vb.net read and write file code _vb.net

Reading and writing files
The following example writes one line of text to a file.

' Write text to a file
Sub Writetexttofile ()
Dim file as New System.IO.StreamWriter ("C:test.txt")
File. WriteLine ("Here's The" ")"
File. Close ()
End Sub
The following example reads the text in a file into a string variable and then writes the text to the console.

Sub Readtextfromfile ()
Dim file as New System.IO.StreamReader ("C:test.txt")
Dim words as String = file. ReadToEnd ()
Console.WriteLine (words)
File. Close ()
End Sub
The following example adds text to an existing file.

Sub Appendtexttofile ()
Dim file as New System.IO.StreamWriter ("C:test.txt", True)
File. WriteLine ("Here's another line.")
File. Close ()
End Sub
The following example reads one row from a file at a time, and then prints each line of text to the console.

Sub Readtextlinesfromfile ()
Dim file as New System.IO.StreamReader ("C:test.txt")
Dim Oneline as String
Oneline = file. ReadLine ()
while (Oneline <> "")
Console.WriteLine (Oneline)
Oneline = file. ReadLine ()
End While
File. Close ()
End Sub
File encoding
By default, the StreamReader and StreamWriter classes all use UTF-8 encoding. UTF-8 encoding correctly handles Unicode characters and ensures consistency between localized versions of the operating system.

You can use StreamReader to automatically detect the encoding of a file, or to specify the encoding of a file as a parameter on a constructor.

StreamWriter takes an encoding parameter on its constructor. If the encoding is specified, Visual Basic writes to the file to indicate the encoding being used.