C# 用渐变色画一条线
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Drawing a line with a gradient color
提问by TK.
Is it possible to draw a line using a graduated colour?
是否可以使用渐变色绘制线条？
I want to be able to draw a straight or a curved line (if possible) where at one end of the line is Blue and the other end is Red.
我希望能够画一条直线或曲线（如果可能的话），线的一端是蓝色，另一端是红色。
Further There might be a need to have more than one gradient per-line e.g the colour going from Blue -> Green -> Red. I am thinking that this might just consist of multiple gradient lines drawn together.
此外，每行可能需要有多个渐变，例如颜色从蓝色 -> 绿色 -> 红色。我认为这可能只是由绘制在一起的多条渐变线组成。
采纳答案by Mitch Wheat
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
Graphics graphicsObject = e.Graphics;
using (Brush aGradientBrush = new LinearGradientBrush(new Point(0, 0), new Point(50, 0), Color.Blue, Color.Red))
{
using (Pen aGradientPen = new Pen(aGradientBrush))
{
graphicsObject.DrawLine(aGradientPen, new Point(0, 10), new Point(100, 10));
}
}
}
回答by lubos hasko
you will need to use System.Drawing.Drawing2D.LinearGradientBrushinstead of System.Drawing.SolidBrush
你将需要使用System.Drawing.Drawing2D.LinearGradientBrush而不是System.Drawing.SolidBrush
example:
例子：
e.Graphics.DrawLine(new Pen(new System.Drawing.Drawing2D.LinearGradientBrush(...
