Question

    public void button2_Click(object sender, EventArgs e)

    {
        char[] delimiters = { ',', '\r', '\n', ' ' };
        string[] content = File.ReadAllText(CSV_File).Split(delimiters);

        int bounds = (content.GetUpperBound(0)); //bounds of this content string is 96
        int i = 1;
        id = new string[(bounds / 4)]; //for example index size = 96 / 4 = 24

        for (i = 0; i <= (bounds / 4); i++)
        {
            int rows = (i * 4); // gets every 4th value
            id[i] = content[rows]; //inserts row 96 into id 24 - fails here
        }
    }

Stuck on this for a while now. The exact error is “Index was outside the bounds of the array”. I do not know to which index this refers however.

Answer 1

Looks like you accidentally wrote <= instead of <. Remember that array indices go up to the length – 1.

I might recommend cleaning up the code a bit. That’s a lot of extra brackets and variables…

var delimeters = new[] { ',', '\r', '\n', ' ' };
var content = File.ReadAllText(CSV_File).Split(delimeters);

id = content.Where((n, i) => i % 4 == 0).ToArray();