user3486773 user3486773 - 1 month ago 21
C# Question

WPF DataGridComboBoxColumn not showing the context menu?

I am trying to make a DataGridComboBoxColumn that has a static list to choose from: Not Started, In Progress, Completed

Here is what I have in the XAML and while it builds fine I cannot see the options in the drop down:

<DataGridComboBoxColumn Header="Status" Width="auto" IsReadOnly="False" >
<DataGridColumn.HeaderStyle>
<Style TargetType="DataGridColumnHeader">
<Setter Property="Background" Value="LightGoldenrodYellow" />
<Setter Property="BorderThickness" Value="2,2,0,2" />
</Style>

</DataGridColumn.HeaderStyle>
<ContextMenuService.ContextMenu>
<ContextMenu>
<MenuItem Header="Not Started" />
<MenuItem Header="In Progress" />
<MenuItem Header="Completed" />
</ContextMenu>
</ContextMenuService.ContextMenu>
</DataGridComboBoxColumn>


I don't understand why this doesn't work they way that other DataGrid.ContextMenu's work. I feel like I'm missing something really easy here.

Rom Rom
Answer

you can use CompositeCollection:

<DataGridComboBoxColumn  Header="Status" Width="auto"  IsReadOnly="False"  SelectedItemBinding="{Binding Path=Value}">
                <DataGridColumn.HeaderStyle>
                    <Style TargetType="DataGridColumnHeader">
                        <Setter Property="Background" Value="LightGoldenrodYellow" />
                        <Setter Property="BorderThickness" Value="2,2,0,2" />
                    </Style>
                </DataGridColumn.HeaderStyle>
                <DataGridComboBoxColumn.ItemsSource>
                    <CompositeCollection>
                        <sys:String>Not Started</sys:String>
                        <sys:String>In Progress</sys:String>
                        <sys:String>Completed</sys:String>
                    </CompositeCollection>
                </DataGridComboBoxColumn.ItemsSource>
            </DataGridComboBoxColumn>

Add the namespace:

xmlns:sys="clr-namespace:System;assembly=mscorlib"
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