Unable to create instance of NopEngine

Question

I am creating a new theme in nopcommerce,
I want to print all categories in view,

I have wrote follwing code to retrieve all subcategories within a cartegory,
This call(on line 2) fails with Object reference not set to instance of onject error.

var _engine = new NopEngine();
var categoryService = _engine.Resolve<ICategoryService>();
var L1Categories = from p in categoryService.GetAllCategoriesByParentCategoryId(24)
                    where (p.Deleted==false)
                    select p;

http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-do-i-fix-it — Soner Gönül, Sep 05 '15 at 11:00
@SonerGönül My code is valid and it is used in same way in other modules of nopcommerce — Nitin Sawant, Sep 05 '15 at 11:05
In which location of nopcommerce you have written this portion of the code. Nop engine initialisation only happen at global app start event. Usually, no need to set it again. — Jeyara, Sep 06 '15 at 22:57

score 4 · Accepted Answer · answered Sep 14 '15 at 09:25

4

You should use the following code to resolve ICategoryService:

var categoryService = EngineContext.Current.Resolve<ICategoryService>();

Do not forget to add appropriate "using" directives

answered Sep 14 '15 at 09:25

Andrei M

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Unable to create instance of NopEngine

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