NullReferenceException When trying to bind list to ItemsSource

[zer0Ambit1on]

Hello, Just wanna try your awesome nuget, but if i bind ObservableCollection to ItemsSource it generate NRE.

But if List is "Null" app started without exception. Can you help?

[roubachof]

How I can help without example ? I can't 😎

[zer0Ambit1on]

Sorry for long reply public partial class MainPage : ContentPage { public ObservableCollection ImagesArray { get; set; } = new ObservableCollection(); public MainPage() { InitializeComponent(); BindingContext = this; ImagesArray.Add(new MyList() { ImageName = "Image1.png" }); ImagesArray.Add(new MyList() { ImageName = "Image2.png" }); ImagesArray.Add(new MyList() { ImageName = Image3.png" }); ImagesArray.Add(new MyList() { ImageName = "Image4.png" }); ImagesArray.Add(new MyList() { ImageName = "Image5.png" }); ImagesArray.Add(new MyList() { ImageName = "Image6.png" }); ImagesArray.Add(new MyList() { ImageName = "Image7.png" }); ImagesArray.Add(new MyList() { ImageName = "Image8.png" }); ImagesArray.Add(new MyList() { ImageName = "Image9.png" }); ImagesArray.Add(new MyList() { ImageName = "Image10.png" }); } My XAML:

StackLayout> /StackLayout>

[roubachof]

You need to set the ItemHeight property

[zer0Ambit1on]

i have set this value, but all the same it generate exception .

[SarthakGz]

I think Item height property should not be mandatory for vertical layout it should calculate according to content itself.

[roubachof]

nope, this is the whole philosophy of the Sharpnado CollectionView, don't measure it self, specify static height by data template to allow cell reuse. If you measure all, it breaks cell reuse philosophy since you have to make a layout pass for each cell displayed...

[roubachof]

sorry can't do anything with so little information