<?xml encoding=”UTF-8″>By Virupaksha Aithal
The “AcDbDatabase::loadLineTypeFile” can load linetypes from a linetype file. If the linetype with the same name already exists in the database, then the loadLineTypeFile method can return an error code. A way to force the reloading of linetype is to load the linetype in another database and clone the linetype back to the host database to replace it. Here is a code snippet to do that :
Acad::ErrorStatus es; AcDbDatabase *pDb = acdbHostApplicationServices()->workingDatabase(); TCHAR szLtFile[MAX_PATH]; <span>if</span><span> ( RTNORM != </span> acedFindFile(_T("TrimCADLinetypes.LIN"), szLtFile) ) <span>{</span> acutPrintf(ACRX_T("\nLinetype file <span>not</span><span> found !"));</span> <span>return</span><span> ;</span> <span>}</span> AcDbLinetypeTable *pLtTable = NULL; es = pDb->getLinetypeTable(pLtTable,AcDb::kForRead); ACHAR *szLtype = ACRX_T("FLATDOTS"); bool isLinetypeLoaded = pLtTable->has(szLtype); es = pLtTable->close(); <span>if</span><span> (isLinetypeLoaded)</span> <span>{</span> // Already loaded, <span>try</span><span> reloading the linetype</span> AcDbDatabase *pTempDatabase = <span>new</span><span> AcDbDatabase(true, <span>false</span><span> );</span></span> es = pTempDatabase->loadLineTypeFile (szLtype, szLtFile); <span>if</span><span> (Acad::eOk == es)</span> <span>{</span> AcDbLinetypeTable *pTempLtTable; AcDbLinetypeTableRecord *pTempLtRec=NULL; es = pTempDatabase->getLinetypeTable( pTempLtTable,AcDb::kForRead); AcDbObjectId ltRecId = AcDbObjectId::kNull; es = pTempLtTable->getAt(szLtype, ltRecId); pTempLtTable->close(); AcDbObjectIdArray objIdArray; objIdArray.append(ltRecId); AcDbIdMapping idMap; es = pDb->wblockCloneObjects( objIdArray, pDb->linetypeTableId(), idMap, AcDb::kDrcReplace); <span>if</span><span> (Acad::eOk == es)</span> <span>{</span> acutPrintf( ACRX_T("\nLinetype reloaded !")); <span>}</span> <span>else</span><span> </span> <span>{</span> acutPrintf( ACRX_T("\nSorry, could <span>not</span><span> reload Linetype !"));</span> <span>}</span> <span>}</span> <span>else</span><span> </span> <span>{</span> acutPrintf( ACRX_T("\nError loading linetype <span>from</span><span> file !"));</span> <span>}</span> delete pTempDatabase; <span>}</span> <span>else</span><span> </span> <span>{</span>// <span>Not</span><span> loaded, <span>try</span><span> loading the linetype</span></span> <span>if</span><span> ( Acad::eOk == </span> pDb->loadLineTypeFile(szLtype, szLtFile)) <span>{</span> acutPrintf( ACRX_T("\nLinetype loaded <span>from</span><span> file !"));</span> <span>}</span> <span>else</span><span> </span> <span>{</span> acutPrintf( ACRX_T("\nError loading linetype <span>from</span><span> file !"));</span> <span>}</span> <span>}</span>
Leave a Reply