将.asmx转换为WCF

Question

I'm developing a .NET 3.5 webservice using .asmx pages, but the fact that i cant use optional parameters in the GET and POST requests is making me think in switch my application to WCF. But I didnt understand clearly how it works.

Can you show me how the below code would be if converted to WCF?

[WebService]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ToolboxItem(false)]
[ScriptService]
public class ws :WebService
{
    #region WebMethods

    //Parameters shoud be optional but it isnt possible in .asmx .NET 3.5
    [WebMethod]
    public XmlNode GetResult(string param1(=null), string param2(= null))
    {
        MyClass myClass = new MyClass();

        //Get a xml string
        string output = myClass.GetXmlString(param1, param2);

        //Load this xml
        XmlDocument xmlDocument = new XmlDocument();
        xmlDocument.LoadXml(output);

        //Return this xml
        return xmlDocument.DocumentElement;
    }

    #endregion
}

Answer 1

WSDL无法描述可选参数，因此如果您使用ASMX或WCF合同无关紧要，使用可选参数的实际语义是多余的（它们仍被归类为必需参数 - 即所有参数）。