c# - Display deleted rows in a DataTable

Question

So I have a DataTable that I bind to the DataGrid in XAML. User is allowed to add, modify and remove rows for a table. I would like to mark rows with a specific colour, depending on the action that user makes. For instance, if user adds a row, that row will be marked as Green. If user modifies a row, that row will then be marked as orange. And if user removes the row, that row will be marked as red. The problem that I have is that the removed row is no longer visible once I call row.Delete(); from a view model.

Is there a way to keep a DataRow marked for removal shown in a DataGrid? I know how to achieve the row background effect, depending on user action. The only problem is I don't know how to keep the deleted row visible. The idea is that user can either revert changes or apply them and that's when the pending deletion row should be actually deleted.

EDIT (Added example on how I update row background colour):

<MultiDataTrigger>
    <MultiDataTrigger.Conditions>
        <Condition Binding="{Binding Path=Row.RowState}" Value="{x:Static data:DataRowState.Deleted}" />
        <Condition Binding="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsSelected}" Value="False" />
    </MultiDataTrigger.Conditions>
    <MultiDataTrigger.Setters>
        <Setter Property="Background" Value="IndianRed" TargetName="DGR_Border"/>
        <Setter Property="Foreground" Value="Black"/>
        <Setter Property="FontWeight" Value="Bold"/>
    </MultiDataTrigger.Setters>
</MultiDataTrigger>

Answer 1

I think, when user marks row for deleting - you should save it index somewhere (int[] array or List<int> for example), then call yourDataGridView.Rows.RemoveAt(index) for each element in that collection when user finished working with table.

Maybe something like:

//Collection for rows indexes which will be deleted later
List<int> rowsToDelete = new List<int>();

//Call this when user want to delete element
private void MarkElementsToRemove()
{
   if (yourDataGrid.SelectedItems.Count > 0)
   {
       //Get selected by user rows
       for (int i = 0; i < yourDataGrid.SelectedItems.Count; ++i)
       {
           DataGridRow row = (DataGridRow)yourDataGrid.SelectedItems[i];

           //Fill rows background with some color to mark them visually as "deleted"
           row.Background = new SolidColorBrush(Color.FromRgb(255, 0, 0));

           //Get row index to remove it later and add it to collection
           rowsToDelete.Add(row.GetIndex());                        
        }
    }
}

// Call this when user finished work with DataGrid and items may be removed
private void RemoveMarkedElements()
{
   foreach (int index in rowsToDelete)
   {
      yourDataGrid.Items.RemoveAt(index);
   }
   
   rowsToDelete.Clear();
}

Instead of index you may save whole DataGridRow and call yourDataGrid.Remove(wholeRow);. And for reverse deletion, you just unmark it by removing color and removing row index or whole row from a collection.