2

我使用此链接学习 WCF 编程

我在该链接中使用了用于客户端和服务器之间连接的示例代码。现在我想将该控制台应用程序转换为 WPF，但是当我运行客户端时出现此错误（当然我在运行客户端之前运行服务器）：

在 net.pipe://localhost/PipeReverse 上没有可以接受消息的端点侦听。这通常是由不正确的地址或 SOAP 操作引起的。

另外我应该说示例代码没有任何app.config文件。

在MainWindow.xaml客户文件中：

[CallbackBehavior( ConcurrencyMode=ConcurrencyMode.Multiple,UseSynchronizationContext=false )]
public partial class MainWindow : Window,ICallbacks
{
    public void MyCallbackFunction(string callbackValue)
    {
        Dispatcher dispatcher=Dispatcher.CurrentDispatcher;
        dispatcher.BeginInvoke( new Action(
        () => textBox1.Text = callbackValue ) );
        //     MessageBox.Show( "Callback Received: {0}",callbackValue );
    }
    IStringReverser _channel;
    [ServiceContract( SessionMode = SessionMode.Required,
    CallbackContract = typeof( ICallbacks ) )]
    public interface IStringReverser
    {
        [OperationContract]
        string ReverseString(string value);
    }


    public MainWindow()
    {
        InitializeComponent();
        MainWindow myCallbacks = this;
        var pipeFactory = new DuplexChannelFactory<IStringReverser>(
           myCallbacks,
           new NetNamedPipeBinding(),
           new EndpointAddress(
              "net.pipe://localhost/PipeReverse" ) );
        ThreadPool.QueueUserWorkItem( new WaitCallback(
            (obj) =>
            {
                _channel = pipeFactory.CreateChannel();
            } ) );
    }

    private void button1_Click(object sender,RoutedEventArgs e)
    {
      _channel.ReverseString( "Hello World" );
    }
}
public interface ICallbacks
{
    [OperationContract( IsOneWay = true )]
    void MyCallbackFunction(string callbackValue);
}

在MainWindow.xaml服务器文件中：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }


    private void button1_Click(object sender,RoutedEventArgs e)
    {
        using (ServiceHost host = new ServiceHost(
       typeof( StringReverser ),
        new Uri[]{
      new Uri("net.pipe://localhost")
        } ))
        {
            host.AddServiceEndpoint( typeof( IStringReverser ),
              new NetNamedPipeBinding(),
              "PipeReverse" );

            host.Open();

            MessageBox.Show( Properties.Resources.Service_is_available__Press__ENTER__to_exit_ );
            host.Close();
        }
    }
}

[ServiceContract(SessionMode = SessionMode.Required,
                 CallbackContract = typeof( ICallbacks ) )]
public interface IStringReverser
{
    [OperationContract]
    string ReverseString(string value);
}

public interface ICallbacks
{
    [OperationContract( IsOneWay = true )]
    void MyCallbackFunction(string callbackValue);
}

public class StringReverser : IStringReverser
{
    public string ReverseString(string value)
    {
        char[] retVal = value.ToCharArray();
        int idx = 0;
        for (int i = value.Length - 1;i >= 0;i--)
            retVal[idx++] = value[i];

        ICallbacks callbacks =
     OperationContext.Current.GetCallbackChannel<ICallbacks>();

        callbacks.MyCallbackFunction( new string( retVal ) );

        return new string( retVal );
    }
}
4

1 回答 1

2

问题就这么简单解决了，

所有的问题是我在单击服务器中的按钮后错误地关闭了连接！

于 2012-10-07T19:42:16.723 回答