C# StreamReader

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.

Read one line

Example

Let's see the simple example of StreamReader class that reads a single line of data from the file.

snippet

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();
    }
}

Output

Hello C#

Read all lines

Example

snippet

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();
    }
}

Output

Hello C# this is file handling