Can I have an optional parameter for an ASP.NET SOAP web service

Question

I want to build a webservice with this signature, which does not throw an exception if param2 is left empty. Is this possible?

[WebMethod]
public string Hell         


        

Answer 1

You can have a Overloaded Method in webservices with MessageName attribute. This is a workaround to achieve the overloading functionality.

Look at http://msdn.microsoft.com/en-us/library/byxd99hx%28VS.71%29.aspx

[WebMethod(MessageName="Add3")]
public double Add(double dValueOne, double dValueTwo, double dValueThree)
{
   return dValueOne + dValueTwo + dValueThree;
}

[WebMethod(MessageName="Add2")]
public int Add(double dValueOne, double dValueTwo)
{
   return dValueOne + dValueTwo;
}

The methods will be made visible as Add2 and Add3to the outside.