GDI+的应用
在VS中創建窗體
(1)CDI+清除繪畫面
在窗體中寫入代碼:
protected override void OnPaint(PaintEventArgs e){
Graphics g=e.Graphics;
g.Clear(Color.Pink);
g.Dispose();
}
(2)CGD+繪制多邊形
protected override void OnPaint(PaintEventArgs e){
Graphics g=e.Graphics;
Point[] points=new Point[]{
new Point(200,200),
new Point(230,230),
new Point(260,300),
new Point(300,350)
};
g.DrawPolygon(new Pen(Color.Red),point);
g.Dispose();
}
(3)GDI+填充顏色
protected override void OnPaint(PaintEventArgs e){
//簡單填充顏色
Graphics g=e.Graphics;
g.FillRectangle(Brushes.Red,new Rectangle(20,20,100,200));
//漸變顏色填充
Brush brush=new LinearGradientBrush(new Point(10,10),new Point(10,10),Color.Yellow,Color.White);
?g.FillRectangle(brush,new Rectangle(20,20,100,170));
g.Dispose();
}
(4)GDI+繪畫路徑
protected override void OnPaint(PaintEventArgs e){
Graphics g = e.Graphics;
?????? ? ?? Point[] points = new Point[]{
??????? ? ?????? new Point(100,100),
??????? ? ?????? new Point(100,150),
?????? ? ????? new Point(150,200),
????? ? ????? new Point(50,200),
?????? ? ?? };
GraphicsPath path = new GraphicsPath(
points,new byte[]{
(byte)PathPointType.Start,
(byte)PathPointType.Line,
(byte)PathPointType.Line,
(byte)PathPointType.Line
);
}
g.DrawPath(new Pen(Color.Red),path);
g.Dispose();
}
(4)GDI+繪制字符串
protected override void OnPaint(PaintEventArgs e){
Graphics g = e.Graphics;
//普通繪制字符串
Font font1=new System.Drawing.Font("宋體",30);
g.DrawingString("ABCD",font1,Brushes.Red,new PointF(30,30));
//帶格式的字符串
?????? Font font2 = new System.Drawing.Font("宋體", 30);
??????????? RectangleF rect = new RectangleF(100,100,100,200);
??????????? g.DrawRectangle(new Pen(Color.Red),new Rectangle(100,100,100,200));
??????????? //字符串格式對象
??????????? StringFormat sf = new StringFormat();
??????????? sf.Alignment = StringAlignment.Center;//在矩形中居中
??????????? sf.LineAlignment = StringAlignment.Center;
??????????? g.DrawString("abcd",font2,Brushes.Red,rect,sf);
??????????? g.Dispose();
}
(5)GDI+紋理繪畫圖片
?protected override void OnPaint(PaintEventArgs e)
??????? {
??????????? Graphics g = e.Graphics;
??????????? Image image = Image.FromFile("圖片路徑");
??????????? //紋理畫筆
??????????? Brush brush = new TextureBrush(image);//刷出來的位置都有image的存在
??????????? g.DrawRectangle(new Pen(Color.Pink),40,40,300,300);
??????????? g.FillRectangle(brush,new Rectangle(40,40,300,300));
??????????? g.Dispose();
??????? }
轉載于:https://www.cnblogs.com/ss977/p/3942428.html
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