C#代码实现矢量画图

    要实现C#代码画矢量图，其基本原理是先创建一个容器作为画板，然后创建Line(直线)、PolyLine(多段线)、Rectangle(矩形)或者Ellipse(椭圆)基本绘图对象生成各种矢量图形，最后把这些图形对象添加到画板中即可，一般用Canvas容器作为画板。下面以在Canvas容器控件中绘制Line(直线)、PolyLine(多段线)、Rectangle(矩形)或者Ellipse(椭圆)等基本图形对矢量绘图进行简单的介绍，希望对大家有所帮助。

    创建一个C#项目，在项目中添加Canvas并把Canvas属性的旋转角度设置为-90度，然后添加绘制各种基本图形的按钮

      绘制坐标系效果图及代码

 private void PaintGrid()//画坐标系 { Line l=new Line(); l.X1=0; l.Y1=10; l.X2=0; l.Y2=this.canvas.Height-10; l.StrokeThickness=1; l.Stroke=new SolidColorBrush(Color.FromRgb(0, 0, 0)); Canvas.SetLeft(l,this.canvas.Width/2); this.canvas.Children.Add(l); l=new Line(); l.X1=10; l.Y1=0; l.X2=this.canvas.Width-10;; l.Y2=0; l.StrokeThickness=1; l.Stroke=new SolidColorBrush(Color.FromRgb(0, 0, 0)); Canvas.SetTop(l,this.canvas.Height/2); this.canvas.Children.Add(l); for(int i=-10;i<=10;i++) { l=new Line(); Line ly=new Line(); l.X1=i*15; l.X2=i*15; ly.Y1=i*15; ly.Y2=i*15; if(i%2==0) { l.Y1=-5; l.Y2=5; ly.X1=-5; ly.X2=5; } else { l.Y1=-10; l.Y2=10; ly.X1=-10; ly.X2=10; } l.StrokeThickness=1; l.Stroke=new SolidColorBrush(Color.FromRgb(0, 0, 0)); Canvas.SetLeft(l,this.canvas.Width/2); Canvas.SetTop(l,this.canvas.Height/2); ly.StrokeThickness=1; ly.Stroke=new SolidColorBrush(Color.FromRgb(0, 0, 0)); Canvas.SetLeft(ly,this.canvas.Width/2); Canvas.SetTop(ly,this.canvas.Height/2); this.canvas.Children.Add(ly); this.canvas.Children.Add(l); } Label lb=new Label(); lb.Content="X"; RotateTransform rotateTransform = new RotateTransform(90);//90度 lb.RenderTransform=rotateTransform; Canvas.SetRight(lb,5); Canvas.SetTop(lb,canvas.Height/2-20); this.canvas.Children.Add(lb); lb=new Label(); lb.Content="Y"; lb.RenderTransform=rotateTransform; Canvas.SetRight(lb,canvas.Width/2-15); Canvas.SetBottom(lb,10); this.canvas.Children.Add(lb); Polyline pl=new Polyline(); pl.Points.Add(new Point(this.canvas.Width/2-20,-5)); pl.Points.Add(new Point(this.canvas.Width/2-10,0)); pl.Points.Add(new Point(this.canvas.Width/2-20,5)); pl.Stroke=new SolidColorBrush(Color.FromRgb(0,0,0)); pl.StrokeThickness=1; Canvas.SetLeft(pl,this.canvas.Width/2); Canvas.SetTop(pl,this.canvas.Height/2); this.canvas.Children.Add(pl); pl=new Polyline(); pl.Points.Add(new Point(-5,this.canvas.Height/2-20)); pl.Points.Add(new Point(0,this.canvas.Height/2-10)); pl.Points.Add(new Point(5,this.canvas.Height/2-20)); pl.Stroke=new SolidColorBrush(Color.FromRgb(0,0,0)); pl.StrokeThickness=1; Canvas.SetLeft(pl,this.canvas.Width/2); Canvas.SetTop(pl,this.canvas.Height/2); this.canvas.Children.Add(pl); }

      绘制直线代码

private void bth_paint_Line(object sender, System.Windows.RoutedEventArgs e)//画直线 { this.canvas.Children.Clear();//清空画板 this.PaintGrid();//画坐标系 Line l=new Line();//直线 l.X1=0; l.Y1=0; l.X2=200; l.Y2=200; l.StrokeThickness=1;//直线宽度 l.Stroke=new SolidColorBrush(Color.FromRgb(0, 0, 255));//直线颜色(蓝色) Canvas.SetLeft(l,this.canvas.Width/2);//X的原点平移到canvas容器中间 Canvas.SetTop(l,this.canvas.Height/2);//Y的原点平移到canvas容器中间 this.canvas.Children.Add(l);//在容器中添加该直线 }

效果图

     画多段线代码

 private void bth_paint_Polyline(object sender, System.Windows.RoutedEventArgs e)//画多段线 { this.canvas.Children.Clear();//清空画板 this.PaintGrid();//画坐标系 Polyline pl=new Polyline(); pl.Points.Add(new Point(0,0)); pl.Points.Add(new Point(50,50)); pl.Points.Add(new Point(0,100)); pl.Points.Add(new Point(50,150)); pl.Stroke=new SolidColorBrush(Color.FromRgb(0,0,255)); pl.StrokeThickness=1; Canvas.SetLeft(pl,this.canvas.Width/2);//X的原点平移到canvas容器中间 Canvas.SetTop(pl,this.canvas.Height/2);//Y的原点平移到canvas容器中间 this.canvas.Children.Add(pl);//在容器中添加该多段线 }

效果图

画矩形代码

 private void bth_paint_Rectangle(object sender, System.Windows.RoutedEventArgs e)//画矩形 { this.canvas.Children.Clear();//清空画板 this.PaintGrid();//画坐标系 Rectangle rect=new Rectangle(); rect.Width=100; rect.Height=200; rect.Stroke=new SolidColorBrush(Color.FromRgb(0,0,255)); rect.StrokeThickness=1; Canvas.SetLeft(rect,this.canvas.Width/2-rect.Width/2); Canvas.SetTop(rect,this.canvas.Height/2-rect.Height/2); this.canvas.Children.Add(rect); }

效果图

画圆代码

 private void bth_paint_Circle(object sender, System.Windows.RoutedEventArgs e)//画圆 { this.canvas.Children.Clear();//清空画板 this.PaintGrid();//画坐标系 Ellipse ep=new Ellipse(); ep.Height=300; ep.Width=300; ep.Stroke=new SolidColorBrush(Color.FromRgb(0, 0, 255)); ep.StrokeThickness=1; Canvas.SetLeft(ep,this.canvas.Width/2-ep.Width/2); Canvas.SetTop(ep,this.canvas.Height/2-ep.Height/2); this.canvas.Children.Add(ep); }

效果图

画椭圆代码

private void bth_paint_Ellipse(object sender, System.Windows.RoutedEventArgs e)//画椭圆 { this.canvas.Children.Clear();//清空画板 this.PaintGrid();//画坐标系 Ellipse ep=new Ellipse(); ep.Height=300; ep.Width=50; ep.Stroke=new SolidColorBrush(Color.FromRgb(0, 0, 255)); ep.StrokeThickness=1; Canvas.SetLeft(ep,this.canvas.Width/2-ep.Width/2); Canvas.SetTop(ep,this.canvas.Height/2-ep.Height/2); this.canvas.Children.Add(ep); }

效果图

清空画板代码

private void btn_Clear(object sender, System.Windows.RoutedEventArgs e) { this.canvas.Children.Clear();//清空画板 this.PaintGrid();//画坐标系 }

本次矢量画图编程就介绍到这里，如果还有不明白的地方，可以加入扣扣群234035436进行技术交流，希望大家多多支持！