Question

qt4中连接mysql出现Cannot open include file: 'QSqlError': No such file or directory

qt4中连接mysql数据库头文件中有
#include <QtSql\QSqlDatabase>
#include <QtGui>
#include <QMessageBox>
//#include <QSqlDatabase>
#include <QSqlError>
#include <QSqlQuery>

调用下面函数时
void CfgLog4cxxDialogImpl::open()
{

QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL");
db.setHostName("localhost");
db.setDatabaseName("cbz8600");
db.setUserName("root");
db.setPassword("root");

if(!db.open()){
QMessageBox::critical(0, QObject::tr("Database Error"),
db.lastError().text());

}
//连接成功执行查询
QSqlQuery query;
query.exec("select * from family");

while (query.next()) {
QString name = query.value(2).toString();
QString code = query.value(1).toString();

QMessageBox::information(0,code,name);
}
}
出现错误1>.\cfglog4cxxdialogimpl.cpp(11) : fatal error C1083: Cannot open include file: 'QSqlError': No such file or directory

Answer 1

如果确定有QSqlError的话，在project（生成的.pro文件）文件里添加QT += sql 试试

追问

你好 已经加了 还是有这个错误