[原创]executeInApplicationContext及appContextNewDocument

luowy

昨天看了2个帖子，都是关于executeInApplicationContext的，初初觉得这个比较麻烦，但后来发现并不那么神秘。
以下是源码：

1. static void RaLfAATest_sss(void)
2. {
3.   Acad::ErrorStatus es;
4.   AcDbDatabase *pNewDB = creatNewDB();//根据函数返回新建数据库指针
5.   
6.   if ( pNewDB == NULL )
7.   {
8.    acutPrintf( L"Failed To Create A New DataBase!");
9.    delete pNewDB;
10.    return;
11.   }
12.   AcApDocument *pNewDoc = acDocManager->document( pNewDB );//获取当前数据库的文档指针
13.   es = acDocManager->lockDocument( pNewDoc );//重要，锁定新建文档
14.   
15.   if ( es != Acad::eOk )
16.   {
17.    acutPrintf(L"Failed to Lock the Document Associated with the New DataBase!" );
18.    delete pNewDB;
19.    return;
20.   }//状态判断
21.   AcDbBlockTable *pBT = NULL;
22.   es = pNewDB->getBlockTable( pBT, AcDb::kForRead );
23.   if ( es != Acad::eOk )
24.   {
25.    acutPrintf(ACRX_T("Failed to Get the BlockTable in the New DataBase! \nError code: %s"), acadErrorStatusText( es ) );
26.    delete pNewDB;
27.    return;
28.   }//状态判断
29.   AcDbBlockTableRecord *pBTR = NULL;
30.   es = pBT->getAt( ACDB_MODEL_SPACE, pBTR, AcDb::kForWrite );
31.   if ( es != Acad::eOk )
32.   {
33.    acutPrintf(ACRX_T("Failed to Get the ModalSpace in BlockTableRecord in the New DataBase! \nError code: %s"), acadErrorStatusText( es ) );
34.    pBT->close();
35.    delete pNewDB;
36.    return;
37.   }//状态判断
38.   pBT->close();
39.   AcDbLine *pLine = new AcDbLine( AcGePoint3d(0,0,0), AcGePoint3d(100,100,100) );
40.   es = pBTR->appendAcDbEntity( pLine );
41.   if ( es != Acad::eOk )
42.   {
43.    acutPrintf(ACRX_T("Failed to Get the ModalSpace in BlockTableRecord in the New DataBase! \nError code: %s"), acadErrorStatusText( es ) );
44.    pBT->close();
45.    pBTR->close();
46.    pLine->close();
47.    delete pNewDB;
48.    return;
49.   }//状态判断
50.   pLine->close();
51.   pBTR->close();
52.    
53.   acDocManager->unlockDocument( pNewDoc );//对新数据库操作完毕，及时释放锁定的文档
54.   pNewDoc->transactionManager()->flushGraphics();//刷新文档，似乎没用
55. }
57. AcDbDatabase *creatNewDB()
58. {
59. Acad::ErrorStatus es;
60. AcDbDatabase* pNewDb=NULL;
61. static ACHAR pData[] =L"acad.dwt";
62. acDocManager->executeInApplicationContext(CreateDoc,(void *)pData);
63. int docCount = acDocManager->documentCount();
64. AcApDocument* npDoc;
65. AcApDocumentIterator *pDocItr = acDocManager->newAcApDocumentIterator();
66. //获取新建立文档的指针
67. for ( int i = 0 ; !pDocItr->done(); pDocItr->step(), i++ )
68. {
69.   if ( i == docCount-1 )
70.   {
71.    npDoc = pDocItr->document();
72.    break;
73.   }
74. }
75. delete pDocItr;
77. pNewDb = npDoc->database();//获取新建立文档的数据库指针
78. if(!pNewDb) return  NULL; //如果创建失败，数据库为NULL，我认为这个可以省略
79. return  pNewDb;
80. }
81. void CreateDoc( void *pData)
82. {
83. Acad::ErrorStatus es;
84. AcApDocument* pDoc = acDocManager->mdiActiveDocument(); //记录当前文档
86. if (acDocManager->isApplicationContext())
87. {
88.   es = acDocManager->appContextNewDocument((const ACHAR *)pData);
89.   es = acDocManager->activateDocument( pDoc );//这里将文档切换回原来的文档，以便该文档继续执行代码
90. }
91. }

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cad新学生

谢谢！最近正研究不明白这呢！强顶！

cad新学生

可是Lz为甚麽创建的图形并不显示出来，保存后再打开才显示？能不能打开dwg文件读写数据库后会立即显示图形？

luowy

哎，剩下的你去琢磨吧，我已经研究了1天了

cad新学生

哦，呵呵！还是谢谢你！

wyh881023

很强啊 困扰了我好久啊

ws_ong123

c:\Users\Administrator\Documents\Visual Studio Projects\zcapp50\acrxEntryPoint.cpp(210): error C2664: “AcApDocManager::executeInApplicationContext” : 不能将参数 1 从“void (void)”转换为“void (__cdecl *)(void *)”

ws_ong123

acDocManager->executeInApplicationContext(CreateDoc,(void*)pData);

homoko

ws_ong123 发表于 2011-11-21 20:41
c:\Users\Administrator\Documents\Visual Studio Projects\zcapp50\acrxEntryPoint.cpp(210): error C2664 ...

查资料到此处，解决此问题的方法是把CreateDoc这个函数设置为静态函数即可