c# – SignalR页面刷新使多个连接

2019年7月2日 388次阅读

我想使用SignalR在客户端上显示一些实时随机数据.

Problem Is whenever I refresh the page it creates one more connection
and shows multiple data.

大多数情况下,我认为我的方法是错的.

所以我做了什么.

步骤1：使用Nuget Install-Package Microsoft.AspNet.SignalR安装SignalR

第2步：在Startup.cs文件中进行如下更改.

public partial class Startup
{
    public void Configuration(IAppBuilder app)
    {
        ConfigureAuth(app);
        app.MapSignalR(); //Added this line for SignalR
    }
}

第3步：创建Hub类. “ServerStatisticsHub.cs”

public class ServerStatisticsHub : Hub
{
    public void ServerParameter()
    {
        Random r = new Random();
        int p = 0;
        int m = 0;
        int s = 0;

        while(true) //May be this is the foolish thing I'm doing
        {
            p = r.Next(0, 100);
            m = r.Next(0, 100);
            s = r.Next(0, 100);
            Clients.All.broadcastServerStatistics("{\"processor\":" + p + ", \"memory\":" + m + ", \"storage\":" + s + "}");
            System.Threading.Thread.Sleep(2000);
        }
    }
}

第4步：在Home“ServerState.cshtml”中创建一个视图.

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" name="viewport">
    <title>TestSignalR</title>
</head>
<body>
    <div id="serverProcessor"></div>
    <div id="serverMemory"></div>
    <div id="serverStorage"></div>

    <script src="@Url.Content("~/Scripts/jquery-2.2.3.min.js")"></script>    
    <script src="@Url.Content("~/Scripts/jquery.signalR-2.2.1.min.js")"></script>
    <script src="@Url.Content("~/signalr/hubs")"></script>
    <script>
        $(function () {
            // Reference the auto-generated proxy for the hub.
            var serverStatistics = $.connection.serverStatisticsHub;

            // Create a function that the hub can call back to display messages.
            serverStatistics.client.broadcastServerStatistics = function (serverStat) {
                var serverStatistic = JSON.parse(serverStat);
                console.log(serverStatistic);

                $('#serverProcessor').html(serverStatistic.processor + "%");
                $('#serverMemory').html(serverStatistic.memory + "%");
                $('#serverStorage').html(serverStatistic.storage + "%");
            };

            // Start the connection.
            $.connection.hub.start().done(function () {
                serverStatistics.server.serverParameter();
            });
        });

    </script>
</body>
</html>

最佳答案 我找到了解决此问题的解决方法.

我不知道如何描述它.

在Hub类文件中完成以下代码更改. “ServerStatisticsHub.cs”

Clients.Client(Context.ConnectionId).broadcastServerStatistics("{\"processor\":" + p + ", \"memory\":" + m + ", \"storage\":" + s + "}");

变

Clients.All.

至

Clients.Client(Context.ConnectionId).

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