// For complete examples and data files, please go to https://github.com/aspose-cells/Aspose.Cells-for-.NET // Get the active worksheet Worksheet sheet = grdDataEntry.GetActiveWorksheet(); // Set the total columns diaplyed in the grid sheet.ColumnsCount = 15; // Set the total rows displayed in the grid sheet.RowsCount = 15; // Define a new menu item and specify its event handler MenuItem mi = new MenuItem("newMenuItem", new System.EventHandler(miClicked)); // Set the label mi.Text = "New Item"; // Add the menu item to the GridDesktop's context menu grdDataEntry.ContextMenu.MenuItems.Add(mi);