Develop Reference

ContentPresenter with ContentTemplateSelector inside an ItemTempate of an ItemsControl

So, I have an ItemsControl with an ItemTemplate to visualize the items in it's ItemsSource.
This Template is a DataTemplate with some controls in it.
<ItemsControl ItemsSource="{Binding Items}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock/>
<TextBlock/>
<!-- Content depending on item type -->
<ContentPresenter Content="{Binding}" ContentTemplateSelector="{StaticResource TemplateSelector}"/>
<TextBlock/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
The items in the ItemsSource can be of different types. Most of the properties of the different types are the same but some properties are different. So I want to put the common content directly inside the DataTemplate but for the content that differs I want to have some kind of placeholder that displays only type-specific content.
So I tried a ContentPresenter with a ContentTemplateSelector. But this does not work. When I set the Content, the TemplateSelector is never called and the name of the underlying viewmodel is displayed. When I do not set the Content, the TemplateSelector is called, but the item in the SelectTemplate function is null.
I do not want to make the whole DataTemplate for each DataType because most of the content is the same and I would have much duplicate code.

You do not need a DataTemplateSelector.
Just set the DataType of different DataTemplates in the ItemsControl's Resources. The DataTemplates would automatically be selected according to the type of the item.
<ItemsControl ItemsSource="{Binding Items}">
<ItemsControl.Resources>
<DataTemplate DataType="{x:Type local:Item1}">
<TextBlock Text="{Binding Item1Property}"/>
</DataTemplate>
<DataTemplate DataType="{x:Type local:Item2}">
<TextBlock Text="{Binding Item2Property}"/>
</DataTemplate>
</ItemsControl.Resources>
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock ... />
<ContentPresenter Content="{Binding}"/>
<TextBlock ... />
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>

How to represent data in wpf with list collection with inner list

How can i represent my collection(list) of Attributes when every Attribute contains his name and list of values? Inner lists(values) usually have different lengths. Im using wpf.
I was trying to use DataGrid but cant bind collection properly

You can use ItemsControl with ItemTemplate property set to the DataTemplate with another ItemsControl, like in the following:
> <ItemsControl ItemsSource="{Binding OuterList}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding Name}" />
<ItemsControl ItemsSource="{Binding InnerList}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>

How to create a wpf template with nested datatemplate (datatemplate in datatemplate)

I'm totaly new to wpf. I try to create a nested datatemplate like this layout (datatemplate inside another datatemplate). I managed to create a datatemplate and to connect to "Object A" in an ObservableCollection, which worked really well. Now I need to have a nested ObservableCollection in each Object A to display Object B and Object C in columns. But I don't really know how to do that and can't find examples.
Maybe anyone could give me a hint?
Thanks and regards,
Marlene

Assuming you're using a ListView or ListBox to display a collection of Object A (lets call it ObjectACollection), and that Object A has properties named (in this example) ObjectBCollection and ObjectCCollection you could do something like this:
<UserControl xmlns:namespaceA="clr-namespace:MyProj.Models.ObjectANamespace"
xmlns:namespaceB="clr-namespace:MyProj.Models.ObjectBNamespace"
xmlns:namespaceC="clr-namespace:MyProj.Models.ObjectCNamespace" >
<ListBox ItemsSource="{Binding ObjectACollection}">
<ListBox.ItemTemplate>
<DataTemplate DataType="namespaceA:ObjectA">
<StackPanel Orientation="Horizontal">
<ListBox ItemsSource="{Binding ObjectBCollection}">
<ListBox.ItemTemplate>
<DataTemplate DataType="namespaceB:ObjectB">
<TextBlock Text="{Binding ObjectBProperty}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<ListBox ItemsSource="{Binding ObjectCCollection}">
<ListBox.ItemTemplate>
<DataTemplate DataType="namespaceC:ObjectC">
<TextBlock Text="{Binding ObjectCProperty}"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</UserControl>

Tile Grid with Bindings?

OK, what I'm trying to do is fairly simple :
I'm getting a list of images (using bindings) which I'm trying to display in a table-like grid (like 3 images per row)
How can this be done?
<ListBox.ItemTemplate>
<DataTemplate>
<Image Height="100" Width="100" Margin="12,0,9,0" Source="{Binding AlbumArt}"/>
</DataTemplate>
</ListBox.ItemTemplate>
This way, the images are property display, but not the way I want them to - they are display one below the other and not like :
A B C
D E F
G H I
How can this be done? Any ideas?

A great solution would be using UniformGrid with its columns property and ItemsControl.
Example:
<ItemsControl ItemsSource="{Binding AlbumArt}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Columns="3"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Height="100" Width="100" Margin="12,0,9,0" Source="{Binding}"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
This way you will get the desired result. Read more about UniformGrid here: MSDN
The reason why your solution does not work, is that Listbox panel puts items one under another, whereas UniformGrid puts them from left to right, until there is available space or has hit the columns limit and then goes down the row.

You can use two StackPanels, one with verticle orientation and one with horizontal. Here's your code edited to include them:
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Verticle">
<StackPanel Orientation="Horizontal">
<Image Height="100" Width="100" Margin="12,0,9,0" Source="{Binding AlbumArt}"/>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>

Using * sizing in a data template WPF

I am trying to set a * height property in an item template but I keep getting the error
'50*' string cannot be converted to Length.
Im not sure if what Im wanting to do is possible.
Please let me know if you need anymore information.
Heres my Xaml:
<ItemsControl Name="lstMain" ItemsSource="{Binding Sections}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<GroupBox Header="{Binding Section.SectionName}" Height="50*">
<StackPanel>
<ItemsControl ItemsSource="{Binding SubSections}" ItemTemplate="{StaticResource BinderTemplate}" />
</StackPanel>
</GroupBox>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>

the point is that Height is a Double data type and not a GridLength, such as grid rows and columns are.
Only GridLength supports the star size.