private void DecoratingActionWithEvent()
{
Console.WriteLine("Decorating Action with event attribute");
Pub1 pub = new Pub1();
pub.OnChange += () => Console.WriteLine("Called from method 1");
pub.OnChange += () => Console.WriteLine("Called from method 2");
//p.OnChange();
Console.WriteLine("On Change cannot be called from the subscriber");
pub.Raise();
Console.WriteLine("Changes happened with using event syntax:");
Console.WriteLine("1:We are no longer using a public property but a public field which due to event syntax is protected by compiler from unwanted access");
Console.WriteLine("2:Event cannot be assigned to = operator instead of +=");
Console.WriteLine("3:No outside uers can raise the event");
}
private void DecoratingActionWithEvent()
{
Console.WriteLine("Decorating Action with event attribute");
Pub1 pub = new Pub1();
pub.OnChange += () => Console.WriteLine("Called from method 1");
pub.OnChange += () => Console.WriteLine("Called from method 2");
//p.OnChange();
Console.WriteLine("On Change cannot be called from the subscriber");
pub.Raise();
Console.WriteLine("Changes happened with using event syntax:");
Console.WriteLine("1:We are no longer using a public property but a public field which due to event syntax is protected by compiler from unwanted access");
Console.WriteLine("2:Event cannot be assigned to = operator instead of +=");
Console.WriteLine("3:No outside uers can raise the event");
}
static void Main(string[] args)
{
testa te = new testa();
te.faccio(3);
#region opertori
PippoTest pippoTest = new PippoTest(1);
PippoTest pippoTest1 = new PippoTest(2);
PippoTest pippoTest2 = new PippoTest(2);
//implicit
int testt = pippoTest2;
//explicit
PippoTest testtt = (PippoTest)3;
//somma tra pippotest
var rrrr = pippoTest1 + pippoTest;
var ssss = pippoTest2++;
//somma tra int e pippotest
var ressss = 3 + testtt;
#endregion
#region TraceSource
/*
* LISTNER
*
* ConsoleTraceListener Standard output or error stream
* DelimitedListTraceListener TextWriter
* EventLogTraceListener EventLog
* EventSchemaTraceListener XML-encoded, schema-compliant log file
* TextWriterTraceListener TextWriter
* XmlWriterTraceListener XML-encoded data to a TextWriter or stream.
*/
//configuro da codice
Stream outfile = File.Create("log.txt");
//creo listner
TextWriterTraceListener textWriterTraceListener = new TextWriterTraceListener(outfile);
TraceSource traceSource = new TraceSource("myT", SourceLevels.All);
//cancello quello di default
traceSource.Listeners.Clear();
//aggiungo mio
traceSource.Listeners.Add(textWriterTraceListener);
traceSource.TraceInformation("");
traceSource.TraceEvent(TraceEventType.Critical, 0, "");
traceSource.TraceData(TraceEventType.Information, 1, "");
traceSource.Flush();
traceSource.Close();
//TraceSource configuro da appsetting
mySource.TraceEvent(TraceEventType.Error, 1,
"Error message.");
mySource.TraceEvent(TraceEventType.Warning, 2,
"Warning message.");
#endregion
#region BooleanSwitch
var sw = new System.Diagnostics.BooleanSwitch("QueryLogger", "QueryLogger");
if (sw.Enabled)
{
Console.WriteLine("Booleanswitchenabled");
}
#endregion
#region TraceSwitch
/*
* SourceSwitch e TraceSwitch sono altri due tipi di switch che servono a controllare
* la verbosità del trace e la “sorgente” del trace.
* Ovvero, se usi il tracing in maniera seria puoi, grazie al SourceSwitch,
* definire varie sorgenti di tracing e regolarle a tua discrezione con il TraceSwitch.
*/
////Define this in the web config
TraceSwitch generalSwitch = new TraceSwitch("General",
"Entire Application");
string msgText = "1";
// Write INFO type message, if switch is set to Verbose, type 4
Trace.WriteIf(generalSwitch.TraceVerbose, msgText);
msgText = "A2MC";
// Write INFO type message, if switch is set to Verbose or Warning 4 0r 2
Trace.WriteIf(generalSwitch.TraceWarning, msgText);
// Write ERROR type message, if switch is set to Verbose, Warning, info or Error
// 0 (off), 1 (error), 2 (warning), 3 (info), OR 4 (verbose)
//If General switch in WEB CONFIG = 0 then it will not get into the if below
if (generalSwitch.TraceError)
{
//Trace type, inthis case error will define how it will appear in the event log
Trace.TraceError("Error");
//Use your imagination to switch it on and off properly.
//You can really imagine and apply.
}
#endregion
#region EventLog
if (!EventLog.SourceExists("Mysource"))
{
EventLog.CreateEventSource("MySource", "MyLog");
}
EventLog eventLog = new EventLog();
eventLog.Source = "MySource";
eventLog.WriteEntry("Ciao J0n");
#endregion
#region PerformanceCounter
/* CounterCreationDataCollection
* CounterCreationData (PerformanceCounterType)
* PerformanceCounterCategory (si prende il collection che si prende il data) (PerformanceCounterCategoryType)
* PerformanceCounter
*/
var performanceCounterCategories = PerformanceCounterCategory.GetCategories();
var first = performanceCounterCategories.FirstOrDefault(category => category.CategoryName == "Processor");
var performanceCounters = first.GetCounters("_Total");
Console.WriteLine("Displaying performance counters for Processor category:--\n");
foreach (PerformanceCounter performanceCounter in performanceCounters)
{
Console.WriteLine(performanceCounter.CounterName);
}
//v2custom
String customCategoryName = "Custom Performance Counter Category";
string counterNameCustom = "pippo";
if (!PerformanceCounterCategory.Exists(customCategoryName))
{
CounterCreationDataCollection counterCreationDataCollection = new CounterCreationDataCollection();
counterCreationDataCollection.Add(new CounterCreationData(counterNameCustom, "Sample Counter 1", PerformanceCounterType.ElapsedTime));
//counterCreationDataCollection.Add(new CounterCreationData("Counter 2", "Sample Counter 2", PerformanceCounterType.SampleCounter));
PerformanceCounterCategory.Create(customCategoryName, "This is just an example", PerformanceCounterCategoryType.SingleInstance, counterCreationDataCollection);
var counter = new PerformanceCounter(customCategoryName, counterNameCustom, false);
counter.Increment();
}
using (var counter = new PerformanceCounter(customCategoryName, counterNameCustom, false))
{
counter.Increment();
}
//v2custom
string counterName = "countername";
string categoryName = "categoryname";
if (!PerformanceCounterCategory.Exists("categoryname"))
{
CounterCreationDataCollection datacollection = new CounterCreationDataCollection();
CounterCreationData numberOfItems = new CounterCreationData();
numberOfItems.CounterType = PerformanceCounterType.NumberOfItems32;
numberOfItems.CounterName = counterName;
datacollection.Add(numberOfItems);
// Create the category.
PerformanceCounterCategory.Create(categoryName,
"Demonstrates usage of the AverageTimer32 performance counter type",
PerformanceCounterCategoryType.SingleInstance, datacollection);
var counter = new PerformanceCounter(categoryName, counterName, false);
counter.RawValue = 0;
counter.Increment();
}
using (var counter = new PerformanceCounter(categoryName, counterName, false))
{
counter.Increment();
}
#endregion
#region OOP
MyMethodCond();
string main = "Main";
Trace.Write("trace");
Debug.Write("debug");
Debug.Assert(main == "Main");
Ciccio c = new Ciccio();
c.Prova();
ICiccio s = (ICiccio)c;
s.Prova();
ICiccio1 s1 = (ICiccio1)c;
s1.Prova();
c.Nano();
double xxx = 0.0;
double yyy = 0.0;
//var reszzzz = xxx / yyy;NAN
IIbabbo babbo11 = new Figliolo();
babbo11.MioMetodo();
Mio("ciao");
Mio("ciao", paperino: 1);
Mio("ciao", pluto: true, paperino: 1);
//Mio("ciao",pluto:false,1);ERRORE
//Pippo pippos = new Pippo();
//pippos.DoSOmething();
#endregion
#region GENERZIONE DINAMICA CODICE
/*
*
* //System.Reflection.Emit
* //creazione , lancio e salvataggoi IL a runtime
* AssemblyName nameAss = new AssemblyName("DynamicAss");
* AssemblyBuilder assemblyBuilder =
* AppDomain.CurrentDomain.DefineDynamicAssembly(nameAss, AssemblyBuilderAccess.RunAndSave);
* ModuleBuilder moduleBuilder = assemblyBuilder.DefineDynamicModule("DynamicMod", "DynamicAss.dll");
* //classe
* TypeBuilder tb = moduleBuilder.DefineType("HelloClass", TypeAttributes.Class | TypeAttributes.Public);
* //metodo
* MethodBuilder mb =
* tb.DefineMethod("PrintHello", MethodAttributes.Public, null, new Type[] { typeof(string) });
* ILGenerator myGenerator = mb.GetILGenerator();
* myGenerator.Emit(OpCodes.Ldstr, "Hello");
* myGenerator.Emit(OpCodes.Ldarg_1);
* MethodInfo concatMetod = typeof(String).GetMethod("Concat", new Type[] { typeof(string), typeof(string) });
* myGenerator.Emit(OpCodes.Call, concatMetod);
* MethodInfo wrMethodInfo = typeof(Console).GetMethod("Write", new Type[] { typeof(string) });
* myGenerator.Emit(OpCodes.Call, wrMethodInfo);
* myGenerator.Emit(OpCodes.Ret);
*
* //istanzio ogetto
* Type helloType = tb.CreateType();
* object helloobj = Activator.CreateInstance(helloType);
* MethodInfo hellMethodInfo = helloType.GetMethod("PrintHello", new[] { typeof(string) });
*
* //invoco metodo passando parametro
* hellMethodInfo.Invoke(helloobj, new object[] { "J0n" });
*
* //salvo dll
* assemblyBuilder.Save("DynamicAss.dll");
#endregion
*
* HelloClass helloClass = new HelloClass();
* helloClass.PrintHello("ciao");
*/
//System.CodeDom
//creare salvare e compilare codice sorgente e runtime
CodeCompileUnit codeCompileUnit = new CodeCompileUnit();
CodeNamespace codeNamespace = new CodeNamespace("CodeDOM");
codeNamespace.Imports.Add(new CodeNamespaceImport("System"));
//classe
CodeTypeDeclaration myclass = new CodeTypeDeclaration("Pippo");
//metodo
CodeMemberMethod codeMemberMethod = new CodeMemberMethod();
codeMemberMethod.Name = "DoSOmething";
codeMemberMethod.Attributes = MemberAttributes.Public;
CodeMethodInvokeExpression codeMethodInvokeExpression = new CodeMethodInvokeExpression(
new CodeTypeReferenceExpression("Console"), "WriteLine", new CodePrimitiveExpression("Ciao Ciccio"));
CodeMethodInvokeExpression codeMethodInvokeExpression1 = new CodeMethodInvokeExpression(
new CodeTypeReferenceExpression("Console"), "ReadLine");
codeCompileUnit.Namespaces.Add(codeNamespace);
codeNamespace.Types.Add(myclass);
myclass.Members.Add(codeMemberMethod);
codeMemberMethod.Statements.Add(codeMethodInvokeExpression);
codeMemberMethod.Statements.Add(codeMethodInvokeExpression1);
//salva codice sorgente
CSharpCodeProvider provider = new CSharpCodeProvider();
string pathSource = @"../../bin/Debug/Pippo.cs";
string pathOut = @"../../bin/Debug/Pippos.dll";
//string pathSource = @"../../autogenerated/Pippo.cs";
//string pathOut = @"../../autogenerated/Pippos.exe";
using (StreamWriter stream = new StreamWriter(pathSource, false))
{
IndentedTextWriter tw = new IndentedTextWriter(stream, " ");
provider.GenerateCodeFromCompileUnit(codeCompileUnit, tw, new CodeGeneratorOptions());
tw.Close();
}
CompileCSharpCode(pathSource, pathOut);
#endregion
#region reflection
//REFLECTION System.Assembly
//assembly (IL codice compilato) exe/dll
//carico in memoria assembly
//PLUGIN
//caricamento dinamico assembly da path
Assembly assm = Assembly.LoadFrom(@"C:\Users\rob\source\repos\Exam\Plugin1\bin\Debug\Plugin1.dll");
Type[] tips = assm.GetTypes();
foreach (var item in tips)
{
//var objectType = Type.GetType(objectToInstantiate);
Type objectType = assm.GetType(item.FullName);
var instantiatedObject = Activator.CreateInstance(objectType);
}
//carica solo metadati dei tipi SENZA instanziare i tipi
Assembly ass2 = Assembly.ReflectionOnlyLoadFrom("ClassLibrary1.dll");
//var instantiatedObject1 = Activator.CreateInstance(typeof(Tipo));
//var instantiatedObject2 = Activator.CreateInstance<Tipo>;
string sss = new String(new char[3]);
//assembly attualmente in esecuzione
Assembly ass = Assembly.GetExecutingAssembly();
Assembly ass1 = Assembly.GetAssembly(typeof(string));
Assembly ass12 = Assembly.GetAssembly(sss.GetType());
var mytype = ass.GetType("ConsoleApp1.Program");
var fullname = ass.FullName;
var nome = mytype.Name;
var mytypeNamespace = mytype.Namespace;
var typeinfo = typeof(MiaclasseProva).GetTypeInfo();
var name = typeinfo.FullName;
//ottengo tipo classe
MiaclasseProva miaclasseProva = new MiaclasseProva();
var typeinfo1 = miaclasseProva.GetType().GetTypeInfo();
//ottengo interafccia
var interfaccie = typeinfo1.GetInterfaces();
//ottengo metodi e parametri
MethodInfo[] metodi = typeinfo1.GetMethods(BindingFlags.Instance);
foreach (var metodo in metodi)
{
var pi = metodo.GetParameters();
foreach (var parinfo in pi)
{
Console.WriteLine($" parametro : {parinfo.ParameterType.Name}");
}
}
//ottengo membri
MemberInfo[] membri = typeinfo1.GetMembers(BindingFlags.Public | BindingFlags.NonPublic);
foreach (var mambro in membri)
{
var mi = mambro.MemberType;
}
#endregion
#region IComparable
//confrontare oggetti
ComparableMoto comparableMoto = new ComparableMoto();
comparableMoto.Targa = "pippo";
ComparableMoto comparableMoto1 = new ComparableMoto();
comparableMoto1.Targa = "pluto";
int ord = comparableMoto.CompareTo(comparableMoto1);
List <ComparableMoto> comparableMotos = new List <ComparableMoto>();
comparableMotos.Add(new ComparableMoto()
{
Targa = "A"
});
comparableMotos.Add(new ComparableMoto()
{
Targa = "B"
});
comparableMotos.Add(new ComparableMoto()
{
Targa = "C"
});
comparableMotos.Sort();
//AppDomain.CurrentDomain.UnhandledException += OnUnhandleException;
//ManageException manage = new ManageException();
//manage.GeneroEccezioneNonGestita();
#endregion
#region ref out static class
Figlio figlio1 = new Figlio();
Figlio figlio = new Figlio("as");
Macchina macchina = new Macchina("320", "bmw");
macchina.Parti();
SmartPhone.Battery battery = new SmartPhone.Battery();
ConstructorStaticClass constructorStaticClass = new ConstructorStaticClass();
ConstructorStaticClass miaclasse2 = new ConstructorStaticClass();
Console.WriteLine(ConstructorStaticClass.contatore);
ClassTest1 babbo = new ClassTest1();
var testref = 0;
double resp2;
double resp3;
//ref
babbo.cambiaNumero(ref testref);
//out scarta valore resp3
babbo.potenza(2, out resp2, out _);
var media = babbo.CalcolaMedia(18, 27, 27, 27);
babbo.ParametriNome(nome: "rob", anni: 43);
//c#7
//double xresp2;
//double xresp3;
//babbo.potenza1(2, xresp2, xresp3);
int x1 = 0;
//block
if (x1 == 0)//expression
{
//codice
}
int? nullable = null;
var cliente = new { nome = "rob" };
Mesi giorno = Mesi.febbraio;
int mese = (int)Mesi.febbraio;
Mesi mese1 = (Mesi)1;
Pippolo pippo;
pippo.a = 1;
#endregion
#region cast box unbox
//cast
int i = 123;
object box = i;
int n = (int)box;//unbox
dynamic dd = 1;
int inc = dd + 1;
var ssss1 = Convert.ToString(1);
dynamic dy = new ExpandoObject();
#endregion
#region type
//OTTENGO IL TIPO
//GetType
var ti = typeof(string).GetTypeInfo();
Type ts = Type.GetType("System.String");//se si trova in Mscorelib.dll
TestClass tc = new TestClass();
Type tipo = tc.GetType();
//typeof
Type type = typeof(Type);
//CONTROLLO IL TIPO
//is tipo | as tipo
string obj = "";
if (obj is string)
{
//cast ()
string a = (string)obj; //se obj non è compatibile con string cast exception
string a1 = obj as string; //se obj non compatobole con string ritorna null
}
#endregion
#region array
Console.WriteLine($"metodo {nameof(Main)}");
/*
* stack => vet
* heap 1
* heap 2
* heap 3
*
* ARRAY MULTID:
* -array rettangoli
* 1234
* 1234
*
* -array jagged (irregolare)
* 123456
* 234
* 2343434343
*/
//array
int[] vet = new[] { 1, 2, 3 };
//array regolari matrici
int[,] matrix = new int[3, 4];
matrix[0, 0] = 1;
int[,] matrix1 =
{
{ 1, 2, 3, 4 },
{ 5, 6, 7, 8 }
};
//jagged array irregolari
int[][] jagged = new int[3][];
jagged[0] = new int[2] {
1, 2
};
jagged[1] = new int[4] {
1, 2, 3, 4
};
#endregion
#region c7 PATTERN MATCHING
/*
* type => espr is tipo v
* const => espr is constante
* var
*
* */
//type
object obj1 = "";
if (obj1 is string str)
{
Console.WriteLine(str);
}
//invece che
if (obj1 is string)
{
string str1 = (string)obj;
Console.WriteLine(str1);
}
//const
Mesi giornomese = Mesi.febbraio;
bool feb = giornomese is Mesi.febbraio;//true se giorno di febbraio
#endregion
#region Event
//Event
Pub pub = new Pub();
//mi iscrivo e gli dico di fare questo quando viene sollevato evento evento
pub.OnChange += () => Console.WriteLine("lambda");
pub.OnChange += delegate { Console.WriteLine("delegate"); };
//sollevo evento
pub.Raise();
Pub1 p1 = new Pub1();
p1.OnChange += () => Console.WriteLine("lambda");
p1.Raise();
Pub2 p2 = new Pub2();
p2.CreateAndRaise();
Car car = new Car();
CarMonitor cm = new CarMonitor(car);
car.Decelerate();
#endregion
#region Expression Tree
//Expression Tree
Expression <Func <int, bool> > exp1 = x => x % 2 == 0;
Func <int, bool> isPari = exp1.Compile();//dopo che l'ho compliat posso eseguirla, prima era solo un albero di espressopmo
if (isPari(4))
{
Console.WriteLine("pari");
}
#endregion
#region delegate
//assegno lambda (anonyous method)
myDelegate myd = (x) => 1;
Console.WriteLine(myd("0ciao"));
//assegno metodo
myDelegate myd1 = MethodForDel;
Console.WriteLine(myd1("1ciao"));
//assegno delegate
myDelegate myd2 = delegate { return(1); };
Console.WriteLine(myd2("2ciao"));
#endregion
#region VARIANZA
//COVARIANZA OUT
//ti faccio assegnare sia metodo che ritorna stringa
//ma anche metodo che torna object perchè stringa deriva
//da object (è piu specifica)
Del d1 = new Del();
Cov <string> cov = d1.Cov1;
Cov <object> cov1 = d1.Cov2;
Cov <object> cov3 = d1.Cov2;
//Cov<string> cov2 = d1.Cov2;//no object non deriva da stringa
//CONTROVARIANZA IN
//ti faccio assegnare sia metodo che prende ingresso
//classe piu generica object ma ache classe piu specifica string
Con <object> con = d1.Con1;
Con <string> con3 = d1.Con1;
Con <string> con1 = d1.Con2;
//Con<object> con2 = d1.Con2;//no
var res3 = d1.MyCon(Convert.ToInt32, "5");
var res4 = d1.MyCon1(Convert.ToInt32, "5");
var res5 = d1.MyConGen(Convert.ToInt32, "5");
var res6 = d1.MyConGen(Convert.ToBoolean, 0);
var res7 = d1.MyConGen(Convert.ToString, 5);
Console.WriteLine(res3);
Console.WriteLine(res4);
d1.UseMulticast();
#endregion
#region generics
Task tx1 = Task.Run(() =>
{
Console.WriteLine("ciao");
});
Task[] tasksarr = new Task[1];
tasksarr[0] = tx1;
Gen1 gen1 = new Gen1();
if (gen1.GetDefault <ConstructorStaticClass, Task>(tx1) != null)
{
gen1.ContinueTaskOrDefault(tx1, Console.WriteLine);
Console.WriteLine("start task generic");
}
var mytaskList = gen1.ContinueTasksOrDefault(tasksarr, Console.WriteLine);
if (mytaskList != null)
{
Console.WriteLine("starts tasks generic");
}
Gen2 <Constructor> gen2 = new Gen2 <Constructor>();
Gen2Figlia <Constructor> gen2figlia = new Gen2Figlia <Constructor>();
Gen1Figlia <Constructor, Task> tesFiglia = new Gen1Figlia <Constructor, Task>();
//variabile statico è diverso per tipo
TestStaticGen <string> .Status = "rob";
TestStaticGen <int> .Status = 1;
Console.WriteLine(TestStaticGen <string> .Status);
Console.WriteLine(TestStaticGen <int> .Status);
TestStatic.Status = "ciao";
TestStatic.Status = "ciau";
Console.WriteLine(TestStatic.Status);
//
Generica <string, int, DateTime, bool> gen = new Generica <string, int, DateTime, bool>();
List <Lista <string> > genericiInnestati = new List <Lista <string> >();
genericiInnestati.Add(new Lista <string>(5));
genericiInnestati[0][0] = "ciao";
genericiInnestati[0][1] = "come ";
genericiInnestati[0][2] = "stai";
genericiInnestati[0][3] = "rob";
genericiInnestati[0][4] = "?";
foreach (var item in genericiInnestati)
{
for (int j = 0; j < 5; j++)
{
Console.WriteLine(item[j]);
}
}
Lista <string> lista = new Lista <string>(5);
lista[0] = "";
#endregion
#region programmazione parallela
//PLINQ solo linq to onject NO linq to sql
//prende base dati la divide in segmenti e fa query in parallelo su questi segmentie pio unisce iriaultati
// se i lavori nonn sono complessi e la base dati è minima la programmazione parallela non da buoni risultati
var qy = from num in Enumerable.Range(1, 8).AsParallel()
select Math.Pow(2, num);
//stampa da 1 a 9 (9 numeri NON in ordine)
//iterazioni indipendenti l'una dall altra quindi per tutti e due ordine non è sequnziale
Parallel.For(1, 10, g => Console.WriteLine("g-{0}", g));
var result = Parallel.For(0, 50, (g, parallelLoopState) =>
{
if (g > 5)
{
parallelLoopState.Break();
}
});
if (!result.IsCompleted)
{
var o = result.LowestBreakIteration;
}
//non è sequnziale
List <string> list = new List <string>()
{
"ciao", "come", "va?"
};
Parallel.ForEach(list, word => Console.WriteLine("{0}", word, word.Length));
#endregion
#region async await
var res1 = DoCurlAsync();
//net 4.5
//await salva lo stato del contesto del caller e quando il metodo await si conclude
//il contesto ritorna allo stato del chimante che puo eseguire il codice successivo
//questo nel caso di ui permette di modiicare la ui che proprieta nella app gui del thread
//della ui e viene eseguito nel ui syncronization context (dispatchercontext nella ui)
//DAL C#7 TUTTO PUO ESSERE AWAITABLE ED ESEGUITO AINCRONO E NON SOLO ISTANZA DI TASK
//QUALSIAIS OGGETTO CHE ESPONE METODO GETAWAITER INFATTI LA CLASSE TASK ESPONE METODO GETAWAITER
//await non puo essere usato su unsafe, lock, main
MetodoAsyn();
Console.WriteLine("codice prima fine await)");
Task <string> res = GetAsync();
List <string> files = new List <string>()
{
"pippo.txt", "pippo1.txt"
};
files.ForEach(async file => await ReadFileAsync(file));
//all block
//.Wait()
//.Result
//.GetAwaiter()
//.GetResult()
#endregion
#region task tpl
//manca continuewhenall
//continuewheany
//task figli innestati
//Task.WaitAll blocks the current thread until everything has completed.
//Task.WhenAll returns a task which represents the action of waiting until everything has completed.
//That means that from an async method, you can use:
// A DIFFERENZA DI WAIT ALL TORNA SOLO LA PRIMA ECCEZIONE NON AGGREGATE
Task[] tasksArray = new Task[3];
tasksArray[0] = Task.Run(() => { Thread.Sleep(4000); });
tasksArray[1] = Task.Run(() => { Thread.Sleep(4000); });
tasksArray[2] = Task.Run(() => { Thread.Sleep(4000); });
var ry = MyAsyncWhenAll(tasksArray);
Console.WriteLine("tornato da MyAsyncWhenAll");
Task tx = Task.Run(() =>
{
Thread.Sleep(1000);
});
Task ty = Task.Run(() =>
{
Thread.Sleep(1000);
});
Task taskall = Task.WhenAll((new Task[] { tx, ty }));
//Task taskall = Task.WhenAny((new Task[] { t1, t2 }));
taskall.Wait();
Task <String> webtask = Task.Run(() =>
{
string url = "http://www.google.it";
WebClient wc = new WebClient();
return(wc.DownloadString(url));
});
Task <String> headhtml = webtask.ContinueWith <string>(x =>
{
var res2 = x.Result;
//fai qualcosa con res
return(res2);
});
var tokenSource = new CancellationTokenSource();
CancellationToken token = tokenSource.Token;
Task cancellabletask = null;
try
{
cancellabletask = Task.Run(() =>
{
token.ThrowIfCancellationRequested();
for (int d = 0; d < 2; d++)
{
Thread.Sleep(100);
if (token.IsCancellationRequested)
{
//eseguo altre cose
token.ThrowIfCancellationRequested();
}
}
}, token);
tokenSource.CancelAfter(1000);
cancellabletask.Wait();
}
catch (AggregateException aggregateException)
{
if (aggregateException.InnerException is OperationCanceledException)
{
Console.WriteLine("OperationCanceledException£");
}
if (cancellabletask != null && (cancellabletask.IsCanceled && cancellabletask.Status == TaskStatus.Canceled))
{
Console.WriteLine(aggregateException.ToString());
}
}
Task <String> task = Task.Run(() =>
{
string url = "http://www.google.it";
WebClient wc = new WebClient();
return(wc.DownloadString(url));
});
var htmlUrl = task.Result;//blocco
List <Task> tasks = new List <Task>();
for (int r = 0; r < 5; r++)
{
int number = r;
tasks.Add(
Task.Run(() =>
{
Console.WriteLine(number);
Thread.Sleep(1000);
}));
}
//Task.WaitAll(tasks.ToArray());
Task.WaitAny(tasks.ToArray());
Console.WriteLine("all task complete");
Task longtask = Task.Run(() =>
{
Thread.Sleep(1000);
});
longtask.Wait(1000);
Task verylong = Task.Factory.StartNew(() =>
{
Thread.Sleep(2000);
}, TaskCreationOptions.LongRunning);
#endregion tpl
#region thread
for (int w = 0; w < 5; w++)
{
ThreadPool.QueueUserWorkItem(LongOperation);
}
Thread threada = new Thread(IncrMon);
Thread threadb = new Thread(IncrMon);
threada.Start();
threadb.Start();
threada.Join();
threadb.Join();
Console.WriteLine("n={0}", n2);
Thread thread1 = new Thread(Incr);
Thread thread2 = new Thread(Incr);
thread1.Start();
thread2.Start();
thread1.Join();
thread2.Join();
Console.WriteLine("n={0}", n1);
Thread t = new Thread(() =>
{
Console.WriteLine(Thread.CurrentThread.Name);
Thread.Sleep(1000);
});
Thread t1 = new Thread(() =>
{
Console.WriteLine(Thread.CurrentThread.Name);
for (int z = 0; z < 10; z++)
{
lock (lockobj)
{
n = n + 1;
Thread.Sleep(1);
Console.WriteLine("n={0}", n);
}
}
});
Thread t2 = new Thread(() =>
{
Console.WriteLine(Thread.CurrentThread.Name);
for (int x = 0; x < 10; x++)
{
lock (lockobj)
{
n = n + 1;
Thread.Sleep(1);
Console.WriteLine("n={0}", n);
}
}
});
t.IsBackground = true; //termina appena finisce la app
t.Priority = ThreadPriority.AboveNormal; //determinata quantita di cpu destinata al thread ma non è deterministico
t.Start();
t1.Start();
t2.Start();
t.Join();//il codice si blocca e attende che t finisce
#endregion
Console.ReadLine();
}