asdf_gch 发表于 2022-2-17 17:38:01

workingdatabase 获取指针失败

通过com 读取Excel 数据,根据数据在cad画图。
1.读取Excel数据,成功。2.添加图块成功 3.添加图层失败,在workingdatabase 获取指针失败。先是锁定文档,添加图层,再解除锁定。没有报错。在第3步,先锁定文档,再获取workingdatabase指针失败。提示access violation reading .请各位大佬不吝赐教

asdf_gch 发表于 2022-2-18 15:45:01

现在把读excle 注释掉,先添加图层,再添加图块,调试进入获取workingdatabase2失败,db=00000000000000000,static void addlayerblock()   // 添加图层{        ErrorStatus es;        AcDbDatabase *db = NULL;        acDocManager->lockDocument(acDocManager->curDocument());        AcDbLayerTable *playerTable = NULL;        if (!(db = acdbHostApplicationServices()->workingDatabase()))        {                acutPrintf(L"获取workingdata1失败");delete db;                return;        }        if (Acad::eOk != (es = db->getSymbolTable(playerTable, AcDb::kForWrite)))        {                acutPrintf(L"获取workingdata1失败");                return;        }        if (!(playerTable->has(L"轮廓线")))        {                AcDbLayerTableRecord *playerTableR = new AcDbLayerTableRecord;                playerTableR->setName(L"轮廓线");                AcCmColor col;                col.setColorIndex(255);                playerTableR->setColor(col);                playerTable->add(playerTableR);                playerTableR->close();        }        playerTable->close();        delete db;        acDocManager->unlockDocument(acDocManager->curDocument());}static void makeBlock()// 添加图块{        ErrorStatus es; AcDbDatabase *db = NULL;        acDocManager->lockDocument(acDocManager->mdiActiveDocument());        AcGeVector3d nrm(0, 0, 1);        AcDbBlockTable *blockt = NULL;        if (!(db = acdbHostApplicationServices()->workingDatabase()))        {                acutPrintf(L"获取workingdata2失败");                return;        }        if (Acad::eOk != (es = db->getBlockTable(playerTable, AcDb::kForWrite)))        {                acutPrintf(L"获取getBlockTable失败");                return;        }        if (!(blockt->has(L"mM2")))   //添加M2螺纹孔        {                AcDbBlockTableRecord *ptblR = new AcDbBlockTableRecord;                ptblR->setName(L"mM2");                AcDbObjectId pid;                blockt->add(pid, ptblR);                AcGePoint3d ce(1.25, 0, 0);                AcGePoint3d p(0, 0, 0);                AcGePoint3d p0(2.5, 0, 0);                AcDbLine *pl1 = new AcDbLine(p, p0);                pl1->setLayer(L"中心线");                ptblR->appendAcDbEntity(pid, pl1);                ptblR->setOrigin(ce);                pl1->close();                ptblR->close();        }         blockt->close();        acDocManager->unlockDocument(acDocManager->curDocument());}

gzxl 发表于 2022-2-18 16:16:36

直接写
AcDbDatabase* db = acdbHostApplicationServices()->workingDatabase();
非要
AcDbDatabase *db = NULL;
....
if (!(db = acdbHostApplicationServices()->workingDatabase()))
{
    acutPrintf(L"获取workingdata2失败");
    return;
}

自己给自己难受!

asdf_gch 发表于 2022-2-18 16:31:25

gzxl 发表于 2022-2-18 16:16
直接写
AcDbDatabase* db = acdbHostApplicationServices()->workingDatabase();
非要


改成您这种方法,db依然是0,空指针,我查到非模态对话框,获取空指针,改进后使用了锁定文档,但是好像不管用啊

gzxl 发表于 2022-2-18 16:38:47

QQ群:630401507

asdf_gch 发表于 2022-2-22 16:57:15

自己收个尾,在用com 读取Excel时候,选取了多文档模式,导致锁存文档的混乱问题

2499569249 发表于 2022-3-8 10:04:32

本帖最后由 2499569249 于 2022-3-14 18:35 编辑

gzxl 发表于 2022-2-18 16:16
直接写
AcDbDatabase* db = acdbHostApplicationServices()->workingDatabase();
非要

您好 可以把里程标注的插件发我试用下吗 我的邮箱:
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