1 // 新建窗体 (.cs)
2 // 重写OnPaint事件
3
4 //1、清除绘画面
5 //protected override void OnPaint(PaintEventArgs e)
6 //{
7 // Graphics g = e.Graphics;//绘制图形的对象
8 // g.Clear(Color.White);
9 // g.Dispose();
10 //}
11
12 //2、绘制线条
13 //protected override void OnPaint(PaintEventArgs e)
14 //{
15 // Graphics g = e.Graphics;//绘制图形的对象
16 // //画一条直线
17 // Pen pen = new Pen(Color.Red);//钢笔绘制对象
18 // Point p1 = new Point(50, 50);
19 // Point p2 = new Point(150, 50);
20 // g.DrawLine(pen, p1, p2);
21 // //画宫格
22 // int y = 100;
23 // for (int i = 0; i < 5; i++)
24 // {
25 // g.DrawLine(new Pen(Color.Black), new Point(100, y), new Point(200, y));
26 // y += 20;
27 // }
28 // int x = 100;
29 // for (int i = 0; i < 5; i++)
30 // {
31 // g.DrawLine(new Pen(Color.Black), new Point(x, 100), new Point(x, 100 + 80));
32 // x += 25;
33 // }
34 // g.Dispose();
35 //}
36
37 //3、绘制图形
38 //protected override void OnPaint(PaintEventArgs e)
39 //{
40 // Graphics g = e.Graphics;//绘制图形的对象
41 // //画矩形
42 // Rectangle rect = new Rectangle(200, 10, 100, 50);
43 // g.DrawRectangle(new Pen(Color.Black), rect);
44 // //画椭圆
45 // g.DrawEllipse(new Pen(Brushes.Black), new Rectangle(50, 50, 100, 50));
46 // //画圆
47 // g.DrawEllipse(new Pen(Brushes.Black), new Rectangle(200, 200, 100, 100));
48 // //画扇形
49 // g.DrawPie(new Pen(Brushes.Black), new Rectangle(10, 200, 100, 100), 0, 45);
50 // //画多边形
51 // Point[] points = new Point[] {
52 // new Point(300,150),
53 // new Point(400,150),
54 // new Point(450,200),
55 // new Point(250,200)
56 // };
57 // g.DrawPolygon(new Pen(Color.Black), points);
58 // g.Dispose();
59 //}
60
61 //4、填充图形
62 //protected override void OnPaint(PaintEventArgs e)
63 //{
64 // Graphics g = e.Graphics;//绘制图形的对象
65 // //简单填充
66 // g.FillRectangle(Brushes.Yellow, new Rectangle(100, 100, 50, 20));
67 // //渐变填充
68 // Brush brush = new LinearGradientBrush(new Point(10, 10), new Point(60, 30), Color.Blue, Color.White);
69 // g.FillRectangle(brush, new Rectangle(10, 10, 50, 20));
70 // g.Dispose();
71 //}
72
73 //5、绘制路径
74 //protected override void OnPaint(PaintEventArgs e)
75 //{
76 // Graphics g = e.Graphics;//绘制图形的对象
77 // Point[] points = new Point[] {
78 // new Point(300,150),
79 // new Point(400,150),
80 // new Point(450,200),
81 // new Point(250,200)
82 // };
83 // GraphicsPath path = new GraphicsPath(
84 // points, new byte[]{
85 // (byte)PathPointType.Start,
86 // (byte)PathPointType.Line,
87 // (byte)PathPointType.Line,
88 // (byte)PathPointType.Line
89 // });
90 // g.DrawPath(new Pen(Color.Black), path);
91 // g.Dispose();
92 //}
93
94 //6、绘制字符串
95 protected override void OnPaint(PaintEventArgs e)
96 {
97 Graphics g = e.Graphics;//绘制图形的对象
98 //普通绘制字符串
99 Font font1 = new System.Drawing.Font("楷体_gb2312", 30);
100 g.DrawString("abc", font1, Brushes.Red, 100, 100);
101 //带格式绘制字符串
102 Font font2 = new System.Drawing.Font("宋体", 30);
103 RectangleF rect = new RectangleF(200, 200, 100, 50);
104 g.DrawRectangle(new Pen(Color.Black), new Rectangle(200, 200, 100, 50));
105 StringFormat sf = new StringFormat();//字符串格式对象
106 sf.LineAlignment = StringAlignment.Center;//设置垂直方向居中
107 sf.Alignment = StringAlignment.Center;//设置水平方向居中
108 g.DrawString("abc", font2, Brushes.Red, rect, sf);
109 g.Dispose();
110 }
111
112 //7、绘制图片
113 //protected override void OnPaint(PaintEventArgs e)
114 //{
115 // Graphics g = e.Graphics;//绘制图形的对象
116 // //普通绘制
117 // Image image = Image.FromFile("images/mouse.png");//获取图片对象
118 // g.DrawImage(image, new Point(50, 50));
119 // g.Dispose();
120 //}
121
122 //8、纹理画笔绘制图片
123 //protected override void OnPaint(PaintEventArgs e)
124 //{
125 // Graphics g = e.Graphics;//绘制图形的对象
126 // Image image = Image.FromFile("images/mouse.png");//获取图片对象
127 // Brush brush = new TextureBrush(image);//纹理画笔
128 // g.DrawEllipse(new Pen(Color.Black), new Rectangle(10, 10, 500, 500));
129 // g.FillEllipse(brush, new Rectangle(10, 10, 500, 500));
130 // g.Dispose();
131 //}
132
133 //9、缓冲画图（先把文本绘制到图像上，完成了所有的绘图操作后，把整个图像绘制到窗口）
134 //protected override void OnPaint(PaintEventArgs e)
135 //{
136 // Image image = new Bitmap(300, 300);//创建画布对象
137 // //将5根线条绘制在image上
138 // Graphics g = Graphics.FromImage(image);//获取image的绘制对象
139 // int x = 10;
140 // for (int i = 0; i < 5; i++)
141 // {
142 // g.DrawLine(new Pen(Color.Black), new Point(10, 10), new Point(x, 100));
143 // x += 20;
144 // }
145 // //将image绘制到窗体中
146 // e.Graphics.DrawImage(image, new Point(100, 100));
147 //}
