public static void ForAll(SquareDelegate squareDelegate)
{
foreach (Square square in All)
{
squareDelegate(square);
};
}
public static void ForAll(SquareDelegate squareDelegate)
{
foreach (Square square in All)
{
squareDelegate(square);
}
;
}
public static void TestTopic()
{
SquareDelegate squareDelegate = GetRectangleSidesSum;
Square baseSquare = CovarianceDelegate.BuildBaseSquare();
int rectangleSidesSum = squareDelegate(baseSquare);
Debug.WriteLine($"Contravariance: Rectangle sides sum is {rectangleSidesSum}.");
}
internal void CreateDynamicMethod()
{
MethodInfo getSquare = typeof(Square).GetMethod("CalculateSquare");
DynamicMethod calculateSquare = new DynamicMethod("CalculateSquare",
typeof(int), new Type[] { typeof(int) });
ILGenerator il = calculateSquare.GetILGenerator();
// Load the first argument, which is a integer, onto the stack.
il.Emit(OpCodes.Ldarg_0);
// Call the overload of CalculateSquare that returns the square of number
il.Emit(OpCodes.Call, getSquare);
il.Emit(OpCodes.Ret);
SquareDelegate hi =
( SquareDelegate )calculateSquare.CreateDelegate(typeof(SquareDelegate));
Console.WriteLine("\r\nUse the delegate to execute the dynamic method:");
int retval = hi(42);
Console.WriteLine("Calculate square returned " + retval);
}
static void Main(string[] args)
{
Console.Write("Number to square: ");
int.TryParse(Console.ReadLine(), out int value);
SquareDelegate square = Square;
Console.WriteLine($"Square is: {square.Invoke(value)}");
var collectionCheck = new CollectionCheck();
collectionCheck.AddItem("A");
collectionCheck.AddItem("B");
collectionCheck.AddItem("C");
collectionCheck.AddItem("D");
collectionCheck.AddItem("E");
var items = collectionCheck.Items;
items.ToList();
Console.WriteLine($"Const are static: {CollectionCheck.CONST_ARE_STATIC}");
Console.ReadLine();
}
delegate int SquareDelegate(int x); // xの平方を求める関数を持つデリゲート.
// メインメソッド
static void Main() // Mainメソッドの定義
{
// ファイルチェックデリゲートの生成.(処理内容をラムダ式で定義.)
FileCheckDelegate fcd = (filename) =>
{
// ファイルが存在するかをチェック.
if (File.Exists(filename)) // File.Existsでfilenameなるファイルが存在するかチェック.
{
// 存在する場合.
Console.WriteLine(filename + " is Exists."); // "Exists"と出力.
return(true); // trueを返す.
}
else
{
// 存在しない場合.
Console.WriteLine(filename + " is not Exists."); // "not Exists"と出力.
return(false); // falseを返す.
}
};
// "test.txt"があるかどうかチェック.
if (fcd("test.txt")) // fcdに"test.txt"を渡す.
{
// OK
Console.WriteLine("Check OK."); // "Check OK."と出力.
}
else
{
// NG
Console.WriteLine("Check NG."); // "Check NG."と出力.
}
// スクウェアデリゲートの生成.(処理内容をラムダ式で定義.)
SquareDelegate sd = x => x * x; // 単文だとこれだけでいい.
// 5の平方を求める.
Console.WriteLine("sd(5) = " + sd(5)); // 5の平方の値を出力.
}
//public delegate void PrintDelegateWithParams(string str);
//public void Print()
//{
// Console.WriteLine("Msg from print function");
//}
//public void PrintParameters(string s)
//{
// Console.WriteLine(s);
//}
static void Main(string[] args)
{
Program p = new Program();
DisplayDelegate d2 = delegate(string n1, int n2)
{
Console.WriteLine(n1);
Console.WriteLine(n2);
};
PrintDelegate d1 = delegate()
{
Console.WriteLine("Msg from anonymous function");
};
d1();
d2("I am everywhere", 10);
SquareDelegate d3 = (x => x * x);
Console.WriteLine(d3(45));
//PrintDelegate d1 = new PrintDelegate(p.Print);
//PrintDelegateWithParams d2 = new PrintDelegateWithParams(p.PrintParameters);
//d1();
//d2("Message from print parameters");
}
