C# StreamReader - c# - c# tutorial - c# net




What is StreamReader Class in C# ?

  • The StreamReader class also inherits from the abstract base class TextReader that represents a reader for reading series of characters.
  • learn c# tutorials - stream writer and stream reader - c# programs

    Stream writer and stream reader

  • C# StreamReader class is used to read string from the stream.
  • It inherits TextReader class. It provides Read() and ReadLine() methods to read data from the stream.
 C# StreamReader

C# StreamReader

Important Points about StreamReader Class

  1. Implements a TextReader that reads characters from a byte stream in a particular encoding.
  2. StreamReader class uses UTF-8 Encoding by defaults.
  3. StreamReader class is designed for character input in a particular encoding.
  4. Use this class for reading standard text file.
  5. By default, it is not thread safe.
  • The following table shows some members of the StreamReader class.
Member Description
Close() Closes the current StreamReader object and the underlying stream. This method is equivalent to Dispose(), that is used to release resources.
Read() Reads the next character from the input stream.
ReadLine() Reads a line of characters from the current stream and returns the data as a string.
ReadToEnd() Reads the stream from the current position to the end of the stream.

C# StreamReader example to read one line:

  • Let's see the simple example of StreamReader class that reads a single line of data from the file.
using System;  
using System.IO;  
public class StreamReaderExample  
{  
    public static void Main(string[] args)  
    {  
        FileStream f = new FileStream("e:\\output.txt", FileMode.OpenOrCreate);  
        StreamReader s = new StreamReader(f);  
  
        string line=s.ReadLine();  
        Console.WriteLine(line);  
  
        s.Close();  
        f.Close();  
   }  
} 

C# examples - Output :

Hello C#
learn c# tutorials - stream writer and stream reader - c# programs

stream writer and stream reader

C# StreamReader example to read all lines:

using System;  
using System.IO;  
public class StreamReaderExample  
{  
    public static void Main(string[] args)  
    {  
        FileStream f = new FileStream("e:\\a.txt", FileMode.OpenOrCreate);  
        StreamReader s = new StreamReader(f);  
  
        string line = "";  
        while ((line = s.ReadLine()) != null)  
        {  
            Console.WriteLine(line);  
        }  
        s.Close();  
        f.Close();  
    } 

C# examples - Output :

Hello C#
this is file handling

Related Searches to C# StreamReader

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