Make WPF ComboBoxes fill a whole column width

Question

I\'m having problems making a ComboBox stretch to fill the whole column width in a GridViewColumn. It should also resize when the column is resized.

Answer 1

Try setting the Style of the ListViewItem. I also removed your StackPanel.

<ListView x:Name="MyListView" Margin="0,106,0,0">
    <ListView.Resources>
        <Style TargetType="ListViewItem">
            <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
        </Style>
    </ListView.Resources>

    <ListView.View>
        <GridView>
            <GridViewColumn Header="Num" Width="170">
                <GridViewColumn.CellTemplate>
                    <DataTemplate>
                        <ComboBox />
                    </DataTemplate>
                </GridViewColumn.CellTemplate>
            </GridViewColumn>
        </GridView>
    </ListView.View>

    <ListViewItem></ListViewItem>
</ListView>