Default values for Screen Fileds

[Former Member]

Hi All

By default, if a user doesnt give a value for a particular field, it will have the Default Value of the particular type.But i want it to retain a Null Value in such case. Is it possible.

I have a numeric field in my screen. I need ot trigger a error message if the user doesnt enter any value..

And to accept if ihe enters 0.

BUt even if the user doesnt give any value, the screen field gets 0.

Is there any way to do this

[Former Member]

Hi All

By default, if a user doesnt give a value for a particular field, it will have the Default Value of the particular type.But i want it to retain a Null Value in such case. Is it possible.

I have a numeric field in my screen. I need ot trigger a error message if the user doesnt enter any value..

And to accept if ihe enters 0.

BUt even if the user doesnt give any value, the screen field gets 0.

Is there any way to do this

[Former Member]

Why put a default value in it then?

However..

IF Screen_field = Screen_field_default.
  message err-msg.
  clear Screen_field.
ENDIF.

[Former Member]

Try this

Try to use if condition and check

If <F1> = 0

error message.

endif.

If <F1> LE 0

error message.

endif.

[Former Member]

hi,

use it for null value validation

if <variable> is initial.

error message

endif.

reward if useful

[Former Member]

You might want to check out using the "on request" on some modules in the screen flow to determine if the user has keyed something in... from [Conditional Module Calls|http://help.sap.com/saphelp_46c/helpdata/EN/9f/dbabbd35c111d1829f0000e829fbfe/content.htm] :

ON REQUEST
The module <mod> is only called if the user has entered something in the field. This includes cases when the user overwrites an existing value with the same value, or explicitly enters the initial value. 

Jonathan