VS编译QT程序调用SQLite数据库研究

环境：win8 + VS2008 +QT4.8.1 + QT Creator2.4.1，QT4.8.1是利用vs2008静态编译的

问题描述：

直接运行QT自带的SQLite操作例子工程tableModel，用QT自带的编译器MinGW编译运行没有问题，但是把QT工程转成VS工程后，用VS编译没有问题，运行的时候调用db.open的时候失败，失败的原因是“diverError=Driver not loaded”

问题解决研究：

1.把QT4.8.1利用vs2008重新静态编译，要求编译的时候把sql和SQlite部分加入，尝试后不行。

2.把plugins文件夹下面的sqldrivers文件夹直接复制到执行程序同级目录里面，尝试后不行。

未完继续研究。。。

参考文章：

http://www.qtcn.org/bbs/simple/?t35292.html

http://blog.csdn.net/shuixin536/article/details/8562639

http://www.qtcentre.org/threads/32585-QT-amp-SQLite-driver-not-loaded

http://stackoverflow.com/questions/5151279/qsqlite-driver-not-loaded-where-to-put-qt-database-driver-plugins

http://stackoverflow.com/questions/32442744/qsqlite-driver-not-loaded

代码例子：

static bool createConnection()

{

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

    db.setDatabaseName(":memory:");

    if (!db.open()) {

        QMessageBox::critical(0, qApp->tr("Cannot open database"),

            qApp->tr("Unable to establish a database connection.n"

                     "This example needs SQLite support. Please read "

                     "the Qt SQL driver documentation for information how "

                     "to build it.nn"

                     "Click Cancel to exit."), QMessageBox::Cancel);

        return false;

    }

    QSqlQuery query;

    query.exec("create table person (id int primary key, "

               "firstname varchar(20), lastname varchar(20))");

    query.exec("insert into person values(101, 'Danny', 'Young')");

    query.exec("insert into person values(102, 'Christine', 'Holand')");

    query.exec("insert into person values(103, 'Lars', 'Gordon')");

    query.exec("insert into person values(104, 'Roberto', 'Robitaille')");

    query.exec("insert into person values(105, 'Maria', 'Papadopoulos')");

    query.exec("create table items (id int primary key,"

                                             "imagefile int,"

                                             "itemtype varchar(20),"

                                             "description varchar(100))");

    query.exec("insert into items "

               "values(0, 0, 'Qt',"

               "'Qt is a full development framework with tools designed to "

               "streamline the creation of stunning applications and  "

               "amazing user interfaces for desktop, embedded and mobile "

               "platforms.')");

    query.exec("insert into items "

               "values(1, 1, 'Qt Quick',"

               "'Qt Quick is a collection of techniques designed to help "

               "developers create intuitive, modern-looking, and fluid "

               "user interfaces using a CSS & JavaScript like language.')");

    query.exec("insert into items "

               "values(2, 2, 'Qt Creator',"

               "'Qt Creator is a powerful cross-platform integrated "

               "development environment (IDE), including UI design tools "

               "and on-device debugging.')");

    query.exec("insert into items "

               "values(3, 3, 'Qt Project',"

               "'The Qt Project governs the open source development of Qt, "

               "allowing anyone wanting to contribute to join the effort "

               "through a meritocratic structure of approvers and "

               "maintainers.')");

    query.exec("create table images (itemid int, file varchar(20))");

    query.exec("insert into images values(0, 'images/qt-logo.png')");

    query.exec("insert into images values(1, 'images/qt-quick.png')");

    query.exec("insert into images values(2, 'images/qt-creator.png')");

    query.exec("insert into images values(3, 'images/qt-project.png')");

    return true;

}

（编辑：李大同）

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