C#GDI+ 繪制線段（實線或虛線）、矩形、字符串、圓、橢圓

繪制基本線條和圖形 比較簡單，直接看代碼。

            Graphics graphics = e.Graphics;

            //繪制實線
            using (Pen pen = new Pen(Color.Black, 2))
            {
                pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Solid; //實線
                graphics.DrawLine(pen,0,10,100,10);
            }

            //畫出虛線
            using (Pen pen = new Pen(Color.Black, 2))
            {
                pen.DashStyle = System.Drawing.Drawing2D.DashStyle.Dash; //虛線
                graphics.DrawLine(pen, 0, 15, 100, 15);
            }

            //畫出矩形
            using (Pen pen = new Pen(Color.Black, 2))
            {
                 Rectangle rectangle = new Rectangle(2,30,100,50);
                    graphics.DrawRectangle(pen,rectangle);
            }

            //繪制字符串
            string str = "Hello 笨男孩!";
            graphics.DrawString(str, this.Font, Brushes.Black, 2, 100);

            //測量字符串的高度和寬度
            SizeF szfTitle = graphics.MeasureString(str, this.Font);
            graphics.DrawString(str, this.Font, Brushes.Black, 2, 200-(int)szfTitle.Height);
            graphics.DrawString("該字符串高度："+szfTitle.Height+" 字符串寬度："+szfTitle.Width, this.Font, Brushes.Black, 2, 200);



            //繪制圓
            using(Pen pen = new Pen(Color.Black,2))
            {
                //圓
                graphics.DrawEllipse(pen,2,230,100,100); //在畫板上畫橢圓,起始坐標為(10,10),外接矩形的寬為100,高為100   此時就是一個圓

                //橢圓
                graphics.DrawEllipse(pen, 2, 400, 100, 50); //在畫板上畫橢圓,起始坐標為(10,10),外接矩形的寬為100,高為50   此時就是一個橢圓
            }

繪制效果

源代碼工程文件下載