If I first time change cell value on client in webgrid, I can get get new value: cell.getValue() and previous value: cell.getOldValue().
For example:
1) original value: 10
2) I change it to 11, after this: cell.getValue() == 11 and cell.getOldValue() == 10
3) I change it from 11 to 12, after this: cell.getValue == 12 and cell.getOldValue == 11 and so on...
Is there way to get original cell value from server? i.e 10 in my case
I'd create a separate, hidden column containing the original values.