Geometry

Complete version (all in one file) - All 57 sections combined in a single document for easy reading or printing.

Table of Contents

• 1 - Introduction to OOP
• 1.1 Summary
• 1.2 Creating a class
• 1.3 Using a class
• 1.4 Constructors
• 1.5 Static versus non-static
• 1.6 Class diagram
• 2 - Encapsulation and constructor chaining
• 2.1 Summary
• 2.2 Encapsulation
• 2.3 Constants
• 2.4 Constructor chaining
• 2.5 Arrays of objects
• 2.6 Class diagram
• 3 - Classes as attribute (Point, Circle, Rectangle)
• 3.1 Summary
• 3.2 Classes as attribute
• 3.3 Class diagram
• 3.4 Relationship between Circle and Point
• 3.5 The Rectangle class
• 3.6 Class diagram
• 3.7 Code for Point class
• 3.8 Code for Rectangle class
• 4 - Inheritance and ToString
• 4.1 Summary
• 4.2 Shape base class
• 4.3 Circle as derived class
• 4.4 Rectangle as derived class
• 4.5 Class diagram
• 4.6 ToString method
• 4.7 Code for Shape class
• 5 - Polymorphism and abstract classes
• 5.1 Summary
• 5.2 Polymorphism
• 5.3 Abstract classes
• 5.4 Class diagram
• 5.5 Nullable and value types
• 6 - Lists and type checking (is/as)
• 6.1 Summary
• 6.2 List
• 6.3 For loop through List
• 6.4 Surface class
• 6.5 Type checking and casting
• 6.6 Class diagram
• 7 - Interfaces (IComparable)
• 7.1 Summary
• 7.2 IComparable interface
• 7.3 Class diagram
• 8 - Exceptions
• 8.1 Summary
• 8.2 Exceptions
• 9 - File input and output
• 9.1 Summary
• 9.2 Reading from a file
• 9.3 Writing to a file
• 10 - Database access (ADO.NET with MySQL)
• 10.1 Summary
• 10.2 Setting up database and writing points
• 10.3 Reading points
• 10.4 DbAccess class
• 10.5 PointDao class
• 10.6 CircleDao class
• 10.7 Auto-increment values
• 11 - Database continued (AbstractDao)
• 11.1 Summary
• 11.2 AbstractDao class
• 11.3 Adapt PointDao
• 11.4 Refactor CircleDao

Structure

Each chapter is in its own folder with separate markdown files per section. Use the Table of Contents above to jump to any section.

Image List

Images Overview - All images on one page with descriptions.

Image	Description	Used in
MermaidGenerated/1_-_Introduction_to_OOP_1_2_Creating_a_class_001-light.svg	Mermaid diagram (SVG export)	1.2 Creating a class
Autocompletion.png	Autocompletion	1.3 Using a class
MermaidGenerated/1_-_Introduction_to_OOP_1_6_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	1.6 Class diagram
MermaidGenerated/2_-_Encapsulation_and_constructor_chaining_2_6_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	2.6 Class diagram
MermaidGenerated/3_-_Classes_as_attribute_3_2_Classes_as_attribute_001-light.svg	Mermaid diagram (SVG export)	3.2 Classes as attribute
MermaidGenerated/3_-_Classes_as_attribute_3_3_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	3.3 Class diagram
MermaidGenerated/3_-_Classes_as_attribute_3_4_Relationship_between_Circle_and_Point_001-light.svg	Mermaid diagram (SVG export)	3.4 Relationship between Circle and Point
MermaidGenerated/3_-_Classes_as_attribute_3_6_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	3.6 Class diagram
MermaidGenerated/4_-_Inheritance_and_ToString_4_2_Shape_base_class_001-light.svg	Mermaid diagram (SVG export)	4.2 Shape base class
MermaidGenerated/4_-_Inheritance_and_ToString_4_5_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	4.5 Class diagram
MermaidGenerated/5_-_Polymorphism_and_abstract_classes_5_4_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	5.4 Class diagram
SurfaceLayout1.png	Surface layout with rectangles	6.4 Surface class
SurfaceLayout2.png	Surface layout with rectangles and circles	6.4 Surface class
MermaidGenerated/6_-_Lists_and_type_checking_6_6_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	6.6 Class diagram
MermaidGenerated/7_-_Interfaces_7_3_Class_diagram_001-light.svg	Mermaid diagram (SVG export)	7.3 Class diagram
MermaidGenerated/10_-_Database_access_10_4_DbAccess_class_001-light.svg	Mermaid diagram (SVG export)	10.4 DbAccess class
MermaidGenerated/11_-_Database_continued_11_2_AbstractDao_class_001-light.svg	Mermaid diagram (SVG export)	11.2 AbstractDao class
MermaidGenerated/11_-_Database_continued_11_4_Refactor_CircleDao_001-light.svg	Mermaid diagram (SVG export)	11.4 Refactor CircleDao

Supporting files

• Rectangle.csv, CreateInsertScriptShapes.sql

Conventions

• Language: English (translated from Dutch)
• Code: C# with .NET 8
• Conventions: C# Coding Standards
• Data folder: Data/Rectangle.csv for chapter 9; Data/CreateInsertScriptShapes.sql for chapters 10-11

Database (chapters 10-11)

1. Run Data/CreateInsertScriptShapes.sql in MySQL Workbench
2. Add NuGet package: MySql.Data
3. Adjust connection string if your MySQL setup differs

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