topic Re: problem reading in dxf/dwg files in .NET Forum

problem reading in dxf/dwg files

Anonymous — Tue, 08 Jan 2013 14:25:05 GMT

hello everyone,

i am developing some code to read in mass dxf OR dwg files, seperate the two, then convert each to a database to be read later. however, whenever i run it, i get this error:

System.AccessViolationException: Attempted to read or write protected memory. this is often an indication that other memory is corrupt.

at AcDbDatabase.dxfIn(AcDbDatabase*, Char*, Char*)

at Autodesk.AutoCAD.DatabaseServices.Database.DxfIn(String fileName, String logFilename)

at ZahnerCommands.Commands.GetFiles()....line 72

here is the code that i have so far. i have been tinkering around with it for a few days and cannot seem to get it to work. the dxf file i have chosen works perfectly well, and i am using autocad 2011. thank you for all of your help

using

Autodesk.AutoCAD.ApplicationServices;

using

Autodesk.AutoCAD.DatabaseServices;

using

Autodesk.AutoCAD.EditorInput;

using

Autodesk.AutoCAD.Runtime;

using

System.Runtime.InteropServices;

using

Autodesk.AutoCAD.Interop;

using

Autodesk.AutoCAD.Interop.Common;

....

publicvoid GetFiles()

{

Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument;

Editor ed = doc.Editor;

ed.WriteMessage(

"\nChoose an input folder");

inFolderPath = ChooseFolder();

dwgFilePaths =

Directory.GetFiles(inFolderPath, "*.dwg");

dxfFilePaths =

Directory.GetFiles(inFolderPath, "*.dxf");

// Converts to dxf files into readable databases. refer to the transaction manager to read specific info

dxfInfo =

new Database[dxfFilePaths.Length];

for (int i = 0; i < dxfFilePaths.Length; i++)

{

string tempFile = inFolderPath + "\\" + (i+1) + "TEMPLOG.txt";

try

{

using (File.CreateText(tempFile))

{

dxfInfo[i] =

new Database(false, true);

using (dxfInfo[i])

{

try

{

dxfInfo[i].DxfIn(dxfFilePaths[i], tempFile);

//Autodesk.AutoCAD.DatabaseServices. perhaps? this is line 72

}

catch (System.Exception wx)

{

MessageBox.Show("Unable to read the " + (i + 1) + " file. Check TEMPLOG.txt and\n" +wx, "Can't Read File", MessageBoxButtons.OK, MessageBoxIcon.Error);

return;

}

catch // this was to catch for any old dxf files; i got the idea from kean's blog

{

dxfInfo[i] =

new Database(true, false);

using (dxfInfo[i])

{

try

{

dxfInfo[i].DxfIn(dxfFilePaths[i], tempFile);

}

catch (System.Exception wx)

{

MessageBox.Show("Unable to read the " + (i+1) + " file. Check TEMPLOG.txt, and\n" +wx, "Can't Read File", MessageBoxButtons.OK, MessageBoxIcon.Error);

return;

}

if there is anything else i can provide please let me know. i am at my wits end trying to figure out what is wrong.

ps: if this is the wrong section please direct me to the correct one.

Re: problem reading in dxf/dwg files

Alexander.Rivilis — Tue, 08 Jan 2013 14:34:38 GMT

Try to remove line:

using (File.CreateText(tempFile))

If you open tempFile for write then method Database.DxfIn can not open this file for write also.

Re: problem reading in dxf/dwg files

Anonymous — Tue, 08 Jan 2013 15:33:02 GMT

thank you very much! that seemed to have solved the read in problem, but now i am having a problem saving the database file as a .dwg. i feel i may have over simplified this process, but one of the main points of this program is to be a batch converter between the two file types (thus the arrays). i am getting a very similiar error, except with the saveAs command instead. here is the code i am working on:

(same using statements as before)

public void DXFtoDWG()

{

try

{

outFileInfo =

newDatabase[inFileInfo.Length];

inFileInfo.CopyTo(outFileInfo, 0);

//the data from dxfInfo has been copied to inFileInfo already

string prefix = inFolderPath;

newDWGFilePaths =

newString[dxfFilePaths.Length];

for (int i = 0; i < outFileInfo.Length; i++) // this is line 170

{

newDWGFilePaths[i] = dxfFilePaths[i].Substring(0, dxfFilePaths[i].Length - 4);

newDWGFilePaths[i] = outFolderPath + dxfFilePaths[i].Substring(prefix.Length) +

".dwg";

//using (File.Create(newDWGFilePaths[i])) i have tried it with and without this using statement

//{

//change the dwgVersion to newer updates of autocad (2013 would be AC1027)

//using (outFileInfo[i]) i have tried it with and without this using statement

//{

outFileInfo[i].SaveAs(newDWGFilePaths[i],

DwgVersion.AC1024);

//}

}

thank you again.

p.s.: this is the exact error:

System.AccessViolationException: Attempted to read or write protected memory. this is often an indication that other memory is corrupt.

at AcDbDatabase.saveAs(AcDbDatabase*, Char*, Boolean, AcDbDwgVersion, SecurityParams*)

at Autodesk.AutoCAD.DatabaseServices.Database.SaveAs(String fileName, DwgVersion version)

at ZahnerCommands.Commands.DXFtoDWG....line 170

enabling the using statements moves the error to 179, which is the actual saveAs statement. thank you for all your help

Re: problem reading in dxf/dwg files

Anonymous — Tue, 08 Jan 2013 16:08:08 GMT

i removed the using statements and same error occurs at the saveAs place still. all other using statements in the code have been properly closed.

p.s. sorry for the double post but i couldnt edit it again

Re: problem reading in dxf/dwg files

Balaji_Ram — Tue, 15 Jan 2013 15:38:33 GMT

Hello,

If you still have this issue, can you please share a buildable sample project to reproduce the crash ?

I can then debug it to see what is causing it.