البرمجة بلغة VB.NET

Lecture Overview

• This document is a course outline for a computer programming course.
• The course is titled "Modern Computer Languages (part 1)"
• The instructor is Dr. Hamdi Suleiman Daraz.
• The course is offered at the Department of Educational Technology, Faculty of Education, Damietta University.

VB.NET Overview

• VB.NET is a programming language.
• Programming involves providing step-by-step instructions for a computer to perform tasks.
• A program is a set of instructions that tells a computer what to do, like performing calculations.
• A computer cannot work without specific instructions (or a program).
• Programs are created using programming languages.
• Visual Basic, C#, Delphi, Java are examples of programming languages.
• Every language uses commands in English.
• A program is also called a project, containing multiple files and objects in .NET framework.
• The IDE (Integrated Development Environment) is the set of tools used to design programs, and in .NET versions, one IDE can support multiple languages.

Introduction to Programming and VB.NET

• Computers are tools for completing tasks efficiently.

• A computer requires precise instructions to solve problems, a process called programming.

• A program is like a set of directions for the computer to carry out a specific task.

• Computers don't think, they just execute the given instructions in sequence.

• Programming aids in repetitive tasks by reducing the need to manually repeat steps.

• Calculating a student's grade exemplifies the need for programming

Programming Concepts Explained in VB.NET.

• Program: A set of instructions directing the computer to perform a specific action or operation.

• Programming language: A language used to communicate instructions to the computer.

• Programmer/Developer: Individual who creates programs by writing instructions/commands for the computer.

• IDE (Integrated Development Environment): A software tool containing various tools for program creation.

Types of Programming Languages

• Programming languages are used for instructing computers to execute tasks.

• Microsoft .NET environment introduces a framework with various supported languages, making it possible to use more than one language within the same program.

• .NET languages include Visual Basic .NET, Visual C++ .NET, Visual C# (C Sharp), ASP .NET, and Jscript .NET .

.NET Environment

• .NET (Framework): Programs within this environment are independent of the operating system and are compatible with Windows versions.

• .NET languages have both an interpreter and a compiler, allowing errors to be detected and corrected during the program's design and ensuring compatibility across different machines.

• Intermediate Language (IL): A standard language converts codes from various .NET languages into a common language to run on any computer.

• Common Language Runtime (CLR): A program execution environment translates IL codes into machine language executables.

• Object Oriented Programming (OOP): A type of programming that structures software code around 'objects' to make complex software more manageable.

Visual Studio.NET IDE Components

• IDE (Integrated Development Environment): The set of tools used to create programs.

• Visual Studio (Microsoft): Different versions exist (Professional, Team, Express).

• Visual Studio.NET Express: A free version targeting specific language support only.

• New project: Options for creating applications with different types of Windows interfaces.

• Opening an existing project or creating a new one.

Program Elements

• Form: The container within the program that displays controls, similar to Windows application windows.
• Controls (Tools): Pre-built elements (e.g., buttons, text boxes) facilitating program design.

Windows Application Design with VB.NET

• Development Tools and Techniques:

• Windows Forms Applications: Applications designed to run within the Windows operating system.

• Adding tools in program design: Dragging and dropping tools from the Toolbox.

• Selecting Elements: Selecting multiple program elements (e.g., forms or individual controls).

• Modifying tools: Modifying controls' size and location.

• Deleting elements: Removing controls from a running program.

Properties and Their Impact on Program Design

• Properties: Settings controlling an object's appearance and actions.

• Common Properties:

• Text: Specifies the display text of an object.

• ForeColor: Defines the text's color.

• BackColor: Sets the background color of the object.

• BorderStyle: Determines the border style (e.g., none, single, 3D).

• Visible: Controls the object's visibility (on or off).

• Enabled: Controll the object's interaction (enabled/disabled state).

• Name: Gives each object a unique name for reference in program commands.

Additional aspects

• Program design details, including program structure, interface design, control placement, and property adjustments.

• Example scenarios of program interaction.

• Code-based modification of properties while the program is running, including the use of commands like TextBox1.Text = "My Computer".