AbleCommerce Shopping Cart Software

I have received an error while upgrading my ablestore. to 7.0.3

i was upgrading from 7.0.0 and now im on 7.0.2 pre upgrade and getting this error.

[[ConLib:BuyProductDialog]] c:\inetpub\unitedintegral.com 10152\ConLib\Utility\ProductPrice.ascx.cs(271): error CS0117: 'NavigationHelper' does not contain a definition for 'GetEncodedReturnUrl'
[[ConLib:ProductDescriptionTabbed ShowCustomFields="FALSE"]] c:\inetpub\unitedintegral.com 10152\ConLib\Utility\ProductPrice.ascx.cs(271): error CS0117: 'NavigationHelper' does not contain a definition for 'GetEncodedReturnUrl'
[[ConLib:AlsoBoughtPP Orientation="HORIZONTAL" Columns="7" MaxItems="14"]] c:\inetpub\unitedintegral.com 10152\ConLib\Utility\ProductPrice.ascx.cs(271): error CS0117: 'NavigationHelper' does not contain a definition for 'GetEncodedReturnUrl'
[[ConLib:MiniBasket]] c:\inetpub\unitedintegral.com 10152\ConLib\Utility\ProductPrice.ascx.cs(271): error CS0117: 'NavigationHelper' does not contain a definition for 'GetEncodedReturnUrl'
[[ConLib:RecentlyViewed]] c:\inetpub\unitedintegral.com 10152\ConLib\Utility\ProductPrice.ascx.cs(271): error CS0117: 'NavigationHelper' does not contain a definition for 'GetEncodedReturnUrl'
[[ConLib:MoreCategoryItems Caption="Related Items" Orientation="Vertical" MaxItems="8" DisplayMode="Sequential"]] c:\inetpub\unitedintegral.com 10152\ConLib\AddToCartLink.ascx.cs(140): error CS0117: 'NavigationHelper' does not contain a definition for 'GetEncodedReturnUrl'
[[ConLib:Custom\CustomCategoryListPage]] c:\inetpub\unitedintegral.com 10152\ConLib\CategorySearchSidebar.ascx.cs(16): error CS0246: The type or namespace name 'ISearchSidebar' could not be found (are you missing a using directive or an assembly reference?)

I have already finish this step of the 7.0.2 upgrade.
STEP 7) - Custom templates (.aspx)

If you have made copies of the .aspx templates for the purpose of customization, you may get errors after upgrading.

Replace following code:
CommerceBuilder.Services.AbleCommerceHttpModule.RegisterCatalogNode

With the updated code:

CommerceBuilder.Reporting.PageView.RegisterCatalogNode

Did you overwrite the files in the App_Code folder when you did the upgrade- you should have. That is where the GetEncodedReturnUrl() is. It wasn't present in 7.0.0 unless you are using 7.0.0 Build 11659.

where in the app code folder .cs is that function or class in.

Basically its will be file under App_Code folder.