C# winform GDI 绘图总结【详细】

喜欢ヅ旅行 2024-03-27 10:43 63阅读 0赞

### C\# winform GDI 绘图–矩形，圆，多边形，直线虚线，文字，图形填充，饼状图等 ###

![在这里插入图片描述][4457c938dbb54580b23a615f4fd1c3d4.png]  
**代码如下：**

private void Drawing_Paint(object sender, PaintEventArgs e)
            {
        
                Graphics g1 = e.Graphics;
    
                //使绘图质量最高，即消除锯齿
                g1.SmoothingMode = SmoothingMode.AntiAlias;
                g1.InterpolationMode = InterpolationMode.HighQualityBicubic;
                g1.CompositingQuality = CompositingQuality.HighQuality;
    
                Pen p = new Pen(Color.Blue, 2);//定义笔的颜色为蓝色，大小为2
                Brush fillBrush = new SolidBrush(Color.Red);
    
                //画直线
                g1.DrawLine(p, 200, 10, 300, 10);//在画板上画直线,起始坐标为(10,10),终点坐标为(100,100)
    
                //画虚线
                Pen px = new Pen(Color.Blue, 2);//定义笔的颜色为蓝色，大小为2
                px.DashStyle = DashStyle.Dot;//定义虚线的样式为点
                g1.DrawLine(px, 200, 20, 300, 20);
    
                //自定义虚线
                Pen pd = new Pen(Color.Black, 5);//定义笔的颜色为蓝色，大小为2
                pd.DashPattern = new float[] {
         2, 1 };//设置短划线和空白部分的数组
                g1.DrawLine(pd, 200, 30, 300, 30);
    
                //画箭头,只对不封闭曲线有用
                pd.DashStyle = DashStyle.Solid;//恢复实线
                pd.EndCap = LineCap.ArrowAnchor;//定义线尾的样式为箭头
                g1.DrawLine(pd, 200, 50, 300, 50);
    
                //画圆
                g1.DrawEllipse(p, 200, 80, 280, 280);//与椭圆相贴的矩形的坐标，椭圆的长轴，椭圆的短轴
                //单色填充圆
                g1.FillEllipse(fillBrush, 200, 80, 280, 280);
    
                //画矩形
                Pen p2 = new Pen(Color.Yellow, 4);
                g1.DrawRectangle(p2, 0, 310, 100, 100);
    
                //用渐变色填充
                Rectangle rect = new Rectangle(300, 60, 50, 50);//定义矩形,参数为起点横纵坐标以及其长和宽
                rect.Location = new Point(330, 20);
                LinearGradientBrush b3 = new LinearGradientBrush(rect, Color.Yellow, Color.Black, LinearGradientMode.Horizontal);
                g1.FillRectangle(b3, rect);
    
                //用图片填充
                //TextureBrush b2 = new TextureBrush(Image.FromFile(@"e:\picture\1.jpg"));
                //rect.Location = new Point(10, 70);//更改这个矩形的起点坐标
                //rect.Width = 200;//更改这个矩形的宽来
                //rect.Height = 200;//更改这个矩形的高
                //g1.FillRectangle(b2, rect);
    
                //绘制字符串
                g1.DrawString("绘制文字", new Font("微软雅黑", 10), fillBrush, new PointF(130, 10));
    
                //画多边形
                Point[] pg = {
         new Point(0, 76),
                    new Point(80, 76),
                    new Point(106, 0),
                    new Point(130, 76),
                    new Point(210, 76),
                    new Point(146, 124),
                    new Point(170, 200),
                    new Point(106, 152),
                    new Point(40, 200),
                    new Point(66, 124),
                };
                g1.DrawPolygon(p, pg);
    
                //画三维饼状图
                int width = 200;
                int height = 100;
                int x = 440;
                int y = 20;
                Rectangle r = new Rectangle(x, y, width, height);
                Pen p3 = new Pen(Color.Gray);
                for (int i = y; i < 3 * y; i++)
                {
        
                    Rectangle tempR = new Rectangle(x, i, width, height);
                    g1.DrawEllipse(p3, tempR);
    
                }
                Brush b = new SolidBrush(Color.Gainsboro);
                g1.FillPie(b, r, 0, 360);//笔刷，基础矩形，扫过的角
                b = new SolidBrush(Color.Blue);
                g1.FillPie(b, r, 60, 150);
                b = new SolidBrush(Color.Yellow);
                g1.FillPie(b, r, 210, 150);//从210°开始掠过150度
    
                Bitmap image = new Bitmap(500, 500);
                Graphics g = Graphics.FromImage(image);
                g.DrawEllipse(p, 200, 90, 100, 100);//与椭圆相贴的矩形的坐标，椭圆的长轴，椭圆的短轴
                //单色填充圆
                g.FillEllipse(fillBrush, 200, 90, 100, 100);
                image.Save(@"c:\1.jpg");
                #region 显示
                //pictureBox1.Image = (Image)image;
                //pictureBox1.Image.Save(@"c:\1.jpg");
                //pictureBox1.Show();
                
                #endregion
                g1.Dispose();//释放由Graphics使用的资源
                p.Dispose();
            }

[4457c938dbb54580b23a615f4fd1c3d4.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/3aaa58d1feae4607a87f00599787d544.png