在多个Web服务引用中动态使用相同的方法？

Question

In c# .Net Framework 4.5 (Visual Studio Ultimate 2012, Version 11.0.61219.00 Update 5), I'm trying to define a service variable at runtime for which webservice to use. Each webservice (there are many) are all defined the same except for the endpoint url but the credentials will not cross over to authenticate. The below condition is menial to simplify the issue at hand. The following code gives the error: Cannot implicitly convert type WebService2.Service to WebService1.Service .

What I've tried: calling functions to return the proper service but the parameters or assignment all require a specific type.

var service = new WebService1.Service();
service = new WebService2.Service();

I want to be able to use the variable service in the rest of the program without having to duplicate code everywhere for using the many web service references.

Answer 1

It seems like what you are looking to do, you would need a common interface between the two services so you could inject whichever service you wish to use.

public class WebService1 : IWebService {...service code} 
public class WebService2 : IWebService{...service code}
public interface IWebService{...service methods you will be calling}

Then you could do the following.

IWebService service = new WebService1.Service();
service = new WebService2.Service();

Answer 2

Assuming that the different services share the same method names, you can create an interface that all of the services implement by using the interface

IMyService.cs

interface IMyService
{
     void MyMethod(string filter);
}

MyWebServiceImplementation.cs

public class MyWebServiceImplementation : IMyService
{
    public void MyMethod(string filter);
}

MySecondWebServiceImplementation.cs

public class MySecondWebServiceImplementation : IMyService
{
    public void MyMethod(string filter);
}

MyImplemetationCode.cs

//Use different services from same variable

IMyService service = new MyWebServiceImplementation();
service.MyMethod("filter");
service = new MySecondWebServiceImplementation();
service.MyMethod("another filter");