private void Run0()
{
// 暗黙キャスト
EditBox editBox = new EditBox();
IControl control = editBox;
IDataBound dataBound = editBox;
}
private void Run1()
{
// 明示キャスト
object obj = new EditBox();
IControl control = (IControl)obj;
IDataBound dataBound = (IDataBound)obj;
}
static void Main()
{
object obj = new EditBox();
IControl control = (IControl)obj;
IDataBound dataBound = (IDataBound)obj;
System.Console.WriteLine(
"{0}: object, {1}: IControl, {2}: IDataBound", obj, control, dataBound);
IControl editBox = new EditBox();
editBox.Paint();
}
public static void Main(string[] args)
{
EditBox editBox = new EditBox();
editBox.OnlyMyFunc();
IControl control = editBox;
control.Paint();
IDataBound dataBound = editBox;
Binder binder = new Binder();
dataBound.Bind(binder);
}
public static void Examples()
{
// <CreatePoints>
var p1 = new Point(0, 0);
var p2 = new Point(10, 20);
// </CreatePoints>
// <CreatePairObject>
var pair = new Pair <int, string>(1, "two");
int i = pair.First; // TFirst int
string s = pair.Second; // TSecond string
// </CreatePairObject>
// <ImplicitCastToBase>
Point a = new Point(10, 20);
Point b = new Point3D(10, 20, 30);
// </ImplicitCastToBase>
// <UseInterfaces>
EditBox editBox = new EditBox();
IControl control = editBox;
IDataBound dataBound = editBox;
// </UseInterfaces>
// <UsingEnums>
var turnip = SomeRootVegetable.Turnip;
var spring = Seasons.Spring;
var startingOnEquinox = Seasons.Spring | Seasons.Autumn;
var theYear = Seasons.All;
// </UsingEnums>
// <DeclareNullable>
int?optionalInt = default;
optionalInt = 5;
string?optionalText = default;
optionalText = "Hello World.";
// </DeclareNullable>
// <DeclareTuples>
(double Sum, int Count)t2 = (4.5, 3);
Console.WriteLine($"Sum of {t2.Count} elements is {t2.Sum}.");
// Output:
// Sum of 3 elements is 4.5.
// </DeclareTuples>
}
public static void Main()
{
EditBox edit = new EditBox();
IDataBound bound = edit as IDataBound;
if (bound != null)
{
Console.WriteLine("IDataBound is supported...");
bound.Serialize();
}
else
{
Console.WriteLine("IDataBound is NOT supported...");
}
}
static void UsageTwo()
{
object obj = new EditBox();
IControl control = (IControl)obj;
IDataBound dataBound = (IDataBound)obj;
}
static void UsageOne()
{
EditBox editBox = new EditBox();
IControl control = editBox;
IDataBound dataBound = editBox;
}
