C#读取DXF文件.docx

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C#读取DXF文件.docx

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C#读取DXF文件.docx

C#读取DXF文件

usingSystem;

usingSystem.Collections.Generic;

usingSystem.ComponentModel;

usingSystem.Data;

usingSystem.Drawing;

usingSystem.Text;

usingSystem.Windows.Forms;

usingSystem.IO;

usingSystem.Collections;

namespaceDXF

{

publicpartialclassForm1:

Form

{

privateFileStreamfs;

privateStreamReadersr;

privateArrayListLayerList=newArrayList();

privateArrayListLineList=newArrayList();

privateArrayListArcList=newArrayList();

privateArrayListEllipseList=newArrayList();

privateArrayListLwopolylineList=newArrayList();

privateArrayListSplineList=newArrayList();

privatestring[]str=newstring[2];

privateintcount;

privatedoubleleftx;

privatedoublelefty;

privatedoublerightx;

privatedoublerighty;

publicForm1()

{

InitializeComponent();

}

privatestring[]ReadPair()

{

stringcode=sr.ReadLine().Trim();

stringcodedata=sr.ReadLine().Trim();

count+=2;

string[]result=newstring[2]{code,codedata};

returnresult;

}

privatevoidRead()

{

while(sr.Peek()!

=-1)

{

str=ReadPair();

if(str[1]=="SECTION")

{

str=ReadPair();

switch(str[1])

{

case"HEADER":

ReadHeader();

break;

case"TABLES":

ReadTable();

break;

case"ENTITIES":

ReadEntities();

break;

}

}

}

sr.Close();

fs.Close();

btDraw.Enabled=true;

label1.Text=count.ToString();

count=0;

}

privatevoidReadTable()

{

while(str[1]!

="ENDSEC")

{

while(str[0]!

="2"||str[1]!

="LAYER")

{

str=ReadPair();

}

while(str[0]!

="0"||str[1]!

="LAYER")

{

str=ReadPair();

}

while(str[0]=="0"&&str[1]=="LAYER")

{

ReadLAYER();

}

while(str[1]!

="ENDSEC")

{

str=ReadPair();

}

}

}

privatevoidReadLAYER()

{

LAYERnewlayer=newLAYER();

while(str[1]!

="ENDTAB")

{

str=ReadPair();

switch(str[0])

{

case"2":

newlayer.name=str[1];

break;

case"62":

newlayer.colornum=str[1];

break;

case"6":

newlayer.lstyle=str[1];

break;

case"370":

newlayer.lwidth=str[1];

break;

}

if(str[0]=="0"&&str[1]=="LAYER")

{

LayerList.Add(newlayer);

return;

}

}

LayerList.Add(newlayer);

}

privatevoidReadEntities()

{

while(str[1]!

="ENDSEC")

{

switch(str[1])

{

case"LINE":

ReadLine();

break;

case"ARC":

ReadArc();

break;

case"CIRCLE":

ReadArc();

break;

case"ELLIPSE":

ReadEllipse();

break;

case"LWPOLYLINE":

ReadLwpolyline();

break;

case"SPLINE":

ReadSpline();

break;

default:

str=ReadPair();

break;

}

}

}

privatevoidReadArc()

{

ARCnewarc=newARC();

while(str[1]!

="ENDSEC")

{

str=ReadPair();

switch(str[0])

{

case"8":

newarc.LName=str[1];

break;

case"10":

newarc.CenterX=Double.Parse(str[1]);

break;

case"20":

newarc.CenterY=Double.Parse(str[1]);

break;

case"40":

newarc.Radiu=Double.Parse(str[1]);

break;

case"50":

newarc.SAngle=Double.Parse(str[1]);

break;

case"51":

newarc.EAngle=Double.Parse(str[1]);

break;

case"370":

newarc.lwidth=str[1];

break;

case"0":

ArcList.Add(newarc);

return;

}

}

}

privatevoidReadLine()

{

LINEnewline=newLINE();

while(str[1]!

="ENDSEC")

{

str=ReadPair();

switch(str[0])

{

case"8":

newline.LName=str[1];

break;

case"10":

newline.StartX=Double.Parse(str[1]);

break;

case"20":

newline.StartY=Double.Parse(str[1]);

break;

case"11":

newline.EndX=Double.Parse(str[1]);

break;

case"21":

newline.EndY=Double.Parse(str[1]);

break;

case"62":

newline.colornum=str[1];

break;

case"370":

newline.lwidth=str[1];

break;

case"0":

LineList.Add(newline);

return;

}

}

}

privatevoidReadEllipse()

{

ELLIPSEnewellipse=newELLIPSE();

while(str[1]!

="ENDSEC")

{

str=ReadPair();

switch(str[0])

{

case"8":

newellipse.LName=str[1];

break;

case"10":

newellipse.CenterX=Double.Parse(str[1]);

break;

case"20":

newellipse.CenterY=Double.Parse(str[1]);

break;

case"11":

newellipse.DeltaX=Double.Parse(str[1]);

break;

case"21":

newellipse.DeltaY=Double.Parse(str[1]);

break;

case"40":

newellipse.Radio=Double.Parse(str[1]);

break;

case"41":

newellipse.PSAngle=Double.Parse(str[1]);

break;

case"42":

newellipse.PEAngle=Double.Parse(str[1]);

break;

case"370":

newellipse.lwidth=str[1];

break;

case"0":

EllipseList.Add(newellipse);

return;

}

}

}

privatevoidReadLwpolyline()

{

LWPOLYLINEnewlw=newLWPOLYLINE();

while(str[1]!

="ENDSEC")

{

str=ReadPair();

switch(str[0])

{

case"8":

newlw.LName=str[1];

break;

case"370":

newlw.lwidth=str[1];

break;

case"62":

newlw.colornum=str[1];

break;

case"90":

newlw.PointCount=Int32.Parse(str[1]);

break;

case"70":

newlw.Flag=Int32.Parse(str[1]);

break;

case"10":

newlw.pointx=newdouble[newlw.PointCount];

newlw.pointy=newdouble[newlw.PointCount];

//if(newlw.Flag==1)

newlw.converxity=newdouble[newlw.PointCount];

//else

//newlw.converxity=newdouble[newlw.PointCount-1];

newlw.pointx[0]=Double.Parse(str[1]);

str=ReadPair();

newlw.pointy[0]=Double.Parse(str[1]);

for(inti=1;i

{

stringtemp=sr.ReadLine().Trim();

if(temp=="42")

{

newlw.converxity[i-1]=Double.Parse(sr.ReadLine().Trim());

i--;

}

elseif(temp=="20")

{

stringr=sr.ReadLine().Trim();

newlw.pointy[i]=Double.Parse(r);

}

else

{

stringr=sr.ReadLine().Trim();

newlw.pointx[i]=Double.Parse(r);

i--;

}

}

strings=sr.ReadLine().Trim();

if(s=="42")

newlw.converxity[newlw.PointCount-1]=Double.Parse(sr.ReadLine().Trim());

elseif(s=="0")

{

sr.ReadLine();

LwopolylineList.Add(newlw);

return;

}

elsesr.ReadLine();

break;

case"0":

LwopolylineList.Add(newlw);

return;

}

}

}

publicvoidReadSpline()

{

SPLINEnewspline=newSPLINE();

while(str[1]!

="ENDSEC")

{

str=ReadPair();

switch(str[0])

{

case"8":

newspline.LName=str[1];

break;

case"370":

newspline.lwidth=str[1];

break;

case"62":

newspline.colornum=str[1];

break;

case"70":

newspline.Flag=Int32.Parse(str[1]);

break;

case"74":

newspline.Count=Int32.Parse(str[1]);

newspline.throughpx=newdouble[Int32.Parse(str[1])];

newspline.throughpy=newdouble[Int32.Parse(str[1])];

break;

case"12":

newspline.SVertorX=Double.Parse(str[1]);

break;

case"22":

newspline.SVertorY=Double.Parse(str[1]);

break;

case"13":

newspline.EVertorX=Double.Parse(str[1]);

break;

case"23":

newspline.EVertorY=Double.Parse(str[1]);

break;

case"11":

newspline.throughpx[0]=Double.Parse(str[1]);

str=ReadPair();

newspline.throughpy[0]=Double.Parse(str[1]);

str=ReadPair();

for(inti=1;i

{

str=ReadPair();

if(str[0]=="11")

{

newspline.throughpx[i]=Double.Parse(str[1]);

i--;

}

elseif(str[0]=="21")

{

newspline.throughpy[i]=Double.Parse(str[1]);

i--;

}

}

if(newspline.Flag==11)

{

for(inti=0;i<3;i++)

{

str=ReadPair();

}

}

break;

case"0":

SplineList.Add(newspline);

return;

}

}

}

publicvoidReadHeader()

{

while(str[1]!

="ENDSEC")

{

str=ReadPair();

switch(str[1])

{

case"$EXTMIN":

str=ReadPair();

leftx=Double.Parse(str[1]);

str=ReadPair();

lefty=Double.Parse(str[1]);

break;

case"$EXTMAX":

str=ReadPair();

rightx=Double.Parse(str[1]);

str=ReadPair();

righty=Double.Parse(str[1]);

break;

}

}

}

//打开DXF文件

privatevoidbtOpen_Click(objectsender,EventArgse)

{

btDraw.Enabled=false;

LayerList.Clear();

LineList.Clear();

ArcList.Clear();

EllipseList.Clear();

LwopolylineList.Clear();

SplineList.Clear();

this.openFileDialog1.ShowDialog();

if(this.openFileDialog1.FileName.Trim()!

="")

{

stringpath=this.openFileDialog1.FileName;

fs=newFileStream(path,FileMode.Open,FileAccess.Read);

sr=newStreamReader(fs);

Read();

}

}

privatevoidbtDraw_Click(objectsender,EventArgse)

{

doublewidth=Math.Ceiling(rightx)-Math.Ceiling(leftx)+40;

doubleheight=Math.Ceiling(righty)-Math.Ceiling(lefty)+40;

Bitmapbmp=newBitmap((int)width,(int)height);

Graphicsgx=Graphics.FromImage(bmp);

doublepw=width/(double)460;

doubleph=height/(double)384;

for(inti=0;i

{

LINEtemp=(LINE)LineList[i];

temp.Move(leftx,lefty,righty-lefty+39);

temp.Draw(gx);

}

for(inti=0;i

{

ARCtemp=(ARC)ArcList[i];

temp.Move(leftx,lefty,righty-lefty+39);

temp.Draw(gx);

}

for(inti=0;i

{

ELLIPSEtemp=(ELLIPSE)EllipseList[i];

temp.Move(leftx+1,lefty+1);

temp.Draw(gx,height-1,pw,ph);

}

for(inti=0;i

{

LWPOLYLINEtemp=(LWPOLYLINE)LwopolylineList[i];

temp.Draw(gx,leftx,lefty,righty-lefty+39);

}

for(inti=0;i

{

SPLINEtemp=(SPLINE)SplineList[i];

temp.Draw(gx,leftx-10,lefty,righty-lefty+39);

}

this.pictureBox1.Image=bmp;

}

}

}

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