asked on

Datawindow modify expression, length property.

I have come across a very strange limitation of pb7 (maybe I am wrong).

To be very brief I have a datawindow control dw_1 with external dataobject d_external.
d_external has one column s_column_1 whoose length is 11. I want to change that length to 20 at runtime.

I am successfully doing these:
s_expr_width = "s_column_1.width="+string(a_stparm.first_col_width*30)
s_expr_edit_limit = "s_column_1.edit.limit="+string(a_stparm.first_col_width) //first_col_width has got value 20
ret_value=dw_1.Modify(s_expr_width)
ret_value=dw_1.Modify(s_expr_edit_limit)

I mean, I am able to modify width and edit limit propery but I don't know what is the name of length propetry.

Dear expert, I would be able to give any feedback tomorrow.(Please forgive)

ASKER CERTIFIED SOLUTION

Vikas_Dixit

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Mateen

ASKER

Hi vikas:

If I export d_external then a line from d_external.srd is:

table(column=(type=char(11) updatewhereclause=no name=s_column_1_ddw dbname="s_column_1" )

I want to change char(11) with char(20). I am wondering why this facility is not provided in modify properties.

diasroshan

hi mateen,

type = char(11) as posted by u...

here char(11) is the database column length and datatype....

there is no way by which this can be changed by PB coz this is only the database column specification which the datawindow is showing...

to have a change of length u need to do necessary alteration in ur backend... alter the length of ur column to 20 and then only can the datawindow show the change of length....

do ask for more assistance...

Cheers,
Rosh

diasroshan

hi,

oops i'm sorry... u are refering to an external dw... well then there's no talk about altering the backend...sorry..

i don't think its possible to change the column length dynamically unless manually doing it in the case of external dw...

Rosh

Mateen

ASKER

Hi vikas:

Agreed that create method is the only option.

In the open event doing this

string ls_syntax
long position,RETVALUE
ls_syntax=dw_1.object.datawindow.syntax
messagebox('ORIGINAL SYNTAX',ls_syntax)
position=pos(ls_syntax,'char(11)')
ls_syntax=replace(ls_syntax,position,8,'char(20)')
messagebox('CHANGED SYNTAX',ls_syntax)
ls_syntax=dw_1.object.datawindow.syntax
RETVALUE=dw_1.create(ls_syntax)
MESSAGEBOX('SUCCESS/FAILURE OF CREATE',STRING(RETVALUE))
dw_1.settransobject(sqlca)
ls_syntax=dw_1.object.datawindow.syntax
messagebox('NEW SYNTAX',ls_syntax)

retvalue shows 1 meaning successful creation. But ls_syntax=dw_1.object.datawindow.syntax after recreation is showing old values.

SOLUTION

diasroshan

membership

This solution is only available to members.

To access this solution, you must be a member of Experts Exchange.

Start Free Trial

Mateen

ASKER

U r right rosh.