Signalr简单例子
一、需要引用的
Js:
二、编码
用的是signalr2,需要新建Startup.cs类,编码如下:
using Microsoft.Owin; using Owin; using System; using System.Collections.Generic; using System.Linq; using System.Web; [assembly: OwinStartup(typeof(SignalrDemo.Startup))] namespace SignalrDemo { public class Startup { public void Configuration(IAppBuilder app) { app.MapSignalR(); } } }
后台还需要群发消息的ChatHub.cs类,编码如下:
using Microsoft.AspNet.SignalR; using Microsoft.AspNet.SignalR.Hubs; using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace SignalrDemo.Hubs { [HubName("chatHub")] public class ChatHub:Hub { public void AddToRoom(string groupId,string userName) { //将分组Id放到上下文中 Groups.Add(Context.ConnectionId, groupId); //群发人员进入信息提示 Clients.Group(groupId, new string[0]).addUserIn(groupId,userName); } public void Send(string groupId,string detail,string userName) { //Clients.All.addSomeMessage(detail);//群发给所有 //发给某一个组 Clients.Group(groupId, new string[0]).addSomeMessage(groupId, detail,userName); } } }
前端代码如下:
@{ ViewBag.Title = "Index"; Layout = null; } <p> <span>房间号:</span> <input type="text" id="groupId" /> <span>用户名:</span> <input type="text" id="userName" /> <button id="joinRoom">加入聊天室</button> </p> <p> <span>消息:</span> <input type="text" id="message" /> <button id="send">发送</button> </p> <div> <ul id="contentMsg"> </ul> </div> <script src="~/Scripts/jquery-1.8.2.min.js"></script> <script src="~/Scripts/jquery.signalR-2.0.2.min.js"></script> <script src="~/signalr/hubs"></script> <script type="text/javascript"> $(function () { var chat = $.connection.chatHub; chat.hubName = 'chatHub'; chat.connection.start(); chat.client.addSomeMessage = function (groupId, detail,userName) { console.info("广播消息:" + detail); $("#contentMsg").append("<li>" + userName+": " + detail + "</li>"); }; chat.client.addUserIn = function (groupId,userName) { $("#contentMsg").append("<li>" + userName + "进入该聊天室!</li>"); }; $.connection.hub.logging = true;//启动signalr状态功能 //加入聊天室 $("#joinRoom").click(function () { var groupId = $("#groupId").val(); var userName = $("#userName").val(); chat.server.addToRoom(groupId,userName); }); //发送消息 $("#send").click(function () { var detail = $("#message").val(); var groupId = $("#groupId").val(); var userName = $("#userName").val(); chat.server.send(groupId, detail, userName); }); }); </script>
三、注意的地方。
1.在前端页面中引用了
<script src="~/signalr/hubs"></script>这个js。这是在项目中找不到,是有signalr自己生成作为桥接的js。
2.在引用过程中可能会出现一种错误。
“未能加载文件或程序集“Newtonsoft.Json, Version=4.5.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed”或它的某一个依赖项。找到的程序集清单定义与程序集引用不匹配。 (异常来自 HRESULT:0x80131040)”
此时可以尝试下载web.config中加上下面一段:
<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
B:-->
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30AD4FE6B2A6AEED" culture="neutral"/>
<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0"/>
</dependentAssembly>
<!--E-->
</assemblyBinding>
</runtime>