connect mysql with odbc

Code:

---

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "QtSql"
#include "QLabel"
#include "QMessageBox"
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
void MainWindow::on_pushButton_clicked()
{
    QSqlDatabase n=new QSqlDatabase();
    n->addDatabase("QODBC3","ahm");
    n->setHostName("10.0.0.101");
    n->setDatabaseName("Driver={MySQL ODBC 5.1.8 Driver};DATABASE=ahm;");
    n->setUserName("ahm");
    n->setPassword("ahmdtcahm");
    n->setPort(3306);
 
    /*if (!n->open()) {
 
        QMessageBox::critical(0, QObject::tr("Database Error"),
 
        n->lastError().text());
    }*/
    bool cek=n->open();
    if(cek==true)
    {
        QLabel *l=new QLabel();
        l->setText("connect");
        l->show();
    }
    else
    {
        QLabel *l=new QLabel();
        l->setText("can't connect");
        l->show();
 
    }
}

---

and output is can't connect...how can i solve this problem???

Are ODBC correctly configured? What is the Error Message?

As written your code won't even compile. At line 22: you try to treat a pointer to an object as an actual object. At line 23: QSqlDatabase::addDatabase() is a static method and you need to use it correctly (as in the examples in the documentation or this site). Try the SQL Widget Mapper Example.