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Lesson 34 - E-shop in ASP.NET Core MVC - Finishing the E-shop

In the previous lesson, E-shop in ASP.NET Core MVC - Editing Orders 2 - Customer, we allowed the customer details of an order to be edited. In today's ASP.NET Core tutorial, we're going to continue with managing order products and complete our e-shop :)

Product Management

We kept probably the most challenging part of order administration for the end - product management. In this section, the administrator will be able to change the quantity of individual products, remove them from the order, or add others. As before, we'll try to make the most of the code we have already written. The corresponding part of the form will look like this:

E-shop order product administration in ASP.NET MVC

Before We Start...

In our view, we're also going to use the FinalPrice property of the order. However, its value must be recalculated every time the order is changed and not just when the order is completed as before. Therefore, I recommend to perform the calculation somewhere at the repository level, so that we won't forget to recalculate it somewhere. For example, we could rewrite the Update() method in EOrderRepository:

public override void Update(EOrder entity)
{
    var setting = accountingSettingRepository.FindSettingByDate(entity.Issued ?? DateTime.UtcNow);
    if (setting != null)
    {
        entity.FinalPrice = entity.ProductEOrders.Sum(x => x.Quantity * x.Product.Price);
        entity.FinalPrice = (int)Math.Round((double)entity.FinalPrice * (setting.Vat / 100.0 + 1));
    }
    base.Update(entity);
}

ViewModel Edit

In order to allow the administrator to add any product to the order, we need to pass a list of products to the view. Let's expand OrderEditViewModel:


 

...End of the preview...

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We'll finish the order editing by e-shop administrators in ASP.NET Core MVC. We'll manage order products and update data in background using AJAX.

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