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Editorial Team
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Asked: 2026-05-28T04:17:27+00:00

I will have a 7 small shopping lists and then one big containing all

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I will have a 7 small “shopping lists” and then one big containing all the items from the 7 small ones.

Is it possible to use databind and observablecollection so whatever is added/removed/changed from the small lists are updated in the big list?

public ObservableCollection<ShopItem> MondayShopList{ get; set; }
public ObservableCollection<ShopItem> TuesdayShopList{ get; set; }
public ObservableCollection<ShopItem> WedensdayShopList{ get; set; }
public ObservableCollection<ShopItem> ....
public ObservableCollection<ShopItem> TotalShopList { get; set; }
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1 Answer

  1. Editorial Team

    i see 3 alternatives for you…

    1. implement a composite ObservableCollection. if there isn’t such a thing out there, you can build one by implementing INotifyCollectionChanged
    2. load all items into the total list and respond yourself to the collection changed events of the dayweek collections and make updates to the complete collection
    3. perform a small architectural change and attach weekday information to the ShopItem. now you can keep them all in one list and display filtered sections of the big list.
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