private void delMonitor_Click(object sender, EventArgs e)
{
ItemsDatabase db = new ItemsDatabase();
var row = softwareDataGrid.CurrentCell.RowIndex;
string itemID = hardwareDataGrid.Rows[row].Cells[3].Value.ToString();
Monitor monitor = new Monitor(itemID, "", 0.0, 0.0, "", "");
db.DeleteMonitor(monitor);
MessageBox.Show("Izdelek izbrisan!");
List <Monitor> monitors = new List <Monitor>();
monitors = db.ReadMonitors();
monitorDataGrid.DataSource = monitors;
}