ItemsControl ItemTemplate Binding
Are you sure the code you posted here IS the code you use in your solution? Because, this code works for me :
XAML
<ItemsControl ItemsSource="{Binding}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<StackPanel>
<TextBlock Text="{Binding OwnerData.OwnerName}"></TextBlock>
<TextBlock Text="{Binding Credit}" />
</StackPanel>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
Window's Loaded Event
ObservableCollection<ForDisplay> items = new ObservableCollection<ForDisplay>();
for (int i = 0; i < 10; i++)
{
items.Add(new ForDisplay() { OwnerData = new Owner() { OwnerId = i + 1, OwnerName = String.Format("Owner #{0}", i + 1) }, Credit = i + 1 });
}
DataContext = items;
Wonko the Sane
Just another geek hoping to inherit the Earth. #SOreadytohelp
Updated on July 09, 2022Comments
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Wonko the Sane almost 2 years
In WPF4.0, I have a class that contains other class types as properties (combining multiple data types for display). Something like:
public partial class Owner { public string OwnerName { get; set; } public int OwnerId { get; set; } } partial class ForDisplay { public Owner OwnerData { get; set; } public int Credit { get; set; } }
In my window, I have an ItemsControl with the following (clipped for clarity):
<ItemsControl ItemsSource={Binding}> <ItemsControl.ItemTemplate> <DataTemplate> <local:MyDisplayControl OwnerName={Binding OwnerData.OwnerName} Credit={Binding Credit} /> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl>
I then get a collection of display information from the data layer, and set the
DataContext
of theItemsControl
to this collection. The "Credit" property gets displayed correctly, but the OwnerName property does not. Instead, I get a binding error:Error 40: BindingExpression path error: 'OwnerName' property not found on 'object' ''ForDisplay' (HashCode=449124874)'. BindingExpression:Path=OwnerName; DataItem='ForDisplay' (HashCode=449124874); target element is 'TextBlock' (Name=txtOwnerName'); target property is 'Text' (type 'String')
I don't understand why this is attempting to look for the OwnerName property in the ForDisplay class, rather than in the Owner class from the ForDisplay OwnerData property.
Edit It appears that it has something to do with using the custom control. If I bind the same properties to a
TextBlock
, they work correctly.<ItemsControl ItemsSource={Binding}> <ItemsControl.ItemTemplate> <DataTemplate> <StackPanel> <local:MyDisplayControl OwnerName={Binding OwnerData.OwnerName} Credit={Binding Credit} /> <TextBlock Text="{Binding OwnerData.OwnerName}" /> <TextBlock Text="{Binding Credit}" /> </StackPanel> </DataTemplate> </ItemsControl.ItemTemplate> </ItemsControl>
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Wonko the Sane almost 14 yearsI think it has something to do with the custom control. See edit of question.