Question

C#怎么填充颜色？

我在C#的窗体中画了一个三角形，怎么给它填充颜色呢？
Point[] points = new Point[3];
//A
points[0].X = (int)(a * (1 + Math.Sin(18 * pi / 180) - Math.Cos(36 * pi / 180)));
points[0].Y = 0;
//1
points[1].X = (int)(a * (1 + Math.Sin(18 * pi / 180)));
points[1].Y = (int)(((a * (Math.Cos(36 * pi / 180) + Math.Sin(18 * pi / 180) + 1)) - (a * (1 + Math.Sin(18 * pi / 180) - Math.Cos(36 * pi / 180)))) / 2 * Math.Tan(36 * pi / 180));
//2
points[2].X = (int)(a * Math.Cos(72 * pi / 180) + a * (1 + Math.Sin(18 * pi / 180) - Math.Cos(36 * pi / 180)));
points[2].Y = (int)(a * Math.Sin(72 * pi / 180));
Graphics g1 = this.CreateGraphics();
Brush t = new SolidBrush(Color.Blue);
GraphicsPath gp = new GraphicsPath();
gp.AddLines(points);
g1.FillPath(t, gp);
这是我最终用的方法，先找到三角形的每个点的坐标，再填充。
三楼的朋友说用backcolor？我好像没找到。是不是我太笨了。

Answer 1

定义一个颜色 和一个刷子
Color color=Color.FromArgb(r,g,b);
Brush brush=new SoildBrush(color)
再将刷子填充那地方就可以了

Answer 2

属性backcolor

Answer 3

for( int x = 0; x < flag.Width; ++x )
{
for( int y = 0; y < flag.Height; ++y )
{
//nowColor = flag.GetPixel(x,y);
myColor = Color.FromArgb(r,g,b);
flag.SetPixel(x, y, myColor);
}
}