List values are not being stored

Question

Can someone please tell me what I'm missing, the class reads values from a text file and should store them for other use, I can see the values with Console.Write(eachCell[0]) but I can't save the values. I've tried using string[] and List<string> but no luck. It should store the values being read to a list or array but so far it is not. Nothing shows on the console.

class test
{
    public void tryOut()
    {
        #region file.read
        try
        {
            string fileLocation = @"shelfInfo.txt";
            List<string> cells = File.ReadAllLines(fileLocation).ToList();

            aray(cells);

        }
        catch
        {
            new FileNotFoundException();
        }
        #endregion
    }


    public void aray(List<string> cells)
    {
        string[] t = new string[20];
        string[] k = new string[20];
        string a = "", b = "", c = "", d = "";
        int i = 0;
        foreach (string cell in cells)
        {
            string[] eachCell = cell.Split('@', '\t', '\n');
            a = t[0] = eachCell[0].ToString();  //Consol.Write on eachCell directly shows the right values.
            b = t[1] = eachCell[1].ToString();
            c = t[2] = eachCell[2].ToString();
            d = t[3] = eachCell[3].ToString();
            for (; i < eachCell.Length; i++)
            {
                k[i] = a;  //should store the values from eachCell
            }
        }
        Console.Write(" " + a + " " + b + " " + " " + c + " " + d); //means the value are being receivedbut no stored
    }
}
// contents of text file
//A11[1]@ A12[0]@ A13[1]@ A14[1]@ 
//A21[1]@ A21[1]@ A23[0]@ A24[0]@
//A31[1]@ A32[0]@ A33[1]@ A34[1]@
//A41[1]@ A41[1]@ A43[0]@ A44[0]@ 

I'd also, appreciate any tips on exception handling.

Answer 1

Your program doesn't return anything because you use the following code.

catch { new FileNotFoundException(); }

Console.Write return nothing just because the exception is caught but it doesn't throw a new exception. There is an exception because eachCell doesn't contain 4 elements and you try to access the element. In fact, you don't have to do the try-catch unless you want to handle this exception manually. If the file isn't there, a FileNotFoundException would already be thrown automatically. Change the tryOut method as the following.

public void tryOut()
{
    #region file.read
    var fileLocation = @"Path";
    aray(File.ReadAllLines(fileLocation).ToList());
    #endregion
}

public static void aray(List<string> cells)
{
    List<string> t = new List<string>();
    foreach (string cell in cells)
    {
        string[] eachCell = cell.Split('@', '\t');
        foreach (var e in eachCell)
        {
            t.Add(e);
        }
    }
    foreach (var e in t)
    {
        Console.WriteLine(e);
    }
}