System.Windows.Media.Brushes.Purple到十六进制转换

Question

我想将Color转换为十六进制（如＃FFDA2366）。 我知道，有很多像我这样的话题，但像

这样的解决方案

Color color = (Color)ColorConverter.ConvertFromString(paint);

或rect.Fill = (Brush)(new BrushConverter()).ConvertFromString(paint); 不工作。 有什么想法吗？

我在类选择这样的单独文件中有 Rect 类。在主文件中，我创建了静态变量 paint - 现在。

class Rect
{
    public int Width { get; set; }
    public int Height { get; set; }
    public int Left { get; set; }
    public int Top { get; set; }
    public System.Windows.Media.Brush Color { get; set; }

}


 class choose
{
    public void rectangle(int x, int y, int w, int h,string paint,  Canvas canvas)
    {
      // var converter = new System.Windows.Media.BrushConverter();
       //var brush = (Brush)converter.ConvertFromString("#FFFFFF90");


        List<Rect> rects = new List<Rect>();
        rects.Add(new Rect()
        {
            Width = x,
            Height = y,
            Left = w,
            Top = h,
            Color = System.Windows.Media.Brushes.Purple // instead of Purple I want to be a variable paint
        });
        foreach (Rect rect in rects)
        {
            System.Windows.Shapes.Rectangle r = new System.Windows.Shapes.Rectangle();
            r.Width = rect.Width;
            r.Height = rect.Width;
            r.Fill = rect.Color;
            Canvas.SetLeft(r, rect.Left);
            Canvas.SetTop(r, rect.Top);


            canvas.Children.Add(r);

        }

    }
}
private void rectangle_Click(object sender, RoutedEventArgs e)
    {
        choose r1 = new choose();
        string paint = "#FFA669D1";

        int x = int.Parse(beginx.Text);
        int y = int.Parse(beginy.Text);
        int w = int.Parse(wid.Text);
        int h = int.Parse(hei.Text);

        if (!((x > canvas.ActualWidth) || (y > canvas.ActualHeight) || (w > canvas.ActualWidth) ||(h > canvas.ActualHeight)))
        {
            r1.rectangle(x, y, w, h, paint, canvas);
        }
        else
        {
            System.Windows.MessageBox.Show("err");
        }


    }