Question

.GetRows() paging...

Asked by: kevp75

I need a better way to page my .GetRows() array.  Currently some of the pages are messed up, and I actually ran into an instance where my 4G of RAM machine did not have enough memory to hold the array (some 3.5Mil records)

Is there a way I can limit the records thrown into the array, or some links that I can view, or can someone make this better?

Function PagingLinks(ByVal strArrName, ByVal strNumPerPage, ByVal strPageURL, ByVal strDivToLoad, ByVal strFirst, ByVal strPrev, ByVal strNext, ByVal strLast, ByRef iStart, ByRef iStop)
	PagingLinks = ""
	iStart = request.querystring("s")
	iOffset = request.querystring("o")
	if Not validNumber(iStart) then
		iStart = 0
	else
		iStart = CLng(iStart)
	end if
	if Not validNumber(iOffset) then
		iOffset = strNumPerPage
	else
		iOffset = CLng(iOffset)
	end if
	if UBound(strArrName, 2) < strNumPerPage then
		iRows = (ubound(strArrName, 2) + 1)
	else
		iRows = ubound(strArrName, 2)
	end if
	If iRows > (iOffset + iStart) Then
		iStop = iOffset + iStart - 1
	Else
		iStop = iRows
	End If
	if iStop > iRows - iOffset then
		iStop = iStop - 1
	end if
	If Not(validNumber(iOffset)) Then iOffset = 1
	pages = RoundUp(iRows / iOffset)
	pgNum = RoundUp(iStart / iOffset) + 1
	PagingLinks = PagingLinks & "<a href=""#"" onclick=""loadPageFade('" & strPageURL & "&amp;s=0&amp;o=" & iOffset & "', '" & strDivToLoad & "');return false;"">" & strFirst & "</a> "
	if iStart > 0 then
		PagingLinks = PagingLinks & "<a href=""#"" onclick=""loadPageFade('" & strPageURL & "&amp;s=" & iStart - iOffset & "&amp;o=" & iOffset & "', '" & strDivToLoad & "');return false;"">" & strPrev & "</a> "
	end if
	Dim MaxPagesToShow, MaxLBound, MaxUBound
	MaxPagesToShow = 10
	MaxLBound = pgNum - Int(MaxPagesToShow/2)
	If MaxLBound < 1 Then MaxLBound = 1
	MaxUBound = MaxLBound + MaxPagesToShow
	If MaxUBound > pages Then
		MaxUBound = pages
		MaxLBound = MaxUBound - MaxPagesToShow
	End If
	If MaxLBound < 1 Then MaxLBound = 1
	if (iRows - iOffset) < 0 then
		l = 0
	else 
		l = (iRows - iOffset)
	end if
	for z = MaxLBound to MaxUBound
		pgOffset = z * iOffset - iOffset
		if z = pgNum then
			PagingLinks = PagingLinks & ("<b>" & z & "</b> ")
		else
			PagingLinks = PagingLinks & ("<a href=""#"" onclick=""loadPageFade('" & strPageURL & "&amp;s=" & pgOffset & "&amp;o=" & iOffset & "', '" & strDivToLoad & "');return false;"">" & z & "</a> ")
		end if
	next
	if iStop + 1 < iRows then
		PagingLinks = PagingLinks & "<a href=""#"" onclick=""loadPageFade('" & strPageURL & "&amp;s=" & iStart + iOffset & "&amp;o=" & iOffset & "', '" & strDivToLoad & "');return false;"">" & strNext & "</a> "
	end if
	PagingLinks = PagingLinks & "<a href=""#"" onclick=""loadPageFade('" & strPageURL & "&amp;s=" & l & "&amp;o=" & iOffset & "', '" & strDivToLoad & "');return false;"">" & strLast & "</a><br />"
End Function

                                  
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Asked On
2009-08-09 at 15:28:41ID24638615
Topic

Active Server Pages (ASP)

Participating Experts
1
Points
500
Comments
4

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Answers

 

by: kevp75Posted on 2009-08-09 at 15:38:21ID: 25056284

I wonder if it would be too much of a performance hit to add the array to a recordset object or dictionary object and do it that way, or should I consider using the recordset object pre-population.

right now to get my array I am using parameterized queries, can I still use the recordset object in conjunction with the command object?

 

by: fritz_the_blankPosted on 2009-08-11 at 11:42:30ID: 25072010

I am a big fan of .GetRows(), but is that the best approach here? If you are going to work with 3.5 million records, retrieving them all at the same time seems like a bad idea. You might be better off using traditional paging to retrieve subsets, and then if you like, to dump the subset into the .GetRows() function.

Best,

FtB

 

by: kevp75Posted on 2009-08-11 at 12:04:28ID: 25072233

yeah.  i agree....  (and already implemented =))

I can use .recordset in conjunction with .command

thanks FtB

 

by: fritz_the_blankPosted on 2009-08-11 at 14:43:38ID: 25073788

You are very welcome.

FtB

20120131-EE-VQP-002

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