Filo I/O

Working with file streams

Using is the same as in Java try-with resources it automatically closes and disposes of the resource.


using(varstream = new FileStream("test.txt", FileMode.Create))
{
 Console.WriteLine(stream.CanRead); // true
 Console.WriteLine(stream.CanWrite); // true
 Console.WriteLine(stream.CanSeek); // true
 stream.WriteByte(201);
 stream.WriteByte(210);
 stream.Position= 0;
 Console.WriteLine(stream.ReadByte());
}

Reading and writing to .txt


using(var writer = new StreamWriter("text.txt"))
{
 writer.WriteLine("First line.");
 writer.WriteLine("Last line.");
}
 
using(var reader = new StreamReader("text.txt"))
{
 Console.WriteLine(reader.ReadLine());
 String line;
    while ((line = streamReader.ReadLine()) != null)
  Console.WriteLine(line)
}

Read all lines, line by line


var lines = File.ReadLines(filename, Encoding.UTF8).ToList();
foreach (var line in lines)
{
    var tokens = line.Split(separator: "\t");
    personList.Add(new Person(tokens[0], tokens[1]));
}