Initializes a new instance of the
StreamReader class for the specified stream.
Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)
Visual Basic (Declaration)
Public Sub New ( _
stream As Stream _
)
Dim stream As Stream
Dim instance As New StreamReader(stream)
public StreamReader (
Stream stream
)
public:
StreamReader (
Stream^ stream
)
public StreamReader (
Stream stream
)
public function StreamReader (
stream : Stream
)
Parameters
- stream
The stream to be read.
This constructor initializes the encoding to UTF8Encoding, the BaseStream property using the stream parameter, and the internal buffer to the default size.
.gif) Caution |
|---|
| When you compile a set of characters with a particular cultural setting and retrieve those same characters with a different cultural setting, the characters might not be interpretable, and could cause an exception to be thrown. |
For an example of using this method, see the Example section. The following table lists examples of other typical or related I/O tasks.
The following code example demonstrates this StreamReader constructor.
Imports System
Imports System.IO
Public Class Test
Public Shared Sub Main()
Dim path As String = "c:\temp\MyTest.txt"
Try
If File.Exists(path) Then
File.Delete(path)
End If
Dim sw As StreamWriter = New StreamWriter(path)
sw.WriteLine("This")
sw.WriteLine("is some text")
sw.WriteLine("to test")
sw.WriteLine("Reading")
sw.Close()
Dim fs As FileStream = New FileStream(path, FileMode.Open)
Dim sr As StreamReader = New StreamReader(fs)
Do While sr.Peek() >= 0
Console.WriteLine(sr.ReadLine())
Loop
sr.Close()
fs.Close()
Catch e As Exception
Console.WriteLine("The process failed: {0}", e.ToString())
End Try
End Sub
End Class
using System;
using System.IO;
class Test
{
public static void Main()
{
string path = @"c:\temp\MyTest.txt";
try
{
if (File.Exists(path))
{
File.Delete(path);
}
using (StreamWriter sw = new StreamWriter(path))
{
sw.WriteLine("This");
sw.WriteLine("is some text");
sw.WriteLine("to test");
sw.WriteLine("Reading");
}
using (FileStream fs = new FileStream(path, FileMode.Open))
{
using (StreamReader sr = new StreamReader(fs))
{
while (sr.Peek() >= 0)
{
Console.WriteLine(sr.ReadLine());
}
}
}
}
catch (Exception e)
{
Console.WriteLine("The process failed: {0}", e.ToString());
}
}
}
using namespace System;
using namespace System::IO;
int main()
{
String^ path = "c:\\temp\\MyTest.txt";
try
{
if ( File::Exists( path ) )
{
File::Delete( path );
}
StreamWriter^ sw = gcnew StreamWriter( path );
try
{
sw->WriteLine( "This" );
sw->WriteLine( "is some text" );
sw->WriteLine( "to test" );
sw->WriteLine( "Reading" );
}
finally
{
delete sw;
}
FileStream^ fs = gcnew FileStream( path,FileMode::Open );
try
{
StreamReader^ sr = gcnew StreamReader( fs );
try
{
while ( sr->Peek() >= 0 )
{
Console::WriteLine( sr->ReadLine() );
}
}
finally
{
delete sr;
}
}
finally
{
delete fs;
}
}
catch ( Exception^ e )
{
Console::WriteLine( "The process failed: {0}", e );
}
}
import System.*;
import System.IO.*;
class Test
{
public static void main(String[] args)
{
String path = "c:\\temp\\MyTest.txt";
try {
if (File.Exists(path)) {
File.Delete(path);
}
StreamWriter sw = new StreamWriter(path);
try {
sw.WriteLine("This");
sw.WriteLine("is some text");
sw.WriteLine("to test");
sw.WriteLine("Reading");
}
finally {
sw.Dispose();
}
FileStream fs = new FileStream(path, FileMode.Open);
try {
StreamReader sr = new StreamReader(fs);
try {
while (sr.Peek() >= 0) {
Console.WriteLine(sr.ReadLine());
}
}
finally {
sr.Dispose();
}
}
finally {
fs.Dispose();
}
}
catch (System.Exception e) {
Console.WriteLine("The process failed: {0}", e.ToString());
}
} //main
} //Test
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
.NET Framework
Supported in: 2.0, 1.1, 1.0
.NET Compact Framework
Supported in: 2.0, 1.0