How to set ItemsSource in XAML? - wpf

Question

I have set ItemsSource of a ListBox as follows :
<ListBox ItemsSource="{Binding abc}" />
What I want
<ListBox>
<listBox.ItemsSource>
?????????????
<listBox.ItemsSource>
</ListBox>

Answer 1

<Window xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:sys="clr-namespace:System;assembly=mscorlib">
<ListBox>
<ListBox.ItemsSource>
<x:Array Type="sys:String">
<sys:String>1st item</sys:String>
<sys:String>2nd item</sys:String>
</x:Array>
<ListBox.ItemsSource>
</ListBox>
</Window>

Answer 2

<ListBox>
<listBox.ItemsSource>
<Binding Path = "abs" />
<listBox.ItemsSource>
</ListBox>

Answer 3

Xamarin Example
If you wandered into this page looking for a Xamarin example (the question seems generic to XAML), then you can try -
<Picker x:Name="picker"
Title="Select a monkey"
TitleColor="Red">
<Picker.ItemsSource>
<x:Array Type="{x:Type x:String}">
<x:String>Baboon</x:String>
<x:String>Capuchin Monkey</x:String>
<x:String>Blue Monkey</x:String>
<x:String>Squirrel Monkey</x:String>
<x:String>Golden Lion Tamarin</x:String>
<x:String>Howler Monkey</x:String>
<x:String>Japanese Macaque</x:String>
</x:Array>
</Picker.ItemsSource>
</Picker>
From -
https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/picker/populating-itemssource#populating-a-picker-with-data
This uses Picker as an example, but the ItemsSource syntax is interchangeable based on the outer control, like so -
<ListView>
<ListView.ItemsSource>
<x:Array Type="{x:Type x:String}">
<x:String>mono</x:String>
<x:String>monodroid</x:String>
<x:String>monotouch</x:String>
<x:String>monorail</x:String>
<x:String>monodevelop</x:String>
<x:String>monotone</x:String>
<x:String>monopoly</x:String>
<x:String>monomodal</x:String>
<x:String>mononucleosis</x:String>
</x:Array>
</ListView.ItemsSource>
</ListView>

Answer 4

#HighCore, #DanPazey, and #Vishal:
In fact, the markup binding syntax may prove to be useful and even necessary.
Not to mention multibinding, consider the following.
Suppose you need to bind your ListBox to CollectionViewSource (for sorting or else). Like this:
<Window.Resources>
<CollectionViewSource x:Key="abc_CVS_Key" Source="{Binding abc}" />
</Window.Resources>
<ListBox ItemsSource="{Binding Source={StaticResource abc_CVS_Key}}">
</ListBox>
You may want then, for technical reasons, to limit a scope of the CVS resource to only the ListBox in question.
If you write down ItemsSource binding in an attribute
<ListBox ItemsSource="{Binding Source={StaticResource abc_CVS_Key}}">
<ListBox.Resources>
<CollectionViewSource x:Key="abc_CVS_Key" Source="{Binding abc}" />
</List.Resources>
</ListBox>
your code will compile, but runtime your program will not find your abc_CVS_Key resource key, because the resource has been defined later in code. You need to define the resource before you refer to it in ListBox' ItemsSource binding. Like this:
<ListBox>
<ListBox.Resources>
<CollectionViewSource x:Key="abc_CVS_Key" Source="{Binding abc}" />
</List.Resources>
<ListBox.ItemsSource>
<Binding Source="{StaticResource abc_CVS_Key}" />
</ListBox.ItemsSource>
</ListBox>
This code compiles and executes OK.