使用IsOneWay属性的WCF问题

Question

我是WCF的初学者。我创建了一个WCF示例，如下所示，但它没有正确工作。

WCF服务: ITestBiz：

[ServiceContract]
public interface ITestBiz
{
    [OperationContract(IsOneWay = false)]
    string Call(string clientName, int sleep);
[OperationContract(IsOneWay = true)]
void Call2(string clientName, int sleep);
}

TestBiz：

[ServiceBehavior(InstanceContextMode= InstanceContextMode.PerCall, ConcurrencyMode = ConcurrencyMode.Multiple)]
public class TestBiz : ITestBiz
{
    // maintain instance count 
    public int i=0;
    public string Call(string ClientName, int sleep)
    {
    // increment instance counts
    i++;
    // display client name, instance number , thread number and time when 
    // the method was called
    //Console.WriteLine("Client name :" + ClientName + "\t Instance:" +
    //  i.ToString() + "\t Thread:" + Thread.CurrentThread.ManagedThreadId.ToString() +
    //  "\t Time:" + DateTime.Now.ToString() + "\n\n");
    string str ="Client name :" + ClientName + "\t Instance:" +
      i.ToString() + "\t Thread:" + Thread.CurrentThread.ManagedThreadId.ToString() +
      "\t Time:" + DateTime.Now.ToString() + "\n\n";
    // Wait for 5 seconds
    Thread.Sleep(sleep);
    return str;
    }

public void Call2(string ClientName, int sleep)
{
    // increment instance counts
    i++;
    // display client name, instance number , thread number and time when 
    // the method was called
    Console.WriteLine("Client name :" + ClientName + "\t Instance:" +
      i.ToString() + "\t Thread:" + Thread.CurrentThread.ManagedThreadId.ToString() +
      "\t Time:" + DateTime.Now.ToString() + "\n\n");
    // Wait for 5 seconds
    Thread.Sleep(sleep);
}
}

正如您所看到的，我正在使用PerCall和多个并发进行测试。

通过调用func，我将IsOneWay = false设置为可以接收字符串并显示我的wcf客户端。其结果是：

Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:34 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:34 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:35 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:35 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:36 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:36 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:37 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:37 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:38 PM
Client name :Client 1    Instance:1  Thread:19   Time:1/19/2015 4:20:38 PM

它总是有着相同的线索。这意味着在这种情况下没有多个线程？

在WCF中，我设置了IsOneWay = true，当我在WCF上调试时，我发现线程号总是不同的。它意味着存在多个线程。

除了这个，我没有任何线索，也没有找到答案的地方。请给我建议。

非常感谢。

Answer 1

IsOneWay属性设置为false，意味着客户端在继续其下一条语句之前等待来自服务的回复消息。

尽管服务实例是多线程(ConcurrencyMode.Multiple)，但来自客户端的每个请求都将一个接一个地同步发生。这导致每个调用发生在它自己的服务实例和同一个线程中。