UWP DataTemplates for multiple item types in ListView

Question

How would I go about implementing this?

Let\'s say this is my model:

public interface IAnimal
{
     string Name { get; }
}
public class Fish : IAnimal
{         


        

Answer 1

The clue is in the error message.

Failed to create a 'Ui.Components.TemplateMatch' from the text 'model:Dog'

Note the 'model:Dog' is coming to your selector as text not a type.

Change your TemplateMatch class TargetType property to string instead of type like this:-

public class TemplateMatch
{
    public string TargetType { get; set; }
    public DataTemplate Template { get; set; }
}

Then change your template selector class to read

public class MyDataTemplateSelector : DataTemplateSelector
{
    public ObservableCollection Matches { get; set; }

    public MyDataTemplateSelector()
    {
        Matches = new ObservableCollection();
    }

    protected override DataTemplate SelectTemplateCore(object item)
    {
        return Matches.FirstOrDefault(m => m.TargetType.Equals(item.GetType().ToString()))?.Template;
    }

    protected override DataTemplate SelectTemplateCore(object item, DependencyObject container)
    {
        return Matches.FirstOrDefault(m => m.TargetType.Equals(item.GetType().ToString()))?.Template;
    }
}

Finally change your xaml to read

The point is to forget trying to pass it to your selector as a type, and pass the typename as a string instead (Full namespace not Xaml namespace).