I need to select one row, multiple rows or a cell in Ultragrid to copy from the grid. How can this be accomplish?
Your question isn't very specific, but if you want to get or set the selected row, you can use the .Selected property on the row. You can also use:
_yourGrid.DisplayLayout.ActiveRow = whateverRowYouWantSelected
For multiple selection, you can use
_yourGrid.DisplayLayout.SelectedRows