static void Main(string[] args)
{
Demo.Test();
Console.ReadKey();
}
static void Main()
{
Console.WriteLine("Hello World!! This is Sophy");
Console.WriteLine("Press any key to continue");
//Console.ReadLine();
myClass c = new myClass();
//Console.ReadLine();
myEnum e = new myEnum();
Test obj = new Test();
obj.Check();
Test obj2 = new Test(200);
obj2.Check();
Test obj3 = new Test(300);
obj3.Check();
int i = 0;
String outStr1 = Test.GetNextNameByRef(ref i);
Console.WriteLine(outStr1);
Console.WriteLine("ref Current value of integer i: " + i.ToString());
outStr1 = Test.GetNextNameByRef(ref i);
Console.WriteLine(outStr1);
Console.WriteLine("ref Current value of integer i: " + i.ToString());
outStr1 = Test.GetNextNameByRef(i);
Console.WriteLine(outStr1);
Console.WriteLine("Current value of integer i: " + i.ToString());
outStr1 = Test.GetNextNameByRef(i);
Console.WriteLine(outStr1);
Console.WriteLine("Current value of integer i: " + i.ToString());
Console.WriteLine("Previous value of integer i: " + i.ToString());
outStr1 = Test.GetNextNameByOut(out i);
Console.WriteLine(outStr1);
Console.WriteLine("out Current value of integer i: " + i.ToString());
outStr1 = Test.GetNextNameByOut(out i);
Console.WriteLine(outStr1);
Console.WriteLine("out Current value of integer i: " + i.ToString());
int x = 10;
Test.Show(x);
Console.WriteLine("Not Ref paramter get value from outside called method: " + x); //10
Test.Show(ref x);
Console.WriteLine("Ref paramter get value from called method: " + x); //10+23=33
Test.Show(ref x);
Console.WriteLine("Ref paramter get value from called method: " + x); //33+23=56
Test.Show(x);
Console.WriteLine("Not Ref paramter get value from outside called method: " + x); //56
Test.Show(x);
Console.WriteLine("Not Ref paramter get value from outside called method: " + x); //56
Test.ShowOut(out x);
Console.WriteLine("Out paramter get value from called method: " + x); //23+23=46 value in called method
Demo d = new Demo();
d.Show();
Demo d1 = new Demo(44);
d1.Show();
Person p = new Person();
p.Name = "Sophy Yang";
p.State = "IA";
Console.WriteLine("Your Name is {0}", p.Name);
Console.WriteLine("Your State is {0}", p.State);
//p.Company = "Multi-State Lottery Association"; readOnly cannot assign value
Console.WriteLine("You are working at {0}", p.Company);
p.Notes = "This is the testing C#";
Console.WriteLine("Notes: {0}", p.showNotes); //Notes is writeOnly can not get it
Person objPerson = new Person()
{
Name = "Suki Bunny",
Age = 24,
City = "Des Moines",
State = "IA"
};
Console.WriteLine("New Person Name: {0}", objPerson.Name);
//Voter objVoter = new Voter();
//Console.Write("Please enter your age: ");
//objVoter.Age = Convert.ToInt32(Console.ReadLine());
//Console.WriteLine("Your age is: {0} years", objVoter.Age);
//d.showDateTime();//non-static class need use new to created
//Demo.ShowPressedKey(); //static class, been call by name
//Demo.doMath(); //static class call by name no need new
//Student objStudent = new Student();
//Console.WriteLine("Please enter your marks: ");
//objStudent.Marks = Convert.ToInt32(Console.ReadLine());
//Console.WriteLine("Your marks are: {0} marks", objStudent.Marks);
////Console.ReadKey();
try
{
Employee objEmployee = new Employee()
{
EmployeeId = 1001,
Name = "Sophy"
};
Console.WriteLine("Employee Id is: {0} and Employee Name is {1}", objEmployee.EmployeeId, objEmployee.Name);
objEmployee.SetID(-30);
Console.WriteLine("Employee Id is: {0} and Employee Name is {1}", objEmployee.EmployeeId, objEmployee.Name);
Console.WriteLine("{1} your bonus: {0}", objEmployee.Bonus, objEmployee.Name);
//Console.ReadKey();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Class1 ob = new Class1();
Console.WriteLine(ob.Display());
Console.WriteLine(ob.Print());
ob.NewMethod();
ClassLibrary1.Class1 ob_dll = new ClassLibrary1.Class1();
Console.WriteLine(ob_dll.Display());
Console.WriteLine(ob_dll.Print());
ob_dll.NewMethod();
string str = "12345";
int num = str.IntegerExtension();
Console.WriteLine("The output using extension method: {0}", num);
str = "This is sophy testing, total words count is 14, total char count is 57";
num = str.WordCount();
Console.WriteLine("Total word count: {0}", num);
num = str.TotalCharWithoutSpace();
Console.WriteLine("Total char count: {0}", num);
//Write text to a new file
// the Dispose method is invoked which automatically flushes and closes the stream.
string[] lines = { "First line", "Second line", "Third line" };
string mydocpath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
using (StreamWriter outputFile = new StreamWriter(Path.Combine(mydocpath, "sophyWriteLines.txt")))
{
foreach (string line in lines)
{
outputFile.WriteLine(line);
}
}
Console.WriteLine(mydocpath);
//Append text
using (StreamWriter outputfile = new StreamWriter(Path.Combine(mydocpath, "sophyWriteLines.txt"), true))
{
outputfile.WriteLine("Four line");
}
// Write the text asynchronously to a new file
//ClassLibrary1.Class1.WriteTextAsync("hi, this is sophy writing the text asynchronously");
string val = "Hello";
val += " am ";
val += "Nitin Pandit";
Console.WriteLine(val);
StringBuilder val_sb = new StringBuilder("");
val_sb.Append("Hello ");
val_sb.Append(" am Nitin Pandit: ");
Console.WriteLine(val_sb);
//Demo.DoStringStringBuilder();
string string1 = "Today is " + DateTime.Now.ToString();
Console.WriteLine(string1);
string string2 = "Hi " + "This is Sophy";
string2 += " Yang";
//Console.WriteLine(string2);
StringBuilder Number = new StringBuilder(100);
for (int z = 0; z < 10; z++)
{
Number.Append(z);
}
//Console.WriteLine(Number);
Console.WriteLine("===== Delegate Demo ====== ");
TestDelegate obj_delegate = new TestDelegate();
obj_delegate.delObject("sophy");
DelegateDemo objD = new DelegateDemo(); //DelegateDemo is class, new will call default constractor
objD.delObject("SophyYang"); //delObject is delegate signed by new
objD.delObject2("Sukibunny"); //delObject2 is delegate signed by new
Console.WriteLine("===== Delegate Demo ====== ");
//pass method as parameter: delegate
delmethod del1 = DelegateDemo.show; //show() is public static method, delmethod is delegate class
delmethod del2 = new delmethod(DelegateDemo.display); //display is public static method
delmethod del3 = objD.print; //print is not static method, so need new created object
del1();
del2();
del3();
Console.WriteLine("===== multicast Delegate Demo ====== ");
multidelmethod del4 = new multidelmethod(objD.plus_Method); //plus_method is not static method
del4 += new multidelmethod(objD.substract_Method); //substract_method is not static method
del4(20, 10);
Console.WriteLine("===== Anonymous Delegate Demo ====== ");
AnonymousDelMethod Display = delegate() //lambda expression
{
Console.WriteLine("Anonymous Delegate method");
};
Display();
Console.WriteLine("===== Event Delegate Demo ====== ");
objD.MyEvent += new eventdelmethod(objD.Display); //Display is not static method
//MyEvent will execuite method Display in class DelegateDemo
objD.RaiseEvent();
Console.WriteLine("===== Multi Event Delegate Demo ====== ");
objD.MyMultiEven += new multidelmethod(objD.Add);
objD.MyMultiEven += new multidelmethod(objD.Subtract);
objD.RaiseMultiEvent(30, 50); //output 80, -20
Console.WriteLine("===== Partial classes Demo ====== ");
PartialClasses pc = new PartialClasses();
pc.Function1();
pc.Function2();
ExceptionDemo eDemo = new ExceptionDemo();
try
{
//all 2 lines below are working
eDemo.ExceptionMethod();
//eDemo.AnotherMethod();
}
catch (Exception ex)
{
//all 3 lines below are working
//throw ex;
//throw new ApplicationException("Sophy's exception could not get data", ex);
Console.WriteLine("throw Sophy's exception (" + ex.Message + ")");
}
string[] strArr = new string[1];
eDemo.SophyExceptionArgumentDemo(strArr);
strArr[0] = "2";
eDemo.SophyExceptionArgumentDemo(strArr);
i = 123456;
Console.WriteLine("{0:C}", i); // $123,456.00 Currency
Console.WriteLine($"{i:C}"); //$
Console.WriteLine("{0:D}", i); // 123456 Decimal
Console.WriteLine("{0:E}", i); // 1.234560E+005 Exponent
Console.WriteLine("{0:F}", i); // 123456.00 Fixed point
Console.WriteLine("{0:G}", i); // 123456 General
Console.WriteLine("{0:N}", i); // 123,456.00 Currency
Console.WriteLine("{0:P}", i); // 12,345,600.00 %
Console.WriteLine("{0:X}", i); // 1E240 Hex
i = 123456;
Console.WriteLine();
Console.WriteLine("{0:#0}", i); // 123456
Console.WriteLine("{0:#0;(#0)}", i); // 123456
Console.WriteLine("{0:#0;(#0);}", i); // 123456
Console.WriteLine("{0:#%}", i); // 12345600%
i = -123456;
Console.WriteLine();
Console.WriteLine("{0:#0}", i); // -123456
Console.WriteLine("{0:#0;(#0)}", i); // (123456)
Console.WriteLine("{0:#0;(#0);}", i); // (123456)
Console.WriteLine("{0:#%}", i); // -12345600%
i = 0;
Console.WriteLine();
Console.WriteLine("{0:#0}", i); // 0
Console.WriteLine("{0:#0;(#0)}", i); // 0
Console.WriteLine("{0:#0;(#0);}", i); //
Console.WriteLine("{0:#%}", i); // %
MultiDeleTest md = new MultiDeleTest();
Class1 c1 = new Class1();
Class2 c2 = new Class2();
DelegateDemo c3 = new DelegateDemo();
IsTest.Test(c1);
IsTest.Test(c2);
IsTest.Test(c3);
IsTest.Test("Passing String Value instead of class");
IsTest.asTest();
Demo.NullableDemo();
CompareTwoClass compareTwoClass = new CompareTwoClass(); //CompareTwoClassTest is static so don't need keywork "new" to call it
AClass aclass = new AClass(); //AClass is not static so need use keywork "new"
BClass bclass = new BClass();
aclass.AMethod();
bclass.AMethod();
bclass.B2Method();
bclass.B3Method();
bclass.B4Method();
Console.WriteLine(bclass.GetHashCode()); //return 21083178
DataTypeConversion dataTypeConversion = new DataTypeConversion();
BoxingUnboxing boxingUnboxing = new BoxingUnboxing();
StructDemo structDemo = new StructDemo();
//StructDemo structDemo1 = new StructDemo(10,10);
StructDemo structDemo1; //don't need use new keywork to create a object
structDemo1.x = 10;
structDemo1.y = 20;
Console.WriteLine($"Struct Demo 1: x = {structDemo.x} y = {structDemo.y }");
Console.WriteLine($"Struct Demo 2: x = {structDemo1.x} y = {structDemo1.y }");
StructurePerson strX = new StructurePerson(); //structure is value type
StructurePerson strY = new StructurePerson();
strX.FirstName = "Sophy";
strX.LastName = "Yang";
strY.FirstName = "Sophy";
strY.LastName = "Yang";
if (strX.Equals(strY))
{
Console.WriteLine("strX = strY"); //will return this, struct is value type
}
else
{
Console.WriteLine("strX != strY");
}
ClassPerson clsX = new ClassPerson(); //class is reference type, object 1
ClassPerson clsY = new ClassPerson(); //class is reference type, object 2
ClassPerson clsZ = clsX; //clsZ is assigned to object clsX
clsX.FirstName = "Sophy";
clsX.LastName = "Yang";
clsY.FirstName = "Sophy";
clsY.LastName = "Yang";
if (clsX.Equals(clsY))
{
Console.WriteLine("clsX = clsY");
}
else
{
Console.WriteLine("clsX != clsY"); //will return this, class is reference type
}
clsX.FirstName = "Michael";
if (clsX.Equals(clsZ))
{
Console.WriteLine("clsX = clsZ"); //will return this, since clsZ assigned object clsX
}
else
{
Console.WriteLine("clsX != clsZ");
}
Cinterface.InterfaceTest(); //in interface1.cs public static method
Square.AbstractDemoTest(); //in AbstractDemo.cs public static method
DerivedClass.DerivedClassTest(); //in AbstractDemo.cs public static method
Bike.BikeTest(); //in AbstractDemo.cs public static method
B.InterfaceTest();
EnumDemo.EnumDemoTest();
refVSout.refVSoutTest();
EmployeeTest.EmployeeDemo();
StudentTest.StudentTestDemo();
p.FistName = "MyFirstName";
p.LastName = "MyLastName";
Console.WriteLine("My full name is {0}", p.FullName);
//p.FullName = "Sophy Yang"; read only cannot assigned value, only has get no set
try
{
p.FistName = null;
p.LastName = "Yang";
Console.WriteLine("My full name is {0} ", p.FullName);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
ExtensionMethodDemoTest.ExtemsionMethod();
StringVsStringBuilder s_sb = new StringVsStringBuilder();
//DelegateDemo delegateDemo = new DelegateDemo();
SealedClassTest sealedClassTest = new SealedClassTest();
SealedClassDemo sealedClassDemo = new SealedClassDemo();
sealedClassDemo.Add(6, 9);
SealedClassTest.runSealedClass(); //static method cannot access by new keyword object
SimpleDelegate simpleDelegate = new SimpleDelegate();
simpleDelegate.NameDemo();
Console.WriteLine("Name: " + p.Name);
p.Address1 = "1100 Locust Street";
p.Address2 = "Suit 100";
p.City = "Des Moines";
p.Zip = 50309;
Console.WriteLine(p.SecondHomeAddress());
Console.WriteLine(p.CompanyAddress());
Console.WriteLine("");
Console.WriteLine("");
IEnumerableDemo ie = new IEnumerableDemo();
YieldReturnDemo yr = new YieldReturnDemo();
LateBindingEarlyBinding lbeb = new LateBindingEarlyBinding();
//ManyToManyEfSample2 mtm2 = new ManyToManyEfSample2();
//has error
ConflictingMethodName cfMethod = new ConflictingMethodName();
int xO = 5;
int yO = xO / 10;
Console.WriteLine("5/10=" + yO);
yO = xO % 10;
Console.WriteLine("5%10=" + yO);
List <string> list = new List <string>();
list.Add("a");
list.Add("b");
list.Add("c");
string result = list.Find(item => item == "a");
if (list.Find(item => item == "a") is null)
{
Console.WriteLine("Not Find in List item: ");
}
else
{
Console.WriteLine("Find List item: " + result);
}
string s = "abcabcbb";
int largeCount = 0;
string largeStr = string.Empty;
int i1;
for (i1 = 0; i1 < s.Length; i1++)
{
List <string> l = new List <string>();
int count = 0;
string str1 = string.Empty;
for (int j = i1; j < s.Length; j++)
{
string s1 = s.Substring(j, 1);
if (l.Find(item => item == s1) is null)
{
l.Add(s.Substring(j, 1));
count += 1;
str1 += s1;
Console.WriteLine("The large string lenght is " + largeCount + " (" + l.Count + ") " + count);
}
i1 = j;
if (largeCount < count)
{
largeCount = i1;
largeStr = str1;
}
}
}
Console.WriteLine("The large string lenght is " + largeCount + " (" + largeStr + ") ");
Console.WriteLine("0%2=" + 0 % 2);
LeetCode le = new LeetCode();
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Demo obj = new Demo();
}
static void Main(string[] args)
{
//Goi ham delegate
ShowLog showLog;
showLog = Info; //showLog gan bang phuong thuc Info
showLog("Sung Mi No"); //Thi hanh delegate chinh la thi hanh Info
showLog = Warning; //showLog gan bang phuong thuc Warning
showLog("Lop CNTT2.01-K61");
//Gan 1 phuong thuc Anonymou(nac danh) cho delegate
showLog += (x) => { Console.WriteLine(string.Format("===>{0}<===", x)); };
showLog("Le Dinh Duc");
//Goi ham chua tham so delegate
TinhTog(13, 34, Info);
TinhTog(184, 23, Warning);
//--------------------------------------------------------
//Demo 1
int num1 = 0;
int num2 = 0;
Console.WriteLine("Console demo in C#\r");
Console.WriteLine("---------------------\n");
Console.WriteLine("Type a number, and then press Enter");
num1 = Convert.ToInt32(Console.ReadLine());
Console.WriteLine("Type another number, and then press Enter");
num2 = Convert.ToInt32(Console.ReadLine());
//Ask the User to choose an option
Console.WriteLine("Choose an option from the following list:");
Console.WriteLine("\ta - Add ");
Console.WriteLine("\ts - Subtrack");
Console.WriteLine("\tm - Multiply");
Console.WriteLine("\td - Divide");
Console.WriteLine("Your option? ");
//use a switch statement to do the part. Su dung 1 cau lenh de chuyen doi toan
switch (Console.ReadLine())
{
case "a":
Console.WriteLine($"Your result: {num1} + {num2} = " + (num1 + num2));
break;
case "s":
Console.WriteLine($"Your result: {num1} - {num2} = " + (num1 - num2));
break;
case "m":
Console.WriteLine($"Your result: {num1} * {num2} = " + (num1 * num2));
break;
case "d":
Console.WriteLine($"Your result: {num1} / {num2} = " + (num1 / num2));
break;
}
//wait for the user to respond befor closing. cho nguoi dung phan hoi truoc khi dong
Console.WriteLine("Next demo 2...........................................");
//----------------------------------------------------------------------
//Demo 2
//Nhap du lieu
string userLogin;
Console.Write("Nhap username: "******"Ten nhap vao la: {userLogin}");
Console.WriteLine("Ten nhap vao la: " + userLogin);
Console.Write("Nhap mot so thuc: ");
//Nhap chuoi va chuyen chuoi do thanh so thuc
double dinput = Convert.ToDouble(Console.ReadLine());
Console.WriteLine($"So da nhap la: {dinput}");
Console.WriteLine("Next demo 3...................");
//------------------------------------------------------------------
//Demo 3
Console.WriteLine("Demo 3...");
double bq = NamBK(5); //Goi ham
Console.WriteLine("Binh phuong cua 5 la: " + bq);
//Goi phuong thuc cung namespace va de public
Demo.Hello();
var max = Demo.Max(23494774, 844729282);
Console.WriteLine(max);
long thetich = Demo.TheTich(33);
Console.WriteLine(thetich);
//Dong chuong trinh
Console.Write("Press any key to end demo...");
Console.ReadKey();
}
static void Main(string[] args)
{
Console.WriteLine("Hello World!");
Console.ReadKey();
Demo.Hello("Mr");
}