C# GDI+ 绘制线段（实线或虚线）、矩形、字符串、圆、椭圆

Graphics graphics = e.Graphics;
//绘制实线
using (Pen pen = new Pen(Color.Black, 2))
{
pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Solid; //实线
graphics.DrawLine(pen,0,10,100,10);
}
//画出虚线
using (Pen pen = new Pen(Color.Black, 2))
{
pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash; //虚线
graphics.DrawLine(pen, 0, 15, 100, 15);
}
//画出矩形
using (Pen pen = new Pen(Color.Black, 2))
{
Rectangle rectangle = new Rectangle(2,30,100,50);
graphics.DrawRectangle(pen,rectangle);
}
//绘制字符串
string str = "http://61office.cn/";
graphics.DrawString(str, this.Font, Brushes.Black, 2, 100);

//测量字符串的高度和宽度
SizeF szfTitle = graphics.MeasureString(str, this.Font);
graphics.DrawString(str, this.Font, Brushes.Black, 2, 200-(int)szfTitle.Height);
graphics.DrawString("该字符串高度："+szfTitle.Height+" 字符串宽度："+szfTitle.Width, this.Font, Brushes.Black, 2, 200);

//绘制圆
using(Pen pen = new Pen(Color.Black,2))
{
//圆
graphics.DrawEllipse(pen,2,230,100,100); //在画板上画椭圆,起始坐标为(10,10),外接矩形的宽为100,高为100 此时就是一个圆
//椭圆
graphics.DrawEllipse(pen, 2, 400, 100, 50); //在画板上画椭圆,起始坐标为(10,10),外接矩形的宽为100,高为50 此时就是一个椭圆
}
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C# GDI+ 绘制线段（实线或虚线）、矩形、字符串、圆、椭圆
https://blog.51cto.com/usdoc/3244135