WPF - How to bind Style's Setter to element's Property?

Question

In, WPF, XAML, I have a Style that's being applied to the items of a ComboBox, I want to get the current item's Content Property but this doesn't seem to work:

<dxe:ComboBoxEdit.Items>
    <Style TargetType="{x:Type dxe:ComboBoxEditItem}">
        <Style.Setters>
            <Setter Property="Content" Value="{Binding Converter={StaticResource CrsNameCvtor}, ConverterParameter={Binding Content,RelativeSource={RelativeSource Self}}}"/>
        </Style.Setters>
    </Style>
</dxe:ComboBoxEdit.Items>

It's Devexpress's ComboBox, please think of it as WPF's default ComboBox. — Dan, Aug 14 '19 at 11:42
And why is the Style defined inside the `Items` tag? That makes no sense. — Clemens, Aug 14 '19 at 11:42
I think you're right on that one! Should put in the Combobox directly I guess. — Dan, Aug 14 '19 at 11:43
And you can't bind a Binding's ConverterParameter. See here: https://stackoverflow.com/q/15309008/1136211 — Clemens, Aug 14 '19 at 11:47
No, that's ok. What I'm trying to do is, I have the content in a format like: "abcd||stuf|stuff", and I'm trying to show it as only "abcd" while keeping the string intact in the VM — Dan, Aug 14 '19 at 11:47
So the converter should just manipulate the Binding's source value? You don't need a ConverterParameter. Just take the `value` argument of the Convert method. — Clemens, Aug 14 '19 at 11:50
Let us [continue this discussion in chat](https://chat.stackoverflow.com/rooms/197925/discussion-between-dan-and-clemens). — Dan, Aug 14 '19 at 11:54

score 2 · Accepted Answer · answered Aug 14 '19 at 11:52

The Style should be assigned to the ComboBox's ItemContainerStyle property, and you don't need to set the Binding's ConverterParameter at all:

<dxe:ComboBoxEdit.ItemContainerStyle>
    <Style TargetType="dxe:ComboBoxEditItem">
        <Setter Property="Content"
                Value="{Binding Converter={StaticResource CrsNameCvtor}}"/>
    </Style>
</dxe:ComboBoxEdit.ItemContainerStyle>

WPF - How to bind Style's Setter to element's Property?

1 Answers1