In this presentation i have explained about visual programming unit 4

1. VISUAL PROGRAMMING
Prepared by: Deepika M
Assistant professor
Department of commerce and management

2. Introduction
• The File System in Visual Programming deals with storing, accessing,
and managing data stored in files on a computer. Visual programming
languages like Visual Basic allow programmers to create, read, write,
and modify files using built-in classes and functions.

3. What is a File System?
• A file system is a method used by computers to organize and manage
files on storage devices.
• It helps store data permanently in files instead of only using temporary
memory (RAM).
• Visual programming provides tools to interact with the file system
through code.

4. File Type Description
Text Files (.txt) Stores data in plain text format
Binary Files (.dat, .bin) Stores data in binary form
Document Files (.docx, .pdf) Store formatted documents
Others (.csv, .json, .xml) for structured data

5. File Handling in Visual Programming (VB/VB.NET)
• File handling refers to performing operations on files such as:
• Creating a new file
• Reading data from a file
• Writing data into a file
• Appending data
• Deleting or modifying a file

6. Common Classes/Objects Used
Class/Object Purpose
File Performs basic actions like Copy, Delete, Move, Exists
FileStream Used to read/write binary data
StreamReader Reads data from text files
StreamWriter Writes data into text files
OpenFileDialog / SaveFileDialog Used to select files from the system

7. Basic File Operations Example (VB.NET)
Write to a File:
Dim writer As New System.IO.StreamWriter("C:sample.txt") writer.WriteLine("Hello File System") writer.Close()
Read from a File:
Dim reader As New System.IO.StreamReader("C:sample.txt") Dim text As String = reader.ReadToEnd() reader.Close()

8. ANY QUERIES

9. THANK YOU