when ObservableCollection change, the datagrid with groups/summarys, the rows disaper/white (not refeshing the view)

[Antonio]

19.2.0.56 (uwp)

1 - if I load ObservableCollection only when I press the filter button, the datagrid shows the rows without groups

2 - if I load ObservableCollection when opening (viewmodel) the datagrid shows the rows and groups, if I press the button the lines are white, keeping the groups

button (command) call an api receive json

how to make groups work at runtime?

************** xaml

 <Button x:Name="Filtrar" Text="Aplicar Filtros" Command="{Binding GetFechosAprovados}" HeightRequest="50" />

 <sfPager:SfDataPager x:Name ="dataPager"

                           PageSize="30"

                           HeightRequest ="50"

                           NumericButtonCount="10"

                           Source="{Binding LFechosAprovados}"

                                 >

                <sfPager:SfDataPager.HeightRequest>

                    <OnPlatform x:TypeArguments="x:Double"

                      iOS="50"

                      Android="50"

                      WinPhone="70"/>

                </sfPager:SfDataPager.HeightRequest>

            </sfPager:SfDataPager>

            <datagrid:SfDataGrid

                x:Name="dataGrid"

                ColumnSizer="Auto"

                GroupingMode="Multiple"

                ItemsSource="{Binding PagedSource, Source={x:Reference dataPager}}"

              AllowPullToRefresh="True"

                LiveDataUpdateMode="AllowDataShaping"

                >

                <datagrid:SfDataGrid.GroupColumnDescriptions ShowColumnWhenGrouped="false">

                    <datagrid:GroupColumnDescription ColumnName="estado" />

                </datagrid:SfDataGrid.GroupColumnDescriptions>

                <datagrid:SfDataGrid.GroupSummaryRows>

                    <datagrid:GridGroupSummaryRow ShowSummaryInRow="True" Title="Total Pacotes: {PacotesFecho} de {numDocFecho} Fecho(s)">

                        <datagrid:GridGroupSummaryRow.SummaryColumns>

                            <datagrid:GridSummaryColumn Name="PacotesFecho"

                                                  MappingName="PacotesFecho"

                                                  Format="{}{Sum}"

                                                  SummaryType="DoubleAggregate">

                            </datagrid:GridSummaryColumn>

                            <datagrid:GridSummaryColumn Name="numDocFecho"

                                                  MappingName="numDocFecho"

                                                  Format="{}{Count}"

                                                  SummaryType="CountAggregate">

                            </datagrid:GridSummaryColumn>

                        </datagrid:GridGroupSummaryRow.SummaryColumns>

                    </datagrid:GridGroupSummaryRow>

                </datagrid:SfDataGrid.GroupSummaryRows>

            </datagrid:SfDataGrid>

************ c#

private ObservableCollection lFechosAprovados = new ObservableCollection();

public ObservableCollection LFechosAprovados

{

get { return lFechosAprovados; }

set { SetProperty(ref lFechosAprovados, value); }

}

...

async Task ExecuteGetFechosAprovados()

{

LFechosAprovados = await Api.GetFechosAprovados(Ano,Mes,ClienteNome);

....

Attachment: Printscreen_6a800651.zip

[Antonio]

i find a solution, i set  AutoGenerateColumnsMode="SmartReset"  now its refreshing the view

[Karthikraja Kalaimani]

Hi Antonio, 

Thank you for contacting Syncfusion support.

We glad to know that your requirement has been achieved at your end. Please let us know if you need further assistance from us. 

Regards,
Karthik Raja