Question

How to create dynamic Datawindow

Asked by: gajmp

My requirement is user will execute any kind of Select statement and the result should be displayed in datawindow format.
As per this Select clause will change any no. of columns or datatype of column
From clause will chanage, table name will change or number of tables will change
where clause will change.
So please help me to solve this.
I thought will achive like this
1. create datastore for the given select
2. create external dw with one column
3. excute the DS and insert new column in the extenal DW and insert the DS rows.

But its not working. pls help me to solve this
create one extenal dw and add column dynamically

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Asked On
2009-06-03 at 09:22:00ID24460611
Tags

powerbuilder

Topic

PowerBuilder Programming Language

Participating Experts
2
Points
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Comments
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Answers

 

by: diasroshanPosted on 2009-06-03 at 23:37:10ID: 24544047

Hi,

this is how i do it,

String ls_errors, ls_sql_syntax, ls_path, ls_trs_type
String ls_presentation, ls_dwsyntax
Long        ll_deal, ll_key, ll_seq, ll_type

DataStore ds_export
ds_export = Create DataStore

ls_sql_syntax =  "SELECT * FROM TABLENAME WHERE...." //ur select goes here
ls_presentation = "style(type=grid)"

ls_dwsyntax = SQLCA.SyntaxFromSQL(ls_sql_syntax, ls_presentation, ls_errors)

IF Len(ls_errors) > 0 THEN
            MessageBox("Caution", "SyntaxFromSQL caused these Errors: " + ls_errors)
            RETURN
END IF

ds_export.Create( ls_dwsyntax, ls_errors)

IF Len(ls_errors) > 0 THEN
      
         MessageBox("Caution", "Create caused these Errors: " + ls_errors)       
            RETURN
END IF
ds_export.SetTransObject(SQLCA)
ds_export.Retrieve( )


Cheers,
Rosh

 

by: diasroshanPosted on 2009-06-04 at 00:10:37ID: 24544210

Hi,

In the above code u can replace the use of a DataStore to a Datawindow if u want the data visible on ur screen,

So u can ignore the above lines,
DataStore ds_export
ds_export = Create DataStore

And, instead have a datawindow on ur window named ds_export

Cheers,
Rosh

 

by: gajmpPosted on 2009-06-04 at 01:45:49ID: 24544688

Thanks for your reply. I know how to excute the SQL and fetch the data. My doubt is how to display the same to user. That mean what kind of DW i hv to create and what is the SQL for the DW. If we create externala datawindow then how many columns (what is the datatype for the same) has to be added at the design time . I want to show the column name as column heading

 

by: sandeep_patelPosted on 2009-06-04 at 05:21:20ID: 24546074

When you create dynamic datawindow using above function (SyntaxFromSQL) you can handle column heading with the help of pb catalog tables (pbcattbl and pbcatcol).

While creating datawindow dynamically pb always looks in this table, if data is found then it will format accordingly otherwise will be default.

Regards,
Sandeep

 

by: gajmpPosted on 2009-06-04 at 05:41:13ID: 24546233

sandeep_patel
    Thank you for your suggestion. So now i have to do following steps
1.create external DW with one column (string datatype) (design time)
2. create DS for the user giving SQL
3. add the columns in the external DW by using the table pbcattbl and pbcatcol  (run time)
4. execute and fetch rows from the datastore
5. insert the same row in the DW

pls tell me my understanding is correct or not. if it is correct then pls tell me how the add the column in the extenal DW

 

by: sandeep_patelPosted on 2009-06-04 at 06:06:00ID: 24546462

Nope... There is no need to use any external datawindow.
1. Insert datawindow control on your window. (say dw_1)
2. Use Rosh's code...
      a. From that code remove below two lines
          DataStore ds_export
          ds_export = Create DataStore
      b. Replace ds_export with your datawindow control name (dw_1)

With these two steps you are done with creating datawindow dynamically. Try above two steps and see how your datawindow looks and that is what you wanted to have. Later comes formatting (e.g. setting fonts, column headings etc...)

For formatting only you need to use pb catalog tables.

Regards,
Sandeep

20120131-EE-VQP-002

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