Question

I have the following interface:

   public interface Iface
   {
      void Sample1();
      void Sample1(bool value);
   }

And the implementation is shown below. Note: It is requried that Sample1’s implementation be explicit (due to generic constraints voodoo)

   public class myCLass : Iface
   {
      void Iface.Sample1()
      {
         this.Sample1(true);
      }
      void Iface.Sample1(bool value)
      {
      }
   }

Trying to call the overload, however, results in this error:

Error 5 ‘myCLass’ does not contain a definition for ‘Sample1’ and no extension method ‘Sample1’ accepting a first argument of type ‘myCLass’ could be found (are you missing a using directive or an assembly reference?) Q:\common\VisualStudio\Charting\Drilldowns.cs 18 15 Charting

Bottom line: I think I’m unsure of the syntax I should be using to call the ‘other’ overload in the same interface.

Answer 1

Since you’re implementing the interface explicitly, you need to cast yourself to the interface:

((IDrilldown)this).Sample1(true);

Or, if you don’t like the in-line cast:

IDrilldown idd = (IDrilldown)this;
idd.Sample1(true);

If you did a normal, implicit implementation, you’d be able to call the method directly. Explicit interface implementations are only usable on a variable specifically defined as that interface.