Learn C# Programming - Structure & Enums
Download as PPTX, PDF0 likes182 views
This document provides an overview of structures and enums in C#. It defines a structure as a value type that allows a single variable to hold related data of different types. An example Book structure is provided to track title, author, subject, and ID. Structures can have methods, fields, properties, and implement interfaces but cannot inherit from other classes. Enums are a set of named integer constants declared with the enum keyword. Each symbol stands for an integer value one greater than the preceding symbol, starting from 0 by default. Examples of defining a Book structure and enum are demonstrated.
Learn C# Programming - Structure & Enums
- 1. Learn C# Programming Structure & Enums Eng Teong Cheah MVP in Visual Studio & Development Technologies
- 4. Structure In C#, a structure is a value type data type. It helps you to make a single variable hold related data of various data types. The struct keyword is used for creating a structure. Structures are used to represent a record. Suppose you want to keep track of your books in a library. You might want to track the following attributes about each book – - Title - Author - Subject - Book ID
- 5. Defining a Structure To define a structure, you must use the struct statement. The struct statement defines a new data type, with more than one member for your program. For example, here is the way you can declare the Book structure -
- 6. Demo – Defining a Structure
- 7. Features of C# Structures You have already used a simple structure named Books. Structures in C# are quite different from that in traditional C or C++. The C# structures have the following features - - Structures can have methods, fields, indexers, properties, operator methods and events. - Structures can have defined constructors, but not destructors. However, you cannot define a default constructor for a structure. The default constructor is automatically defined and cannot be changed. - Unlike classes, structures cannot inherit other structures or classes.
- 8. Features of C# Structures - Structures cannot be used as a base for other structures or classes. - A structure can implement one or more interfaces. - Structure members cannot be specified as abstract, virtual, or protected. - When you create a struct object using the New operator, it gets created and the appropriate constructor is called. Unlike classes, structs can be instantiated without using the New operator. - If the New operator is not used, the fields remain unassigned and the object cannot be used until all the fields are initialized.
- 9. Class versus Structure Classes and Structures have the following basic differences – - classes are reference types and structs are value types - structures do not support inheritance - structures cannot have default constructor
- 10. Demo – Class versus Structure
- 11. Enums
- 12. Enums An enumeration is a set of named integer constants. An enumerated type is declared using the enum keyword. C# enumerations are value data type. In other words, enumeration contains its own values and cannot inherit or cannot pass inheritance..
- 13. Declaring enum variable The general syntax for declaring an enumeration is – Where, - The enum_name specifies the enumeration type name. - The enumeration list is a comma-separated list of identifies.
- 14. Declaring enum variable Each of the symbols in the enumeration list stands for an integer value, one greater than the symbol that precedes it. By default, the value of the first enumeration symbol is 0. For example -
- 15. Demo – Enums
- 16. Learn C# Programming Operators & Decision Making Eng Teong Cheah MVP in Visual Studio & Development Technologies Related Content • TutorialsPoint www.tutorialspoint.com
- 17. Learn C# Programming Operators & Decision Making Eng Teong Cheah MVP in Visual Studio & Development Technologies Thank you