<Grid>
        <ListView Margin="10" ItemsSource="{Binding Data}">
            <ListView.GroupStyle>
                <GroupStyle>
                    <GroupStyle.HeaderTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding DocType}" Margin="0,3,3,0" FontWeight="Bold"/>
                        </DataTemplate>
                    </GroupStyle.HeaderTemplate>
                </GroupStyle>
            </ListView.GroupStyle>
            <ListView.View>
                <GridView>
                    <GridView.Columns>
                        <GridViewColumn Header="ID" Width="75" DisplayMemberBinding="{Binding ID}"/>
                        <GridViewColumn Header="Number Info" Width="100" DisplayMemberBinding="{Binding Number}"/>
                        <GridViewColumn Header="Date Info" Width="100" DisplayMemberBinding="{Binding Date}"/>
                    </GridView.Columns>
                </GridView>
            </ListView.View>
        </ListView>
    </Grid>

public ICollectionView Data { get; private set; }
Data = CollectionViewSource.GetDefaultView(inputData);
Data.GroupDescriptions.Add(new PropertyGroupDescription("DocType"));

public class MyData
{
    public string ID { get; set; }
    public string DocType { get; set; }
    public string Number { get; set; }
    public string Date { get; set; }
}