Text file operations using VB.Net

In this article we will learn different text file operations such as to know file exists or not, opening and creating a file, reading and writing file, copying and deleting file.

Dim TempFile As System.IO.File
Dim TempRead As System.IO.StreamReader
Dim TempWrite As System.IO.StreamWriter

Info about file existence

If File.Exists("C:\TempText.txt") Then
    MessageBox.Show("File found")
Else
    MessageBox.Show("File not found")
End If

Create file

TempWrite = File.CreateText("C:\TempText.txt")

Open file

TempRead = File.OpenText("C:\TempText.txt")

Read file

You can also read an entire text file from the current position to the end of the file by using the ReadToEnd method, as shown in the following code :

Dim FullFileStr As String
TempRead = File.OpenText("C:\TempText.txt")
FullFileStr = TempRead.ReadToEnd()

Write file

TempWrite.WriteLine("Hello")

Copy file

Dim fileDestinationStr As String = "D:\TempText.txt"
If File.Exists("C:\TempText.txt") Then
    File.Copy("C:\TempText.txt", fileDestinationStr)
End If

Delete file

If File.Exists("C:\TempText.txt") Then
    File.Delete("C:\TempText.txt")
Else
    MessageBox.Show("File not found")
End If