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c#entity-frameworkpropertiessetter
EugeneK
EugeneK

Reputation: 75

Entity Framework - Custom logic in property setter

Using an EF, Code First. In my class I have properties Quantity, Price and Amount. In setters of the first 2 properties I want to add logic to calculate amount. This works ok, but when I load entity next time, and Entity Framework fills properties with database values, than this custom logic is implemented too - and this is not good. How do you think is there any to implement custom logic only when user actually changes the value and not during object initialization?

Upvotes: 1

Views: 1892

Answers (2)

Pooja_7601
Pooja_7601

Reputation: 11

create ViewModel Class with 3 Properties

  1. Quantity{get;set}

  2. Price{get;set}

  3. Amount{get;}

Use INotifyPropertyChanged to Notify changes In Property.

public int Quantity
{
     get { return quantity; }
     set
     {
        quantity= value;
        NotifyPropertyChanged("Quantity");
        NotifyPropertyChanged("Amount");
     }
 }

public int Price
{
     get { return price; }
     set
     {
         price= value;
         NotifyPropertyChanged("Price");
         NotifyPropertyChanged("Amount");
     }
}

public long Amount
{
    get { return (Amount*Price); }
}

Change Any Property i.e Quantity or Price, Amount will Automatically Updated with NotifyPropertyChanged

Update Property Logic can be written in Model Class

Upvotes: 1

magos
magos

Reputation: 3511

Try to implement this logic in controller action. Show us some code - it will be easier to find out what kind of logic you'd like to add.

Upvotes: 0

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