Question

I remember, some time ago, seeing an example on MSDN of how you could change the Style of a LitViewItem based on the class type of the object in that item.

Can anyone point me in the direction of this example or one like it? I’m converting a file manager and I’d love to use this approach.

Thanks,
Tom P.

EDIT:
OK, I don’t think I described my problem correctly. Let me try code:

public class IOItem
{
}

public class FileItem : IOItem
{
}

public class DirectoryItem : IOItem
{
}

public class NetworkItem : IOItem
{
}

Now, given the above classes can I create a Style that changes based on the class type of the final object? For example:

<Style TargetType="{x:Type FileItem}">
    <Setter Property="Background" Value="Red" />
</Style>
<Style TargetType="{x:Type DirectoryItem}">
    <Setter Property="Background" Value="Green" />
</Style>

Is this possible?

Answer 1

You need to create a StyleSelector and assign it to the ItemContainerStyleSelector property. In the selector, just pick a style based on the type of the item.

class MyStyleSelector : StyleSelector
{
    public override Style SelectStyle(object item, DependencyObject container)
    {
        if (item is FileItem)
            return Application.Current.Resources["FileItemStyle"];
        if (item is DirectoryItem)
            return Application.Current.Resources["DirectoryItemStyle"];
        return null;
    }
}