C#???????: ?????к????
???????????? ???????[ 2016/6/2 11:20:30 ] ??????????????????? .NET
????1. ???
?????????????C++?е???????????????????λ?????????????C#????????????????????????????????????????????????????????????????????????????????????????????£????????????????????????????????????????????б???????е??????????λ???????Щ?????£????????????÷????????????????????????????????
????1.1 ????????
???????????????????????У??????????????2???????
???????ù????delegate???????????????????????к?????????????????????????????????????
??????????ж???????????????????????????????????ж???
??????????洴??????ж???????????а?????????á?
??????????δ????????????????е??????
????C#
//step01?????delegate????????????
public delegate int CalcSumDelegate(int a?? int b);class Program
{
static void Main(string[] args)
{
//step03????????????У??????÷???
CalcSumDelegate del = new CalcSumDelegate(CalcSum);
//step04?????????
int result = del(5?? 5);
Console.WriteLine("5+5=" + result);
}//step02????????????????????????
public static int CalcSum(int a?? int b)
{
return a + b;
}
}
???????????4?????裬???????д????????????????????????????????ILSpy??????????????????????????????£?
??????1?????????м?й?????System.MulticastDelegate —> System.Delegate —>System.Object??
??????2????????????????3????????BeginInvoke??EndInvoke??Invoke????????????????????????3???????????????????
????Invoke ???????????????????á??????????е????del(5?? 5)????????????????????? del.Invoke(5??5)??
????BeginInvoke ??????????????е??????á??????????????????????У???????????dal.BeginInvoke(5??5)??
???????BeginInvoke ?? EndInvoke ??.Net?????????????????????????????????????????÷??????????????
????1.2 ?????
?????????п??????????????????????????????нж???С??????????????????????????У?
????C#
//step01?????????????
publicdelegatevoidPrintDelegate();
publicclassProgram
{
publicstaticvoidMain(string[]args)
{
//step03?????????У???????1??????
PrintDelegatedel=Func1;
//????2??????
del+=Func2;
//????3??????
del+=Func3;
//step04?????????
del();//?????????????
//?????1??????!
//?????2??????!
//?????3??????!
}
//step02??????????ж???????3??????
publicstaticvoidFunc1()
{
Console.WriteLine("?????1??????!");
}
publicstaticvoidFunc2()
{
Console.WriteLine("?????2??????!");
}
publicstaticvoidFunc3()
{
Console.WriteLine("?????3??????!");
}
}
?????????????????е?????????????????????????????????????????????????????????????? “+=” ??????????????????
??????1??????????а???????????
???????????е??????????MulticastDelegate ????????????????ζ?System.MulticastDelegate??????
????MulticastDelegate ???????????????????б?????б????????б?????????????????????????·??????????????????б??е???г??????????????????Щ??С????????б????й????з???????????????????????MSDN??
??????2????????“+=”???????????
???????????????????????????????е????
????“+=”????????????Delegate.Combine???????÷??????????????????????????????????ж???
??????
???·???
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