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StreamReader.StreamReader(Stream) Constructor

Initializes a new instance of the StreamReader class for the specified stream.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)

public StreamReader (
	Stream stream
)
public StreamReader (
	Stream stream
)
public function StreamReader (
	stream : Stream
)
Not applicable.

Parameters

stream

The stream to be read.

Exception typeCondition

ArgumentException

stream does not support reading.

ArgumentNullException

stream is a null reference (Nothing in Visual Basic).

This constructor initializes the encoding to UTF8Encoding, the BaseStream property using the stream parameter, and the internal buffer to the default size.

Caution noteCaution:

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 a list of common I/O tasks, see Common I/O Tasks.

The following code example demonstrates this StreamReader constructor.

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());
        }
    }
}

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 Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

XNA Framework

Supported in: 1.0
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