Support generic types in DataTemplate.DataType

E.g.:

<DataTemplate DataType="core:Library{core:ShapeStyle}">

[grokys]

There’s no workaround for XAML currently, XAML in general doesn’t support generic types well, so I’m not entirely sure how to add this.

However, you should be able to add DataTemplates with generic types from code, if that would help?

[jpgarza93]

For anyone trying to use generics (String, Double, Int, etc), here is what I did to get it working:

public class GenericsDataTemplate : IDataTemplate
{
    [DataType]
    public Type? DataType { get; set; }

    [Content]
    [TemplateContent]
    public object? Content { get; set; }

    public bool Match(object? data)
    {
        if (DataType == null)
            return true;

        if (data is Type type)
            return DataType == type;

        return false;
    }

    public Control? Build(object? data) => Build(data, null);

    public Control? Build(object? data, Control? existing)
    {
        return existing ?? TemplateContent.Load(Content)?.Result;
    }
}

then in xaml just do this