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I had a need to sort a string array and I found some code on Real Gagnon’s website that sorted numbers by creating a DataStore/DataWindow on the fly and used that to sort. Someone added a comment that for strings you need to define the column as char to avoid errors. I improved the code by adding a loop to determine the longest string in the array and using that when defining the DataWindow source.


public function boolean of_sortarray (ref string as_array[], string as_order);// —————————————————————————–

// SCRIPT:     of_SortArray


// PURPOSE:    This function sorts the passed array using a DataStore created

// on-the-fly.


// This is based on code from Real Gagnon:



// ARGUMENTS:  as_array – Array of values to sort

// as_order – The sort order:


// Order value Resulting sort order

// ———————— —————————

// a, asc, ascending, ai, i Case-insensitive ascending

// d, desc, descending, di Case-insensitive descending

// as, s Case-sensitive ascending

// ds Case-sensitive descending



// ———-  ——– —————————————————–

// 09/27/2016 RolandS Initial Coding

// —————————————————————————–


DataStore lds_sort

String ls_source, ls_error

Long ll_idx, ll_max, ll_len, ll_maxlen

Integer li_rc


// determine maximum length of values

ll_max = UpperBound(as_array)

For ll_idx = 1 To ll_max

  ll_len = Len(as_array[ll_idx])

  If ll_len > ll_maxlen Then

  ll_maxlen = ll_len

  End If



// build DataWindow source code

ls_source = “release 6; datawindow( processing=0 ) ” + &

  “table(column=(type=char(” + String(ll_maxlen) + &

  “) name=array dbname=~”array~” ) )”


// create DataStore

lds_sort = Create DataStore

li_rc = lds_sort.Create(ls_source, ls_error)

If li_rc = 1 Then

  // put data into DataStore

  lds_sort.Object.array.Current = as_array

  // sort the data

  lds_sort.SetSort(“array ” + as_order)


  // set array to sorted data

  as_array = lds_sort.Object.array.Current


  Return False

End If


// destroy DataStore

Destroy lds_sort


Return True


end function

Comments (2)

  1. Michael Zuskin

ls_source = “release 6; datawindow( processing=0 ) ” + &

Instead of hardcodidng release number, you can create a function uf_get_pb_version() with this code:

Dscr: returns the major version number of PowerBuilder, for example: "9" (not "9.0"!)
Ret: PB version as string
int li_rc
string ls_pb_version
environment lenv

li_rc = GetEnvironment(ref lenv)
if li_rc 1 then
MessageBox(this.ClassName() + ".uf_get_pb_version", "GetEnvironment() failed.", StopSign!)
return ""
end if

ls_pb_version = String(lenv.pbmajorrevision)

return ls_pb_version

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  Comment was last edited about 5 years ago by Michael Zuskin Michael Zuskin
  1. Roland Smith

The release version of a DataWindow object does not have to match the version of PowerBuilder you are using, it only has to be lower. You could make it match with GetEnvironment but it is not necessary.

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