I have a question about validation. I have a column in the grid which can be “empty” or if it has value the value must be “integer”. That means if user clicks in a cell in this column, user can enter either an integer or can click on the cell but leave the cell empty. I tried using ValidInteger, but what happens is, once the user clicks in the cell, he cannot leave the cell empty. It expects an integer value in that cell.
How can I do this validation. Please help.