Quantity Field in sap bsp

Hi Experts,

I am creating bsp page for creating sales order.

I am displaying dynamic table with quantity field in that quantity i don't want to display decimal places so i created Z- data element and using it but in that problem is it is displaying 0 in all sales which user does not want.

So i am using character field for the same in that case i am getting 1 extra space for example suppose i enter quantity as '20' then i am getting ' 20'

i tried to remove that extra space by CONDENSE NO-GAP then also space is not getting removed.

It creates me a problem while converting it to Quantity.It gives Dump.

Note :- I am displaying dynamic table which is getting created from fieldcat.

Please guide me .

Thanks in Advance.