АкушерствоАнатомияАнестезиологияВакцинопрофилактикаВалеологияВетеринарияГигиенаЗаболеванияИммунологияКардиологияНеврологияНефрологияОнкологияОториноларингологияОфтальмологияПаразитологияПедиатрияПервая помощьПсихиатрияПульмонологияРеанимацияРевматологияСтоматологияТерапияТоксикологияТравматологияУрологияФармакологияФармацевтикаФизиотерапияФтизиатрияХирургияЭндокринологияЭпидемиология

Classes' function members in C#

Def: Function members are those members that provide some functionality for manipulating the data in the class. They include methods, properties, constructors, finalizers, operators, and indexers.

Desc: ➤ Methods are functions that are associated with a particular class. Just as with data members, function members are instance members by default. They can be made static by using the static modifier.

Ex: public bool IsSquare(Rectangle rect){

return (rect.Height == rect.Width);}

➤ Properties are sets of functions that can be accessed from the client in a similar way to the public fields of the class. C# provides a specific syntax for implementing read and write properties on your classes, so you don’t have use method names that have the words Get or Set embedded in them. Because there’s a dedicated syntax for properties that is distinct from that for normal functions, the illusion of objects as actual things is strengthened for client code. Ex: public int Age{ get

{return age;}

set

{age = value;}}

➤ Constructors are special functions that are called automatically when an object is instantiated. They must have the same name as the class to which they belong and cannot have a return type. Constructors are useful for initialization. Ex: public class MyClass{public MyClass(){} // rest of definition}

➤ Finalizers are similar to constructors but are called when the CLR detects that an object is no longer needed. They have the same name as the class, preceded by a tilde (~). It is impossible to predict precisely

when a finalizer will be called.

➤ Operators, at their simplest, are actions such as + or –. When you add two integers, you are, strictly speaking, using the + operator for integers. However, C# also allows you to specify how existing operators will work with your own classes (operator overloading).

➤ Indexers allow your objects to be indexed in the same way as an array or collection.

Дата добавления: 2015-09-18 | Просмотры: 545 | Нарушение авторских прав