我在
Windows窗体上绘制一条控件,如下所示：
// Get Graphics object from chart
Graphics graph = e.ChartGraphics.Graphics;
PointF point1 = PointF.Empty;
PointF point2 = PointF.Empty;
// Set Maximum and minimum points
point1.X = -110;
point1.Y = -110;
point2.X = 122;
point2.Y = 122;
// Convert relative coordinates to absolute coordinates.
point1 = e.ChartGraphics.GetAbsolutePoint(point1);
point2 = e.ChartGraphics.GetAbsolutePoint(point2);
// Draw connection line
graph.DrawLine(new Pen(Color.Yellow,3),point1,point2);
我想知道是否可以画一条虚线(虚线)而不是一条常规的实线？
解决方法
一旦您定义了破折号的
figure out the formatting,这很简单：
float[] dashValues = { 5,2,15,4 };
Pen blackPen = new Pen(Color.Black,5);
blackPen.DashPattern = dashValues;
e.Graphics.DrawLine(blackPen,new Point(5,5),new Point(405,5));
浮点数组中的数字表示不同颜色的短划线长度.所以,对于一个2像素(黑色)的简单破折号,每个两个,你的aray将看起来像：{2,2}然后重复模式.如果您想要5幅宽度为2像素的虚线,则可以使用{5,2}
在你的代码中,它将如下所示：
// Get Graphics object from chart
Graphics graph = e.ChartGraphics.Graphics;
PointF point1 = PointF.Empty;
PointF point2 = PointF.Empty;
// Set Maximum and minimum points
point1.X = -110;
point1.Y = -110;
point2.X = 122;
point2.Y = 122;
// Convert relative coordinates to absolute coordinates.
point1 = e.ChartGraphics.GetAbsolutePoint(point1);
point2 = e.ChartGraphics.GetAbsolutePoint(point2);
// Draw (dashed) connection line
float[] dashValues = { 4,2 };
Pen dashPen= new Pen(Color.Yellow,3);
dashPen.DashPattern = dashValues;
graph.DrawLine(dashPen,point2);
