新建一个self hosted Owin+ SignalR Project(2)

时间：2024-11-28 12:34:44

ASPNET SignalR是为ASP.NET开发人员提供的一个库,可以简化开发人员将实时Web功能添加到应用程序的过程.实时Web功能是指这样一种功能:当所连接的客户端变得可用时服务器代码可以立即向其推送内容,而不是让服务器等待客户端请求的新数据.

这里将重现官网,广播聊天的程序

(参考地址:https://docs.microsoft.com/en-us/aspnet/signalr/overview/getting-started/tutorial-getting-started-with-signalr)

1.添加signalr程序集,打开nuget程序包控制台,输入如下命令:

>install-package microsoft.aspnet.signalr

2.修改Startup.cs ->Configuration方法,如下

     public void Configuration(IAppBuilder app)

        {

            //模仿站点配置

            HttpConfiguration config = new HttpConfiguration();

            //添加站点路由

            config.Routes.MapHttpRoute(

                name: "DefaultApi",

                routeTemplate: "api/{controller}/{action}/{id}", //这里为了类MVC特别加入了{action}

                defaults: new { id = RouteParameter.Optional });

            app.MapSignalR();//添加

            app.UseWebApi(config);

        }

3.新建类ChatHub.cs添加如下代码:

using Microsoft.AspNet.SignalR;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace TestProgram

{

   public class ChatHub:Hub

    {

        public void Send(string name,string message)

        {

            Clients.All.broadcastMessage(name, message);

        }

    }

}

4.修改Index.html如下:

<!doctype html>

<html>

<head>

    <title>signalr simple chat</title>

    <style type="text/css">

        .container {

            background-color: #99ccff;

            border: thick solid #;

            padding: 20px;

            margin: 20px;

        }

    </style>

</head>

<body>

    <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>

    <!--script references. -->

    <!--reference the jquery library. -->

    <script src="getresource?filename=scripts/jquery-1.6.4.min.js"></script>

    <!--reference the signalr library. -->

    <script src="getresource?filename=scripts/jquery.signalr-2.2.2.min.js"></script>

    <!--reference the autogenerated signalr hub script. -->

    <!--这个js是SignalR动态生成的,可以直接访问-->

    <script src="/signalr/hubs"></script>

    <!--add script to update the page and send messages.-->

    <script type="text/javascript">

        $(function () {

            // declare a proxy to reference the hub.

            var chat = $.connection.chatHub;

            // create a function that the hub can call to broadcast messages.

            chat.client.broadcastmessage = function (name, message) {

                // html encode display name and message.

                var encodedname = $('<div />').text(name).html();

                var encodedmsg = $('<div />').text(message).html();

                // add the message to the page.

                $('#discussion').append('<li><strong>' + encodedname

                    + '</strong>:&nbsp;&nbsp;' + encodedmsg + '</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();

                });

            });

        });

    </script>

</body>

</html>

此时,项目结构如下:

新建一个self hosted Owin+ SignalR Project(2)

5.打开浏览器,新建两个标签,输入:http://localhost:9009/index/index,按照提示,操作:

新建一个self hosted Owin+ SignalR Project(2)

两个标签页可以互相实时通讯,实现了客户端到服务端,服务端到所有客户端的调用(RPC 远程过程调用),由于SignalR采用的是长连接webSocket所以,实时性很高!

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