Question

我是WCF的初学者。我创建了一个WCF示例，如下所示，但它没有正常工作。

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);
}
}

如您所见，我正在使用PerCall和Multiple并发进行测试。

使用Call func，我设置IsOneWay = false，这样我就可以收到字符串并显示我的wcf客户端。这是结果：

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

它总是有相同的线程。这意味着在这种情况下没有多个线程？

使用Call2 func，我设置IsOneWay = true，当我在WCF服务上调试时，我看到线程编号总是不同的。这意味着存在多个线程。

我没有任何线索，也没有找到答案，但是这个。请指教。

非常感谢。

Answer 1

IsOneWay属性设置为false表示客户端正在等待来自服务的回复消息，然后再继续执行下一个语句。

尽管服务实例是多线程的（ConcurrencyMode.Multiple），但客户端的每个请求都会一个接一个地同步发生。这导致每次调用都发生在它自己的服务实例和同一个线程中。

使用IsOneWay属性的WCF问题

1 个答案: