Question

I am writing a class library(API) in C#. The class is non-static and contains several public events. Is it possible to trigger those events from a static method in a separate class?
For example…

class nonStaticDLLCLASS
{
   public event Event1;

   public CallStaticMethod()
  {
     StaticTestClass.GoStaticMethod();
  }
}

class StaticTestClass
{
   public static GoStaticMethod()
   {
     // Here I want to fire Event1 in the nonStaticDLLCLASS
     // I know the following line is not correct but can I do something like that?

     (nonStaticDLLCLASS)StaticTestClass.ObjectThatCalledMe.Event1();

   }
}

I know you typically have to create an instance of the non-static class in order to access it’s methods but in this case an instance has already been created, just not by the class that is trying to access it.

Answer 1

Instance methods can only be called on instances. In your example, the instance is calling the static method. Can you give the static method a parameter allowing the instance to pass in a reference to itself? Something like this:

class nonStaticDLLCLASS
{
   public event Event1;

   public CallStaticMethod()
  {
     StaticTestClass.GoStaticMethod(this);
  }
}

class StaticTestClass
{
   public static GoStaticMethod(nonStaticDLLCLASS instance)
   {
     // Here I want to fire Event1 in the nonStaticDLLCLASS
     // I know the following line is not correct but can I do something like that?

     instance.Event1();

   }
}

I think you need to clarify your question to specify why you can’t do something like this, or why the instance can’t raise its own event.