The listview column in C automatically adapts to the perfect effect of scaling

I searched many ways on the Internet , Include width=-1、-2, The effect is not ideal . I found a way ：

1： When the design , First, roughly adjust the size of each column ;

2： Write down the columns at startup width Proportion .

public class colSizes : List<double> { };
public colSizes[] grdSizes = new colSizes[3];
public DateTime dBegin = DateTime.Today;


loadSizes(grd_ing, ref grdSizes[0]);
loadSizes(grd_hege, ref grdSizes[1]);
loadSizes(grd_buhege, ref grdSizes[2]);



///
        private void loadSizes(ListView grd, ref colSizes cs)
        {   // Remember proportion 
            if (cs == null) cs = new colSizes();
            cs.Clear();
            double nAll = 0;
            foreach (ColumnHeader itm in grd.Columns) nAll += itm.Width;
            foreach (ColumnHeader itm in grd.Columns) cs.Add(itm.Width / nAll);
        }

3：resize Reset the of each column in proportion width.

private void setAutoSize(ListView grd, colSizes cs)
        {   // Auto fit width ,-1 Set the width according to the content ,-2 Set the width according to the title 
            if (cs == null) return;
            for (int i = 0; i < Math.Min(cs.Count, grd.Columns.Count); i++)
                grd.Columns[i].Width = (int)Math.Round(grd.ClientSize.Width * cs[i], 0);
        }

private void FrmView_Resize(object sender, EventArgs e)
        {
            setAutoSize(grd_ing, grdSizes[0]);
            setAutoSize(grd_hege, grdSizes[1]);
            setAutoSize(grd_buhege, grdSizes[2]);
        }

The effect is perfect , To scale