsers(); });

function loadUsers =  = function (data) {
  console.log(data); //so you can see your data in firebug.etc
            //which signal r will have converted to json so you could try
  var numberOfUsers = data.length;  
}

启动集线器后,聊天会将集线器的所有公共功能作为javascript函数提供.这是信号器/集线器使用客户端和服务器之间最佳可用连接方法创建的内容.

反过来,您的C#中心可以访问您设置的任何javascripts函数,例如

Clients.loadUsers(query);  
//add this to you server side just before you return query

ps - 你也可以考虑使用OnConnectedAsync,当然你可能仍然坚持这些.我使用的是SQL,这是在还等全面支持Web场支持管道.