QT6操作mysql方法_增删改查

 mysql数据库搭建相关方法：

MySQL - 随笔分类 - txwtech - 博客园https://www.cnblogs.com/txwtech/category/1973054.htmlMySQL解压版配置方法

MySQL解压版配置方法 - txwtech - 博客园1.下载 https://downloads.mysql.com/archives/community/ 2. 创建my.ini文件。复制如下文档 [mysqld]character-set-servhttps://www.cnblogs.com/txwtech/p/14751496.html搭建好了数据库用MySQLWorkbench打开连接后可以建表

工程代码：

QT操作mysql-qt6-mysql-operation.rar-QT文档类资源-CSDN下载QT操作mysql_qt6_mysql_operation.rarhttps://txwtech.更多下载资源、学习资料请访问CSDN下载频道.https://download.csdn.net/download/txwtech/87266992

通过ODBC连接MySQL数据库

下载ODBC连接器

MySQL :: Download Connector/ODBChttps://dev.mysql.com/downloads/connector/odbc/

 

 安装之后在电脑的搜索栏中输入ODBC即可查看安装后的ODBC

点击添加 

 

点击MYSQL ODBC 8。0 ANSI Driver 

 

 

点击Test是否可以连接数据库。 

核心代码：

void MainWindow_tt::on_pushButton_query_clicked()
{
    QSqlQueryModel *sql_model = new QSqlQueryModel(this);
    sql_model->setQuery("select * from book_info");
    sql_model->setHeaderData(0,Qt::Horizontal,tr("id"));
    sql_model->setHeaderData(1,Qt::Horizontal,tr("书名"));
    sql_model->setHeaderData(2,Qt::Horizontal,tr("书号"));
    sql_model->setHeaderData(3,Qt::Horizontal,tr("价格"));
    //QTableView *view = new QTableView(this);

    ui->tableView ->setModel(sql_model);



}


void MainWindow_tt::on_pushButton_add_clicked()
{
    QString book_name=ui->lineEdit_bookname->text();
    QString book_isbn=ui->lineEdit_booknumber->text();
    QString book_price=ui->lineEdit_bookprice->text();
    //QString sql = "insert into student (id,name,age,math) values (1,'kaw',20,97)";	//书写想要执行的语句
    QString sql =  QString("insert into book_info (book_name,book_ibsn,book_price) values ('%1','%2','%3')").arg(book_name).arg(book_isbn).arg(book_price);
    QSqlQuery query2;	//创建一个QSqlQuery对象
    if(query2.exec(sql)==true)    //执行mysql语句
    {
        QMessageBox::information(this,"提示","添加成功");
        on_pushButton_query_clicked();

    }
    else
    {
        QMessageBox::warning(this,"提示","添加失败");
    }
}


void MainWindow_tt::on_pushButton_delete_clicked()
{
    QSqlQuery query;
    QString id=ui->lineEdit_bookid->text();
    if(id!="")
    {
        QString sql=QString("delete from book_info where id='%1' ").arg(id);
        if(query.exec(sql))
        {
            // db.commit();
            QMessageBox::information(this,"提示"," 删除成功!");
            on_pushButton_query_clicked();

        }
        else
        {
            QMessageBox::information(this,"提示","删除失败!");


        }

    }
    else
    {
          QMessageBox::information(this,"提示"," 请输入id");
    }

}


void MainWindow_tt::on_pushButton_modify_clicked()
{
    //UPDATE tb_courses_new SET course_name='DB',course_grade=3.5 WHERE course_id=2;
      QString id=ui->lineEdit_bookid_2->text();
    int id_int=ui->lineEdit_bookid_2->text().toInt();
    QString modify_type=ui->comboBox_modify_type->currentText();

    QString modify_content=ui->lineEdit_modify_content->text();
    if(id=="")
    {
         QMessageBox::information(this,"提示"," 请输入id");
         return;
    }
    if(modify_content=="")
    {
         QMessageBox::information(this,"提示"," 请输入修改内容");
         return;
    }

    if(modify_type=="书名")
    {
     modify_type="book_name";
    }
    if(modify_type=="书号")
    {
     modify_type="book_ibsn";
    }
    if(modify_type=="价格")
    {
     modify_type="book_price";
    }
    QString sql =  QString("update book_info set %1 ='%2' where id=%3").arg(modify_type).arg(modify_content).arg(id_int);
    QSqlQuery query2;	//创建一个QSqlQuery对象
    if(query2.exec(sql)==true)    //执行mysql语句
    {
        QMessageBox::information(this,"提示","修改成功");
        on_pushButton_query_clicked();

    }
    else
    {
        QMessageBox::warning(this,"提示","修改失败");
    }

工程代码：

QT操作mysql-qt6-mysql-operation.rar-QT文档类资源-CSDN下载QT操作mysql_qt6_mysql_operation.rarhttps://txwtech.更多下载资源、学习资料请访问CSDN下载频道.https://download.csdn.net/download/txwtech/87266992