如何使用方法解决违规错误
我使用 getAt() 方法遇到了如此奇怪的违规错误。 我按以下顺序使用该方法:
OdDbBlockTablePtr w_kOdBlockTablePtr ;
bool lbCreateDefaults = false;
OdDb::MeasurementValue lkMeasurement = OdDb::kEnglish;
OdDbDatabasePtr pDb;
// Datenbank initialisieren
pDb = g_ExSystemServices.createDatabase(lbCreateDefaults,
lkMeasurement);
// TABLE - Hold Ptr
w_kOdBlockTablePtr = pDb->getBlockTableId().openObject(OdDb::kForWrite);
const wchar_t AcadBlockModelSpace[] = L "*MODEL_SPACE";
wstring lsModelSpace(AcadBlockModelSpace);
w_kOdModelSpaceBlockRecPtr = GetTableRecordIdFromName(lsModelSpace, (OdDbSymbolTablePtr&)w_kOdBlockTablePtr).safeOpenObject(OdDb::kForWrite);
OdDbObjectId K_TeighaClass::GetTableRecordIdFromName(wstring& psName, OdDbSymbolTablePtr& pkTablePtr)
{
OdDbObjectId lkId;
try {
OdString lsOdName = psName.c_str();
lkId = pkTablePtr->getAt(lsOdName);
}
catch (OdError& err)
{
DoOdError(err, NULL, NULL);
}
return lkId;
}
如果有人可以帮助我,我将非常感激。 提前致谢
I am getting such a weird violation error by using the getAt() method.
I use the method in this order:
OdDbBlockTablePtr w_kOdBlockTablePtr ;
bool lbCreateDefaults = false;
OdDb::MeasurementValue lkMeasurement = OdDb::kEnglish;
OdDbDatabasePtr pDb;
// Datenbank initialisieren
pDb = g_ExSystemServices.createDatabase(lbCreateDefaults,
lkMeasurement);
// TABLE - Hold Ptr
w_kOdBlockTablePtr = pDb->getBlockTableId().openObject(OdDb::kForWrite);
const wchar_t AcadBlockModelSpace[] = L "*MODEL_SPACE";
wstring lsModelSpace(AcadBlockModelSpace);
w_kOdModelSpaceBlockRecPtr = GetTableRecordIdFromName(lsModelSpace, (OdDbSymbolTablePtr&)w_kOdBlockTablePtr).safeOpenObject(OdDb::kForWrite);
OdDbObjectId K_TeighaClass::GetTableRecordIdFromName(wstring& psName, OdDbSymbolTablePtr& pkTablePtr)
{
OdDbObjectId lkId;
try {
OdString lsOdName = psName.c_str();
lkId = pkTablePtr->getAt(lsOdName);
}
catch (OdError& err)
{
DoOdError(err, NULL, NULL);
}
return lkId;
}
I would really appreciate if someone could help me.
Thanks in advance
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这一点也不奇怪。如果将鼠标悬停在
pkTablePtr
上,您几乎肯定会发现它是nullptr
(或者调试器可能会将其报告为0
)。您的问题中没有足够的信息来说明为什么会出现这种情况,但由于您已经在调试器下运行,您可以浏览代码并找出答案。
顺便说一下,
try
...catch
不会捕获这样的硬错误。为此,您需要__try
...__ except
(仅在 Windows 上支持)。That's not weird at all. If you hover your mouse over
pkTablePtr
, you will almost certainly find that it isnullptr
(or the debugger might report this as0
).There's not enough information in your question to say why this might be, but since you are already running under the debugger you can walk through your code and find out.
try
...catch
won't catch a hard error like this, by the way. For that, you need__try
...__except
(supported on Windows only).