Text file operations in VB.Net

This article shows various text file operation with VB.Net.
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 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

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