WPF绘制矢量图形并绑定到界面的方法

这里先封装一个方法，使用的时候先创建一个Draw，拿到DrawingContext 之后就可以通过DrawingContext 去绘制想要的图形，绘制完成后通过GetDraw拿到所有绘制的结果
添加一个PrintImage()用于测试当前绘图的样子用于测试

 public class DrawVector { public DrawingVisual? visual { get; set; } public DrawingContext CreateDraw() { if (visual == null) visual = new DrawingVisual(); var dc = visual.RenderOpen(); return dc; } public DrawingGroup? GetDraw(DrawingContext? dc) { if (visual == null) return null; if (dc == null) return null; Dispose(dc); var draw = visual.Drawing.Frozen(); //PrintImage(); return draw; } /// 
 /// 测试打印绘图结果 ///  private void PrintImage() { var bmp = new RenderTargetBitmap(2000, 2000, 96, 96, PixelFormats.Pbgra32); bmp.Render(visual); var encoder = new PngBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(bmp)); using (var stream = new FileStream($"D:\\{Guid.NewGuid()}.png", FileMode.Create)) { encoder.Save(stream); } } public void RotationAngle(DrawingContext dc, Rect rect, double angleInDegrees) { var rotateTransform = new RotateTransform(angleInDegrees, rect.X + rect.Width / 2, rect.Y + rect.Height / 2); dc.PushTransform(rotateTransform); } private void Dispose(DrawingContext? dc) { if (dc != null) dc.Close(); } }

使用实例

 var drawVector = new DrawVector(); var dc = drawVector.CreateDraw();dc.DrawRectangle(System.Windows.Media.Brushes.White, new System.Windows.Media.Pen(System.Windows.Media.Brushes.White, 1).Frozen(), new Rect(0, 0, MapBackCanvasWidth, MapBackCanvasHeight)); DrawVectorContent(dc); return drawVector.GetDraw(dc);