Qt连接QSqlite数据库，使用QTableWidget显示数据总结

Qt连接数据库：

void ConnectDb::onConnectDb()

{

QMessageBox msgBox;

dbconn=QSqlDatabase::addDatabase("QSQLITE");

dbconn.setDatabaseName("E:\\MyJob\\ConnectDb\\testDatabase.db");

if(!dbconn.open())

{

dbconn.close();

QMessageBox::warning(NULL,tr("提示"),tr("打开数据库失败！"),tr("确定"));

}

else

{

msgBox.setText(tr("打开数据库成功"));

msgBox.exec();

}

}

使用QTableWidget显示数据：

void ConnectDb::onShowDb()

{

QSqlQuery query;

int i = 0, j = 0, nColumn, nRow;

query.prepare("select * from testTable");

query.exec();

query.last();

nRow = query.at() + 1;

ui.tableWidget->setRowCount(nRow);

nColumn = ui.tableWidget->columnCount();

query.first();

while(j<nRow)

{

for (i = 0; i<nColumn; i++)

ui.tableWidget->setItem(j, i, new QTableWidgetItem(query.value(i).toString()));

j++;

query.next();

}

dbconn.close();

}