QSqlDatabase isopen
I think isOpen doesn't check if connection is still alive. It just returns true ... will be kept alive. See also Detecting QSqlDatabase disconnections., QSqlDatabase db = QSqlDatabase::database(CONNECTION_NAME);. // In this code if /etc/init.d/network stop (network closed) db.isOpen() ...
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 QSqlDatabase isopen 相關參考資料
C++ (Cpp) QSqlDatabase::isOpen Examples - HotExamples
C++ (Cpp) QSqlDatabase::isOpen - 30 examples found. These are the top rated real world C++ (Cpp) examples of QSqlDatabase::isOpen extracted from open ... https://cpp.hotexamples.com Checking database connection using db.isOpen() - Stack ...
I think isOpen doesn't check if connection is still alive. It just returns true ... will be kept alive. See also Detecting QSqlDatabase disconnections. https://stackoverflow.com How to detect QSqlDatabase is still open??? - Qt Centre
QSqlDatabase db = QSqlDatabase::database(CONNECTION_NAME);. // In this code if /etc/init.d/network stop (network closed) db.isOpen() ... https://www.qtcentre.org QSqlDatabase Class | Qt 4.8 - Qt Documentation
bool QSqlDatabase::isOpen() const. Returns true if the database connection is currently open; otherwise returns false. bool QSqlDatabase::isOpenError() const. https://doc.qt.io QSqlDatabase Class | Qt SQL 5.11 - Qt Documentation
bool QSqlDatabase::isOpen() const. Returns true if the database connection is currently open; otherwise returns false . bool QSqlDatabase::isOpenError() ... https://doc.qt.io QSqlDatabase Class | Qt SQL 5.15.0 - Qt Documentation
bool QSqlDatabase::isOpen() const. Returns true if the database connection is currently open; otherwise returns false . bool QSqlDatabase::isOpenError() ... https://doc.qt.io QSqlDatabase Class | Qt SQL 5.6 - Qt Documentation
bool QSqlDatabase::isOpen() const. Returns true if the database connection is currently open; otherwise returns false . bool QSqlDatabase::isOpenError() ... https://doc.qt.io QSqlDatabase Class | Qt SQL 5.8 - Qt Documentation
QSqlDatabase Class. The QSqlDatabase class represents a connection to a database. ... bool, isOpen() const ... bool QSqlDatabase::isOpen() const. Returns ... https://doc.qt.io QSqlDatabase Class | Qt SQL 5.9 - Qt Documentation
bool QSqlDatabase::isOpen() const. Returns true if the database connection is currently open; otherwise returns false . bool QSqlDatabase::isOpenError() ... https://doc.qt.io Qt 4.8: QSqlDatabase Class Reference
bool QSqlDatabase::isOpen () const. Returns true if the database connection is currently open; otherwise returns false. bool QSqlDatabase::isOpenError () const. https://doc-snapshots.qt.io |