<dxg:GridControl Name="grid" 
                             ItemsSource="{Binding }" AutoExpandAllGroups="True" 
                             AllowDrop="False"  IsFilterEnabled="False">
                <dxg:GridControl.Columns>
                    <dxg:GridColumn FieldName="Weekday" MinWidth="30" GroupIndex="0">
                        
                        <dxg:GridColumn.GroupValueTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Path=Value,Converter={StaticResource weekdayConverter}}" Margin="5,0,0,0" />
                            </DataTemplate>
                        </dxg:GridColumn.GroupValueTemplate>
                    </dxg:GridColumn>
                    
                    <dxg:GridColumn FieldName="Starttime" MinWidth="30">
                        <dxg:GridColumn.CellTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Path=Value,Converter={StaticResource dateTimeConverter},ConverterParameter=‘HHmm‘}" VerticalAlignment="Center" />
                            </DataTemplate>
                        </dxg:GridColumn.CellTemplate>
                    </dxg:GridColumn>
                    
                    <dxg:GridColumn FieldName="Endtime" MinWidth="30">
                        <dxg:GridColumn.CellTemplate>
                            <DataTemplate>
                                <TextBlock Text="{Binding Path=Value,Converter={StaticResource dateTimeConverter},ConverterParameter=‘HHmm‘}" VerticalAlignment="Center" />
                            </DataTemplate>
                        </dxg:GridColumn.CellTemplate>
                        
                    </dxg:GridColumn>
                    
                    <dxg:GridColumn MinWidth="30" >
                        <dxg:GridColumn.CellTemplate>
                            <DataTemplate>
                            <Button Width="80" Name="btnDelete" Click="btnDelete_Click">Delete</Button>
                            </DataTemplate>
                        </dxg:GridColumn.CellTemplate>
                    </dxg:GridColumn>
                </dxg:GridControl.Columns>
                
                <dxg:GridControl.GroupSummary>
                    <dxg:GridSummaryItem SummaryType="Count" />
                </dxg:GridControl.GroupSummary>
                
                <dxg:GridControl.View>
                    <dxg:TableView Name="view" AllowGrouping="False" AllowEditing="False" 
                                   AllowColumnFiltering="False" AllowSorting="False" AllowDrop="False" 
                                   AllowMoving="False" ShowGroupedColumns="False" 
                                   ShowGroupPanel="False"   AutoWidth="True" NavigationStyle="Row" />
                </dxg:GridControl.View>
            </dxg:GridControl>