Question

I am using a class with a string property on it. I am looking for some sort of event notification when somebody reads the value of this property, so that I can provide the property dynamically. For example, usually somebody would do:

string foo = someClass.Property;

And it returns whatever string value is currently assigned to Property.

However, I want to say something like:

someClass.PropertyRead += new EventHandler<PropertyReadEventArgs>("Property", Property_Read);

private void Property_Read(object sender, PropertyReadEventArgs e)
{
    e.Value = "some dynamically generated string here.";
}

Any idea if something like this is possible?

Answer 1

Why not use plain property getter?

public string Property {
    get { return Generate(); }
}

If you’d rather inject the strategy you can do:

public Func<string> PropertyGetter{ get; set; }

public string Property{ 
   get{
       return PropertyGetter();
      }
}

And then

myclass.PropertyGetter = Console.ReadLine;