private void View()
{
dataGridView1.Rows.Clear();
try{
SampleGenericDelegate <int, Document[]> del = new SampleGenericDelegate <int, Document[]>(serverClient.GetAllDocumentPerson);
IAsyncResult result = del.BeginInvoke(person.Nif, null, null);
Document[] list = del.EndInvoke(result);
if (list == null)
{
return;
}
documents = new List <Document>(list);
documents.ForEach(AddDocument);
}
catch (Exception exception)
{
var info = new InfoForm();
info.Add(exception.Message);
info.ShowDialog(this);
info.Dispose();
}
}
private void View()
{
dataGridView1.Rows.Clear();
try{
SampleGenericDelegate<int,Document[]> del = new SampleGenericDelegate<int,Document[]>(serverClient.GetAllDocumentPerson);
IAsyncResult result = del.BeginInvoke(person.Nif, null, null);
Document[] list = del.EndInvoke(result);
if (list == null)
return;
documents = new List<Document>(list);
documents.ForEach(AddDocument);
}
catch (Exception exception)
{
var info = new InfoForm();
info.Add(exception.Message);
info.ShowDialog(this);
info.Dispose();
}
}
static void Main()
{
//IComparer<Circle> areaComparer = new CircleComparer();
IComparer <IShape> areaComparer = new AreaComparer();
ComparisonHelper <IShape, Circle> areaComp = new ComparisonHelper <IShape, Circle>(areaComparer);
List <Circle> circles = new List <Circle>();
circles.Add(new Circle(2));
circles.Add(new Circle(20));
circles.Add(new Circle(12));
circles.Add(new Circle(14));
circles.Sort(areaComp);
foreach (Circle c in circles)
{
Console.WriteLine($"Circle radius:{c.Radius}");
}
//委托的变体
SampleDelegate dNonGeneric = ASecondRFirst;
SampleDelegate dNonGenericConversion = AFirstRSecond;
SampleGenericDelegate <Second, First> dGeneric = ASecondRFirst;
SampleGenericDelegate <Second, First> dGenericConversion = AFirstRSecond;
SampleGenericDelegate <string> hahah = () => "";
SampleGenericDelegate <object> obj = hahah;
Console.ReadKey();
}
private void saveButton_Click(object sender, EventArgs e)
{
try
{
regist = new Regist();
regist.Date = dateTimePicker1.Value;
regist.Description = richTextBox1.Text;
regist.Code = textBox3.Text;
SampleGenericDelegate <Regist, int> del = new SampleGenericDelegate <Regist, int>(serverClient.InsertRegist);
IAsyncResult result = del.BeginInvoke(regist, null, null);
regist.Id = del.EndInvoke(result);
SarcIntelService.PersonView.PersonEditor person = new SarcIntelService.PersonView.PersonEditor(serverClient, regist);
person.ShowDialog(this);
person.Close();
}
catch (Exception exc)
{
var info = new InfoForm();
info.Add(exc.Message);
info.ShowDialog(this);
info.Dispose();
}
}
public PersonView(ServerServiceClient serverClient,Person p)
{
InitializeComponent();
person = p;
nameBoxText.Text = p.Name;
birthBoxText.Text = p.Birthday.ToShortDateString();
moradaBoxText.Text = p.Address;
textBox3.Text = p.Nif.ToString();
TimeSpan x = DateTime.Now - p.Birthday;
idadeBoxText.Text = (x.Days/365).ToString();
nacioBoxText.Text = p.Birthplace;
this.serverClient = serverClient;
try
{
SampleGenericDelegate<int, Regist[]> del = new SampleGenericDelegate<int, Regist[]>(serverClient.GetRegists);
IAsyncResult result = del.BeginInvoke(person.Nif, null, null);
registos = del.EndInvoke(result);
if (registos != null)
SetRegists();
}
catch (Exception e)
{
var info = new InfoForm();
info.Add(e.Message);
info.ShowDialog(this);
info.Dispose();
}
}
public void NonGeneric()
{
// Assigning a method with a matching signature
// to a non-generic delegate. No conversion is necessary.
SampleDelegate dNonGeneric = ASecondRFirst;
// Assigning a method with a more derived return type
// and less derived argument type to a non-generic delegate.
// The implicit conversion is used.
SampleDelegate dNonGenericConversion = AFirstRSecond;
// Assigning a method with a matching signature to a generic delegate.
// No conversion is necessary.
SampleGenericDelegate <Second, First> dGeneric = ASecondRFirst;
// Assigning a method with a more derived return type
// and less derived argument type to a generic delegate.
// The implicit conversion is used.
SampleGenericDelegate <Second, First> dGenericConversion = AFirstRSecond;
SampleGenericDelegate <Second, Second> dGenericConversion2 = AFirstRSecond;
// in A, out T
// 1
//dGenericConversion = dGenericConversion2;
// 2
//var genList = new List<SampleGenericDelegate<Second, First>>();
//genList.Add(dGenericConversion);
//genList.Add(dGenericConversion2);
}
public static void Test()
{
SampleGenericDelegate <String> dString = () => " ";
// You can assign delegates to each other,
// because the type T is declared covariant.
SampleGenericDelegate <Object> dObject = dString;
}
public static void Test()
{
SampleGenericDelegate <String> dString = () => " ";
// You can assign the dObject delegate
// to the same lambda expression as dString delegate
// because of the variance support for
// matching method signatures with delegate types.
SampleGenericDelegate <Object> dObject = () => " ";
// The following statement generates a compiler error
// because the generic type T is not marked as covariant.
// SampleGenericDelegate <Object> dObject = dString;
}
public void Generic()
{
SampleGenericDelegate <string> dString = () => " ";
// You can assign delegates to each other,
// because the type T is declared covariant.
// Если убрать Out, то не будет рабоать
SampleGenericDelegate <object> dObject = dString;
var genList = new List <SampleGenericDelegate <object> >();
genList.Add(dString);
genList.Add(dObject);
}
public void saveButton_Click(object sender, EventArgs e)
{
var document = new Document();
document.code = textBox1.Text;
document.emission_local = textBox2.Text;
document.emission_date = dateTimePicker2.Value;
document.expiration_date = dateTimePicker1.Value;
if (document.emission_date > document.expiration_date)
{
InfoForm info = new InfoForm();
info.Add("Aviso: Data de Emissao é maior do que data de Expiraçao !");
info.Enabled = false;
info.Visible = true;
}
else
{
DocumentType doctype = documents.FirstOrDefault(d => d.Name.Equals(comboBox1.Text));
if (doctype == null)
{
return;
}
document.Type = doctype;
serverClient.InsertPersonAsync(person);
document.Person = person;
try
{
SampleGenericDelegate <Document, int> del = new SampleGenericDelegate <Document, int>(serverClient.InsertDocument);
IAsyncResult result = del.BeginInvoke(document, null, null);
del.EndInvoke(result);
Close();
}
catch (Exception exception)
{
var info = new InfoForm();
info.Add(exception.Message);
info.ShowDialog(this);
info.Dispose();
}
}
}
public void saveButton_Click(object sender, EventArgs e)
{
var document = new Document();
document.code = textBox1.Text;
document.emission_local = textBox2.Text;
document.emission_date = dateTimePicker2.Value;
document.expiration_date = dateTimePicker1.Value;
if (document.emission_date > document.expiration_date)
{
InfoForm info = new InfoForm();
info.Add("Aviso: Data de Emissao é maior do que data de Expiraçao !");
info.Enabled = false;
info.Visible = true;
}
else
{
DocumentType doctype = documents.FirstOrDefault(d => d.Name.Equals(comboBox1.Text));
if (doctype == null) return;
document.Type = doctype;
serverClient.InsertPersonAsync(person);
document.Person = person;
try
{
SampleGenericDelegate<Document, int> del = new SampleGenericDelegate<Document, int>(serverClient.InsertDocument);
IAsyncResult result = del.BeginInvoke(document, null, null);
del.EndInvoke(result);
Close();
}
catch (Exception exception)
{
var info = new InfoForm();
info.Add(exception.Message);
info.ShowDialog(this);
info.Dispose();
}
}
}
static void Main(string[] args)
{
// Assigning a method with a matching signature
// to a non-generic delegate. No conversion is necessary.
SampleDelegate dNonGeneric = ASecondRFirst;
// Assigning a method with a more derived return type
// and less derived argument type to a non-generic delegate.
// The implicit conversion is used.
SampleDelegate dNonGenericConversion = AFirstRSecond;
// Assigning a method with a matching signature to a generic delegate.
// No conversion is necessary.
SampleGenericDelegate <Second, First> dGeneric = ASecondRFirst;
// Assigning a method with a more derived return type
// and less derived argument type to a generic delegate.
// The implicit conversion is used.
SampleGenericDelegate <Second, First> dGenericConversion = AFirstRSecond;
}
private void AddRegist(Regist r)
{
SampleGenericDelegate <int, CrimeType[]> del = new SampleGenericDelegate <int, CrimeType[]>(serverClient.GetAllCrimeTypeByRegist);
IAsyncResult result = del.BeginInvoke(r.Id, null, null);
var crimes = del.EndInvoke(result);
DataGridViewComboBoxColumn comb = (DataGridViewComboBoxColumn)dataGridView2.Columns[1];
foreach (CrimeType c in crimes)
{
comb.Items.Add(c.Name);
}
dataGridView2.Rows.Add(new object[] { r.Id, crimes[0].Name, r.Date.ToShortDateString() });
}
public Participants(ServerServiceClient serverClient,Regist regist)
{
InitializeComponent();
this.serverClient = serverClient;
SampleGenericDelegate<int, Person[]> del = new SampleGenericDelegate<int, Person[]>(serverClient.GetAllPersonByIdRegist);
IAsyncResult result= del.BeginInvoke(regist.Id, null, null);
this.persons=del.EndInvoke(result);
this.regist = regist;
foreach (Person p in persons)
dataGridView1.Rows.Add(new object[]
{
p.Nif, p.Name, p.Address, p.Birthday.ToShortDateString(), p.Birthplace,
});
}
private void AddRegist(Regist r)
{
SampleGenericDelegate<int,CrimeType[]> del = new SampleGenericDelegate<int,CrimeType[]>(serverClient.GetAllCrimeTypeByRegist);
IAsyncResult result = del.BeginInvoke(r.Id,null, null);
CrimeType[] crimes = del.EndInvoke(result);
DataGridViewComboBoxColumn comb = (DataGridViewComboBoxColumn)dataGridView1.Columns[1];
foreach (CrimeType c in crimes)
comb.Items.Add(c.Name);
SampleGenericDelegate<int, int> dele = new SampleGenericDelegate<int, int>(serverClient.GetNumberOfParticipants);
IAsyncResult result2 = dele.BeginInvoke(r.Id, null, null);
int count = dele.EndInvoke(result2);
dataGridView1.Rows.Add(new object[] {r.Id,crimes[0].Name,r.Date.ToShortDateString(),count});
}
public Participants(ServerServiceClient serverClient, Regist regist)
{
InitializeComponent();
this.serverClient = serverClient;
SampleGenericDelegate <int, Person[]> del = new SampleGenericDelegate <int, Person[]>(serverClient.GetAllPersonByIdRegist);
IAsyncResult result = del.BeginInvoke(regist.Id, null, null);
this.persons = del.EndInvoke(result);
this.regist = regist;
foreach (Person p in persons)
{
dataGridView1.Rows.Add(new object[]
{
p.Nif, p.Name, p.Address, p.Birthday.ToShortDateString(), p.Birthplace,
});
}
}
public static void Test()
{
SampleGenericDelegate <String> dString = () => " ";
// You can assign the dObject delegate
// to the same lambda expression as dString delegate
// because of the variance support for
// matching method signatures with delegate types.
SampleGenericDelegate <Object> dObject = () => " ";
// The following statement generates a compiler error
// because the generic type T is not marked as covariant.
//SampleGenericDelegate <Object> dObject = dString;
Action <object> actObj = x => Console.WriteLine("object: {0}", x);
Action <string> actStr = x => Console.WriteLine("string: {0}", x);
// All of the following statements throw exceptions at run time.
//Action<string> actCombine = actStr + actObj;
//actStr += actObj;
//Delegate.Combine(actStr, actObj);
}
public PersonView(ServerServiceClient serverClient, Person p)
{
InitializeComponent();
person = p;
nameBoxText.Text = p.Name;
birthBoxText.Text = p.Birthday.ToShortDateString();
moradaBoxText.Text = p.Address;
textBox3.Text = p.Nif.ToString();
TimeSpan x = DateTime.Now - p.Birthday;
idadeBoxText.Text = (x.Days / 365).ToString();
nacioBoxText.Text = p.Birthplace;
this.serverClient = serverClient;
try
{
SampleGenericDelegate <int, Regist[]> del = new SampleGenericDelegate <int, Regist[]>(serverClient.GetRegists);
IAsyncResult result = del.BeginInvoke(person.Nif, null, null);
registos = del.EndInvoke(result);
if (registos != null)
{
SetRegists();
}
}
catch (Exception e)
{
var info = new InfoForm();
info.Add(e.Message);
info.ShowDialog(this);
info.Dispose();
}
}
private void AddRegist(Regist r)
{
SampleGenericDelegate <int, CrimeType[]> del = new SampleGenericDelegate <int, CrimeType[]>(serverClient.GetAllCrimeTypeByRegist);
IAsyncResult result = del.BeginInvoke(r.Id, null, null);
CrimeType[] crimes = del.EndInvoke(result);
DataGridViewComboBoxColumn comb = (DataGridViewComboBoxColumn)dataGridView1.Columns[1];
foreach (CrimeType c in crimes)
{
comb.Items.Add(c.Name);
}
SampleGenericDelegate <int, int> dele = new SampleGenericDelegate <int, int>(serverClient.GetNumberOfParticipants);
IAsyncResult result2 = dele.BeginInvoke(r.Id, null, null);
int count = dele.EndInvoke(result2);
dataGridView1.Rows.Add(new object[] { r.Id, crimes[0].Name, r.Date.ToShortDateString(), count });
}
static void Main(string[] args)
{
// Assignment compatibility
// 赋值兼容
string str = "test";
// An object of a more derived type is assigned to an object of a less derived type.
// 派生程度较大的类型可以赋值给派生程度较小的类型
object obj = str;
object[] strs = new string[] { "a", "b", "c" };
strs[0] = 3;// ArrayTypeMismatchException exception
List <Giraffe> giraffes = new List <Giraffe>();
giraffes.Add(new Giraffe());
//List<Animal> animals = giraffes;
//animals.Add(new Lion()); // Aargh!
// Assigning a method with a matching signature
// to a non-generic delegate. No conversion is necessary.
// 将签名完全匹配的方法赋值给委托，无需转换
SampleDelegate d1 = RL1PL3;
// Assigning a method with a more derived return type
// and less derived argument type to a non-generic delegate.
// The implicit conversion is used.
// 将一个返回值的派生程度更大（协变），参数值的派生程度更小（逆变）的方法赋值给委托
SampleDelegate d2 = RL2PL2;
// 方法返回值派生程度继续变大，参数值的派生程度继续变小
SampleDelegate dNonGenericConversion1 = RL3PL1;
// 一个委托就可以适用于全部返回值、参数组合
// 使代码更通用
SampleDelegate sd1 = RL1PL1;
SampleDelegate sd2 = RL1PL2;
SampleDelegate sd3 = RL1PL3;
SampleDelegate sd4 = RL2PL1;
SampleDelegate sd5 = RL2PL2;
SampleDelegate sd6 = RL2PL3;
SampleDelegate sd7 = RL3PL1;
SampleDelegate sd8 = RL3PL2;
SampleDelegate sd9 = RL3PL3;
// 泛型委托类似：
SampleGenericDelegate <L3, L1> dg1 = RL1PL1;
SampleGenericDelegate <L3, L1> dg2 = RL1PL2;
SampleGenericDelegate <L3, L1> dg3 = RL1PL3;
SampleGenericDelegate <L3, L1> dg4 = RL2PL1;
SampleGenericDelegate <L3, L1> dg5 = RL2PL2;
SampleGenericDelegate <L3, L1> dg6 = RL2PL3;
SampleGenericDelegate <L3, L1> dg7 = RL3PL1;
SampleGenericDelegate <L3, L1> dg8 = RL3PL2;
SampleGenericDelegate <L3, L1> dg9 = RL3PL3;
SampleGenericDelegate1 <string> dString = () => " ";
SampleGenericDelegate1 <object> dObject1 = () => " ";
// The following statement generates a compiler error
// 如果不使用 out 显示指明委托的结果支持逆变，下面的一行代码无法编译通过
SampleGenericDelegate1 <object> dObject = dString;
IEnumerable <string> listL3 = new List <string>();
IEnumerable <object> lis = listL3;
// 协变
var employees = new List <Teacher>();
PrintFullName(employees);
// 协变
var students = new List <Student>();
PrintFullName(students);
// 协变 逆变只适用于引用类型
IEnumerable <int> listOfInt = new List <int>();
//IEnumerable<object> lo = listOfInt;
// You can pass ShapeAreaComparer, which implements IComparer<Shape>,
// even though the constructor for SortedSet<Circle> expects
// IComparer<Circle>, because type parameter T of IComparer<T> is
// contravariant.
// SortedSet<Circle> 的构造函数需要IComparer<Circle>，但仍然可以传入是实现IComparer<Shape>的ShapeAreaComparer
SortedSet <Circle> circlesByArea =
new SortedSet <Circle>(new ShapeAreaComparer())
{
new Circle(7.2), new Circle(100), null, new Circle(.01)
};
foreach (Circle c in circlesByArea)
{
Console.WriteLine(c == null ? "null" : "Circle with area " + c.Area);
}
}
private void AddRegist(Regist r)
{
SampleGenericDelegate<int, CrimeType[]> del = new SampleGenericDelegate<int, CrimeType[]>(serverClient.GetAllCrimeTypeByRegist);
IAsyncResult result = del.BeginInvoke(r.Id, null, null);
var crimes = del.EndInvoke(result);
DataGridViewComboBoxColumn comb = (DataGridViewComboBoxColumn)dataGridView2.Columns[1];
foreach (CrimeType c in crimes)
comb.Items.Add(c.Name);
dataGridView2.Rows.Add(new object[] { r.Id, crimes[0].Name, r.Date.ToShortDateString() });
}
private void saveButton_Click(object sender, EventArgs e)
{
try
{
regist = new Regist();
regist.Date = dateTimePicker1.Value;
regist.Description = richTextBox1.Text;
regist.Code = textBox3.Text;
SampleGenericDelegate<Regist,int> del = new SampleGenericDelegate<Regist,int>(serverClient.InsertRegist);
IAsyncResult result = del.BeginInvoke(regist,null, null);
regist.Id = del.EndInvoke(result);
SarcIntelService.PersonView.PersonEditor person = new SarcIntelService.PersonView.PersonEditor(serverClient,regist);
person.ShowDialog(this);
person.Close();
}
catch (Exception exc)
{
var info = new InfoForm();
info.Add(exc.Message);
info.ShowDialog(this);
info.Dispose();
}
}
