I'm trying to design a horizontal stack of UserControls. I have a UserControl named MiniControl and an ObservableCollection<MiniControl> in my ViewModel named MiniVideos. In the Window I'm trying to put all together I have this code:
<ItemsControl x:Name="items" Margin="5" ItemsSource="{Binding Path=MiniVideos}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" Background="LightGray"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<ContentPresenter />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
When I run the code, it is not working as expected and I have the following error in output:
System.Windows.Data Error: 26 : ItemTemplate and ItemTemplateSelector are ignored for items already of the ItemsControl's container type; Type='MiniControl'.
Any idea?
Related
I am trying to create a custom MessageBox with variable number of buttons, this number being equal to the Count of ItemsSource. The buttons are to be placed in a UniformGrid. ItemsSource of ButtonView is assigned to ObservableCollection Buttons. Buttons.Count is not recognized by the code. How could I correctly assign UniformGrid Columns value?
<ItemsControl Grid.Row="2" x:Name="ButtonView">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Columns="{Binding Buttons.Count}">
</UniformGrid>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate DataType="Button">
<Button Margin="2" Content="{Binding Content}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
Set the Rows property instead of Columns:
<ItemsPanelTemplate>
<UniformGrid Rows="1"/>
</ItemsPanelTemplate>
what steps must be done to make a user control, to work in such order:
<local:MyUserControl ItemsSource="{Binding Items}">
<local:MyUserControl.Items>
<local:MyUserControl.Item Name="{Binding Name}"/>
</local:MyUserControl.Items>
</local:MyUserControl>
I know that for ItemsSource I need to create DependencyProperty, but what for the part which is inside MyUserControl.
Example:
Look below is an example how I used to do it.
This is called MyUserControl
<UserControl>
<Grid>
<ItemsControl ItemsSource="{Binding Items}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Button Content="{Binding Name}" Margin="3,3,3,3"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</Grid>
</UserControl>
MainPage:
<local:MyUserControl />
As you can see in this scenario, MyUserControl is not universal, it can be used properly ONLY if I have ItemsSource called Items, and inside of it there is a property called Name.
My Intention is to create flexible MyUserControl.
Thanks in advance.
I found this solution Using MouseDragElementBehavior with an ItemsControl and Canvas by Jörg Reichardt. But it doesn't work for me.
This is my code:
<ItemsControl ItemsSource="{Binding CardCollection}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<Canvas Background="White" AllowDrop="True" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<ContentControl Content="{Binding}">
<i:Interaction.Behaviors>
<is:MouseDragElementBehavior ConstrainToParentBounds="True" />
</i:Interaction.Behaviors>
</ContentControl>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
The items are shown on the canvas but cannot be dragged or dropped. I create new items for the cardCollection in the viewmodel and the cardCollection is updated to the model via mvvm propertynotifychanged.
The ItemsControl defined below is filled with string[] WeekDays. The DataTemplate defined for ItemsControl.ItemTemplate doesn't work, i.e. the week day items are not filled with red background. How do I fix this? Thanks.
...
<ItemsControl
Grid.Row="1"
Margin="20,0,0,0"
ItemsSource="{Binding Path=WeekDays}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Rows="1" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Background="Red" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
...
Note: string[] WeekDays is a dependency property of this control. I am not sure if this information might be relevant to finding the solution.
You need to bind the TextBox's Text property to something in order it to work. So, since the data context of the data template is the string itself the binding should be like this:
<DataTemplate>
<TextBlock Text="{Binding}" Background="Red" />
</DataTemplate>
Is there a way to populate the Silverlight toolkit's WrapPanel via binding to an ObservableCollection? All the examples I've seen so far, including the toolkit example itself, either populate the WrapPanel programmatically or by explicitly adding each item in XAML.
Thanks for your help!
EDIT: Following Geert van Horrik's advice I tried using an ItemsControl to load the WrapPanel via binding. This is the XAML:
<ScrollViewer VerticalScrollBarVisibility="Auto"
Height="440"
Margin="0,12,0,0">
<ItemsControl ItemsSource="{Binding SelectionContent}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Border BorderThickness="1"
CornerRadius="4"
BorderBrush="{Binding BorderBrush}">
<toolkit:GestureService.GestureListener>
<toolkit:GestureListener Tap="OnWrapPanelTapped"
DoubleTap="OnWrapPanelDoubleTapped" />
</toolkit:GestureService.GestureListener>
<Image Source="{Binding ImageSource}"
MaxHeight="48"
MaxWidth="48"
Margin="16" />
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ScrollViewer>
SelectionContent is an ObservableCollection present in this UserControl's code behind. It consists of SelectionItem object, which implements INotifyPropertyChanged and exposes 2 public properties - ImageSource and BorderBrush.
I'm setting the DataContext for the UserControl in its constructor to SelectionContent. But this isn't working and the WrapPanel does not display anything.
You should use an ItemsControl. Then, you can set the WrapPanel as items panel.
<ItemsControl ItemsSource="{Binding MyItemsSource}">
<ItemsControl.ItemsPanel>
<WrapPanel />
</ItemsControl.ItemsPanel>
</ItemsControl>