Csharp/C Sharp/File Stream/Text File Read Write

Read and Write a Text File

 
using System;
using System.IO;
using System.Text;
public class TextFileTest {
    private static void Main() {
        FileStream fs = new FileStream("test.txt", FileMode.Create);
        StreamWriter w = new StreamWriter(fs, Encoding.UTF8);
        w.WriteLine(1.2M);
        w.WriteLine("string");
        w.WriteLine("!");
        w.Flush();
        w.Close();
        fs.Close();
        fs = new FileStream("test.txt", FileMode.Open);
        StreamReader r = new StreamReader(fs, Encoding.UTF8);
        Console.WriteLine(Decimal.Parse(r.ReadLine()));
        Console.WriteLine(r.ReadLine());
        Console.WriteLine(Char.Parse(r.ReadLine()));
        r.Close();
        fs.Close();
    }
}

Read ASCII string from byte buffer

using System;
using System.Globalization;
using System.Windows.Forms;
using System.Data;
using System.IO;
public class EntryPoint
{
    static void Main( string[] args ) {
        FileStream file = File.OpenRead("test.cs");
        byte[] buffer = new byte[1024];
        
        int c = file.Read(buffer, 0, buffer.Length);
        while (c > 0) 
        {
          Console.WriteLine(System.Text.ASCIIEncoding.ASCII.GetString(buffer));
          c = file.Read(buffer, 0, buffer.Length);
        }
        file.Close();
    }
}

Reads and displays bytes until end-of-file

using System;
using System.IO;
public class ReadBytes {
  public static void Main(string[] args) {
      Stream input = new FileStream("test.cs", FileMode.Open);
      int i;
      while((i = input.ReadByte()) != -1)
        Console.Write(i + " ");
      input.Close();
  }
}

Read text file line by line

 
using System;
using System.IO;
public class ReadWriteApp
{
    public static void Main(string[] args)
    {
        FileStream s = new FileStream("Bar.txt", FileMode.Create);
        StreamWriter w = new StreamWriter(s);
        w.Write("Hello World");
        w.Close();
   
        s = new FileStream("Bar.txt", FileMode.Open);
        StreamReader r = new StreamReader(s);
        string t;
        while ((t = r.ReadLine()) != null)
        {
            Console.WriteLine(t);
        }
        w.Close();
    }
}

Read text file line by line with exception catch

using System;
using System.IO;
class Class1{
      static void Main(string[] args){
         string strLine;
         try
         {
            FileStream aFile = new FileStream("books.xml",FileMode.Open);
            StreamReader sr = new StreamReader(aFile);
            strLine = sr.ReadLine();
            while(strLine != null)
            {
               Console.WriteLine(strLine);
               strLine = sr.ReadLine();
            }
            aFile.Close();
            sr.Close();
         }
         catch(IOException e)
         {
            Console.WriteLine("An IO exception has been thrown!");
            Console.WriteLine(e.ToString());
            return;
         }
         return;
     }
}

Read whole text file to the end

using System;
using System.Data;
using System.IO;

class Class1{
  static void Main(string[] args){      
      StreamReader sr = new StreamReader("practice.txt");
      Console.WriteLine(sr.ReadToEnd()); 
      sr.Close();   
    }
}

Text file Write with format and write boolean value to a text file

using System;
using System.IO;
class Class1{
      static void Main(string[] args){
         try
         {
            FileStream aFile = new FileStream("practice.txt",FileMode.OpenOrCreate);
            StreamWriter sw = new StreamWriter(aFile);
            
            bool truth = true;
            sw.WriteLine("A");
            sw.WriteLine("{0}",System.DateTime.Now.ToShortDateString());
            sw.Write("A");
            sw.Write("www.nfex.ru",truth);
            sw.Close();
         }
         catch(IOException e)
         {
            Console.WriteLine("An IO exception has been thrown!");
            Console.WriteLine(e.ToString());
            Console.ReadLine();
            return;
         }
         return;
      }
}

Write string to a text file

using System;
using System.Data;
using System.IO;

class Class1{
  static void Main(string[] args){      
      StreamWriter sw = new StreamWriter("practice.txt");
        sw.Write("www.nfex.ru");
        sw.Close();
    }
}