using System;
using System.Collections;
using System.Windows.Forms;

namespace DataStreamInterfaceTest
{
    public class LviIDComparer : IComparer
    {
        int column;
        SortOrder order;

        public LviIDComparer()
        {
            column = 0;
            order = SortOrder.Ascending;
        }

        public LviIDComparer(int column, SortOrder order)
        {
            this.column = column;
            this.order = order;
        }

        public int Compare(object x, object y)
        {
            Int64 valX = Int64.Parse(((ListViewItem)x).SubItems[column].Text);
            Int64 valY = Int64.Parse(((ListViewItem)y).SubItems[column].Text);

            if (order == SortOrder.Ascending)
            {
                return valX > valY ? 1 : valX == valY ? 0 : -1;
            }
            else
            {
                return valX < valY ? 1 : valX == valY ? 0 : -1;
            }
        }
    }
}