How to VB.NET Files operations

By: Rajesh P.S.

The File class in VB.NET serves as a crucial component for executing various file operations. It offers a comprehensive range of functionalities, allowing developers to carry out essential tasks such as file creation, deletion, copying, and more.

File class

With the aid of the File class, developers gain access to a robust set of methods that enable seamless file management within the VB.NET framework. This class provides a reliable and efficient means to accomplish diverse file-related operations, ensuring the successful implementation of tasks.

The File class acts as a valuable resource for developers, simplifying the process of working with files in VB.NET. Its rich set of functionalities enhances productivity and enables developers to achieve their desired outcomes with precision and effectiveness.

How to create a File ?

In order to create a new File , we can call Create method in the File class.

Syntax : File.Create(FilePath)

FilePath : The name of the new File Object

File.Create("c:\testFile.txt")

How to check a File exist or not ?

Before we creating a File object , we usually check that File exist or not. For that we are using the Exists method in the File class.

Syntax : File.Exists(FilePath) as Boolean

FilePath : The name of the File
Boolean : Returns true or false , if File exist it Returns true else Returns false

VB.NET : File.Exists("c:\testFile.txt")

The following VB.NET source code shows these operations :

Imports System.IO Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click If File.Exists("c:\testFile.txt") Then 'shows message if testFile exist MsgBox("File 'testFile' Exist ") Else 'create the file testFile.txt File.Create("c:\testFile.txt") MsgBox("File 'testFile' created ") End If End Sub End Class

When you execute this source code , it first check the File exist or not , If exist it shows message file exist , else it create a new File Object .

How to Copy a File ?

If we want the Copy of the File Object we can use the Copy method in File class.

Syntax : Copy(sourceFileName, destFileName)

sourceFileName : The source file we want to move.
destFileName : The destinations file name.

VB.NET : File.Copy("c:\testFile.txt", "c:\testDir\testFile.txt")

How to delete a File Object ?

When we want to delete a File Object we can use the Delete methods in the File class.

Syntax : Delete(FilePath)

DirPath : The File Object you want to delete.

VB.NET : File.Delete("c:\testDir\testFile.txt")

The following VB.NET source code shows these operations :

Full Source VB.NET

Imports System.IO Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, _ ByVal e As System.EventArgs) Handles Button1.Click If Not File.Exists("c:\testFile.txt") Then MsgBox("FIle not exist ") Else File.Copy("c:\testFile.txt", "c:\testDir\testFile.txt") MsgBox("File Copied ") File.Delete("c:\testFile.txt") MsgBox("file deleted ") End If End Sub End Class

When you execute this program first it check whether the file exist or not , if it is not exist it shows message file does not exist, if it exist it copied the file to testDir director and it delete the file from the c:\.

Conclusion

By using the capabilities of the File class, developers can effortlessly create new files, remove existing ones, duplicate files, and perform other essential file manipulations. This empowers them to efficiently handle file-related tasks and maintain the integrity and organization of their applications.

Next > How to VB.NET FileStream

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