javascript 如何在 SignalR 上获取已连接客户端的列表
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How to get a list of connected clients on SignalR
提问by Crime Master Gogo
I am quite new to SignalR. My first assignment is to make simple chat app.
我对 SignalR 很陌生。我的第一个任务是制作简单的聊天应用程序。
I have been browsing and reading and finally made a page where you come and chat and it works fine.
我一直在浏览和阅读，最后制作了一个页面，您可以在这里聊天，并且效果很好。
Now I need to show a list of connected clients. To achieve this I have wrote the following code. This is my HUB.
现在我需要显示已连接客户端的列表。为了实现这一点，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;
}
}
And thats it...Now what?? Am I going to the right direction? If, I am then how to call this methods from the view? Some good suggestions will really help me out. cheers
就是这样......现在呢？？我会朝着正确的方向前进吗？如果，我又如何从视图中调用此方法？一些好的建议会真正帮助我。干杯
EDIT:
编辑：
I have added the following script when the hub start
我在集线器启动时添加了以下脚本
$.connection.hub.start(function () {
chat.getConnectedUsers();
});
This is the method that returns the client names in my Hub
这是在我的集线器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;
}
in firebug i can see it returns something as follows;
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}
But, how would I display that in my view??
但是，我将如何在我的视图中显示它？
EDIT:
编辑：
this the complete view so far
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>
Problem: don't see anything here: $('#clientList').html(data.Result[0].FullName); firebug says 'data is not defined'
问题：这里什么也没看到：$('#clientList').html(data.Result[0].FullName); 萤火虫说“数据未定义”
采纳答案by dove
JavaScript
JavaScript
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;
}
Once hub is started chats would have all the public functions of your hub available as javascript functions. This is what the signalr/hubs creates using the best available connection method between client and server.
一旦集线器启动，聊天将把集线器的所有公共功能都作为 javascript 函数使用。这是信号器/集线器使用客户端和服务器之间的最佳可用连接方法创建的内容。
In reverse your C# hub will have access to any javascripts functions you setup, e.g.
反过来，您的 C# 集线器将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 - you might also consider using OnConnectedAsync, though of course you might still persist these. I'm also waiting for full support for web farm support using sql, which is in the pipeline.
ps - 你也可以考虑使用OnConnectedAsync，当然你可能仍然坚持这些。我也在等待对使用 sql 的 Web 场支持的全面支持，该支持正在筹备中。
