Databases
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    <p>try ObservableCollection:</p> <pre><code>private ObservableCollection&lt;SystemModel&gt; _systems = new ObservableCollection&lt;SystemModel&gt;(); public ObservableCollection&lt;SystemModel&gt; Systems { get { return _systems; } } public SystemListViewModel() { var systems = SystemAPI.Instance.GetSystems(); foreach (var system in systems) { Systems.Add(system); } } </code></pre> <p>and xaml should be:</p> <pre><code>&lt;UserControl x:Name="SystemListScreen"&gt; &lt;ScrollViewer Grid.Row="1"&gt; &lt;ItemsControl x:Name="SystemList" ItemsSource="{Binding Path=Systems}"&gt; &lt;ItemsControl.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;UniformGrid Columns="4"/&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ItemsControl.ItemsPanel&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;Widgets:MultiLineButton partID="{Binding ID}" company="{Binding Company}" typeSorter="{Binding Name}" typeLocation="{Binding Location}" buttonCommand="{Binding DataContext.navigateInspectList, ElementName=SystemListScreen}" buttonCommandParameter="{Binding ItemsSource.ID, ElementName=SystemList}"/&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; &lt;/ScrollViewer&gt; &lt;/UserControl&gt; </code></pre> <p>As chao wang said:</p> <p>remove <code>DataType="SystemModel"</code> because if you're using just one type of DataType as DataTemplate it's not necessary. and the correct syntax is <code>DataType="vm:SystemModel"</code> where vm is defined in a parent tag like : <code>xmlns:vm="clr-namespace:MySolution.MyVmProject.MyFolder"</code></p> <p>also check these:</p> <p>remove <code>ItemsSource.</code> from Bindings inside <code>DataTemplate</code> because it's just wrong.</p> <p>double check all names in bindings because if they're wrong null value is considered during runtime and you never know.</p> <p>check your dataContext make sure <code>UserControl</code> have its DataContext to the correct instance of type dependency object which have Systems in it. and make sure it's remains that way.</p>
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    1. POUsercontrol as datatemplate with bindings
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    1. COIs not working. The Usercontrols are still empty.
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    2. COtry defining dependency property for ID, Company, Location and Name.
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    3. COWhat do you mean exactly with defining dependency property? partID etc. are dependency propertys.
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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