>>>I don't want to have NULL values when I empty the value of the column.
>>>I want when the user empty the value to have an empty string in it :-)
>>>How to do this?
>>>
>>>Thanks in advance.
>>
>>You could try:

dataGridView.Columns[x].DefaultCellStyle.NullValue = String.Empty;

>>But I dunno if it will work :-{
>
>Thank you Viv,
>but no, it didn't work :o(
>I could handle this in CellFormating, but I thought there is a better solution :-)

I did a quick test after posting (just by dragging a dataset with a nullable field onto the form and setting the relevant property as above) and it did indeed seem to work for me. How are you binding and what happened when you tried it? What happens if you use:

dataGridView.Columns[x].DefaultCellStyle.NullValue = "Unknown";

and use Ctrl-0 on the cell ?