WPF conditional datagrid grouping - wpf

Question

I have a DataGrid with grouping based on customer name, and it works.
<GroupBox Header="{Binding ElementName=MainWindow, Path=ocS3FileListCount}" ContentStringFormat="" Name="grpRemote" Margin="5,0,0,0" Grid.Column="1" Grid.Row="2">
<GroupBox.Resources>
<CollectionViewSource x:Key="S3List" Source="{Binding ElementName=MainWindow, Path=ocS3FileList}">
<CollectionViewSource.GroupDescriptions>
<PropertyGroupDescription PropertyName="CustomerName"/>
</CollectionViewSource.GroupDescriptions>
</CollectionViewSource>
</GroupBox.Resources>
<DataGrid x:Name="dgS3List" Margin="0,0,0,0" ItemsSource="{Binding Source={StaticResource S3List}}" CanUserAddRows="False" CanUserDeleteRows="False" AutoGenerateColumns="False">
<DataGrid.GroupStyle>
<GroupStyle>
<GroupStyle.Panel>
<ItemsPanelTemplate>
<DataGridRowsPresenter/>
</ItemsPanelTemplate>
</GroupStyle.Panel>
<GroupStyle.HeaderTemplate>
<DataTemplate>
<Label Content="{Binding Name}" />
</DataTemplate>
</GroupStyle.HeaderTemplate>
</GroupStyle>
</DataGrid.GroupStyle>
<DataGrid.Columns>
<DataGridTextColumn Header="File Name" Width="*" Binding="{Binding Path=FileName}" IsReadOnly="True" />
<DataGridTextColumn Header="Received" Width="100" Binding="{Binding Path=JobReceived,StringFormat=d}" IsReadOnly="True" Stylus.IsPressAndHoldEnabled="True" />
<DataGridTextColumn Header="Date" Width="100" Binding="{Binding Path=JobDate,StringFormat=d}" IsReadOnly="True" Stylus.IsPressAndHoldEnabled="True" />
</DataGrid.Columns>
</DataGrid>
</GroupBox>
I do have a few users that would like the option to turn grouping on and off for different uses.
I've used conditional styles before based on the status of a different control, but is it possible to have a conditional GroupStyle?
Having it enabled based on a toolbar checkbox seems like a good solution:
<CheckBox x:Name="chkGroupSwitch" IsChecked="True">Enable Grouping</CheckBox>

Answer 1

I don't know about a way to make your GroupStyle style conditional in XAML, but since the GroupStyle only applies if you have a GroupDescription in your ViewSource, I would use a different approach:
The solution in C# is simple. All you have to do is add/remove the ViewSource's PropertyGroupDescription whenever the state of your checkbox changes.
eg.
private void ToggleGroupingEnabled(bool mode)
{
CollectionViewSource viewSource = grpRemote.Resources["MyViewSourceName"] as CollectionViewSource;
viewSource.GroupDescriptions.Clear();
if (mode)
{
var groupDesc = new PropertyGroupDescription("CustomerName");
viewSource.GroupDescriptions.Add(groupDesc);
}
}
Assuming your ViewSource has a name:
<CollectionViewSource x:Key="S3List" x:Name="MyViewSourceName" Source="{Binding ElementName=MainWindow, Path=ocS3FileList}">