private void OnCheckButtonCommand(object param)
{
_excel.CheckIfDownloaded();
if (_excel.IsDownloaded)
{
if (MessageBox.Show("The spreadsheet is already downloaded", "Would you like to replace the file?", MessageBoxButton.YesNo, MessageBoxImage.Warning) == MessageBoxResult.Yes)
{
_excel.DeleteExisting();
_excel.DownloadUrl("https://www.asx.com.au/asx/research/ASXListedCompanies.csv");
}
_excel.LoadRange(4, 1);
}
}