Question

How can I read from a text file, numbers that only consists of one or two characters.
For example:

123 32 40 14124 491 1

I need to get : 32 40 1

What I did atm:

OpenFileDialog ls = new OpenFileDialog();
int numbersFromFile;
if (ls.ShowDialog() == DialogResult.OK)
{
    StreamReader read = new StreamReader(ls.FileName);
}

I’m not sure what to do, I think I need to read all the characters in a string and then to use the substring funcion?

Answer 1

You can use something like:

string lines = File.ReadAllText(ls.FileName);
string[] words = lines.Split(new[] {' ', '\n'}, StringSplitOptions.RemoveEmptyEntries);
string result = String.Join(" ", words.Where(w => w.Length < 3));

// result == "32 40 1" given above input