具有可选参数的C＃Web服务方法

Question

I want to build a WebMethod with Optional Parameters.

I knew the way to set MessageName .

[WebMethod(MessageName = "Default")]
public void SearchPerson(String finger_print_base64)
{

}

[WebMethod(MessageName = "AddThreshold")]
public void SearchPerson(String finger_print_base64,int threshold)
{

}

But I want to set two parameters with same type.

[WebMethod(MessageName = "AddThreshold")]
public void SearchPerson(String finger_print_base64,int threshold)
{

}

[WebMethod(MessageName = "AddMinMatches")]
public void SearchPerson(String finger_print_base64,int mini_matches)
{

}

And the Visual Studio told me an error.

"SearchPerson already hava an method with the same type of parameters "

Answer 1

You have tow methods with same signature , at least change the data type of one parameter or add another parameter like (boolean one) !

changing the name of parameter is not a solution.

Answer 2

At first : Overload in web-methods is not supported , IIS can't handle it.

Now The compiler can't build tow or more methods with the same name and signature under the same class , Because of , how it can address the method in the "dll" file without confuse! ,,

if you want to call your methods use Interface or abstract class and override the method from it in new three classes and call them :)

"MessageName" is just an Allies

No Overload Because of the method name became an (address, or Url , etc) so the application will route to is without caring for it's signature , programming feature or even it's Programming language.