private void BeginCombinationProductAddMode()
{
SelecedCombinationProductId = -1;
txtProductReference.Text = string.Empty;
txtCombinationEan13.Text = string.Empty;
txtCombinationUPC.Text = string.Empty;
cddCombinationSupplier.SelectedValue = "-1";
txtWholesalePrice.Text = "1";
txtImpactOnPrice.Text = "1";
txtImpactOnWeight.Text = "1";
txtCombinationInitialStock.Text = "1";
txtCombinationInitialQuantity.Text = "1";
cbIsDefault.Checked = false;
ucColorPicker.SelectedColor = string.Empty;
txtCombinationLocation.Text = string.Empty;
ucCombinationProductLanguage.Visible = false;
ucCombinationProductLanguage.SelectedLanguageID = -1;
btnSaveCombinationProduct.Visible = true;
btnUpdateCombinationProduct.Visible = false;
btnSaveCombinationProductOtherLanguage.Visible = false;
pnlCombinationAttributes.Style.Add(HtmlTextWriterStyle.Display, "none");
pnlCombinationImage.Style.Add(HtmlTextWriterStyle.Display, "none");
}