很多时候我们用到方法的重载,在WCF中也不例外.不过需要加一点东西.我们以正常的方法来写一个方法的重载,代码如下:

[ServiceContract]
public interface ICalculatorContract
{
[OperationContract]
int add(int x, int y);

[OperationContract]
double add(double x, double y);

}

我把add方法进行了重载.

public class CalculatorService:ICalculatorContract
{
#region ICalculatorContract Members

int ICalculatorContract.add(int x, int y)
{
return x + y;
}
#endregion

#region ICalculatorContract Members


public double add(double x, double y)
{
return x + y;
}

#endregion
}



host 如下:

BasicHttpBinding binding = new BasicHttpBinding();
Uri baseUri=new Uri ("http://172.28.3.45/CalculatorService");
ServiceHost host = new ServiceHost(typeof(CalculatorService), baseUri);
host.AddServiceEndpoint(typeof(ICalculatorContract), binding,string.Empty);
ServiceMetadataBehavior behavior = host.Description.Behaviors.Find<ServiceMetadataBehavior>();
if (behavior == null)
{
behavior = new ServiceMetadataBehavior();
behavior.HttpGetEnabled = true;
behavior.HttpGetUrl = baseUri;
host.Description.Behaviors.Add(behavior);
}
host.Open(); .

这时我们运行host会出现异常:

Cannot have two operations in the same contract with the same name, methods add and add in type CalculatorContract.ICalculatorContract violate this rule. You can change the name of _disibledevent="add2")]
double add(double x, double y);

}

为openation加一个唯一的name值.这样不可以soap message区分这两个方法了.再次运行host.没有异常了.

这样客户端就可以正常使用add方法.