C#读取并显示DXF文件

using System;using System.Drawing;using System.Globalization;using System.Linq;using System.Windows;using System.Windows.Input;using System.Windows.Media;using Microsoft.Win32;using netDxf;using netDxf.Entities;using System.Windows.Controls;namespace DXFReader{ /// <summary> /// MainWindow.xaml 的交互逻辑 /// </summary> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); } System.Windows.Point LastMousePosition; private DxfDocument dxf; protected override void OnMouseWheel(MouseWheelEventArgs e) { var x = Math.Pow(2, e.Delta / 3.0 / Mouse.MouseWheelDeltaForOneLine); MyCanvas.Scale *= x; foreach (var p in MyCanvas.Children) { System.Windows.Shapes.Path path = (System.Windows.Shapes.Path)p; //if (path.Name != "label") //{ path.StrokeThickness /= x; //} } var position = (Vector)e.GetPosition(Benchmark); MyCanvas.Offset = (System.Windows.Point)((Vector) (MyCanvas.Offset position) * x - position); e.Handled = true; } protected override void OnMouseMove(MouseEventArgs e) { var position = e.GetPosition(Benchmark); if (e.LeftButton == MouseButtonState.Pressed) { MyCanvas.Offset -= position - LastMousePosition; } LastMousePosition = position; } private void AddCircles() { foreach (var c in dxf.Circles) { EllipseGeometry circle = new EllipseGeometry(new System.Windows.Point(c.Center.X, -c.Center.Y), c.Radius, c.Radius); System.Windows.Shapes.Path path = new System.Windows.Shapes.Path(); GeometryGroup GeoGroup = new GeometryGroup(); GeoGroup.Children.Add(circle); path.Stroke = new SolidColorBrush(System.Windows.Media.Colors.White); path.Data = GeoGroup; path.Tag = "tu"; path.StrokeThickness = 2; path.MouseLeftButtonDown = (o, s) => { CalculateIntersection(path); }; MyCanvas.Children.Add(path); } } private void CalculateIntersection(System.Windows.Shapes.Path path) { path.Stroke = new SolidColorBrush(System.Windows.Media.Colors.Yellow); if (path.Tag.ToString() == "line") { LineGeometry line = (LineGeometry)(((GeometryGroup)path.Data).Children[0]); double dx = line.StartPoint.X - line.EndPoint.X; double k = 0; double b = 0; if (dx != 0) { k = (line.StartPoint.Y - line.EndPoint.Y) / (line.StartPoint.X - line.EndPoint.X); b = line.StartPoint.Y - line.StartPoint.X; } else { k = 1000; b = 1000; } line1.Text = string.Format("{0},{1}", k.ToString(), b.ToString()); } } private void AddLines() { foreach (var l in dxf.Lines) { LineGeometry line = new LineGeometry(new System.Windows.Point(l.StartPoint.X, -l.StartPoint.Y), new System.Windows.Point(l.EndPoint.X, -l.EndPoint.Y)); //foreach (var p in MyCanvas.Children) //{ // System.Windows.Shapes.Path path = (System.Windows.Shapes.Path)p; // if ((string)path.Tag == l.Layer.Name) // { // ((GeometryGroup)path.Data).Children.Add(line); // } //} System.Windows.Shapes.Path path = new System.Windows.Shapes.Path(); GeometryGroup GeoGroup = new GeometryGroup(); GeoGroup.Children.Add(line); path.Stroke = new SolidColorBrush(System.Windows.Media.Colors.White); path.Data = GeoGroup; path.Tag = "line"; path.StrokeThickness = 2; path.MouseLeftButtonDown = (o, s) => { CalculateIntersection(path); }; MyCanvas.Children.Add(path); } } private void AddEllipses() { foreach (var e in dxf.Ellipses) { RotateTransform trans = new RotateTransform(-e.Rotation, e.Center.X, -e.Center.Y); EllipseGeometry ellipse = new EllipseGeometry(new System.Windows.Point(e.Center.X, -e.Center.Y), e.MajorAxis / 2, e.MinorAxis / 2, trans); //foreach (var p in MyCanvas.Children) //{ // System.Windows.Shapes.Path path = (System.Windows.Shapes.Path)p; // if ((string)path.Tag == e.Layer.Name) // { // ((GeometryGroup)path.Data).Children.Add(ellipse); // } //} System.Windows.Shapes.Path path = new System.Windows.Shapes.Path(); GeometryGroup GeoGroup = new GeometryGroup(); GeoGroup.Children.Add(ellipse); path.Stroke = new SolidColorBrush(System.Windows.Media.Colors.White); path.Data = GeoGroup; path.Tag = "ellipse"; path.StrokeThickness = 2; path.MouseLeftButtonDown = (o, s) => { CalculateIntersection(path); }; MyCanvas.Children.Add(path); } } private void AddArcs() { foreach (var a in dxf.Arcs) { double Sx = a.Center.X a.Radius * System.Math.Cos(a.StartAngle / 180 * Math.PI); double Sy = -a.Center.Y - a.Radius * System.Math.Sin(a.StartAngle / 180 * Math.PI); System.Windows.Point Start = new System.Windows.Point(Sx, Sy); double Ex = a.Center.X a.Radius * System.Math.Cos(a.EndAngle / 180 * Math.PI); double Ey = -a.Center.Y - a.Radius * System.Math.Sin(a.EndAngle / 180 * Math.PI); System.Windows.Point End = new System.Windows.Point(Ex, Ey); ArcSegment arc = new ArcSegment(); arc.Point = End; arc.RotationAngle = a.EndAngle - a.StartAngle; arc.RotationAngle = arc.RotationAngle >= 0 ? arc.RotationAngle : arc.RotationAngle 360; arc.IsLargeArc = arc.RotationAngle > 180 ? true : false; arc.SweepDirection = SweepDirection.Counterclockwise; arc.Size = new System.Windows.Size(a.Radius, a.Radius); PathFigure path = new PathFigure(); path.StartPoint = Start; path.Segments.Add(arc); PathGeometry pathgeo = new PathGeometry(); pathgeo.Figures.Add(path); System.Windows.Shapes.Path _path = new System.Windows.Shapes.Path(); GeometryGroup GeoGroup = new GeometryGroup(); GeoGroup.Children.Add(pathgeo); _path.Stroke = new SolidColorBrush(System.Windows.Media.Colors.White); _path.Data = GeoGroup; _path.Tag = "arc"; _path.StrokeThickness = 2; _path.MouseLeftButtonDown = (o, s) => { CalculateIntersection(_path); }; MyCanvas.Children.Add(_path); } } private void AddPolylines() { foreach (var p in dxf.Polylines) { if (p.Flags == PolylineTypeFlags.OpenPolyline || p.Flags == PolylineTypeFlags.ClosedPolylineOrClosedPolygonMeshInM) { LightWeightPolyline polygon = (LightWeightPolyline)p; PathFigure path = new PathFigure(); float bulge = 0; System.Windows.Point prePoint = new System.Windows.Point(); System.Windows.Point point = new System.Windows.Point(); path.IsClosed = polygon.IsClosed; for (int i = 0; i < polygon.Vertexes.Count(); i) { var seg = polygon.Vertexes[i]; point = new System.Windows.Point(seg.Location.X, -seg.Location.Y); if (i == 0) { path.StartPoint = point; prePoint = point; bulge = seg.Bulge; //angle = 4 * System.Math.Atan(seg.Bulge) / Math.PI * 180; } else { ArcSegment arc = new ArcSegment(); arc.Point = point; //if (angle != 0) if (bulge != 0) { double angle = 4 * Math.Atan(Math.Abs(bulge)) / Math.PI * 180; double length = Math.Sqrt((point.X - prePoint.X) * (point.X - prePoint.X) (point.Y - prePoint.Y) * (point.Y - prePoint.Y)); //double radius = length / (Math.Sqrt(2 * (1 - Math.Cos(angle / 180 * Math.PI)))); double radius = Math.Abs(length / (2 * Math.Sin(angle / 360 * Math.PI))); arc.Size = new System.Windows.Size(radius, radius); arc.RotationAngle = angle; arc.SweepDirection = bulge < 0 ? SweepDirection.Clockwise : SweepDirection.Counterclockwise; arc.IsLargeArc = Math.Abs(bulge) > 1 ? true : false; } prePoint = point; bulge = seg.Bulge; //angle = 4 * System.Math.Atan(seg.Bulge) / Math.PI * 180; path.Segments.Add(arc); } } PathGeometry pathgeo = new PathGeometry(); pathgeo.Figures.Add(path); //foreach (var _p in MyCanvas.Children) //{ // System.Windows.Shapes.Path _path = (System.Windows.Shapes.Path)_p; // if ((string)_path.Tag == p.Layer.Name) // { // ((GeometryGroup)_path.Data).Children.Add(pathgeo); // } //} System.Windows.Shapes.Path _path = new System.Windows.Shapes.Path(); GeometryGroup GeoGroup = new GeometryGroup(); GeoGroup.Children.Add(pathgeo); _path.Stroke = new SolidColorBrush(System.Windows.Media.Colors.White); _path.Data = GeoGroup; _path.Tag = "polylines"; _path.StrokeThickness = 2; _path.MouseLeftButtonDown = (o, s) => { CalculateIntersection(_path); }; MyCanvas.Children.Add(_path); } } } private void AddText() { foreach (var t in dxf.Texts) { FormattedText formattedText = new FormattedText(t.Value, CultureInfo.GetCultureInfo("zh-CN"), FlowDirection.LeftToRight, new Typeface("仿宋体"), t.Height * (96.0 / 72.0), System.Windows.Media.Brushes.White); //SolidColorBrush brush = new SolidColorBrush(Colors.Orange); LinearGradientBrush brush = new LinearGradientBrush( Colors.Orange, Colors.Teal, 90.0); formattedText.SetForegroundBrush(brush); Geometry textGeometry = formattedText.BuildGeometry(new System.Windows.Point(t.BasePoint.X, -t.BasePoint.Y - t.Height * (96.0 / 72.0))); PathGeometry pathGeometry = textGeometry.GetFlattenedPathGeometry(); foreach (var p in MyCanvas.Children) { System.Windows.Shapes.Path path = (System.Windows.Shapes.Path)p; if ((string)path.Tag == "Character") { ((GeometryGroup)path.Data).Children.Add(pathGeometry); } } //Characters.Children.Add(pathGeometry); } } private void AddMText() { foreach (var t in dxf.MTexts) { FormattedText formattedText = new FormattedText(t.Value, CultureInfo.GetCultureInfo("zh-CN"), FlowDirection.LeftToRight, new Typeface("仿宋体"), t.Height * (96.0 / 72.0), System.Windows.Media.Brushes.White); double angle = 0; if (t.Normal.X != 0) { angle = Math.Atan(t.Normal.Y / t.Normal.X) / Math.PI * 180; angle = angle > 0 ? angle : angle 360; } else { if (t.Normal.Y > 0) { angle = 90; } else if (t.Normal.Y < 0) { angle = 270; } else { angle = 0; } } SolidColorBrush brush = new SolidColorBrush(Colors.White); //LinearGradientBrush brush = new LinearGradientBrush( // Colors.Orange, // Colors.Teal, // 90.0); formattedText.SetForegroundBrush(brush); //Geometry textGeometry = formattedText.BuildGeometry(new System.Windows.Point(t.BasePoint.X, -t.BasePoint.Y - t.Height * (96.0 / 72.0))); Geometry textGeometry = formattedText.BuildGeometry(new System.Windows.Point(t.BasePoint.X, -t.BasePoint.Y)); RotateTransform rt = new RotateTransform(-angle, t.BasePoint.X, -t.BasePoint.Y); textGeometry.Transform = rt; PathGeometry pathGeometry = textGeometry.GetFlattenedPathGeometry(); foreach (var p in MyCanvas.Children) { System.Windows.Shapes.Path path = (System.Windows.Shapes.Path)p; if ((string)path.Tag == "Character") { ((GeometryGroup)path.Data).Children.Add(pathGeometry); } } //Characters.Children.Add(pathGeometry); } } private void Button_Click(object sender, RoutedEventArgs e) { OpenFileDialog openDlg = new OpenFileDialog(); openDlg.Filter = "DXF 文件|*.dxf"; string filename="8.dxf"; if (openDlg.ShowDialog() == true) { // if (MyCanvas.Children.Count != 0) // MyCanvas.Children.Clear(); filename = openDlg.FileName; } dxf = new DxfDocument(); dxf.Load(filename); AddLayers(); AddGraph(); AdjustGraph(); } private void AddLayers() { foreach (var lay in dxf.Layers) { System.Windows.Shapes.Path path = new System.Windows.Shapes.Path(); path.Stroke = new SolidColorBrush(System.Windows.Media.Color.FromArgb(lay.Color.ToColor().A, lay.Color.ToColor().R, lay.Color.ToColor().G, lay.Color.ToColor().B)); path.Tag = lay.Name; GeometryGroup GeoGroup = new GeometryGroup(); path.Data = GeoGroup; MyCanvas.Children.Add(path); } System.Windows.Shapes.Path label = new System.Windows.Shapes.Path(); GeometryGroup Character = new GeometryGroup(); label.Data = Character; label.Tag = "Character"; MyCanvas.Children.Add(label); } void AddGraph() { AddCircles(); AddEllipses(); AddArcs(); //显示圆弧 AddLines(); //显示直线 AddPolylines(); AddText(); AddMText(); } private void AdjustGraph() { MyCanvas.Offset = new System.Windows.Point(0, 0); MyCanvas.Scale = 1; //double maxLeft=0 ; //double maxRight=0; //double maxTop=0; //double maxBottom=0 ; var bound = ((GeometryGroup)((System.Windows.Shapes.Path)(MyCanvas.Children[0])).Data).Bounds; double maxLeft = bound.Left; double maxRight = bound.Right; double maxTop = bound.Top; double maxBottom = bound.Bottom; foreach (var p in MyCanvas.Children) { System.Windows.Shapes.Path path = (System.Windows.Shapes.Path)p; if ((string)path.Tag == "Character") { path.StrokeThickness = 0.05; path.Stroke = System.Windows.Media.Brushes.White; path.Fill = System.Windows.Media.Brushes.White; } else { path.StrokeThickness = 1; } CalBounds(ref maxLeft, ref maxRight, ref maxTop, ref maxBottom, path); //path.Stroke = Brushes.White; //path.StrokeThickness = 2; //double Sx = path.Data.Bounds.Left (path.Data.Bounds.Right - path.Data.Bounds.Left) / 2; //double Sy = path.Data.Bounds.Top (path.Data.Bounds.Bottom - path.Data.Bounds.Top) / 2; //double width = path.Data.Bounds.Right - path.Data.Bounds.Left; //double length = path.Data.Bounds.Bottom - path.Data.Bounds.Top; //double scaleX = Benchmark.ActualWidth / (path.Data.Bounds.Right - path.Data.Bounds.Left); //double scaleY = Benchmark.ActualHeight / (path.Data.Bounds.Bottom - path.Data.Bounds.Top); } double Ex = Benchmark.ActualWidth / 2; double Ey = Benchmark.ActualHeight / 2; double Sx = maxLeft (maxRight - maxLeft) / 2; double Sy = maxTop (maxBottom-maxTop) / 2; double scaleX = Benchmark.ActualWidth / (maxRight - maxLeft); double scaleY = Benchmark.ActualHeight / (maxBottom - maxTop); var scale = (scaleX < scaleY ? scaleX : scaleY) * 0.8; MyCanvas.Scale *= scale; foreach (var p in MyCanvas.Children) { System.Windows.Shapes.Path path = (System.Windows.Shapes.Path)p; path.StrokeThickness /= scale; } System.Windows.Point size = new System.Windows.Point(Ex - scale * Sx, Ey - scale * Sy); MyCanvas.Offset -= (Vector)size; } private static void CalBounds(ref double maxLeft, ref double maxRight, ref double maxTop, ref double maxBottom, System.Windows.Shapes.Path path) { maxLeft = maxLeft < ((GeometryGroup)path.Data).Bounds.Left ? maxLeft : ((GeometryGroup)path.Data).Bounds.Left; maxRight = maxRight > ((GeometryGroup)path.Data).Bounds.Right ? maxRight : ((GeometryGroup)path.Data).Bounds.Right; maxTop = maxTop < ((GeometryGroup)path.Data).Bounds.Top ? maxTop : ((GeometryGroup)path.Data).Bounds.Top; maxBottom = maxBottom > ((GeometryGroup)path.Data).Bounds.Bottom ? maxBottom : ((GeometryGroup)path.Data).Bounds.Bottom; } private void ComboBox_SelectionChanged(object sender, System.Windows.Controls.SelectionChangedEventArgs e) { } }}