[英]Communication between WPF and hosted WCF Service
I have a console app that starts a WCF service and a small WPF app. 我有一个启动WCF服务的控制台应用程序和一个小型WPF应用程序。 I'm trying to show a messagebox in the WPF app whenever a method on the WCF service is called for testing purposes.
每当试图出于测试目的而调用WCF服务上的方法时,我都试图在WPF应用程序中显示一个消息框。 I have based my code on this answer but the synchronizationContext is null.
我已经基于此答案编写了代码,但笔者的conferenceContext为空。 How do i fix this?
我该如何解决? Or are there other/better ways to make this happen?
还是有其他/更好的方法来实现这一目标?
Use SignalR . 使用SignalR 。 Lots of info here and here .
在这里和这里有很多信息。 This article also looks very good.
这篇文章看起来也很好。
As for actual code, create a WCF service and use NuGet to add a reference to SignalR, then add a hub class: 对于实际代码,创建WCF服务并使用NuGet添加对SignalR的引用,然后添加中心类:
public class ServiceMonitorHub : Hub
{
}
You'll also need to add an Owin startup class to start the SignalR hub: 您还需要添加一个Owin启动类来启动SignalR集线器:
[assembly: OwinStartup(typeof(YourNamespace.SignalRStartup))]
namespace YourNamespace
{
public class SignalRStartup
{
public void Configuration(IAppBuilder app)
{
app.MapSignalR();
}
}
}
Your service handlers can then get a reference to this hub and send messages to all the clients that are connected to it: 然后,您的服务处理程序可以获取对此中心的引用,并将消息发送到与其连接的所有客户端:
public class Service1 : IService1
{
public string GetData(int value)
{
// send msg to clients
var hub = GlobalHost.ConnectionManager.GetHubContext<ServiceMonitorHub>();
hub.Clients.All.BroadcastMessage();
return string.Format("You entered: {0}", value);
}
Your WPF client then connects to this SignalR server and hooks in handlers to receive the messages send by the service handlers, this example contains a button handler that calls the service, as well as a connection to the SignalR hub to receive the messages that bounce back: 然后,您的WPF客户端连接到此SignalR服务器,并挂接处理程序以接收服务处理程序发送的消息,此示例包含一个调用该服务的按钮处理程序,以及与SignalR集线器的连接以接收反弹的消息:
public partial class MainWindow : Window
{
private HubConnection Connection;
private IHubProxy HubProxy;
public MainWindow()
{
InitializeComponent();
Task.Run(ConnectAsync);
}
private void Button_Click(object sender, RoutedEventArgs e)
{
using (var service = new ServiceReference1.Service1Client())
service.GetData(1);
}
public async Task ConnectAsync()
{
try
{
this.Connection = new HubConnection("http://localhost:59082/");
this.HubProxy = this.Connection.CreateHubProxy("ServiceMonitorHub");
HubProxy.On("BroadcastMessage", () => MessageBox.Show("Received message!"));
await this.Connection.Start();
}
catch (Exception ex)
{
}
}
}
} }
Note that clients need the NuGet SignalR.Clients package (as opposed to just SignalR). 请注意,客户端需要NuGet SignalR.Clients包(而不是仅SignalR)。
There are other ways for services to call the hub clients, this link shows a few others. 服务还有其他方式调用集线器客户端, 此链接显示了其他几种方式。
Maybe you could try ClientMessageInspector, the AfterReceiveReply of it will be called every time the client receives the message. 也许您可以尝试使用ClientMessageInspector,它的AfterReceiveReply将在每次客户端收到消息时被调用。
public class MyClientMessageInspector : IClientMessageInspector
{
Your message box
public void AfterReceiveReply(ref Message reply, object correlationState)
{
show message in your message box
}
public MyClientMessageInspector ( ){
}
public object BeforeSendRequest(ref Message request, IClientChannel channel)
{
return null;
}
}
To register the Inspector , you need to use an endpointBehavior 要注册检查器,您需要使用endpointBehavior
public class MyEndpointBehavior : IEndpointBehavior
{
public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters)
{
}
public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
{
clientRuntime.ClientMessageInspectors.Add( new MyClientMessageInspector();
}
public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
{
}
public void Validate(ServiceEndpoint endpoint)
{
}
}
And then add the behavior to your client. 然后将行为添加到您的客户端。
using (ChannelFactory<IService> ChannelFactory = new ChannelFactory<IService>("myservice"))
{
ChannelFactory.Endpoint.EndpointBehaviors.Add(new MyEndpointBehavior());
IService service = ChannelFactory.CreateChannel();
// call method
}
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.