Hello Vasily,

I recommend using the ClipboardPasting event and modify the cell in the same manner you used to copy the cells. For more details about the pasted event please refer to our online documentation here:

https://ko.infragistics.com/help/wpf/xamgrid-paste-event-and-event-arguments

Let me know if you have any questions.

The following code will provide you with the ability to modify pasted cells. The two styles are listed in XAML. Please see my attached sample for more details. 0410.WpfApplication1.zip

public partial class MainWindow : Window
    {
        private List<CellBase> previouslySelectedCells = null;
        List<CellBase> selectedCells = null;
        bool IsValidSelectedRec; 

        ComponentData data = new ComponentData();
        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = data.GenerateData(50);
        }

        private void xGrid_ClipboardPasting(object sender, Infragistics.Controls.Grids.ClipboardPastingEventArgs e)
        {
            if (IsValidSelectedRec)
            {
                // Color in blue the valid cell selection
                System.Windows.Style CellStyleResource = this.Resources["CopiedCellStyle"] as System.Windows.Style;
                this.SetCellStyle(selectedCells, CellStyleResource);
            }
            else
            {
                // Color in red the invalid cell selection
                System.Windows.Style CellStyleResource = this.Resources["InvalidSelectionCellStyle"] as System.Windows.Style;
                this.SetCellStyle(selectedCells, CellStyleResource);
                
            }
            
        }

        private void xGrid_ClipboardCopying(object sender, Infragistics.Controls.Grids.ClipboardCopyingEventArgs e)
        {
            // Get selected cells
            List<CellBase> selectedCells = new List<CellBase>(e.SelectedItems);
            previouslySelectedCells = selectedCells;
            // Clear the style of the previously selected cells
            if (previouslySelectedCells != null && previouslySelectedCells.Count > 0)
            {
                this.SetCellStyle(previouslySelectedCells, null);
            }

            // Check if the selected region of cells is valid for pasting
            IsValidSelectedRec = e.ValidateSelectedRectangle();

        }

        private void SetCellStyle(List<CellBase> cells, System.Windows.Style cellsStyle)
        {
            
            foreach (CellBase cell in previouslySelectedCells)
            {
                if (cell is Cell)
                {
                    cell.Style = cellsStyle;
                }
                // Set a new style to the copied cells
               
            }
        }
    }

Let me know if you have any questions.

Sincerely,

Michael Di Filippo
Associate Software Developer
Infragistics, Inc.
www.infragistics.com/support

Please review my sample and let me know if you have any questions. WpfApplication1 (modifyPastedCells).zip

Sincerely,

Michael Di Filippo
Associate Software Developer
Infragistics, Inc.
www.infragistics.com/support

This is considered to be a new product idea. You can suggest new product ideas for future versions by emailing ideas@infragistics.com.

Submitting your idea will send it directly to our product management team so that it can be imported into our new ideas community once live: http://ideas.infragistics.com.

Remember when submitting your idea to explain the context in which a feature would be used and why it is needed as well as anything that would prevent you from accomplishing this today. You can even add screenshots to build a stronger case.  You can also link back to this thread for additional details.

I will spend some more time researching this and I'll follow up tomorrow. Thank you for your patience.

Sincerely,

Michael Di Filippo
Associate Software Developer
Infragistics, Inc.
www.infragistics.com/support