workingdatabase 获取指针失败

asdf_gch

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

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

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

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

QQ群：630401507

asdf_gch

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

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：