c#常用集合总结

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1、C#常用集合总结C#commoncollectionsummary-1(1)let'sbeginwiththesetdefinition!Personally,Ithinkit'sgoodtolookbackalittlebitmoreoften.Acollectionisagroupofsimilartypedobjectsthatarecombinedtogether・Sowehavetobecarefulwhenchoosingacollectionclass,sinceeachcollectionhasitsowncapabilities

2、,soeachsethasitsownlimitations.Thestrongerthespecializationoftheset,themorerestrictionsitwillhave・(2)ArrayList:theuseofsizecanbeimplementedasanarrayofadditionaldynamicneeds・ArrayListhasacollectionofboxingandunboxingoperations,ArrayListpassedbyvalue・Thecodereadsasfollows:Array

3、Listal=new(ArrayList);//parameterlessconstructor//ArrayListal=new,ArrayList(3)definestheconstructorofthelengthThe//ArrayListal=newArrayList(Newint{1,2,3})implementstheICollectioninterfaceAl.Add(1);//packingAl.Add(2);Al.Add(3);For(inti=0;I

4、;Console・WriteLine(al[i]・GetType()・Name);}Console・WriteLine(〃-〃);Foreach(objectKinAl)//unboxing,mustbedeclaredasaobjecttype・{Console・WriteLine(K);}Console.WriteLine(〃-“)；NameExplainCapacityGetsorsetsthenumberofe1ementsthatArrayListcancontain.CountGetsthenumberofe1ementsactual

5、lycontainedintheArrayList・IsFixedSizeGetsavalueindicatingwhethertheArrayListhasafixedsize・IsReadOnlyGetsavalueindicatingwhethertheArrayListisread-only.ItemGetsorsetstheelementatthespecifiedindex・AddAddobjectstotheendofArrayList・AddRangeAddtheelementsofICollectiontotheendofArr

6、ayList・BinarySearchUseabinarysearchalgorithmtolocatespecificelementsinasortedArrayListorpartofit.ClearRemoveallelementsfromArrayList.ContainsDetermineswhetheranelementisinArrayList・CopyToCopyArrayListorpartsofitintoaone-dimensionalarray.EqualsDetermineswhetherthetwoObjectinst

7、ancesareequa1.FixedSizeReturnsalistoffixedsizepackagesinwhichelementsareallowedtochange,butarenotallowedtoaddorremove・GetEnumeratorReturnstheenumeratorthatcyclestoaccessArrayList・GetRangeReturnArrayList,ThatrepresentsasubsetoftheelementsinthesourceArrayList・GetTypeGetstheType

8、ofthecurrentinstance・IndexOfAzerostartindexthatreturnsthefirstmatcho