Tag Archives: OOP

Draw a scrolling family tree in C#

Posted on January 17, 2017 by RodStephens

The example Draw a family tree in C# shows how to draw a family tree. Unfortunately if the tree is too big, you can’t make the form big enough to display it all. One solution would be to use smaller … Continue reading →

Posted in algorithms, classes, generic, graphics, OOP | Tagged algorithms, AutoScroll, C#, C# programming, classes, example, example program, family tree, generic, generic classes, graphics, MouseDown, MouseMove, nodes containing pictures, OOP, PictureNode, scroll bars, scrolling family tree, tree containing pictures, TreeNode, trees, Windows Forms programming | 1 Comment

Clone lists and arrays of objects in C#

Posted on September 28, 2016 by Rod Stephens

This is the last post I’ll write about clones, at least for a while. Some collection classes can already make clones. For example, an array can clone itself, although the result is always a shallow clone. This example shows how … Continue reading →

Posted in algorithms, OOP, syntax | Tagged algorithms, C#, C# programming, clone, clone arrays, clone collection, clone lists, clone object, copy object, example, example program, OOP, syntax, Windows Forms programming | 1 Comment

Clone serializable objects in C#

Posted on September 26, 2016 by Rod Stephens

If a class is serializable, then you can create a deep clone of an object from that class by serializing it and the deserializing it. This example uses the following code to define a generic extension method that clones objects … Continue reading →

Posted in algorithms, OOP, syntax | Tagged algorithms, C#, C# programming, clone, clone object, copy object, deep clone, example, example program, OOP, serialization, shallow clone, syntax, Windows Forms programming | 5 Comments

Use MemberwiseClone the ICloneable interface in C#

Posted on September 20, 2016 by Rod Stephens

The example Clone objects in C# explains how to give a class a Clone method that makes copies of its objects. This example makes two changes: it implements the ICloneable interface and it uses MemberwiseClone to simplify the cloning code. … Continue reading →

Posted in algorithms, OOP, syntax | Tagged algorithms, C#, C# programming, clone, clone object, copy object, deep clone, example, example program, ICloneable, ICloneable interface, MemberwiseClone, OOP, shallow, syntax, Windows Forms programming | Leave a comment

Clone objects in C#

Posted on September 19, 2016 by Rod Stephens

A clone of an object is a copy of that object. There are two kinds of clones: shallow and deep. A shallow clone shares all of the same values as the original object, even if some of those values are … Continue reading →

Posted in algorithms, OOP, syntax | Tagged algorithms, C#, C# programming, clone, clone object, copy object, deep clone, example, example program, OOP, shallow clone, syntax, Windows Forms programming | Leave a comment

Provide multiple inheritance in C#

Posted on May 12, 2016 by Rod Stephens

Sometimes you might want a class to inherit from more than one parent class. For example, you might define a Vehicle class that has vehicle properties such as MaxSpeed, and a Domicile class with house-like properties such as SquareFeet. You … Continue reading →

Posted in inheritance, interfaces, OOP | Tagged C#, C# programming, example, example program, inheritance, interface inheritance, interfaces, multiple inheritance, OOP, Windows Forms programming | Leave a comment

Define and implement an interface in C#

Posted on May 11, 2016 by Rod Stephens

(This example doesn’t do anything. It just shows how to define an interface.) An interface defines properties, methods, and events for a class but doesn’t provide an implementation for them. A class that implements the interface must provide code for … Continue reading →

Posted in interfaces, OOP | Tagged C#, C# programming, define interface, example, example program, implement interface, interface, interfaces, OOP, Windows Forms programming | Leave a comment

Override a parent class method in C#

Posted on May 3, 2016 by Rod Stephens

One of the coolest features of object-oriented programming is virtual methods. If a parent class declares a method as virtual, a child class can provide a new implementation for the method. When the program calls the method for a child … Continue reading →

Posted in classes, OOP | Tagged C#, C# programming, child class, classes, example, example program, inheritance, object-oriented programming, OOP, override, parent class, virtual, Windows Forms programming | Leave a comment

Make an initializing constructor for a child class in C#

Posted on May 3, 2016 by Rod Stephens

An initializing constructor is a constructor that takes parameters to make it easy to initialize an object’s properties. This example shows how to reuse a class’s initializing constructor for a child class. The following Person class has an initializing constructor. … Continue reading →

Posted in classes, OOP | Tagged base class, C#, C# programming, child class, classes, constructors, example, example program, initialization, initialize, initializing constructors, OOP, parent class, subclass, Windows Forms programming | Leave a comment

Use the is operator in C#

Posted on April 8, 2016 by Rod Stephens

The is operator lets you determine whether you can convert an object to a particular type. For example, suppose the Student class inherits from Person, and that student and person are objects from the obvious classes. Then, for example, the … Continue reading →