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VB.NET Files Tutorials

How to VB.NET Files operations

How to VB.NET Files operations

File class is using for the File operations in VB.NET. We can create , delete , copy etc. operations do with File class.

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 :

VB.NET Source Code


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:\.

VB.NET Files Related Contents
How to VB.NET Directory operations
How to VB.NET FileStream
How to VB.NET TextReader
How to VB.NET Simple TextReader
How to VB.NET TextWriter
How to VB.NET BinaryReader
How to VB.NET BinaryWriter

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