static void Main(string[] args)
{
// new features in C# 6
// auto property initialisation
// null propagating operator
// string interpolation
// nameof operator
// runtime exception filter with when
// new dictionary initializer
// expresson bodied members
var p = new Person();
var p2 = new Person { LastName = "Mustermann2" };
Person p3 = null;
var persons = new List<Person>();
persons.Add(p);
persons.Add(p2);
persons.Add(p3);
persons = persons.Where(px => px.LastName.EndsWith("2")).ToList();
persons.Clear();
var dict = new Dictionary<int, Person>
{
[1] = p,
[2] = p2
};
foreach (var pers in persons)
{
//string firstName = null;
//if (pers != null)
// firstName = pers.FirstName;
string firstName = null;
try
{
firstName = pers.FirstName;
}
catch (NullReferenceException ex) when (firstName == null)
{
}
catch (NullReferenceException ex) when (firstName == null)
{
}
catch (Exception ex)
{
}
//string firstName = pers?.FirstName;
//Console.WriteLine(string.Format("Firstname: {0}", firstName));
Console.WriteLine($"Firstname: {pers?.FirstName}");
}
}
static void Main(string[] args)
{
// First customer
var person1 = new Person();
person1.firstName = "Vik";
person1.lastName = "Ewoods";
person1.passportPrefix = new char[2];
person1.passportPrefix[0] = 'A';
person1.passportPrefix[1] = 'D';
person1.passportSerial = 209901;
person1.customerBalance = 1789.98F;
// Second customer
var person2 = new Person();
person2.firstName = "Di";
person2.lastName = "Dila";
person2.passportPrefix = new char[2];
person2.passportPrefix[0] = 'D';
person2.passportPrefix[1] = 'C';
person2.passportSerial = 345887;
person2.customerBalance = 13099.65F;
// Third customer
var person3 = new Person();
person3.firstName = "Alisa";
person3.lastName = "Ewoods";
person3.passportPrefix = new char[2];
person3.passportPrefix[0] = 'K';
person3.passportPrefix[1] = 'A';
person3.passportSerial = 920012;
person3.customerBalance = 16901.05F;
// Creating person array - list
var personArray = new Person[3];
personArray[0] = person1;
personArray[1] = person2;
personArray[2] = person3;
// Stating count total customers balance
float totalUsersBalance = 0.00F;
int x;
for (x = 0; x <= 2; x++)
{
if (personArray[x] == null)
{
break;
}
totalUsersBalance += personArray[x].customerBalance;
}
Console.WriteLine("Total customer balance: " + totalUsersBalance);
// Hold app
Console.ReadLine();
}
public static Person[] ReadFilePersons(string fich)
{
var sr = new StreamReader(fich);
string linha1;
linha1= sr.ReadLine();
int contador;
contador = int.Parse(linha1);
Person[] persons = new Person[contador];
string linha;
int i;
try
{
for (i = 0; i < contador; i++)
{
Person p;
linha = sr.ReadLine();
var tipo = Type.GetType(linha);
//ConstructorInfo[] info_const1 = tipo.GetConstructors(BindingFlags.NonPublic | BindingFlags.Instance);
//p= info_const1[0].Invoke(new object[0]) as Person;
p= Activator.CreateInstance(tipo, true) as Person;
var infocampos = tipo.GetFields(BindingFlags.NonPublic | BindingFlags.Instance);
p.Read(sr);
if (infocampos[0].FieldType == typeof(string))
infocampos[0].SetValue(p, "xpto");
persons[i] = p;
}
}
catch (Exception erro)
{
Console.WriteLine("erro {0} na leitura", erro);
}
sr.Close();
return persons;
}
static void Main(string[] args)
{
Student S1 = new Student();
Console.WriteLine(S1.ToShortString());
S1.PersonVal = new Person("Sergey", "Polyakov", new DateTime(1995, 4, 9));
S1.StudentEducation = Education.Specialist;
S1.GroupNumberVal = 232;
S1.ExamsVal = new Exam[4];
S1.TestsVal = new System.Collections.ArrayList();
Console.WriteLine(S1.ToString());
Exam[] buf = new Exam[] { new Exam("Programming", 5, new DateTime(2015, 12, 01)), new Exam("Economics", 5, new DateTime(2015, 12, 11)),
new Exam("Math", 5, new DateTime(2015, 12, 14)), new Exam("Foreign language", 4, new DateTime(2015, 12, 20))};
S1.AddExams(buf);
Console.WriteLine(S1.ToString());
Person p1 = new Person("Name", "SName", new DateTime(1998, 1, 1));
Person p2 = new Person("Name", "SName", new DateTime(1998, 1, 1));
Console.WriteLine(p1==p2);
Console.WriteLine(p1.Equals(p2));
Console.WriteLine(p1.GetHashCode().ToString()+" "+p2.GetHashCode().ToString());
Student S2 = new Student("Ivan", "Ivanov", new DateTime(1994, 4, 5), Education.Bachelor, 432);
S2.AddExams(new Exam[] {new Exam("Math", 5, new DateTime(2015,4,30)), new Exam("Biology", 4 ,new DateTime(2015,4,25))});
S2.AddTests(new Test[] { new Test("Philosophy", true, new DateTime(2015, 4, 15)), new Test("Social", true, new DateTime(2015, 4, 10)) });
Console.WriteLine(S2.ToString());
Student S21 = (Student)S2.DeepCopy();
S2.NameVal = "Petr";
S2.SecondNameVal = "Petrov";
Console.WriteLine(S2.ToString());
Console.WriteLine(S21.ToString());
S2.GroupNumberVal = 1000;
foreach (Exam Ex in S2.ExamsVal)
{
if (Ex!=null)
Console.WriteLine(Ex.ToString());
}
foreach (Test Ts in S2.TestsVal)
{
if (Ts != null)
Console.WriteLine(Ts);
}
foreach (Exam Ex in S2.ExamsVal)
{
if ((Ex != null) && (Ex.Mark>3))
Console.WriteLine(Ex.ToString());
}
}
static void Main(string[] args)
{
Person person = new Person();
person.SetId(1);
person.FirstName = "Joe";
person.LastName = "Smith";
IFormatter formatter = new BinaryFormatter();
Stream stream = new FileStream("Person.bin", FileMode.Create, FileAccess.Write, FileShare.None);
formatter.Serialize(stream, person);
stream.Close();
stream = new FileStream("Person.bin", FileMode.Open, FileAccess.Read, FileShare.Read);
Person person2 = (Person)formatter.Deserialize(stream);
stream.Close();
Person person3 = new Person();
person3.SetId(1);
person3.FirstName = "Joe";
person3.LastName = "Smith";
XmlSerializer xmlSerializer = new XmlSerializer(typeof(Person));
StreamWriter streamWriter = new StreamWriter("Person.xml");
xmlSerializer.Serialize(streamWriter, person);
XmlSerializer xmlSerializer2 = new XmlSerializer(typeof(Person));
FileStream fs = new FileStream("Person.xml", FileMode.Open);
Person person4 = (Person)xmlSerializer2.Deserialize(fs);
Person person5 = new Person();
person5.SetId(1);
person5.FirstName = "Joe";
person5.LastName = "Smith";
Stream stream2 = new FileStream("Person.json", FileMode.Create);
DataContractJsonSerializer ser = new DataContractJsonSerializer(typeof(Person));
ser.WriteObject(stream2, person);
stream2.Close();
Stream stream3 = new FileStream("Person.json", FileMode.Open);
DataContractJsonSerializer ser2 = new DataContractJsonSerializer(typeof(Person));
person = (Person)ser2.ReadObject(stream3);
stream.Close();
}
public static void SavePersons(Person[] array, string fich)
{
int contador = 0;
foreach (Person p in array)
{
if (p != null)
{
contador++;
}
}
var save = new StreamWriter (fich);
save.WriteLine(contador);
foreach (Person p in array)
{
if (p != null)
{
save.WriteLine(p.GetType().FullName);
p.SaveFile(save);
}
}
save.Close();
}
private static object getData(Person item)
{
Thread.Sleep(1000);
return "Test Object " + item.Id;
}
static void Main(string[] args)
{
Person[] malta; // criar um instancia q identifica um array de Person
malta = new Person[10]; // identifica q malta é um array de 10
malta[0] = new Person("Zé", new DateTime(2005, 1, 1),true);
malta[1] = new Student("Manel", new DateTime(2006, 1, 1), 10);
malta[2] = new Person("Xico", new DateTime(2002, 1, 1), false);
malta[3] = new Teacher("Mário", new DateTime(2002, 1, 1), Teacher.Categoria.assistente);
foreach (Person elemento in malta)
{
if (elemento != null)
Console.WriteLine("{0} Idade: {1}", elemento, elemento.Age);
}
string fich;
Console.Write("Indique ficheiro: ");
fich = Console.ReadLine();
Person.SavePersons(malta, fich);
var malta1 = Person.ReadFilePersons(fich);
Console.WriteLine("Leu");
foreach (Person elemento in malta1)
{
Console.WriteLine(elemento);
Console.WriteLine();
}
}
static void Main2(string[] args)
{
Person p1 = new Person("Alice", new DateTime(1980,1,1),true); // p1 é uma <referência para um objecto com a estrutura da classe person
int i = p1.Id;
p1.Name = "Alice Tomás";
p1.Show(); // chama o objecto show sobre o objecto p1
Console.WriteLine("age{0} é parecido com {1}", p1.Name, p1.Age);
Console.WriteLine("número de bonecos {0}", Person.GetNumberCli());
Person p2 = new Person("Bob", new DateTime(1990,1,1)); ;
p2.Show(); // chama o objecto show sobre o objecto p2
Console.WriteLine("número de bonecos {0}", Person.GetNumberCli());
}
private static int ReadFilePersons(Person[] array, string fich)
{
int contador = 0;
var sr = new StreamReader (fich);
{
string line_nome;
while ((line_nome = sr.ReadLine()) != null)
{
string line_data = sr.ReadLine() ;
array[contador] = new Person(line_nome, DateTime.Parse(line_data));
contador ++ ; // contador = contador + 1
}
sr.Close();
}
return contador;
}
static void Main5(string[] args)
{
Person[] malta; // criar um instancia q identifica um array de Person
malta = new Person[10]; // identifica q malta é um array de 10
/*int max = 3; // máx pessoas a ler
for (int pointer = 0; pointer < max; ++pointer)
{
malta[pointer] = ObtemNome();
}*/
int max = ReadFilePersons(malta, "Pessoas.txt");
for (int pointer = 0; pointer < max; ++pointer)
{
Console.WriteLine(malta[pointer].ToString());
}
malta[3] = new Student("Zé", new DateTime(2005, 1, 1), 10);
foreach (Person elemento in malta)
{
if (elemento != null)
Console.WriteLine("{0} Idade: {1}", elemento, elemento.Age);
}
int i;
string linha1;
Console.Write("Introduza número:");
linha1 = Console.ReadLine();
i = int.Parse(linha1);
//Console.WriteLine(malta[i].ToString());
Student s = malta [i] as Student;
if (s != null)
Console.WriteLine("nr_aluno {0} ", s.nr_aluno);
else
Console.WriteLine("Não é estudante {0} ", malta [i]);
//Console.WriteLine("Fim");
}
public static Person ObtemNome() // devolve uma estrutura person
{
string _name;
DateTime _dt_nasc;
Console.Write("Introduza o Nome:");
_name=Console.ReadLine();
Console.Write("Introduza a data de nascimento:");
string linha = Console.ReadLine();
_dt_nasc=DateTime.Parse(linha);
Person p = new Person(_name, _dt_nasc);
return p;
}
public virtual object DeepCopy()
{
Person p = new Person(Name, SecondName, DateOfBorn);
return p;
}
