ARX实例代码--获得XREF的路径而不管是否在图中保存

LoveArx

1. 
   
2. 问题：
   
3. 在插入 图中的XREF没有保留路径信息时候，如何获得路径名？ AcDbBlockTableRecord::pathName 仅能获得保存的路径，是否有另外的API方法能获得完整的路径名？
   

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1. 
   
2. 解决方案：
   
3. 
   
4. 没有一个直接简单的API方法获得，但是要完成这个，可以用AcDbBlockTableRecord::xrefDatabase(bool incUnres = false) 来打开XREF文件的数据库，然后用AcDbDatabase::getFilename(const char*&
   
5. pOutput) 获得完整的路径，下面代码演示了如何做，具体看代码的注释。
   
6. 
   

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1. Acad::ErrorStatus getXrefPath( AcDbObjectId pId, const char *&pName )
   
2. {
   
3.     AcDbObject *pObj,*pRecObj;
   
4.     AcDbBlockReference *pBlkRef;
   
5.     AcDbObjectId pBTRId;
   
6.     AcDbBlockTableRecord* pRec;
   
7.     Acad::ErrorStatus es;
   
8. 
   
9.     //    open entiry
   
10.     es = acdbOpenObject(pObj, pId, AcDb::kForRead);
    
11.     assert(es == Acad::eOk);
    
12. 
    
13.     if(pObj->isKindOf(AcDbBlockReference::desc()))    // Is it a blockreference?
    
14.     {
    
15.         pBlkRef = AcDbBlockReference::cast(pObj);
    
16.         assert( pBlkRef );
    
17. 
    
18.         // get ID of the block table record that pObj referenced.
    
19.         pBTRId = pBlkRef->blockTableRecord();
    
20.         pObj->close();
    
21. 
    
22.         // open the block table record that pObj referenced.
    
23.         es = acdbOpenObject(pRecObj, pBTRId, AcDb::kForRead);
    
24.         assert(es == Acad::eOk);
    
25. 
    
26.         if(pRecObj->isKindOf(AcDbBlockTableRecord::desc())) // Is it a block table record?
    
27.         {
    
28.             pRec = AcDbBlockTableRecord::cast(pRecObj);
    
29.             assert( pRec );
    
30. 
    
31.             if( pRec->isFromExternalReference() )    // Is it a XREF?
    
32.             {
    
33. // The following lines apply to all conditions, retaining path information or not
    
34.                 pName =pRec->xrefDatabase(true)->originalFileName();
    
35. 
    
36. //    The following line just apply to XREF retaining the path information when inserted
    
37. //                pRec->pathName(pName);    // get path name if retained when insert
    
38. 
    
39.                 if(pName)
    
40.                     es = Acad::eOk;
    
41.                 else
    
42.                     es = Acad::eInvalidInput;
    
43.             }
    
44.             else
    
45.                 es = Acad::eInvalidInput;
    
46.         }
    
47.         else
    
48.             es = Acad::eInvalidInput;
    
49.     }
    
50.     else
    
51.     {
    
52.         pObj->close();
    
53.         es = Acad::eInvalidInput;
    
54.     }
    
55. 
    
56.     pRecObj->close();    // close XREF object
    
57.     return es;
    
58. }
    
59. 
    
60. //Please bear in mind that the above code will retrieve the path name of the copied drawing instead of the original drawing if XLOADCTL is set to 2.
    

Acad::ErrorStatus getXrefPath( AcDbObjectId pId, const char *&pName )<br /> {<br />     AcDbObject *pObj,*pRecObj;<br />     AcDbBlockReference *pBlkRef;<br />     AcDbObjectId pBTRId;<br />     AcDbBlockTableRecord* pRec;<br />     Acad::ErrorStatus es;<br /> <br />     //    open entiry<br />     es = acdbOpenObject(pObj, pId, AcDb::kForRead);<br />     assert(es == Acad::eOk);<br /> <br />     if(pObj->isKindOf(AcDbBlockReference::desc()))    // Is it a blockreference?<br />     {<br />         pBlkRef = AcDbBlockReference::cast(pObj);<br />         assert( pBlkRef );<br /> <br />         // get ID of the block table record that pObj referenced.<br />         pBTRId = pBlkRef->blockTableRecord();<br />         pObj->close();<br /> <br />         // open the block table record that pObj referenced.<br />         es = acdbOpenObject(pRecObj, pBTRId, AcDb::kForRead);<br />         assert(es == Acad::eOk);<br /> <br />         if(pRecObj->isKindOf(AcDbBlockTableRecord::desc())) // Is it a block table record?<br />         {<br />             pRec = AcDbBlockTableRecord::cast(pRecObj);<br />             assert( pRec );<br /> <br />             if( pRec->isFromExternalReference() )    // Is it a XREF?<br />             {<br /> // The following lines apply to all conditions, retaining path information or not<br />                 pName =pRec->xrefDatabase(true)->originalFileName();<br /> <br /> //    The following line just apply to XREF retaining the path information when inserted<br /> //                pRec->pathName(pName);    // get path name if retained when insert<br /> <br />                 if(pName)<br />                     es = Acad::eOk;<br />                 else<br />                     es = Acad::eInvalidInput;<br />             }<br />             else<br />                 es = Acad::eInvalidInput;<br />         }<br />         else<br />             es = Acad::eInvalidInput;<br />     }<br />     else<br />     {<br />         pObj->close();<br />         es = Acad::eInvalidInput;<br />     }<br /> <br />     pRecObj->close();    // close XREF object<br />     return es;<br /> }<br /> <br /> //Please bear in mind that the above code will retrieve the path name of the copied drawing instead of the original drawing if XLOADCTL is set to 2.<br />

819534890

good good。

wangqxd

我也来学习学习是怎么回事！

rdmen

正学习遍历xref，很好参考

大愚

学习学习   强强

王晶辰

真的很不错，学习到了  哈哈