/// <summary>
    /// Sets currently valid stock information for render.
    /// </summary>
    private void SetStockInformation()
    {
        var selectedVariant = SelectedVariant;

        var selectedSKU = (selectedVariant != null) ? selectedVariant.Variant : SKU;

        // Used in listing.
        if (!UsedInProductDetail)
        {
            switch (selectedSKU.SKUTrackInventory)
            {
            case TrackInventoryTypeEnum.ByProduct:
                RenderStockInformation(selectedSKU.SKUAvailableItems > 0);
                break;

            case TrackInventoryTypeEnum.ByVariants:
                RenderStockInformation(Variants.Exists(variant => variant.Variant.SKUAvailableItems > 0));
                break;

            default:
                RenderStockInformation(true);
                break;
            }
        }
        // Used in product detail.
        else
        {
            // Sku or variant is disabled or variant from given options does not exist.
            if (!selectedSKU.SKUEnabled || ((SelectedVariant == null) && (Variants.Count != 0)))
            {
                lblStockValue.Attributes.Remove("class");
                lblStockValue.Attributes.Add("class", "stock unavailable");
                lblStockValue.Text = GetString("com.variant.notavailable");
            }
            else
            {
                RenderStockInformation((selectedSKU.SKUTrackInventory == TrackInventoryTypeEnum.Disabled) || (selectedSKU.SKUAvailableItems > 0));
            }
        }
    }