Matrix.AddRow "eats" rows

Question

Hello
I'm trying to do sorting on matrix object. I'm almost there but there is small problem. Here is the code
                for (int i = 0; i < dbDataSource.Size; i++)
                    dbDataSource.Offset = sortedList<i>.Idx;
                    matrix.AddRow(1, ++i);
every time I fire double click event (which contains sorting code) my matrix will show less and less items until it becomes blank.
If it helps somehow I'm posting code which I use for actual sorting.
            if (pVal.ColUID == "col_dost")
                matrix.Clear();
                List<Dostawca> dostawcy = new List<Dostawca>();
                DBDataSource dbDataSource = form.DataSources.DBDataSources.Item("@CT_PRP1");
                int count = dostawcy.Count;
                int k = 0;
                for (int i = 0; i < dbDataSource.Size; i++)
                    string sValue = dbDataSource.GetValue("U_CardName", i);
                    Dostawca dostawca = new Dostawca();
                    dostawca.Nazwa = sValue;
                    dostawca.Idx = k;
                    dostawcy.Add(dostawca);
                    k++;
                var sortedList = dostawcy.OrderBy(x => x.Nazwa).ToList();
                for (int i = 0; i < dbDataSource.Size; i++)
                    dbDataSource.Offset = sortedList<i>.Idx;
                    matrix.AddRow(1, ++i);
and here is my "Dostawca" class
    public class Dostawca
        private string _nazwa;
        private int _id;
        public Dostawca() { }
        public string Nazwa
            get
                return _nazwa;
            set
                _nazwa = value;
        public int Idx
            get
                return _id;
            set
                _id = value;
Thanks
Kamil

Answer 1

Ok, never mind. I see the problem.