Singalr初学

   [HubName("djwChat")]
    public class ChatHub:Hub
    {
        public void Send(string name)
        {
            //动态表达式
            Clients.All.addMsgToPage(name);
                      
        }

    }

owin配置非常重要。

[assembly: OwinStartup(typeof(SingalRTest.Startup))]
namespace SingalRTest
{

    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {           
            app.MapSignalR();
        }
    }
}

  <appSettings>
    <add key="webpages:Version" value="2.0.0.0" />
    <add key="webpages:Enabled" value="false" />
    <add key="PreserveLoginUrl" value="true" />
    <add key="ClientValidationEnabled" value="true" />
    <add key="UnobtrusiveJavaScriptEnabled" value="true" />
    <add key="owin:AppStartup" value="SingalRTest.Startup, SingalRTest" />
    <!--<add key="owin:AutomaticAppStartup" value="true" />-->
  </appSettings>

如果没有

[assembly: OwinStartup(typeof(SingalRTest.Startup))]，需要在appSettings里配置节点

        $(function () {

            //创建代理
            var chat = $.connection.djwChat;

            chat.client.addMsgToPage = function () {
                //2、服务端通知客户端 do something 
            };

            $("#send").click(function () {
                chat.server.send("msg");
                //1、发送消息到服务端，调用服务端的Send方法
            });

            $.connection.hub.start();

        });

 PersistentConnection长连接类的使用方法

public class MyConnection:PersistentConnection
    {
        protected override System.Threading.Tasks.Task OnReceived(IRequest request, string connectionId, string data)
        {
             data = string.Format("数据是:{0} 时间是:{1}", data, DateTime.Now.ToString());
             return Connection.Send(connectionId, data);
        }
    }

同样是owin启动配置

[assembly: OwinStartup(typeof(SingalRTest.Startup))]
namespace SingalRTest
{

    public class Startup
    {
        public void Configuration(IAppBuilder app)
        {
            // Any connection or hub wire up and configuration should go here 
            //app.MapSignalR();
            
            app.MapSignalR<MyConnection>("/随便写");//必须是/开头，自定义路径。
        }
    }
}

    <script type="text/javascript">
        $(function () {
            
            var connection = $.connection('/随便写');//保持和后台自定义路径相同
            connection.received(function (data) {
                $('#messages').append('<li>' + data + '</li>');
            });

            connection.start();

            $("#broadcast").click(function () {
                connection.send($('#msg').val());
            });
            $("#btnStop").click(function () {
                connection.stop();
            });
        });

    </script>