topic Re: Open and close database in ObjectARX Forum

Open and close database

nggarnaud — Thu, 28 Jun 2018 19:45:18 GMT

Dear all,

I have a problem with opening and closing the database in order to create my custom object to it. The .arx loads successfully, but when i invoke my command i am invite to debug or close the program. AuToCAD 2017 update 1.2 was installed with administrator right.

ARXDbg build fine in VS 2015 community with update 1. No problem at loading in AutoCAD 2017

Can anyone help me with these line of codes?

should i use a void function instead of a AcDbObject createGenerativeLinePrototype function?

What am i missing?

Thank you!!!

 cDbDatabase * pGenerativeDb;
 AcGePoint3d GenerativeStartPoint(5.0, 5.0, 5.0);
 AcGePoint3d GenerativeEndPoint(36.0, 36, 36.0);

 //GenerativeLinePrototype4 * pGLine04 = new GenerativeLinePrototype4(GenerativeStartPoint, GenerativeEndPoint);

 AcDbEntity* pGLine04 = new GenerativeLinePrototype4(GenerativeStartPoint, GenerativeEndPoint);

 
 AcDbBlockTable* pBlockTable;
 acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable, AcDb::kForRead);
 
 AcDbBlockTableRecord *pBlockTableRecord;
 pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
 

 AcDbObjectId GenerativeLinePrototype4Id;
 pBlockTable->add(GenerativeLinePrototype4Id, pBlockTableRecord);
 pBlockTableRecord->appendAcDbEntity(GenerativeLinePrototype4Id, pGLine04);
 pBlockTable->close();
 pBlockTableRecord->close();
 pGLine04->close();
 
 //pGLine04->objectClosed(GenerativeLinePrototype4Id);

Re: Open and close database

zrobert — Fri, 29 Jun 2018 06:52:48 GMT

Hi;

Try to Open block table for write, not for read.

Because you do not use pBlockTable only to access the model space, but later you add GenerativeLinePrototype4Id to pBlockTable .

Re: Open and close database

tbrammer — Fri, 29 Jun 2018 08:06:10 GMT

Basically your code contains exactly one disastrous wrong line

pBlockTable->add(GenerativeLinePrototype4Id, pBlockTableRecord);

I think your code should look like this:

AcDbDatabase * pGenerativeDb; // <-- What are you doing with this?
AcGePoint3d GenerativeStartPoint(5.0, 5.0, 5.0);
AcGePoint3d GenerativeEndPoint(36.0, 36, 36.0);

AcDbEntity* pGLine04 = new GenerativeLinePrototype4(GenerativeStartPoint, GenerativeEndPoint);

AcDbBlockTable* pBlockTable;
Acad::ErrorStatus es;
es = acdbHostApplicationServices()->workingDatabase()->getSymbolTable(pBlockTable, AcDb::kForRead);
if (es==Acad::eOk)
{ 
	AcDbBlockTableRecord *pBlockTableRecord;
	es = pBlockTable->getAt(ACDB_MODEL_SPACE, pBlockTableRecord, AcDb::kForWrite);
	if (es==Acad::eOk)
	{
		 AcDbObjectId GenerativeLinePrototype4Id;
		 //NO!!! You don't want to add to the block table!
		 //pBlockTable->add(GenerativeLinePrototype4Id, pBlockTableRecord); 
		 pBlockTableRecord->appendAcDbEntity(GenerativeLinePrototype4Id, pGLine04);
		 pBlockTableRecord->close();
		 pGLine04->close();
	}
	pBlockTable->close();
}

It is perfectly right to open the block table for read only, because you only use it to open the model space blocktable record. I only added some error checking.

Re: Open and close database

nggarnaud — Fri, 29 Jun 2018 15:14:48 GMT

Thank you all, i will give it a try and come back at you pretty soon.