/* Mastering Visual C# .NET by Jason Price, Mike Gunderloy Publisher: Sybex; ISBN: 0782129110 */ /* Example5_11.cs illustrates how to define a constructor */ // declare the Car class class Car { // declare the fields private string make; private string model; private string color; private int yearBuilt; // define the constructor public Car(string make, string model, string color, int yearBuilt) { System.Console.WriteLine("In Car() constructor"); this.make = make; this.model = model; this.color = color; this.yearBuilt = yearBuilt; } // define a method to display the fields public void Display() { System.Console.WriteLine("Car details:"); System.Console.WriteLine("make = " + make); System.Console.WriteLine("model = " + model); System.Console.WriteLine("color = " + color); System.Console.WriteLine("yearBuilt = " + yearBuilt); } } public class Example5_11 { public static void Main() { // create a Car object using the constructor // defined in the class Car myCar = new Car("Toyota", "MR2", "black", 1995); // display the values for the Car object fields myCar.Display(); } }
ASP.NET & Csharp (C#)
ASP.NET & Csharp (C#) , Here you can find my posts about .NET c# .
Demonstrate invoking a constructor through this
/* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852 */ // Demonstrate invoking a constructor through this. using System; class XYCoord { public int x, y; public XYCoord() : this(0, 0) { Console.WriteLine("Inside XYCoord()"); } public XYCoord(XYCoord obj) : this(obj.x, obj.y) { Console.WriteLine("Inside XYCoord(obj)"); } public XYCoord(int i, int j) { Console.WriteLine("Inside XYCoord(int, int)"); x = i; y = j; } } public class OverloadConsDemo1 { public static void Main() { XYCoord t1 = new XYCoord(); XYCoord t2 = new XYCoord(8, 9); XYCoord t3 = new XYCoord(t2); Console.WriteLine("t1.x, t1.y: " + t1.x + ", " + t1.y); Console.WriteLine("t2.x, t2.y: " + t2.x + ", " + t2.y); Console.WriteLine("t3.x, t3.y: " + t3.x + ", " + t3.y); } }
Demonstrate an overloaded constructor
/* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852 */ // Demonstrate an overloaded constructor. using System; class MyClass { public int x; public MyClass() { Console.WriteLine("Inside MyClass()."); x = 0; } public MyClass(int i) { Console.WriteLine("Inside MyClass(int)."); x = i; } public MyClass(double d) { Console.WriteLine("Inside MyClass(double)."); x = (int) d; } public MyClass(int i, int j) { Console.WriteLine("Inside MyClass(int, int)."); x = i * j; } } public class OverloadConsDemo { public static void Main() { MyClass t1 = new MyClass(); MyClass t2 = new MyClass(88); MyClass t3 = new MyClass(17.23); MyClass t4 = new MyClass(2, 4); Console.WriteLine("t1.x: " + t1.x); Console.WriteLine("t2.x: " + t2.x); Console.WriteLine("t3.x: " + t3.x); Console.WriteLine("t4.x: " + t4.x); } }
Add more constructors to TwoDShape
/* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852 */ // Add more constructors to TwoDShape. using System; class TwoDShape { double pri_width; // private double pri_height; // private // Default constructor. public TwoDShape() { width = height = 0.0; } // Constructor for TwoDShape. public TwoDShape(double w, double h) { width = w; height = h; } // Construct object with equal width and height. public TwoDShape(double x) { width = height = x; } // Properties for width and height. public double width { get { return pri_width; } set { pri_width = value; } } public double height { get { return pri_height; } set { pri_height = value; } } public void showDim() { Console.WriteLine("Width and height are " + width + " and " + height); } } // A derived class of TwoDShape for triangles. class Triangle : TwoDShape { string style; // private /* A default constructor. This automatically invokes the default constructor of TwoDShape. */ public Triangle() { style = "null"; } // Constructor that takes three arguments. public Triangle(string s, double w, double h) : base(w, h) { style = s; } // Construct an isosceles triangle. public Triangle(double x) : base(x) { style = "isosceles"; } // Return area of triangle. public double area() { return width * height / 2; } // Display a triangle's style. public void showStyle() { Console.WriteLine("Triangle is " + style); } } public class Shapes5 { public static void Main() { Triangle t1 = new Triangle(); Triangle t2 = new Triangle("right", 8.0, 12.0); Triangle t3 = new Triangle(4.0); t1 = t2; Console.WriteLine("Info for t1: "); t1.showStyle(); t1.showDim(); Console.WriteLine("Area is " + t1.area()); Console.WriteLine(); Console.WriteLine("Info for t2: "); t2.showStyle(); t2.showDim(); Console.WriteLine("Area is " + t2.area()); Console.WriteLine(); Console.WriteLine("Info for t3: "); t3.showStyle(); t3.showDim(); Console.WriteLine("Area is " + t3.area()); Console.WriteLine(); } }
Add constructors to TwoDShape
/* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852 */ // Add constructors to TwoDShape. using System; // A class for two-dimensional objects. class TwoDShape { double pri_width; // private double pri_height; // private // Constructor for TwoDShape. public TwoDShape(double w, double h) { width = w; height = h; } // properties for width and height. public double width { get { return pri_width; } set { pri_width = value; } } public double height { get { return pri_height; } set { pri_height = value; } } public void showDim() { Console.WriteLine("Width and height are " + width + " and " + height); } } // A derived class of TwoDShape for triangles. class Triangle : TwoDShape { string style; // private // Call the base class constructor. public Triangle(string s, double w, double h) : base(w, h) { style = s; } // Return area of triangle. public double area() { return width * height / 2; } // Display a triangle's style. public void showStyle() { Console.WriteLine("Triangle is " + style); } } public class Shapes4 { public static void Main() { Triangle t1 = new Triangle("isosceles", 4.0, 4.0); Triangle t2 = new Triangle("right", 8.0, 12.0); Console.WriteLine("Info for t1: "); t1.showStyle(); t1.showDim(); Console.WriteLine("Area is " + t1.area()); Console.WriteLine(); Console.WriteLine("Info for t2: "); t2.showStyle(); t2.showDim(); Console.WriteLine("Area is " + t2.area()); } }
Add a constructor to Triangle
/* C#: The Complete Reference by Herbert Schildt Publisher: Osborne/McGraw-Hill (March 8, 2002) ISBN: 0072134852 */ // Add a constructor to Triangle. using System; // A class for two-dimensional objects. class TwoDShape { double pri_width; // private double pri_height; // private // properties for width and height. public double width { get { return pri_width; } set { pri_width = value; } } public double height { get { return pri_height; } set { pri_height = value; } } public void showDim() { Console.WriteLine("Width and height are " + width + " and " + height); } } // A derived class of TwoDShape for triangles. class Triangle : TwoDShape { string style; // private // Constructor public Triangle(string s, double w, double h) { width = w; // init the base class height = h; // init the base class style = s; // init the derived class } // Return area of triangle. public double area() { return width * height / 2; } // Display a triangle's style. public void showStyle() { Console.WriteLine("Triangle is " + style); } } public class Shapes3 { public static void Main() { Triangle t1 = new Triangle("isosceles", 4.0, 4.0); Triangle t2 = new Triangle("right", 8.0, 12.0); Console.WriteLine("Info for t1: "); t1.showStyle(); t1.showDim(); Console.WriteLine("Area is " + t1.area()); Console.WriteLine(); Console.WriteLine("Info for t2: "); t2.showStyle(); t2.showDim(); Console.WriteLine("Area is " + t2.area()); } }
Constructor overloading 3
/* * C# Programmers Pocket Consultant * Author: Gregory S. MacBeth * Email: gmacbeth@comporium.net * Create Date: June 27, 2003 * Last Modified Date: */ using System; namespace Client.Chapter_5___Building_Your_Own_Classes { public class CTORChapter { public int[] MyIntArray; public int Y; //Initialization can take place here private int ObjectCount = 0; static void Main(string[] args) { CTORChapter X = new CTORChapter(); X.ObjectCount++; CTORChapter YY = new CTORChapter(10); } //Default CTORChapter CTORChapter() { MyIntArray = new int[10]; //Do work necessary during object creation } //Overloads the CTOR allowing you to initialize Y CTORChapter(int myY) { Y = myY; } } }