??????3??????????????????з???????????
?????????????????е???????????????????????????з??????????????????з?????????????????????б?????????á????????????е????????????????????????????δ???????￡?
????C#
public delegate string GetStrDelegate();
public class Program
{
public static void Main(string[] args)
{
GetStrDelegate del = Func1;
del += Func2;
del += Func3;
string result = del();
Console.WriteLine(result);
//?????????????
//You called me from Func3
}
public static string Func1()
{
return "You called me from Func1!";
}
public static string Func2()
{
return "You called me from Func2!";
}
public static string Func3()
{
return "You called me from Func3!";
}
}
?????????????????GetInvocationList???????б??????з?????????????????У?????????з??????
????C#
public delegate string GetStrDelegate();
public class Program
{
public static void Main(string[] args)
{
GetStrDelegate del = Func1;
del += Func2;
del += Func3;
//?????????????з???
Delegate[] delList = del.GetInvocationList();
//????????????????????????
foreach (GetStrDelegate item in delList)
{
//??е?????
string result = item();
Console.WriteLine(result);
//?????????????
//You called me from Func1
//You called me from Func2
//You called me from Func3
}
Console.ReadKey();
}
public static string Func1()
{
return "You called me from Func1";
}
public static string Func2()
{
return "You called me from Func2";
}
public static string Func3()
{
return "You called me from Func3";
}
}
????1.3 ????????
??????????????C#2.0?汾???????????????????????е????????????????????????????Σ??????б??????????????????????????????????ɡ?
????C#
//step01?????????????
public delegate string ProStrDelegate(string str);
public class Program
{
public static void Main(string[] args)
{
//step02???????????????????ж???
ProStrDelegate del = delegate(string str) { return str.ToUpper(); };
string result = del("KaSlFkaDhkjHe");
Console.WriteLine(result);
Console.ReadKey();
//?????KASLFKAFHKJHE
}
}
??????1?????????????C#???????????????????????á???????????????????????????
??????2????????????????????????????
????1.??????????????????????÷??????????????
????2.???????????????????????????????????????????á?
????1.4 Lambda????
????Lambda??????C#3.0?汾???????????????????????????????????????????????????????????Lambda?????????????????????????
????C#
public delegate string ProStrDelegate(string str);
public class Program
{
public static void Main(string[] args)
{
//???????
//ProStrDelegate del = delegate(string str) { return str.ToUpper(); };
//??1
//ProStrDelegate del1 = (string str) =>{ return str.ToUpper(); };
//??2
//ProStrDelegate del2 = (str) =>{ return str.ToUpper(); };
//??3
ProStrDelegate del3 = str => str.ToUpper();
string result = del3("KaSlFkaDhkjHe");
Console.WriteLine(result);
Console.ReadKey();
//?????KASLFKAFHKJHE
}
}
??????1?????delegate????????”=>”???????????б???????????????
??????2???????????????????????????????????????б?С????()???????
??????3????????????е??????????У????????return????????????????{}??