How do I update WPF datagrid when using eventtrigger and invokecommandaction to trigger roweditending / celleditending ? or is there a way to update datagrid automatically ?

See more:

C#

XAML

WPF

MVVM

DataGrid

, +

I want to use MVVM and InvokeCommandAction to trigger some DataGrid-edit-events and so to call background commands which have just to do some calculations with the changed value in the DataGrid. So I want the view to update normally as it would do without the EventTriggers. However it appears that the view does not update automatically when using these Triggers. So I wanted to know if there is a way to get the view automatically updated or at least some nice ideas how to implement the update manually?

Below some snippets of my XAML code:

<DataGrid Name="dgObstructionsBottom"  CanUserAddRows="True" ItemsSource="{Binding ObstructionBottom}" Height="419" AutoGenerateColumns="False"    CurrentCell="{Binding ObstructionBottomSelectedItem, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
                                    
                                    <DataGrid.Columns>
                                        <DataGridTextColumn Binding="{Binding start, UpdateSourceTrigger=PropertyChanged}" Header="x1" Width="*"  EditingElementStyle="{StaticResource MaterialDesignDataGridTextColumnEditingStyle}" />
                                        
                                        <DataGridTextColumn  Binding="{Binding end, UpdateSourceTrigger=PropertyChanged}"   Header="x2" Width="*" EditingElementStyle="{StaticResource MaterialDesignDataGridTextColumnEditingStyle}"/>
                                    </DataGrid.Columns>
                                    <i:Interaction.Triggers>
                                        <i:EventTrigger EventName="BeginningEdit">
                                            <i:InvokeCommandAction Command="{Binding BeginningEditCommand}" CommandParameter="Bot" />
                                        </i:EventTrigger>
                                        <i:EventTrigger EventName="CellEditEnding">
                                            <i:InvokeCommandAction Command="{Binding ObstructionBottomChangeCommand}" />
                                        </i:EventTrigger>
                                        <i:EventTrigger EventName="AddingNewItem">
                                            <i:InvokeCommandAction Command="{Binding AddingNewItemCommand}"/>
                                        </i:EventTrigger>
                                    </i:Interaction.Triggers>
                                    <DataGrid.InputBindings>
                                        <KeyBinding Key="Delete" Command="{Binding ObstructionBottomRemoveCommand}"/>
                                    </DataGrid.InputBindings>
                                </DataGrid>

What I have tried:

So i somehow managed to do it manually but therefore I have to save an old version of the Datagrids ItemsSource and to check where i have to insert the changes.