c# - Looking for a way to read and write a text file

Question

I am making a program and I have absolutely no clue how to read and write a text file. I would like it so that I only need one text file that has all kinds of data, so I need to be able to read specific lines of the file.

Answer 1

You can use StreamReader and StreamWriter classes:

StreamReader sr = new StreamReader("C:\\Sample.txt");

var data = sr.ReadLine();


StreamWriter sw = new StreamWriter("C:\\Test.txt");

sw.WriteLine("Hello World!!");

Taken from: http://support.microsoft.com/kb/816149.

EDIT: To clarify, always close the streams. sr.Close() sw.Close(). Or wrap them within a using statement just as James did on his answer.

Answer 2

using (System.IO.StreamReader sr = new System.IO.StreamReader("YourFile.txt"))
{
  String line = sr.ReadLine();
  Console.WriteLine(line);
}

Answer 3

you can also use the File class. string h1 = File.ReadAllText("D:\\TempFiles\\h1.txt"); string h1 = File.WriteAllText("D:\\TempFiles\\h1.txt");