Question

I have a class that instantiates two classes which implement interfaces. I want one class to notify another class that something is OK. I could do it with an Action and then use private variables in the class but wondered if there was a direct way of doing it with properties so that when a property’s value changes it updates a property on another class.

For example:

public class MyClass
{
  public ILogger Logger {get;set;}
  public ILogic Logic {get;set;}

  private Form MyWinform;

  public void Setup()
  {
    MyWinform = new MyWinform();
    MyWinform.StartBatch += Logger.CreateFile; //Create file when user presses start

    //How can I set a property on ILogic to be AllOk once ILogger says so??

    //I could use an Action so that once all is ok I call IDecidedAlOK in ILogger which
    //can then assign a private bool variable inside the class

    Logic.ItsOKMethodSoSetVariableToTrue = Logger.IDecidedAllOKMethod;

  }

  public void DataIn(string Value)
  {
     Logic.DataIn(Value);
  }

  public void CreateInstances()
  {
     Logger = new FileLogger();
     Logic = new MyLogic();
  }

}

public class MyLogic : ILogic
{
   public void DataIn(string Value)
  {
     //I want to check that all is ok before I do anything

     //if (!AllOK) 
     //return;

     //Do stuff
  }
}

Answer 1

Implement INotifyPropertyChanged interface and subscribe to PropertyChanged event