private void btnVendorPayment_Click(object sender, RoutedEventArgs e)
{
VendorPurchases.vendorName = null;
VendorPayment vp = new VendorPayment();
vp.ShowDialog();
}
private void paymentButton_Click(object sender, RoutedEventArgs e)
{
vendorName = textBlockVName.Text;
VendorPayment vp = new VendorPayment();
vp.InputChanged += OnDialogInputChanged;
vp.lblHeading.Visibility = Visibility.Collapsed;
vp.comboBoxVendorName.Visibility = Visibility.Collapsed;
vp.lblName.Visibility = Visibility.Visible;
vp.labelVendorName.Visibility = Visibility.Visible;
vp.Show();
}