mchSamples-MAUI/ch03_DataBinding/ex_BindingToA2dArray_context/Matrix2d.cs

namespace ex_BindingToA2dArray_context;

public class Matrix2d
{
    private static Random random = new Random();

    private static int[,] RandomInit(int nbRows, int nbColumns)
    {
        int[,] mat = new int[6,7];
		for(int i=0; i<6; i++)
		{
			for(int j=0; j<7; j++)
			{
				mat[i,j] = random.Next(101);
			}
		};
        return mat;
    }

    public Matrix2d(int nbRows, int nbColumns)
    {
        matrix = RandomInit(nbRows, nbColumns);
    }

    private readonly int[,]? matrix;

	public int NbRows => matrix?.GetLength(0) ?? 0;
    public int NbColumns => matrix?.GetLength(1) ?? 0;

    public int[,] Matrix 
    {
        get
        {
            if(matrix == null) return new int[,]{{}};

            int[,] mat = new int[NbRows, NbColumns];
            for(int numRow=0; numRow<NbRows; numRow++)
            {
                for(int numCol=0; numCol<NbColumns; numCol++)
                {
                    mat[numRow, numCol] = matrix[numRow, numCol];
                }
            }
            return matrix;
        }
    }

    public IEnumerable<int> FlatMatrix2d
    {
        get
        {
            List<int> flatMatrix = new();

            if(matrix == null) return flatMatrix;

            int[,] mat = new int[NbRows, NbColumns];
            for(int numRow=0; numRow<NbRows; numRow++)
            {
                for(int numCol=0; numCol<NbColumns; numCol++)
                {
                    flatMatrix.Add(matrix[numRow, numCol]);
                }
            }
            return flatMatrix;
        }
    }
}