从C＃中的Brushes集合中选择随机画笔的最佳方法是什么？

Question

从C＃中的System.Drawing.Brushes集合中选择随机画笔的最佳方法是什么？

Answer 1

If you just want a solid brush with a random color, you can try this:

    Random r = new Random();
    int red = r.Next(0, byte.MaxValue + 1);
    int green = r.Next(0, byte.MaxValue + 1);
    int blue = r.Next(0, byte.MaxValue + 1);
    System.Drawing.Brush brush = new System.Drawing.SolidBrush(Color.FromArgb(red, green, blue));

Answer 2

For WPF, use reflection:

var r = new Random();
var properties = typeof(Brushes).GetProperties();
var count = properties.Count();

var colour = properties
            .Select(x => new { Property = x, Index = r.Next(count) })
            .OrderBy(x => x.Index)
            .First();

return (SolidColorBrush)colour.Property.GetValue(colour, null);

Answer 3

I suggest getting a list of enough sample brushes, and randomly selecting from there.

Merely getting a random colour will yield terrible colours, and you could easily set up a list of maybe 50 colours that you could then use every time you need a random one.

Answer 4

一种显而易见的方法是生成一个随机数，然后选择相应的画笔。