前言
交流群:195866844
上周发表了
用SignalR 2.0开发客服系统[系列1:实现群发通讯]
这篇文章,得到了很多帮助和鼓励,小弟在此真心的感谢大家的支持..
这周继续系列2,实现聊天室的功能.
开发环境
开发工具:VS2013 旗舰版
数据库:未用
操作系统:WIN7旗舰版
正文开始
首先我们来看看最终效果:
正式开始:
SignalR作为一个强大的集线器,已经在hub里面集成了Gorups,也就是分组管理,使用方法如下:
代码语言：javascript复制//作用:将连接ID加入某个组
//Context.ConnectionId 连接ID,每个页面连接集线器即会产生唯一ID
//roomName分组的名称
Groups.Add(Context.ConnectionId, roomName);
//作用:将连接ID从某个分组移除
Groups.Remove(Context.ConnectionId, roomName);
//作用:调用分组内连接对象注册的本地JS
//XXX:本地JS名称
//Room:分组名称
// new string[0]:过滤(不发送)的连接ID数组
Clients.Group(Room, new string[0]).XXXX其实SignalR已经帮我们封装的很好了,关键代码其实就这三句..
废话不多说,下面开始讲我的实现.
首先实体类(参考微软Demo):
代码语言：javascript复制using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Data.Entity;
using System.ComponentModel.DataAnnotations;
using Microsoft.AspNet.SignalR;
namespace SignalRTest
{
public class UserContext
{
public UserContext()
{
Users = new List<User>();
Connections = new List<Connection>();
Rooms = new List<ConversationRoom>();
}
//用户集合
public List<User> Users { get; set; }
//连接集合
public List<Connection> Connections { get; set; }
//房间集合
public List<ConversationRoom> Rooms { get; set; }
}
public class User
{
[Key]
//用户名
public string UserName { get; set; }
//用户的连接
public List<Connection> Connections { get; set; }
//用户房间集合
public virtual List<ConversationRoom> Rooms { get; set; }
public User()
{
Connections = new List<Connection>();
Rooms = new List<ConversationRoom>();
}
}
public class Connection
{
//连接ID
public string ConnectionID { get; set; }
//用户代理
public string UserAgent { get; set; }
//是否连接
public bool Connected { get; set; }
}
/// <summary>
/// 房间类
/// </summary>
public class ConversationRoom
{
//房间名称
[Key]
public string RoomName { get; set; }
//用户集合
public virtual List<User> Users { get; set; }
public ConversationRoom()
{
Users = new List<User>();
}
}
}然后聊天室的Hub(这里我就不解释了,每句话我都加了注释,注释 代码方便大家理解..):
代码语言：javascript复制using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Microsoft.AspNet.SignalR;
using System.Threading.Tasks;
using Microsoft.AspNet.SignalR.Hubs;
using Newtonsoft.Json;
namespace SignalRTest
{
[HubName("groupsHub")]
public class GroupsHub : Hub
{
public static UserContext db = new UserContext();
public void Hello()
{
Clients.All.hello();
}
/// <summary>
/// 重写Hub连接事件
/// </summary>
/// <returns></returns>
public override Task OnConnected()
{
// 查询用户。
var user = db.Users.SingleOrDefault(u => u.UserName == Context.ConnectionId);
//判断用户是否存在,否则添加
if (user == null)
{
user = new User()
{
UserName = Context.ConnectionId
};
db.Users.Add(user);
}
//发送房间列表
var itme = from a in db.Rooms
select new { a.RoomName };
Clients.Client(this.Context.ConnectionId).getRoomlist(JsonConvert.SerializeObject(itme.ToList()));
return base.OnConnected();
}
/// <summary>
/// 更新所有用户的房间列表
/// </summary>
private void GetRoomList()
{
var itme = from a in db.Rooms
select new { a.RoomName };
string jsondata = JsonConvert.SerializeObject(itme.ToList());
Clients.All.getRoomlist(jsondata);
}
/// <summary>
/// 重写Hub连接断开的事件
/// </summary>
/// <returns></returns>
public override Task OnDisconnected()
{
var user = db.Users.Where(u => u.UserName == Context.ConnectionId).FirstOrDefault();
//判断用户是否存在,存在则删除
if (user != null)
{
//删除用户
db.Users.Remove(user);
// 循环用户的房间,删除用户
foreach (var item in user.Rooms)
{
RemoveFromRoom(item.RoomName);
}
}
return base.OnDisconnected();
}
/// <summary>
/// 加入聊天室
/// </summary>
/// <param name="roomName"></param>
public void AddToRoom(string roomName)
{
//查询聊天室
var room = db.Rooms.Find(a=>a.RoomName==roomName);
//存在则加入
if (room != null)
{
//查找房间中是否存在此用户
var isuser = room.Users.Where(a => a.UserName == Context.ConnectionId).FirstOrDefault();
//不存在则加入
if (isuser == null)
{
var user = db.Users.Find(a => a.UserName == Context.ConnectionId);
user.Rooms.Add(room);
room.Users.Add(user);
Groups.Add(Context.ConnectionId, roomName);
//调用此连接用户的本地JS(显示房间)
Clients.Client(Context.ConnectionId).addRoom(roomName);
}
else
{
Clients.Client(Context.ConnectionId).showMessage("请勿重复加入房间!");
}
}
}
/// <summary>
/// 创建聊天室
/// </summary>
/// <param name="roomName"></param>
public void CreatRoom(string roomName)
{
var room = db.Rooms.Find(a => a.RoomName == roomName);
if (room == null)
{
ConversationRoom cr = new ConversationRoom()
{
RoomName = roomName
};
//将房间加入列表
db.Rooms.Add(cr);
AddToRoom(roomName);
Clients.Client(Context.ConnectionId).showMessage("房间创建完成!");
GetRoomList();
}
else
{
Clients.Client(Context.ConnectionId).showMessage("房间名重复!");
}
}
/// <summary>
/// 退出聊天室
/// </summary>
/// <param name="roomName"></param>
public void RemoveFromRoom(string roomName)
{
//查找房间是否存在
var room = db.Rooms.Find(a => a.RoomName == roomName);
//存在则进入删除
if (room != null)
{
//查找要删除的用户
var user = room.Users.Where(a => a.UserName == Context.ConnectionId).FirstOrDefault();
//移除此用户
room.Users.Remove(user);
//如果房间人数为0,则删除房间
if (room.Users.Count <= 0)
{
db.Rooms.Remove(room);
}
Groups.Remove(Context.ConnectionId, roomName);
//提示客户端
Clients.Client(Context.ConnectionId).removeRoom("退出成功!");
}
}
/// <summary>
/// 给分组内所有的用户发送消息
/// </summary>
/// <param name="Room">分组名</param>
/// <param name="Message">信息</param>
public void SendMessage(string Room, string Message)
{
Clients.Group(Room, new string[0]).sendMessage(Room,Message " " DateTime.Now.ToString());
}
}
}前端HTML JS:
代码语言：javascript复制<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script src="Scripts/jquery-1.10.2.min.js"></script>
<script src="Scripts/jquery.signalR-2.0.0.min.js"></script>
<!--这里要注意,这是虚拟目录,也就是你在OWIN Startup中注册的地址-->
<script src="signalr/hubs"></script>
<script>
var chat
var roomcount = 0;
$(function () {
chat = $.connection.groupsHub;
chat.client.showMessage = function (Message) {
alert(Message);
}
chat.client.sendMessage = function (roomname, message) {
$("#" roomname).find("ul").each(function () {
$(this).append('<li>' message '</li>')
})
}
chat.client.removeRoom = function (data) {
alert(data);
}
chat.client.addRoom = function (roomname) {
var html = '<div style="float:left; margin-left:30px; border:double" id="' roomname '" roomname="' roomname '"><button onclick="RemoveRoom(this)">退出</button>
' roomname '房间
聊天记录如下:<ul>
</ul>
<input type="text" /> <button onclick="SendMessage(this)">发送</button>
</div>'
$("#RoomList").append(html);
}
//注册查询房间列表的方法
chat.client.getRoomlist = function (data) {
if (data) {
var jsondata = $.parseJSON(data);
$("#roomlist").html(" ");
for (var i = 0; i < jsondata.length; i ) {
var html = ' <li>房间名:' jsondata[i].RoomName '<button roomname="' jsondata[i].RoomName '" onclick="AddRoom(this)">加入</button></li>';
$("#roomlist").append(html);
}
}
}
// 获取用户名称。
$('#username').html(prompt('请输入您的名称:', ''));
$.connection.hub.start().done(function () {
$('#CreatRoom').click(function () {
if (roomcount < 2) {
chat.server.creatRoom($("#Roomname").val());
roomcount ;
} else {
alert("聊天窗口只允许有2个")
}
})
});
});
function SendMessage(btn) {
var message = $(btn).prev().val();
var room = $(btn).parent();
var username = $("#username").html();
message = username ":" message;
var roomname = $(room).attr("roomname");
chat.server.sendMessage(roomname,message);
}
function RemoveRoom(btn) {
var room = $(btn).parent();
var roomname = $(room).attr("roomname");
chat.server.removeFromRoom(roomname);
}
function AddRoom(roomname) {
var data =$(roomname).attr("roomname");
chat.server.addToRoom(data);
}
</script>
</head>
<body>
<div>
<div>名称:<p id="username"></p></div>
输入房间名:
<input type="text" value="asdasd" id="Roomname" />
<button id="CreatRoom">创建聊天室</button>
</div>
<div style="float:left;border:double">
<div>房间列表</div>
<ul id="roomlist">
</ul>
</div>
<div id="RoomList">
</div>
</body>
</html>至此就完成了基本的聊天室功能,有许多逻辑写的不到位的情况,请大家海涵.
我会坚持写完本系列..
源码下载地址:
http://pan.baidu.com/s/1pJLxwF5
