Call a private method using a String in VB.Net -


ok have class this.

namespace myspace   public class classa       private function methoda(prm boolean) boolean        return false      end function       private function methodb() boolean        return false      end function   end class   public class classb       private function methodc() boolean        return true      end function       private function invokea() boolean         dim methodobj methodinfo         'null pointer except below here         methodobj = type.gettype("myspace.classa").getmethod("methoda")          dim params boolean() = {false}         return cbool(methodobj.invoke(new classa(), params))       end function   end class  end namespace

what trying here invoke method different class parameters using method. returns null pointer exception. why? went wrong?

you doing various things wrong. following code should work without problem:

dim obja classa = new classa() methodobj = obja.gettype().getmethod("methoda", bindingflags.instance or bindingflags.nonpublic) dim params object() = {false} methodobj.invoke(obja, params)

you have various errors shouldn't allow code run @ all, namely:

  • you retrieving private method without adequate bindingflags.
  • you not passing arguments object type.

additionally, not using getmethod instantiated object of classa (e.g., obja above) , instance.gettype(); not 100% sure need (perhaps can accomplish intend), performing step pretty quick process , allow code above work without problem.


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