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1、vb_net简明使用手册（Vb_netconcisemanual）VB.NETconcisemanualVB.NETconcisemanualLiuVisualBasic.NET(VB.NET)isthenextgenerationofVisualBasic,VB.NETwillprovideafirst-class,object-orientedprogramminglanguage,butalsobringsmanynewfunctions,suchasinheritanceimplementati
2、on,overloadingandparameterizedconstructor.Inaddition,asthelanguagestructureisadjusted,suchasstructuredexceptionhandling,codeiseasiertomaintain,whichenablesdeveloperstowritehighlyscalablecodeusingsimple,clearfreethreads.VBwillprovideallthelanguagefeatures
3、thatdevelopersneedtoenablethemtobuildstable,scalabledistributedWebapplications.Atthesametime,astheworld'smostpopulardevelopmentsoftware,tomaintaintheeasytousefeatures.Whetheryou'reanoviceoraveteranVBprogrammer,VB.NETwillenableyoutocreatecutting-edgesoftw
4、arefortomorrow'sinternet.First,thenewcharacteristicsofVB.NET(1)newfunctionsrelatedtoobjectorientedprogramming(1)inheritance:programmersreusecodeanddatathroughinheritance.ReusingcodethathasbeentestedwillgreatlyreducethepossibilityofgeneratingprogramBug.(2
5、)overloading:byusingdifferentparametertypes,youcanletprogrammersusesubprocessesorfunctionswiththesamenameanddifferentfunctions.(3)parameterizedconstructor:whenyoucreateanewinstance,passtheparametertoit,simplifyingtheclientcode.(two)othernewfunctions(1):f
6、reethreadfreethreadprovidesasynchronousprocessingmechanism,theprogrammercanwithoutaffectingotherapplications,anewthreadforlongtimetask,complexqueriesormultiblocksynchronizationcalculation.(2)structuredexceptionhandling:using"Try"...Catch..."Finally"state
7、ment,theprogrammercaninsertexceptionprocessingdirectlyintotheprogramwithoutusing"OnError""Goto"statement.(3)detection:VB.NETgeneratescompileerrorsforanytypeconversionthatmaycauseruntimeerrors,soastoimprovethesecurityoftypeconversions.(4)sharedmembers:dat
8、aandfunctionmembersthatcanbesharedbyallinstancesofaclass.(5)initializationfunction:VB.NETsupportsdirectinitializationofvariabledefinitionrows.Atthesametime,VB.NETalsohasgarbagecollectionfunction;createserver-sidecode;Webse
