Declare array of array in xaml

Question

I'm trying to use an inline data source for a data grid, and obviously XAML supports array of builtin types with x:Array, but when I tried to declare a nested array, tried a few ways but none of them works.

<x:Array Type="{x:Type Array}">
    <x:Array Type="{x:Type x:String}">
        <x:String>aaa1</x:String>
        <x:String>aaa2</x:String>
    </x:Array>
    <x:Array Type="{x:Type x:String}">
        <x:String>aaa9</x:String>
        <x:String>aaa10</x:String>
    </x:Array>
</x:Array>

This wont work either:

<x:Array Type="{x:Type {x:Array Type={x:Type String}}">

" A Type parameter value does not need to use an x:Type markup extension;" Have you tried to write Type="{x:Array}"? — rebecca
– rebecca, Commented Oct 13, 2017 at 10:07
@Rebecca yes I tried it, it compiles ok but nothing shows in the listview — fluter
– fluter, Commented Oct 13, 2017 at 10:11
Its work for me in Xamarin.Forms application. Xamarin.Forms xaml colors array. — M. Hamza Rajput
– M. Hamza Rajput, Commented Jan 17, 2019 at 20:10

mm8 · Accepted Answer · 2017-10-13 10:11:07Z

13

Try this:

<x:Array xmlns:s="clr-namespace:System;assembly=mscorlib" x:Key="array" Type="{x:Type s:Array}">
    <x:Array Type="{x:Type s:String}">
        <s:String>aaa1</s:String>
        <s:String>aaa2</s:String>
    </x:Array>
    <x:Array Type="{x:Type s:String}">
        <s:String>aaa9</s:String>
        <s:String>aaa10</s:String>
    </x:Array>
</x:Array>

Sample usage:

<ItemsControl ItemsSource="{StaticResource array}">
    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <ItemsControl ItemsSource="{Binding}">
                <ItemsControl.ItemTemplate>
                    <DataTemplate>
                        <TextBlock Text="{Binding}" />
                    </DataTemplate>
                </ItemsControl.ItemTemplate>
            </ItemsControl>
        </DataTemplate>
    </ItemsControl.ItemTemplate>
</ItemsControl>

answered Oct 13, 2017 at 10:11

mm8

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4 Comments

fluter Over a year ago

This wont compile :(

mm8 Over a year ago

It surely does - in WPF. Which is the tag you have marked your question with.

fluter Over a year ago

Ok, vs just failes with value cannot be null, I will try again.

mm8 Over a year ago

Copy the array above into <Window.Resources>. It works for me.

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