C#读取DXF文件.docx

1、C#读取DXF文件using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.IO;using System.Collections;namespace DXF public partial class Form1 : Form private FileStream fs; private StreamReader

2、sr; private ArrayList LayerList = new ArrayList(); private ArrayList LineList = new ArrayList(); private ArrayList ArcList=new ArrayList(); private ArrayList EllipseList = new ArrayList(); private ArrayList LwopolylineList = new ArrayList(); private ArrayList SplineList=new ArrayList(); private stri

3、ng str = new string2; private int count; private double leftx; private double lefty; private double rightx; private double righty; public Form1() InitializeComponent(); private string ReadPair() string code = sr.ReadLine().Trim(); string codedata = sr.ReadLine().Trim(); count += 2; string result = n

4、ew string2 code, codedata ; return result; private void Read() while (sr.Peek() != -1) str = ReadPair(); if (str1 = SECTION) str = ReadPair(); switch (str1) case HEADER: ReadHeader(); break; case TABLES: ReadTable(); break; case ENTITIES: ReadEntities(); break; sr.Close(); fs.Close(); btDraw.Enabled

5、 = true; label1.Text = count.ToString(); count = 0; private void ReadTable() while (str1 != ENDSEC) while (str0 != 2 | str1 != LAYER) str = ReadPair(); while (str0 != 0 | str1 != LAYER) str = ReadPair(); while (str0 = 0 & str1 = LAYER) ReadLAYER(); while (str1 != ENDSEC) str = ReadPair(); private vo

6、id ReadLAYER() LAYER newlayer = new LAYER(); while (str1 != ENDTAB) str = ReadPair(); switch (str0) case 2: newlayer.name = str1; break; case 62: newlayer.colornum = str1; break; case 6: newlayer.lstyle = str1; break; case 370: newlayer.lwidth = str1; break; if (str0 = 0 & str1 = LAYER) LayerList.Ad

7、d(newlayer); return; LayerList.Add(newlayer); private void ReadEntities() while (str1 != ENDSEC) switch (str1) case LINE: ReadLine(); break; case ARC: ReadArc(); break; case CIRCLE: ReadArc(); break; case ELLIPSE: ReadEllipse(); break; case LWPOLYLINE: ReadLwpolyline(); break; case SPLINE: ReadSplin

8、e(); break; default: str = ReadPair(); break; private void ReadArc() ARC newarc = new ARC(); while (str1 != ENDSEC) str = ReadPair(); switch (str0) case 8: newarc.LName = str1; break; case 10: newarc.CenterX = Double.Parse(str1); break; case 20: newarc.CenterY = Double.Parse(str1); break; case 40: n

9、ewarc.Radiu = Double.Parse(str1); break; case 50: newarc.SAngle = Double.Parse(str1); break; case 51: newarc.EAngle = Double.Parse(str1); break; case 370: newarc.lwidth = str1; break; case 0: ArcList.Add(newarc); return; private void ReadLine() LINE newline = new LINE(); while (str1 != ENDSEC) str =

10、 ReadPair(); switch (str0) case 8: newline.LName = str1; break; case 10: newline.StartX = Double.Parse(str1); break; case 20: newline.StartY = Double.Parse(str1); break; case 11: newline.EndX = Double.Parse(str1); break; case 21: newline.EndY = Double.Parse(str1); break; case 62: newline.colornum =

11、str1; break; case 370: newline.lwidth = str1; break; case 0: LineList.Add(newline); return; private void ReadEllipse() ELLIPSE newellipse = new ELLIPSE(); while (str1 != ENDSEC) str = ReadPair(); switch (str0) case 8: newellipse.LName = str1; break; case 10: newellipse.CenterX = Double.Parse(str1);

12、break; case 20: newellipse.CenterY = Double.Parse(str1); break; case 11: newellipse.DeltaX = Double.Parse(str1); break; case 21: newellipse.DeltaY = Double.Parse(str1); break; case 40: newellipse.Radio = Double.Parse(str1); break; case 41: newellipse.PSAngle = Double.Parse(str1); break; case 42: new

13、ellipse.PEAngle = Double.Parse(str1); break; case 370: newellipse.lwidth = str1; break; case 0: EllipseList.Add(newellipse); return; private void ReadLwpolyline() LWPOLYLINE newlw = new LWPOLYLINE(); while (str1 != ENDSEC) str = ReadPair(); switch (str0) case 8: newlw.LName = str1; break; case 370:

14、newlw.lwidth = str1; break; case 62: newlw.colornum = str1; break; case 90: newlw.PointCount = Int32.Parse(str1); break; case 70: newlw.Flag = Int32.Parse(str1); break; case 10: newlw.pointx = new doublenewlw.PointCount; newlw.pointy = new doublenewlw.PointCount; /if (newlw.Flag = 1) newlw.converxit

15、y = new doublenewlw.PointCount; /else /newlw.converxity = new doublenewlw.PointCount - 1; newlw.pointx0 = Double.Parse(str1); str=ReadPair(); newlw.pointy0 = Double.Parse(str1); for (int i = 1; i newlw.PointCount; i+) string temp = sr.ReadLine().Trim(); if (temp = 42) newlw.converxityi - 1 = Double.

16、Parse(sr.ReadLine().Trim(); i-; else if (temp = 20) string r = sr.ReadLine().Trim(); newlw.pointyi = Double.Parse(r); else string r = sr.ReadLine().Trim(); newlw.pointxi = Double.Parse(r); i-; string s = sr.ReadLine().Trim(); if (s = 42) newlw.converxitynewlw.PointCount - 1 = Double.Parse(sr.ReadLin

17、e().Trim(); else if (s = 0) sr.ReadLine(); LwopolylineList.Add(newlw); return; else sr.ReadLine(); break; case 0: LwopolylineList.Add(newlw); return; public void ReadSpline() SPLINE newspline = new SPLINE(); while (str1 != ENDSEC) str = ReadPair(); switch (str0) case 8: newspline.LName = str1; break

18、; case 370: newspline.lwidth = str1; break; case 62: newspline.colornum = str1; break; case 70: newspline.Flag = Int32.Parse(str1); break; case 74: newspline.Count = Int32.Parse(str1); newspline.throughpx = new doubleInt32.Parse(str1); newspline.throughpy = new doubleInt32.Parse(str1); break; case 1

19、2: newspline.SVertorX = Double.Parse(str1); break; case 22: newspline.SVertorY = Double.Parse(str1); break; case 13: newspline.EVertorX = Double.Parse(str1); break; case 23: newspline.EVertorY = Double.Parse(str1); break; case 11: newspline.throughpx0 = Double.Parse(str1); str = ReadPair(); newsplin

20、e.throughpy0 = Double.Parse(str1); str = ReadPair(); for(int i=1;inewspline.throughpx.Length;i+) str=ReadPair(); if(str0=11) newspline.throughpxi=Double.Parse(str1); i-; else if(str0=21) newspline.throughpyi=Double.Parse(str1); i-; if(newspline.Flag=11) for(int i=0;i3;i+) str=ReadPair(); break; case

21、 0: SplineList.Add(newspline); return; public void ReadHeader() while (str1 != ENDSEC) str = ReadPair(); switch (str1) case $EXTMIN: str = ReadPair(); leftx = Double.Parse(str1); str = ReadPair(); lefty = Double.Parse(str1); break; case $EXTMAX: str = ReadPair(); rightx = Double.Parse(str1); str = R

22、eadPair(); righty = Double.Parse(str1); break; /打开DXF文件 private void btOpen_Click(object sender, EventArgs e) btDraw.Enabled = false; LayerList.Clear(); LineList.Clear(); ArcList.Clear(); EllipseList.Clear(); LwopolylineList.Clear(); SplineList.Clear(); this.openFileDialog1.ShowDialog(); if (this.op

23、enFileDialog1.FileName.Trim() != ) string path = this.openFileDialog1.FileName; fs = new FileStream(path, FileMode.Open, FileAccess.Read); sr = new StreamReader(fs); Read(); private void btDraw_Click(object sender, EventArgs e) double width = Math.Ceiling(rightx) - Math.Ceiling(leftx) + 40; double h

24、eight = Math.Ceiling(righty) - Math.Ceiling(lefty) + 40; Bitmap bmp = new Bitmap(int)width, (int)height); Graphics gx = Graphics.FromImage(bmp); double pw = width / (double)460; double ph = height / (double)384; for (int i = 0; i LineList.Count; i+) LINE temp = (LINE)LineListi; temp.Move(leftx, left

25、y, righty - lefty + 39); temp.Draw(gx); for (int i = 0; i ArcList.Count; i+) ARC temp = (ARC)ArcListi; temp.Move(leftx, lefty, righty - lefty + 39); temp.Draw(gx); for (int i = 0; i EllipseList.Count; i+) ELLIPSE temp = (ELLIPSE)EllipseListi; temp.Move(leftx + 1, lefty + 1); temp.Draw(gx, height - 1

26、, pw, ph); for (int i = 0; i LwopolylineList.Count; i+) LWPOLYLINE temp = (LWPOLYLINE)LwopolylineListi; temp.Draw(gx, leftx, lefty, righty - lefty + 39); for (int i = 0; i SplineList.Count; i+) SPLINE temp = (SPLINE)SplineListi; temp.Draw(gx, leftx - 10, lefty, righty - lefty + 39); this.pictureBox1.Image = bmp;