List<T> to ObservableCollection<T>

Question

List<T> to ObservableCollection<T>

Y a h y a 416

Hi

In my Xamarin app the page is bound to an ObservableCollection<T> but the remote Api is currently returning List<T>. What is the best way to handle this discrepancy? Should I change the backend Api to return ObservableCollection<T>?

Thanks

Regards

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Answer 1

LandLu-MSFT 21

Hello,

Welcome to Microsoft Q&A!

We could easily convert list to observable through:

ObservableCollection<int> myCollection = new ObservableCollection<int>(myList);

Change the int to your object in your case.

Thank you.

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Y a h y a 416 Reputation points

2020-11-25T05:35:34.737+00:00

Hi LandLu

Would such a ObservableCollection auto update when underlying list is updated from remote api? If not should I use another strategy to keep both ObservableCollection and underlying list synched?

As ObservableCollection binds to controls on a Xamarin page, ideally when underlying list is updated ObservableCollection should update too and in turn updating controls on Xamarin page.

Thanks

Regards
LandLu-MSFT 21 Reputation points

2020-11-25T06:12:27.74+00:00
We need to keep the original observable collection and then add item from list one by one like:

myCollection.Clear(); foreach (int item in list) { myCollection.Add(item); }

The list here is from your remote rest api.

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List<T> to ObservableCollection<T>

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