FileSystem.OpenTextFileReader Method
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Opens a StreamReader object to read from a file.
| OpenTextFileReader(String) |
Opens a StreamReader object to read from a file. |
| OpenTextFileReader(String, Encoding) |
Opens a StreamReader object to read from a file. |
- Source:
- FileSystem.vb
- Source:
- FileSystem.vb
- Source:
- FileSystem.vb
Opens a StreamReader object to read from a file.
public:
static System::IO::StreamReader ^ OpenTextFileReader(System::String ^ file);public static System.IO.StreamReader OpenTextFileReader(string file);static member OpenTextFileReader : string -> System.IO.StreamReaderPublic Shared Function OpenTextFileReader (file As String) As StreamReaderParameters
- file
- String
File to be read.
Returns
StreamReader object to read from the file.
Exceptions
The file name ends with a backslash (\).
The specified file cannot be found.
The user lacks necessary permissions to read from the file.
Examples
This example opens the file Testfile.txt, reads a line from it, and displays the line in a MessageBox.
Dim fileReader =
My.Computer.FileSystem.OpenTextFileReader("C:\testfile.txt")
Dim stringReader = fileReader.ReadLine()
MsgBox("The first line of the file is " & stringReader)
Remarks
Only text files can be read with a StreamReader.
The following table lists an example of a task involving the My.Computer.FileSystem.OpenTextFileReader method.
| To | See |
|---|---|
| Open a file with a StreamReader | How to: Read Text from Files with a StreamReader (Visual Basic) |
See also
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
- Source:
- FileSystem.vb
- Source:
- FileSystem.vb
- Source:
- FileSystem.vb
Opens a StreamReader object to read from a file.
public:
static System::IO::StreamReader ^ OpenTextFileReader(System::String ^ file, System::Text::Encoding ^ encoding);public static System.IO.StreamReader OpenTextFileReader(string file, System.Text.Encoding encoding);static member OpenTextFileReader : string * System.Text.Encoding -> System.IO.StreamReaderPublic Shared Function OpenTextFileReader (file As String, encoding As Encoding) As StreamReaderParameters
- file
- String
File to be read.
- encoding
- Encoding
The encoding to use for the file contents. Default is ASCII.
Returns
StreamReader object to read from the file.
Exceptions
The file name ends with a backslash (\).
The specified file cannot be found.
The user lacks necessary permissions to read from the file.
Examples
This example opens the file Testfile.txt, reads a line from it, and displays the line in a MessageBox.
Dim fileReader =
My.Computer.FileSystem.OpenTextFileReader("C:\testfile.txt")
Dim stringReader = fileReader.ReadLine()
MsgBox("The first line of the file is " & stringReader)
Remarks
Only text files can be read with a StreamReader.
The following table lists an example of a task involving the My.Computer.FileSystem.OpenTextFileReader method.
| To | See |
|---|---|
| Open a file with a StreamReader | How to: Read Text from Files with a StreamReader (Visual Basic) |
See also
Applies to
.NET 10 and other versions
| Product | Versions |
|---|---|
| .NET | Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET feedback
.NET is an open source project. Select a link to provide feedback: