WPF ListView Grouping Grouping

Define data sources and grouping fields in resource:

<CollectionViewSourcex:key= "ListData"Source="{Binding Categoryitemsview}">            <collectionviewsource.groupdescriptions>                <propertygroupdescriptionPropertyName= "CategoryType"></propertygroupdescription>            </collectionviewsource.groupdescriptions>        </CollectionViewSource>

The grouping field can also be defined in code in the loaded event:

        Private void Filemanagecard_loaded (object  sender, RoutedEventArgs e)        {            = (CollectionView) Collectionviewsource.getdefaultview (Lvitemscategory.itemssource);             New Propertygroupdescription ("categorytype");            View. Groupdescriptions.add (groupdescription);        }

And then

<ListViewGrid.Row= "0"x:name= "Lvitemscategory"ItemsSource="{Binding Source={staticresource listData}}"Style="{StaticResource Filemanagerlistviewstyle}"Itemcontainerstyle="{StaticResource Filemanagerlistviewitemstyle}"SelectionMode= "single">                        <Listview.groupstyle>                            <GroupStyle>                                <groupstyle.headertemplate>                                    <DataTemplate>                                        <StackPanelOrientation= "Horizontal"Background= "Transparent"Height= "+">                                            <TextBlockText="{Binding Name}"FontSize= "+"FontWeight= "Bold"Foreground= "Gray"/>                                        </StackPanel>                                    </DataTemplate>                                </groupstyle.headertemplate>                            </GroupStyle>                        </Listview.groupstyle>                    </ListView>

Finally attach style and Itemcontainerstyle:

    <Stylex:key= "Filemanagerlistviewstyle"TargetType="{x:type ListView}">        <Setter Property= "VerticalAlignment"Value= "Top"></Setter>        <Setter Property= "HorizontalAlignment"Value= "Stretch"></Setter>        <Setter Property= "AllowDrop"Value="{Binding Isallowdrop}"></Setter>        <Setter Property= "Template">            <Setter.value>                <ControlTemplateTargetType="{x:type ListView}">                    <ScrollViewerverticalscrollbarvisibility= "Hidden"HorizontalAlignment= "Stretch">                        <Itemspresenter/>                    </ScrollViewer>                </ControlTemplate>            </Setter.value>        </Setter>    </Style>    <Stylex:key= "Filemanagerlistviewitemstyle"TargetType="{x:type ListViewItem}">        <Setter Property= "HorizontalAlignment"Value= "Stretch"></Setter>        <Setter Property= "Cursor"Value= "Hand"></Setter>        <Setter Property= "Template">            <Setter.value>                <ControlTemplateTargetType="{x:type ListViewItem}">                    <Borderx:name= "Back"Background= "Transparent"Margin= "0,0,0,0"Height= "+">                        <GridMargin= "20,0,0,0">                            <grid.columndefinitions>                                <ColumnDefinitionWidth= "+"/>                                <ColumnDefinitionWidth="*"/>                            </grid.columndefinitions>                            <ImageGrid.column= "0"HorizontalAlignment= "Center"VerticalAlignment= "Center"Width= " the"Height= " the"Source="{Binding Icon,converter={staticresource imgpathtoimageconverter}}"/>                            <DockPanelGrid.column= "1">                                <TextBlockText="{Binding DisplayName}"Height= "+"Foreground= "#FF6D6D6D"FontSize= "+"/>                                <TextBlockText="{Binding count,stringformat= ' ({0}) '}"Foreground= "#FF6D6D6D"FontSize= "+"></TextBlock>                            </DockPanel>                        </Grid>                    </Border>                    <controltemplate.triggers>                        <Trigger Property= "IsMouseOver"Value= "True">                            <SetterTargetName= "Back" Property= "Background"Value= "Lightgray"></Setter>                        </Trigger>                        <Trigger Property= "IsSelected"Value= "True">                            <SetterTargetName= "Back" Property= "Background"Value= "Black"></Setter>                        </Trigger>                    </controltemplate.triggers>                </ControlTemplate>            </Setter.value>        </Setter>    </Style>

WPF ListView Grouping Grouping