TextReader.Read() not returning correct integer?

Question

So my method should in theory work, I'm just not getting my expected result back.

I have a function that creates a new TextReader class, reads in a character (int) from my text file and adds it too a list.

The textfile data looks like the following (48 x 30):

111111111111111111111111111111111111111111111111 111111111111111111111111111111111111111111111111 111111111111100000000001111111111000000111111111 111111110000000000000000000000000000000011111111 100000000000000000000000000000000000000001111111 000000000000001111111111111111111111000001111111 100000001111111111111111111112211221000001111111 100000111111122112211221122111111111000001111111 111111111221111111111111111112211110000011111111 111112211111111111111111111111111100000111221111 122111111111111122111100000000000000001111111111 111111111111111111100000000000000000011111111111 111111111111111111000000000000000001112211111111 111111111111221110000001111110000111111111111111 111111111111111100000111112211111122111111111111 111111112211110000001122111111221111111111111111 111122111111000000011111111111111111112211221111 111111110000000011111111112211111111111111111111 111111000000001111221111111111221122111100000011 111111000000011111111111000001111111110000000001 111111100000112211111100000000000000000000000001 111111110000111111100000000000000000000000000011 111111111000011100000000000000000000000011111111 111111111100000000000000111111111110001111111111 111111111110000000000011111111111111111111111111 111111111111100000111111111111111111111111111111 111111111111111111111111111111111111111111111111 111111111111111111111111111111111111111111111111 111111111111111111111111111111111111111111111111 111111111111111111111111111111111111111111111111

My method is as follows:

private void LoadReferenceMap(string FileName)
    {
        FileName = Path.Combine(Environment.CurrentDirectory, FileName);
        List<int> ArrayMapValues = new List<int>();

            if (File.Exists(FileName))
            {
                // Create a new stream to write to the file
                using (TextReader reader = File.OpenText(FileName))
                {
                    for (int i = 0; i < 48; i++)
                    {
                        for (int j = 0; j < 30; j++)
                        {
                            int x = reader.Read();

                            if (x == -1)
                                break;

                            ArrayMapValues.Add(x);
                        }
                    }
                }

                level.SetFieldMap(ArrayMapValues);
            }
    }

Returns:

As you can see once it reaches the end of the first line Read() returns 13 and then 10 before moving on to the next row?

Answer 1

A different approach that removes both problems with conversion of chars to integers and the skipping of Environment.NewLine characters

private void LoadReferenceMap(string FileName)
{
    List<int> ArrayMapValues = new List<int>();

    if (File.Exists(FileName))
    {
        foreach(string line in File.ReadLines(FileName))
        {
            var lineMap = line.ToCharArray()
                              .Select(x => Convert.ToInt32(x.ToString()));
            ArrayMapValues.AddRange(lineMap);
        }
        level.SetFieldMap(ArrayMapValues);
    }
}

The file is small, so it seems to be convenient to read a line as a string (this removes the Environment.NewLine), process the line converting it to a char array and applying the conversion to integer for each char. Finally the List of integers of a single line could be added to your List of integers for all the file.

I have not inserted any check on the length of a single line (48 chars) and the total number of lines (30) because you say that every file has this format. However, adding a small check on the total lines loaded and their lengths, should be pretty simple.