Hello,

I want to add a category for exist product. How can I do that from the code behide?

This is an example code:

public ProductDisplay AddProduct(ProductDisplay product)
{
    var merchProduct = _productService.CreateProduct(product.Name, product.Sku, product.Price);

    merchProduct.Category = "New Category" ///This line is to set a new category for product.

    merchProduct = product.ToProduct(merchProduct);
    _productService.Save(merchProduct);
    return merchProduct.ToProductDisplay(DetachedValuesConversionType.Editor);
}

After add a new category the category should show in product box: