使用 SignalR、WCF 双工服务和 ASP.Net 通用处理程序向客户端推送通知？

Question

我应该使用开发的 WCF 双工服务将文件发送到指定的 IP 地址， 所以我有一些回调操作，它们应该用作客户端的通知，我得出这个结论是使用 SignalR，但我是 SignalR 的新手，因为这个原因实际上并不知道 SignalR 是否适合这样做.

让我们看看我正在处理哪些代码，在 ASP.Net 通用处理程序中我的“SendToServer”操作并使用 WCF 客户端代理如下：

SendClient sendClient = new SendClient(new SendCallback(),new System.ServiceModel.NetTcpBinding(),new System.ServiceModel.EndpointAddress(endPointAddress)); 
        sendClient.OperationFailed += sendClient_OperationFailed;
        sendClient.OperationTimedOut += sendClient_OperationTimedOut;
        sendClient.SendingFinished += sendClient_SendingFinished;
        sendClient.ConnectionClosed += sendClient_ConnectionClosed;
        sendClient.ConnectionRefused += sendClient_ConnectionRefused;
        sendClient.InstanceStored += sendClient_InstanceStored;
sendClient.Send(/*Array of resources ids*/,  /*Server instance*/);

我的事件处理程序如下：

public void sendClient_InstanceStored(object sender, int currentInstance, int totalInstance, int currentStudy, int TotalStudy)
    { 
        //Get fired when one file successfully sent
    } 
    public void sendClient_ConnectionRefused(object sender, EventArgs e)
    {
        //Connection refused
    }

    public void sendClient_ConnectionClosed(object sender, EventArgs e)
    {
        //Connection closed
    }

    public void sendClient_SendingFinished(object sender, EventArgs e)
    {
        //Sending finished
    }

    public void sendClient_OperationTimedOut(object sender, EventArgs e)
    {
        //Operation timed out
    }

    public void sendClient_OperationFailed(object sender, EventArgs e)
    {
        //Operation failed
    }

在JS中调用这个动作如下：

 $.ajax({
            cache: false,
            type: "POST",
            url: '../Handlers/Study/Send.ashx',
            dataType: "json",
            data: {
                Action: "SendToServer",
                Hostname: DeviceHostname, Port: DevicePort, Description: Description, Ids2Send: JSON.stringify(rows)
            },
            async: true,
            success: function (data) {
                if (data.Success == false) {
                    $("#loader-Send").remove();
                    $(".ui-dialog-buttonpane button:contains('Send')").button("enable");
                    showNoticeMessage("Can not send to Server!");
                    return;
                }
            },
            error: function (x, e) {
                $("#loader-Send").remove();
                $(".ui-dialog-buttonpane button:contains('Send')").button("enable");
                showNoticeMessage("Can not send to Server!");
            }
        });

是否可以在启动$.ajax 后在客户端使用该事件处理程序作为 SignalR 的通知？

或

还有其他方法可以在不使用 SignalR 的情况下执行此操作吗？

提前致谢。

Answer 1

如果有人需要这里是解决方案：

1-应该安装SignalR。

2- 创建一个Owin 启动类，例如：

   public class Startup
{
    public void Configuration(IAppBuilder app)
    {
        // For more information on how to configure your application, visit http://go.microsoft.com/fwlink/?LinkID=316888
        app.MapSignalR();
    }
}

3- 定义和实现您自己的通知类，例如：

[HubName("sendNotifier")]
public class SendNotifier : Hub
{
    public string CurrentConnectionID { get; set; }
    public void SendStarted()
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).sendStarted();
    }
    public void SendFailed()
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).sendFailed();
    }
    public void InstanceStored(int currentInstance, int totalInstance, int currentStudy, int totalStudy)
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).instanceStored(currentInstance, totalInstance, currentStudy, totalStudy);
    }
    public void SendFinished()
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).sendFinished();
    }
    public void ConnectionClosed()
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).connectionClosed();
    }
    public void ConnectionTimedOut()
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).connectionTimedOut();
    }
    public void ConnectionRefused()
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).connectionRefused();
    }

    public void ConnectionFailed()
    {
        var context = GlobalHost.ConnectionManager.GetHubContext<SendNotifier>();
        if (CurrentConnectionID != null)
            context.Clients.Client(CurrentConnectionID).connectionFailed();
    }
}

4- 例如，在事件处理程序中，我们可以调用通知方法

 public void sendClient_ConnectionEstablished(object sender, EventArgs e)
    {
        SendNotifier sendNotifier = new SendNotifier();
        sendNotifier.CurrentConnectionID = ClientID;
        sendNotifier.SendStarted();
    }

注意：我在 Ajax 请求中传递了 ClientID。

和客户端代码：

 var hub = $.connection.sendNotifier;
    hub.client.sendStarted = function () {

    };

    hub.client.sendFinished = function () {
    };

    hub.client.sendFailed = function () {
    };
    //var temp;
    hub.client.instanceStored = function (currentInstance, totalInstance, currentStudy, totalStudy) {
    };

    hub.client.connectionClosed = function () {
    };

    hub.client.connectionTimedOut = function () {
    };

    hub.client.connectionRefused = function () {
    };

    hub.client.connectionFailed = function () {
    };

    $.connection.hub.logging = true;
    $.connection.hub.start().done(function () {
    });

还有ClientID：ClientID: $.connection.hub.id

SignalR 和它的东西应该在页面头部引用。