Question

Right now I create following arrays (on Button_click event):

string[,] Butt = new string[2, 3] { 
                 { "120", "200", "#ffc90e" },
                 { "380", "200", "#22b14c" } 
               };

int[,] arrat = new int[,] {
                    { 199, 199 },
                   { 257, 189 },
                   { 407, 185 },
                   { 521, 196 },
                   { 608, 232 },
                   { 620, 300 },
                   { 509, 338 },
                   { 386, 344 },
                   { 288, 347 }
                  };

I want to optimize my code so I don’t have to crete new arrays each time. Better solution will be – to load arrays from file on program launch

lets say I have a CSV file with following content:

199, 199

257, 189

407, 185

521, 196

how do I load everything into an array: “int[,] array = new int[,]” ??

Answer 1

You should put some error checking but you may start from:

private static string[,] Parse(string path, int columnCount, char columnSeparator = ',')
{
 string[] lines = File.ReadAllLines(path);

 string[,] result = new string[lines.Length, columnCount];
 for (int rowIndex = 0; rowIndex < lines.Length; ++rowIndex)
 {
  string[] columns = lines[rowIndex].Split(new char[] { columnSeparator }, columnCount);

  for (int columnIndex = 0; columnIndex < columns.Length; ++columnIndex)
   result[rowIndex, columnIndex] = columns[columnIndex];
 }

 return result;
}

Helper method for conversion (instead you may want to embed in the Parse() method):

private int[,] ConvertToInt(string[,] matrix)
{
 int[,] result = new int[matrix.GetLength(0), matrix.GetLength(1)];
 for (int i = 0; i < result.GetLength(0); ++i)
 {
  for (int j = 0; j < result.GetLength(1); ++j)
  {
   int value = 0;
   if (Int32.TryParse(matrix[i, j], System.Globalization.NumberStyles.Integer, CultureInfo.InvariantCulture, out value))
    result[i, j] = value;
  }
 }

 return result;
}

(I’m not using LINQ ’cause I guess you should put a lot of error checking inside that methods to validate input data).