public override void Cooking(int money)
{
var joey = new Joey();
GetSalt getSalt = joey.BuySalt;
Console.WriteLine("C#1.0的媽媽，花{1}元，透過Joey的BuySalt()，拿{0}炒菜", getSalt(money).Name, money.ToString());
}
public delegate Salt GetSalt(int money); //定義委派的簽章
public override void Cooking(int money)
{
#region 宣告變數，assign joey的BuySalt()給變數
var joey = new Joey();
GetSalt getSalt = new GetSalt(joey.BuySalt);
#endregion
Console.WriteLine("C#1.0的媽媽，花{1}元，透過Joey的BuySalt()結果，拿{0}炒菜", getSalt(money).Name, money.ToString());
//--------------------
//實際執行委派
}
public override void Cooking(int money)
{
GetSalt getSalt = x =>
{
if (x > 100)
{
return(new RockSalt());
}
else
{
return(new SeaSalt());
}
};
Console.WriteLine("C#3.0的媽媽, 花{1}元，透過lambda敘述式結果，拿{0}炒菜", getSalt(money).Name, money.ToString());
}
public override void Cooking(int money)
{
//delegate(參數){委派執行內容}
GetSalt getSalt = delegate(int moneyForSalt)
{
if (moneyForSalt > 100)
{
return(new RockSalt());
}
else
{
return(new SeaSalt());
}
};
Console.WriteLine("C#2.0的媽媽, 花{1}元，透過匿名delegate方法結果，拿{0}炒菜", getSalt(money).Name, money.ToString());
}
public override void Cooking(int money)
{
GetSalt getSalt = new GetSalt(
moneyForSalt => //1.不再透過delegate關鍵字宣告，而透過=>代表
{ //2.可以不必宣告參數型別(除非推斷不出來)
if (moneyForSalt > 100) //3.只有一個參數，可以不用加小括號()
{
return(new RockSalt());
}
else
{
return(new SeaSalt());
}
});
Console.WriteLine("C#1.0的媽媽，花{1}元，透過Joey的BuySalt()結果，拿{0}炒菜", getSalt(money).Name, money.ToString());
//--------------------
//實際執行委派
}
public delegate Salt GetSalt(int money); //定義委派的簽章
public override void Cooking(int money)
{
GetSalt getSalt = new GetSalt
(
delegate(int moneyForSalt) //直接撰寫委派方法的內容，assign給getSalt變數
{
if (moneyForSalt > 100)
{
return(new RockSalt());
}
else
{
return(new SeaSalt());
}
}
);
Console.WriteLine("C#2.0的媽媽，花{1}元，透過Joey的BuySalt()結果，拿{0}炒菜", getSalt(money).Name, money.ToString());
//--------------------
//實際執行委派
}
