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My.Computer.FileSystem.OpenTextFileReader Method

Opens a StreamReader.

' Usage
Dim value As System.IO.StreamReader = My.Computer.FileSystem.OpenTextFileReader(file)
Dim value As System.IO.StreamReader = My.Computer.FileSystem.OpenTextFileReader(file ,encoding)
' Declaration
Public Function OpenTextFileReader( _
   ByVal file As String _
) As System.IO.StreamReader
' -or-
Public Function OpenTextFileReader( _
   ByVal file As String, _
   ByVal encoding As System.Text.Encoding _
) As System.IO.StreamReader

file

String. File to be read. Required.

encoding

Encoding. Default is UTF8. Required.

The following conditions may create an exception:

Only text files can be read with a StreamReader.

The following table lists examples of tasks involving the My.Computer.FileSystem.OpenTextFileReader method.

This example opens the file Testfile.txt, reads a line from it, and displays the line in a MessageBox.

Dim fileReader As System.IO.StreamReader
fileReader = _
My.Computer.FileSystem.OpenTextFileReader("C:\\testfile.txt")
Dim stringReader As String
stringReader = fileReader.ReadLine()
MsgBox("The first line of the file is " & stringReader)

Namespace: Microsoft.VisualBasic.MyServices

Class: FileSystemProxy (provides access to FileSystem)

Assembly: Visual Basic Runtime Library (in Microsoft.VisualBasic.dll)

Availability by Project Type

Project type

Available

Windows Application

Yes

Class Library

Yes

Console Application

Yes

Windows Control Library

Yes

Web Control Library

Yes

Windows Service

Yes

Web Site

Yes

The following permission may be necessary:

Permission

Description

FileIOPermission

Controls the ability to access files and folders. Associated enumeration: Unrestricted.

For more information, see Code Access Security and Requesting Permissions.

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