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Metoden arbejder normalt med lokale variable: ........................................................................51 Parametre har attributter – implicit eller eksplicit: ....................................................................53 Rekursive funktioner/metoder: ..................................................................................................55 Rekursivt: Drev, mapper og filer ...............................................................................................57 Opgaver:.....................................................................................................................................58 Enumerationer:...............................................................................................................................58 Flags og enums: .........................................................................................................................61 Opgaver:.....................................................................................................................................62 DateTime:...................................................................................................................................62 Dato og Tids format koder:........................................................................................................64 Opgaver:.....................................................................................................................................65 XML dokumentation af programmer:...........................................................................................65 Collections: .......................................................................................................................................69 Eksempel på strenge og collections: En sorteret ordliste:..........................................................71 Hash-tabeller:.............................................................................................................................73 Opgaver:.....................................................................................................................................75 Reflection (og om hvordan man kommer videre):........................................................................76 dll_reflection.exe: ..........................................................................................................................77 reflection.exe:.................................................................................................................................79 Opgaver:.....................................................................................................................................80 Reflection i SharpDevelop:........................................................................................................81 Opgaver:.....................................................................................................................................83 Enum reflection i Windows program:........................................................................................84 Filer: ..................................................................................................................................................85 GREP – søg i filer: ...........................................................................................................................89 Bruge ’gammel’ Windows kode: ....................................................................................................91 Opgaver:.....................................................................................................................................92 Debugging eller at finde de logiske fejl:.........................................................................................92 Define sætninger kan bruges til konfiguration:..........................................................................95 Debugging med klasserne i System.Diagnostics: ......................................................................97 Metodens stack eller StackFrame: .............................................................................................98 Attributten [Conditional()]:........................................................................................................99 Løbende kontrol: Debug.Assert(): ...........................................................................................100 Debugging og tracing efter release: .........................................................................................102 Opgaver:...................................................................................................................................103 Objekt Orienteret Programmering (OOP): ................................................................................104 Indkapsling:..................................................................................................................................104 Arv: ..............................................................................................................................................105 Metoder i System.Object: ........................................................................................................105 GUID:.......................................................................................................................................105 Lille eksempel på arv: En tom klasse som arver fra Form: .....................................................106 Såkaldt ’har en’ arv (eller komposition): .....................................................................................107 Polymorfisme:..............................................................................................................................109 Genbrug:.......................................................................................................................................109 Objekter og klasser: .....................................................................................................................109 SharpDevelop og C# basis klasserne: ..........................................................................................110 Arrays og operatorer på objekter: ................................................................................................111 Opgaver:...................................................................................................................................113
Et praktisk eksempel på OOP: Person og Adresse klassen:.........................................................114 Kommentar til Adresse klassen: ..............................................................................................114 Person klassen, som ’har en’ Adresse:.....................................................................................115 Kommentar til klassen Person: ................................................................................................116 En applikation som anvender klasserne Adresse og Person: ...................................................117 Proporties i C# klasser: ................................................................................................................118 Opgaver:...................................................................................................................................120 Eksempler på Polymorfisme og Arv:...........................................................................................121 Override metoder i System.Object:..........................................................................................123 Opgaver:...................................................................................................................................124 Eksempel: Polymorfisme og dynamisk binding ......................................................................125 Opgaver:...................................................................................................................................127 Polymorfisme og Streams:.......................................................................................................127 Abstrakte klasser:.........................................................................................................................131 Arrays og operatorer på objekter (operator overloading): ...........................................................132 Opgaver:...................................................................................................................................134 Interfaces – en anden slags arv: ...................................................................................................135 Implementere standard interfaces – IComparable: ..................................................................138 Opgaver:...................................................................................................................................140 Strukturer: ....................................................................................................................................140 Brug af unsafe:.........................................................................................................................143 Strukturer modsat klasser:........................................................................................................144 Typer og hvad der kan stå i en C# fil (*.cs fil): ...........................................................................145 Namespace: ..................................................................................................................................146 Alias for et namespace eller for en klasse:...............................................................................148 User Defined namespace:.........................................................................................................149 Opgaver:...................................................................................................................................150 Exceptions i C# programmer: ......................................................................................................151 Opgaver:...................................................................................................................................156 Serialisering af objekter – gem objekter: .....................................................................................157 Opgaver:...................................................................................................................................159 .NET eller DotNet – Hvad er det egentligt?.................................................................................160 IL – Intermediate Language:....................................................................................................161 Managed/Unmanaged kode: ....................................................................................................162 COM: .......................................................................................................................................162 JIT kompiler:............................................................................................................................163 En EXE eller DLL er ikke en EXE eller DLL!........................................................................163 Eksempel: Projekt i SharpDevelop: .........................................................................................164 AssemblyInfo:..........................................................................................................................164 En klasse i Visual Basic:..........................................................................................................167 Klasse i JScript:........................................................................................................................169 En .NET applikation der bruger klasserne:..............................................................................171 XML config-filer: ....................................................................................................................173 At producere IL kode dynamisk: .............................................................................................177 Opgaver:...................................................................................................................................180 At skrive IL (Intermediate Language) kode i hånden:.............................................................181 Et konkret eksempel på IL: ......................................................................................................184 Dis-assembling, utilities:..........................................................................................................186
Page 1: Operativsystem: ...................
Page 5 and 6: 12. Du kan også skrive en bat fil
Page 7 and 8: Her følger selve listen. En del af
Page 9 and 10: Denne standard metode skal findes i
Page 11 and 12: Der kan altid anvendes mellemrum el
Page 13 and 14: fil: WinTest.cs //postcondition: Vi
Page 15 and 16: Installer SharpDevelop: Alle kode e
Page 17 and 18: Kommentarer: Som nævnt er det vigt
Page 19 and 20: Variabelnavne-regler: 1. et navn ka
Page 21 and 22: } for(int i=0;i
Page 23 and 24: En C# string er en variabel som kan
Page 25 and 26: I dette eksempel er oprettet en tab
Page 27 and 28: 171 og 174 er symboler for copyrigh
Page 29 and 30: Her oprettes en tabel med plads til
Page 32 and 33: Kommentar: {0} bruges som format-te
Page 34 and 35: Betingelsen kræver for at være op
Page 36 and 37: for: Mange programmer løber igenne
Page 38 and 39: C# format koder: I C# kan anvendes
Page 40 and 41: Du skal bruge en sammenlignende if
Page 42 and 43: eks på kommando linje parametre: f
Page 44 and 45: Et andet eksempel på foreach er da
Page 46 and 47: } } Kommentarer: Console.WriteLine(
Page 48 and 49: I modsætning hertil kan en while s
Page 50 and 51: public class app{ } public static v
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} Console.Read(); } private static
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} } Metoden opret_bruger() er defin
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} } int n=int.Parse(Console.ReadLin
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På http://csharpkursus.subnet.dk l
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} Mandag=1,Tirsdag,Onsdag,Torsdag,F
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Opgaver: 1. Enumerationer bruges om
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ny=ny.AddHours(2); Console.WriteLin
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Nu fås et magert resultat idet fil
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Bemærkninger som summary NB - i ko
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} Console.Read(); } En kørsel give
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Når programmet kører får vi denn
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værdien ”erik jensen”? beregne
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5. Skriv et ’database’ program
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} //NB en stream skal altid åbnes
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} } string klasse=null; if(args.Len
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Det ovenstående eksempel viser et
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} } //sætter formens baggrunds far
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} } reader.Close(); Console.Read();
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} } Kommentar: Console.Read();//tek
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grep ”{0:*}” linjer hvor format
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} Som det ses er linjen System.Diag
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argument 0 og sammenligne det med r
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Her følger et meget simpelt eksemp
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Hvis vi ønsker debug data vist ska
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} if(i%11==0)metode11(); if(i%12==0
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Debugging og tracing efter release:
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Objekt Orienteret Programmering (OO
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Alle objekter kan gives en unik hex
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using System; using System.Windows.
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RAM, men et objekt har en adresse i
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public class Rektangel{ } class app
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Et praktisk eksempel på OOP: Perso
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public class Person{ } //constructo
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fil:personapp.cs //en applikation s
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} } //det ses her at en property //
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public class app{ public static voi
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Alle klasser arver i C# fra System.
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} public Rektangel(string n,int s1,
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Der findes grundlæggende 3 slags S
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} //Peg paa start eller byte nr 1:
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} public static void Main(string[]
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I C# anvendes altid dette skema (sk
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IObjekter.vis(){...} Arv fra flere
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Implementere standard interfaces -
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Dette udpluk af en kørsel viser, a
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d1.tid.sekund); } } //I alt 7 bytes
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public unsafe static void Main() {
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fil: x.cs: KUN af en struct! public
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using System; using System.Windows.
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} } Hvis man erklærer klassen Y so
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Programmet er bestemt ikke ’robus
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I de fleste tilfælde kan man klare
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Vi skal også senere vende tilbage
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} } liste.Add(hus1); liste.Add(hus2
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2. Opret en telefonliste og seriali
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} } .maxstack 1 //argument 0 er 'th
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virker! (Dette er den afgørende fo
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Slet indholdet i den automatisk opr
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Skriv følgende Visual Basic kode i
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jsc er .NET’s jscript kompiler. R
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Kursus[] k=new Kursus[4]; k[0]=k1;
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XML filen dotnet.exe.config angiver
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Vi vender nu tilbage til det tidlig
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Den assembly vi producerer er egent
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Brug vores egen NyAssembly.dll //fi
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Resultatet af at kompilere en CS fi
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NB Når en klasse IKKE har en const
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dvs push strengen i den lokale vari
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Operativsystem: .............................................................

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