Beispiel #1
0
        private void button2_Click(object sender, EventArgs e)
        {
            //solution A: this solution is used to show upcasting and downcasting
            ScaryScary fingersTheClown = new ScaryScary("big shoes", 14);
            FunnyFunny someFunnyClown = fingersTheClown;//upcasting to FunnyFunny Class
            IScaryClown  someOtherScaryClown = someFunnyClown as ScaryScary;//downcasting to IScaryClown interface

            //if (someFunnyClown is IScaryClown) //my solution 1 which is different to the book, using interface casting with "as IScaryClown"
            //{
                //IScaryClown someOtherScaryClown = someFunnyClown as IScaryClown;
                //someOtherScaryClown.Honk();
            //}

            //solution 2: just one statement is enough
            //IScaryClown someOtherScaryClown = new ScaryScary("big shoes", 14);
            someOtherScaryClown.Honk();
            //someFunnyClown.Honk();
        }
Beispiel #2
0
        private void button2_Click(object sender, EventArgs e)
        {
            //solution A: this solution is used to show upcasting and downcasting
            ScaryScary  fingersTheClown     = new ScaryScary("big shoes", 14);
            FunnyFunny  someFunnyClown      = fingersTheClown;              //upcasting to FunnyFunny Class
            IScaryClown someOtherScaryClown = someFunnyClown as ScaryScary; //downcasting to IScaryClown interface

            //if (someFunnyClown is IScaryClown) //my solution 1 which is different to the book, using interface casting with "as IScaryClown"
            //{
            //IScaryClown someOtherScaryClown = someFunnyClown as IScaryClown;
            //someOtherScaryClown.Honk();
            //}

            //solution 2: just one statement is enough
            //IScaryClown someOtherScaryClown = new ScaryScary("big shoes", 14);
            someOtherScaryClown.Honk();
            //someFunnyClown.Honk();
        }