Object Orientated Programming using C# Module 201 Object Oriented Programming Lecture 1 – Introduction

Objectives What is the .NET Framework? Introduction to C# Visual Studio Forms Controls Naming conventions

.NET Framework The .NET Framework is A software development environment A runtime engine for Managed Code A platform designed for Internet-Distributed software The .NET Framework is an exciting new computing platform

.NET Framework Microsoft’s vision to introduce an improved programming experience Installed on Windows Operating Systems A software development environment A runtime engine for Managed Code

Architecture Common Language Infrastructure (CLI) .NET libraries are provided as a language-neutral platform Common Language Runtime A runtime provides services from the operating system and hardware The CLR Provides: Memory management Thread management Exception handling Garbage collection Security The CLR allows users to ignore specifics for the CPU and get on with programming the task

.NET Platform Architecture

C# Language Why C# Uses .NET framework Works with common editors Intuitive syntax Powerful features Close syntax to Java

Visual Studio Development tool for the programmer Includes Graphical User Interface (GUI) code editor supporting IntelliSense Syntax building GUI applications web designer class designer database schema designer

Visual Studio Cost Download free version Download C# version Search for Visual Studio Express 2008 Download C# version 30 days free trial – register to continue usage Or make use of DreamSpark Version

Load Visual Studio Menus Solution Explorer Toolbox Code Area Properties Messages Area

Create a Simple Project File -> New

Solution Explorer Displays all projects in solution Shows all files in project Files organisation Project references

Resources Files .resx Efficient and secure method of storing objects within application Images (PNG, BMP, GIF, JPEG, TIFF) Audio Text Strings Icons Access resources programmatically

Window Docking Floating Dockable Tabbed Document Auto hide Hide http://blogs.msdn.com/b/saraford/archive/2004/05/14/132065.aspx

Project Properties

Building Projects Build project (F6) File locations Complies code for platform Creates executable file File locations EXE file

Visual Studio Help

Forms A Form is for the creation of a Graphical User Interface Provides user interaction with the code Positioning of user controls A program can have one or more forms Forms can be various sizes

Form Controls and Properties Form Controls include Buttons Textboxes Radio buttons Check boxes Labels Sliders Tabs List boxes

Form Controls and Properties All controls have a unique name for identification within the code Control size X & Y Colour Screen position All controls don’t necessarily have the same properties

Properties Define the control’s properties Writes code for you

Form Properties Name – String AcceptButton – String CancelButton - String Icon – Windows icon BackColor - RGB Enabled – True/False Font – Style, Size, Colour Location – X,Y MaximizeSize – X/Y MinimizeSize – X/Y Size – X,Y WindowState – Maximize, Minimize, Normal

Button Properties Name – String Text - String BackColor - RGB DialogResult – OK, Cancel, Abort, Retry, Yes, No Enabled – True/False Font – Style, Size, Colour Location – X,Y Size – X,Y TextAlign – Left, Right, Centre, Top, Middle, Bottom TabIndex – int Visable – True/False

Add Controls Add the following controls Change some properties Label Button ListBox TextBox PictureBox Change some properties

Aligning Controls Use this control to align controls on a form In most cases you will need to select two or more controls to align Use the shift key to select multiple controls

Coding in C# and Visual Studio IntelliSense Microsoft's implementation of auto-completion Code is separated into several files AssemblyInfo.cs – Assembly information Author Company Version/build Form.Designer.cs - Form controls Program.cs – application code

Control Naming Controls using in your programs require appropriate naming This aids the developer by: Providing a description of the control Reduces naming conflicts Use a naming convention Modified Hungarian Notation

Simple Naming Conventions [prefixes][Basename] Prefixes - A Prefix is created to mnemonically represent the word it abbreviates, such as "frm" for "form" Basename - The base name is the your own name for the particular object btnOK txtTitle lstNames

Modified Hungarian Notation Control Prefix Label lbl ListBox lst MainMenu mnu RadioButton rad TextBox txt Timer tmr CheckBox chk ComboBox cbo Button btn Form frm GroupBox grp PictureBox pic Horizontal scroll bar hsb

Summary What is the .NET Framework? Introduction to C# Visual Studio Forms Controls Naming conventions

Next Time Primitive data types Maths operators