Asp.net 信号R库.我看不到我的聊天记录，我只想与 1 个用户聊天，我和另一个用户聊天

Question

我正在使用 asp.net 信号R库。以及如何使我只能与一个人聊天而不是群聊可以使用 asp.net 信号R库吗？

另外，我想在不保存数据库的情况下查看聊天记录，是否可以将聊天记录广泛投射给特定用户？

类文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Microsoft.AspNet.SignalR;
namespace Chat.Hubs
{
    public class ChatHub : Hub
    {
        public void Send(string name, string message)
        {
            // Call the addNewMessageToPage method to update clients.
            Clients.All.addNewMessageToPage(name, message);
        }
    }
}

///视图

@{
    ViewBag.Title = "Chat";
}
<h2>Chat</h2>
<div class="container">
    <input type="text" id="message" />
    <input type="button" id="sendmessage" value="Send" />
    <input type="hidden" id="displayname" />
    <ul id="discussion">
    </ul>
</div>
@section scripts {
    <!--Script references. -->
    <!--The jQuery library is required and is referenced by default in _Layout.cshtml. -->
    <!--Reference the SignalR library. -->
    <script src="@Url.Content("~/Scripts/jquery.signalR-1.1.3.min.js")"></script>
    <!--Reference the autogenerated SignalR hub script. -->
    <script src="~/signalr/hubs"></script>
    <!--SignalR script to update the chat page and send messages.--> 
    <script>
        $(function () {
            // Reference the auto-generated proxy for the hub.  
            var chat = $.connection.chatHub;
            // Create a function that the hub can call back to display messages.
            chat.client.addNewMessageToPage = function (name, message) {
                // Add the message to the page. 
                $('#discussion').append('<li><strong>' + htmlEncode(name) 
                    + '</strong>: ' + htmlEncode(message) + '</li>');
            };
            // Get the user name and store it to prepend to messages.
            $('#displayname').val(prompt('Enter your name:', ''));
            // Set initial focus to message input box.  
            $('#message').focus();
            // Start the connection.
            $.connection.hub.start().done(function () {
                $('#sendmessage').click(function () {
                    // Call the Send method on the hub. 
                    chat.server.send($('#displayname').val(), $('#message').val());
                    // Clear text box and reset focus for next comment. 
                    $('#message').val('').focus();
                });
            });
        });
        // This optional function html-encodes messages for display in the page.
        function htmlEncode(value) {
            var encodedValue = $('<div />').text(value).html();
            return encodedValue;
        }
    </script>
}

Answer 1

要向特定用户发送消息，您可以使用 Clients.Client 方法，例如：

Clients.Client(someClientsConnectionId).foo();

要检索客户端连接 ID，您可以捕获它 Context.ConnectionId。 因此，您的中心可能看起来像这样，以跟踪用户并专门发送给他们。

public MyHub: Hub 
{
    private static readonly ConcurrentDictionary<string, string> _users = new ConcurrentDictionary<string, string>();
...
    public void Join(string userName)
    {
        _users[theUsersUserName] = Context.ConnectionId;
    }
    public void SendToUser(string userName, string message)
    {
        Clients.Client(_users[userName]).foo(message).
    }
...
}