Application stops working unexpectedly

[baluk]

Hi,

in my app I am reading a file name by opening a QFileDialog and save the filename to a string variable. And then I check for the variable in question of filename returned. I am doing this with an If statement and showing message box if the variable is empty. But when I get to the If statement my program showing a message that "example.exe has stopped working unexpectedly". here is my code

void MainWindow::getFilename()
{
    QMessageBox msgbox;
    msgbox.setText("Please select the file");
    filepath = QFileDialog::getOpenFileName(this, tr("Open File"),"/home",tr("Text files(*.txt)"));
  if(filepath.isEmpty())
      msgbox.exec();
}

void MainWindow::getFilename()
{
    QMessageBox msgbox;
    msgbox.setText("Please select the file");
    filepath = QFileDialog::getOpenFileName(this, tr("Open File"),"/home",tr("Text files(*.txt)"));
  if(filepath.isEmpty())
      msgbox.exec();
}

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I would be grateful for any solution.

Thank You,
Baluk