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ASP vbscript recordset paging headache
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Join Date: Jan 2008
Posts: 5
Reputation:
Solved Threads: 0
Hi,
I am having a problem using Dreamweaver CS3 standard recordset paging behavior. It doesn’t seem to work when I pass parameter values from a FORM on my search page, to the recordset on my results page.
- Recordset Paging works if no parameters are used in the recordset sql code (ie. simple sql code):
SELECT *
FROM db_name
WHERE (db_field1 LIKE ‘%text1%’ OR db_field2 LIKE ‘%text2%’)
- Recordset Paging works if I pass the same text to the sql code using parameters set within the recordset:
SELECT *
FROM db_name
WHERE (db_field1 LIKE %parameter1% OR db_field2 LIKE %parameter2%)
--> inside the recordset parameter1 was set to ‘text1’, parameter2 was set to ‘text2
- However if I pass the same text (text1, text2) from a FORM on a search page to the recordset using recordset parameters, the Recordset Paging fails.
SELECT *
FROM db_name
WHERE (db_field1 LIKE %parameter1% OR db_field2 LIKE %parameter2%)
--> inside the recordset parameter1 and parameter2 were set using the Request.Form("….")
--> on the FORM the values of the fields were set to text1, text2
The form, database, sql code all work fine. After I perform a search, the correct database results are displayed on my first results.asp page. My problem is when I try to use recordset paging. For some reason when I try to page through the results I get the following error:
Error Type:
ADODB.Field (0x800A0BCD)
Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record.
I have completely striped my code to the bare essentials, and conclude that the search criteria are not being sent to the results page each time I click “Next” etc. Therefore each time I try to page through the results, the recordset values are all empty and the EOF value is returned.
Please have a quick look at the code below. Any help, advice, suggestions or other scripts (javascript or vbscript) that will work instead will be gratefully accepted. I have been trying to fix this for days and it’s driving me crazy.
To help you understand the code here is a brief explanation of its purpose, a list of the variables used and the error produced.
- takes 2 search fields from FORM on search page (SearchValue1 = city, SearchValue2 = country)
- compares with database field (Keywords) for any matches (database name = test20.mdb)
- outputs the text contents of database field (Image_Name)
- the text outputs are displayed one per page eg. page 1 = record 1, page2 = record 2, page 3 = record 3 ....
- a "Next" link pages through the displayed results
File Name = results.asp
Connection File Name = con_cwphoto.asp
Recordset Name = rs
Database name = test20.mdb
Database Field Names = Keywords, Image_Name
FORM Fields (on search.asp page) = SearchValue1 (city), SearchValue2 (country)
The URL passed by clicking the “Next” link:
http://localhost/conor%20wall%20phot...Submit&index=1
It seems to pass the search criteria, but maybe it isn’t being passed correctly.
The error:
Error Type:
ADODB.Field (0x800A0BCD)
Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record.
The line the error points to:
This line is in the html tags and displays the contents of the “Image_Name” database field.
The CS3 recordset paging behavior code:
I am having a problem using Dreamweaver CS3 standard recordset paging behavior. It doesn’t seem to work when I pass parameter values from a FORM on my search page, to the recordset on my results page.
- Recordset Paging works if no parameters are used in the recordset sql code (ie. simple sql code):
SELECT *
FROM db_name
WHERE (db_field1 LIKE ‘%text1%’ OR db_field2 LIKE ‘%text2%’)
- Recordset Paging works if I pass the same text to the sql code using parameters set within the recordset:
SELECT *
FROM db_name
WHERE (db_field1 LIKE %parameter1% OR db_field2 LIKE %parameter2%)
--> inside the recordset parameter1 was set to ‘text1’, parameter2 was set to ‘text2
- However if I pass the same text (text1, text2) from a FORM on a search page to the recordset using recordset parameters, the Recordset Paging fails.
SELECT *
FROM db_name
WHERE (db_field1 LIKE %parameter1% OR db_field2 LIKE %parameter2%)
--> inside the recordset parameter1 and parameter2 were set using the Request.Form("….")
--> on the FORM the values of the fields were set to text1, text2
The form, database, sql code all work fine. After I perform a search, the correct database results are displayed on my first results.asp page. My problem is when I try to use recordset paging. For some reason when I try to page through the results I get the following error:
Error Type:
ADODB.Field (0x800A0BCD)
Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record.
I have completely striped my code to the bare essentials, and conclude that the search criteria are not being sent to the results page each time I click “Next” etc. Therefore each time I try to page through the results, the recordset values are all empty and the EOF value is returned.
Please have a quick look at the code below. Any help, advice, suggestions or other scripts (javascript or vbscript) that will work instead will be gratefully accepted. I have been trying to fix this for days and it’s driving me crazy.
To help you understand the code here is a brief explanation of its purpose, a list of the variables used and the error produced.
- takes 2 search fields from FORM on search page (SearchValue1 = city, SearchValue2 = country)
- compares with database field (Keywords) for any matches (database name = test20.mdb)
- outputs the text contents of database field (Image_Name)
- the text outputs are displayed one per page eg. page 1 = record 1, page2 = record 2, page 3 = record 3 ....
- a "Next" link pages through the displayed results
File Name = results.asp
Connection File Name = con_cwphoto.asp
Recordset Name = rs
Database name = test20.mdb
Database Field Names = Keywords, Image_Name
FORM Fields (on search.asp page) = SearchValue1 (city), SearchValue2 (country)
The URL passed by clicking the “Next” link:
http://localhost/conor%20wall%20phot...Submit&index=1
It seems to pass the search criteria, but maybe it isn’t being passed correctly.
The error:
Error Type:
ADODB.Field (0x800A0BCD)
Either BOF or EOF is True, or the current record has been deleted. Requested operation requires a current record.
The line the error points to:
ASP Syntax (Toggle Plain Text)
<p><%=(rs.Fields.Item("Image_Name").Value)%></p>
This line is in the html tags and displays the contents of the “Image_Name” database field.
The CS3 recordset paging behavior code:
ASP Syntax (Toggle Plain Text)
<%@LANGUAGE="VBSCRIPT" CODEPAGE="65001"%> <!--#include file="../Connections/con_cwphoto.asp" --> <% ‘ Get search criteria from FORM on the search page ‘ (FORM has 2 fields - SearchValue1 and SearchValue2) Dim rs__SearchValue1 rs__SearchValue1 = "NULL" If (Request.Form("SearchValue1") <> "") Then rs__SearchValue1 = Request.Form("SearchValue1") End If %> <% Dim rs__SearchValue2 rs__SearchValue2 = "NULL" If (Request.Form("SearchValue2") <> "") Then rs__SearchValue2 = Request.Form("SearchValue2") End If %> <% ' set up connection (con_cwphoto) ' SQL code compares search criteria with "Keywords" db field in "test20.mdb" db Dim rs Dim rs_cmd Dim rs_numRows Set rs_cmd = Server.CreateObject ("ADODB.Command") rs_cmd.ActiveConnection = MM_con_cwphoto_STRING rs_cmd.CommandText = "SELECT * FROM test20 WHERE (Keywords LIKE ? OR Keywords LIKE ?)" rs_cmd.Prepared = true rs_cmd.Parameters.Append rs_cmd.CreateParameter("param1", 200, 1, 255, "%" + rs__SearchValue1 + "%") ' adVarChar rs_cmd.Parameters.Append rs_cmd.CreateParameter("param2", 200, 1, 255, "%" + rs__SearchValue2 + "%") ' adVarChar Set rs = rs_cmd.Execute rs_numRows = 0 %> <% ' *** Recordset Stats, Move To Record, and Go To Record: declare stats variables Dim rs_total Dim rs_first Dim rs_last ' set the record count rs_total = rs.RecordCount ' set the number of rows displayed on this page If (rs_numRows < 0) Then rs_numRows = rs_total Elseif (rs_numRows = 0) Then rs_numRows = 1 End If ' set the first and last displayed record rs_first = 1 rs_last = rs_first + rs_numRows - 1 ' if we have the correct record count, check the other stats If (rs_total <> -1) Then If (rs_first > rs_total) Then rs_first = rs_total End If If (rs_last > rs_total) Then rs_last = rs_total End If If (rs_numRows > rs_total) Then rs_numRows = rs_total End If End If %> <% Dim MM_paramName %> <% ' *** Move To Record and Go To Record: declare variables Dim MM_rs Dim MM_rsCount Dim MM_size Dim MM_uniqueCol Dim MM_offset Dim MM_atTotal Dim MM_paramIsDefined Dim MM_param Dim MM_index Set MM_rs = rs MM_rsCount = rs_total MM_size = rs_numRows MM_uniqueCol = "" MM_paramName = "" MM_offset = 0 MM_atTotal = false MM_paramIsDefined = false If (MM_paramName <> "") Then MM_paramIsDefined = (Request.QueryString(MM_paramName) <> "") End If %> <% ' *** Move To Record: handle 'index' or 'offset' parameter if (Not MM_paramIsDefined And MM_rsCount <> 0) then ' use index parameter if defined, otherwise use offset parameter MM_param = Request.QueryString("index") If (MM_param = "") Then MM_param = Request.QueryString("offset") End If If (MM_param <> "") Then MM_offset = Int(MM_param) End If ' if we have a record count, check if we are past the end of the recordset If (MM_rsCount <> -1) Then If (MM_offset >= MM_rsCount Or MM_offset = -1) Then ' past end or move last If ((MM_rsCount Mod MM_size) > 0) Then ' last page not a full repeat region MM_offset = MM_rsCount - (MM_rsCount Mod MM_size) Else MM_offset = MM_rsCount - MM_size End If End If End If ' move the cursor to the selected record MM_index = 0 While ((Not MM_rs.EOF) And (MM_index < MM_offset Or MM_offset = -1)) MM_rs.MoveNext MM_index = MM_index + 1 Wend If (MM_rs.EOF) Then MM_offset = MM_index ' set MM_offset to the last possible record End If End If %> <% ' *** Move To Record: if we dont know the record count, check the display range If (MM_rsCount = -1) Then ' walk to the end of the display range for this page MM_index = MM_offset While (Not MM_rs.EOF And (MM_size < 0 Or MM_index < MM_offset + MM_size)) MM_rs.MoveNext MM_index = MM_index + 1 Wend ' if we walked off the end of the recordset, set MM_rsCount and MM_size If (MM_rs.EOF) Then MM_rsCount = MM_index If (MM_size < 0 Or MM_size > MM_rsCount) Then MM_size = MM_rsCount End If End If ' if we walked off the end, set the offset based on page size If (MM_rs.EOF And Not MM_paramIsDefined) Then If (MM_offset > MM_rsCount - MM_size Or MM_offset = -1) Then If ((MM_rsCount Mod MM_size) > 0) Then MM_offset = MM_rsCount - (MM_rsCount Mod MM_size) Else MM_offset = MM_rsCount - MM_size End If End If End If ' reset the cursor to the beginning If (MM_rs.CursorType > 0) Then MM_rs.MoveFirst Else MM_rs.Requery End If ' move the cursor to the selected record MM_index = 0 While (Not MM_rs.EOF And MM_index < MM_offset) MM_rs.MoveNext MM_index = MM_index + 1 Wend End If %> <% ' *** Move To Record: update recordset stats ' set the first and last displayed record rs_first = MM_offset + 1 rs_last = MM_offset + MM_size If (MM_rsCount <> -1) Then If (rs_first > MM_rsCount) Then rs_first = MM_rsCount End If If (rs_last > MM_rsCount) Then rs_last = MM_rsCount End If End If ' set the boolean used by hide region to check if we are on the last record MM_atTotal = (MM_rsCount <> -1 And MM_offset + MM_size >= MM_rsCount) %> <% ' *** Go To Record and Move To Record: create strings for maintaining URL and Form parameters Dim MM_keepNone Dim MM_keepURL Dim MM_keepForm Dim MM_keepBoth Dim MM_removeList Dim MM_item Dim MM_nextItem ' create the list of parameters which should not be maintained MM_removeList = "&index=" If (MM_paramName <> "") Then MM_removeList = MM_removeList & "&" & MM_paramName & "=" End If MM_keepURL="" MM_keepForm="" MM_keepBoth="" MM_keepNone="" ' add the URL parameters to the MM_keepURL string For Each MM_item In Request.QueryString MM_nextItem = "&" & MM_item & "=" If (InStr(1,MM_removeList,MM_nextItem,1) = 0) Then MM_keepURL = MM_keepURL & MM_nextItem & Server.URLencode(Request.QueryString(MM_item)) End If Next ' add the Form variables to the MM_keepForm string For Each MM_item In Request.Form MM_nextItem = "&" & MM_item & "=" If (InStr(1,MM_removeList,MM_nextItem,1) = 0) Then MM_keepForm = MM_keepForm & MM_nextItem & Server.URLencode(Request.Form(MM_item)) End If Next ' create the Form + URL string and remove the intial '&' from each of the strings MM_keepBoth = MM_keepURL & MM_keepForm If (MM_keepBoth <> "") Then MM_keepBoth = Right(MM_keepBoth, Len(MM_keepBoth) - 1) End If If (MM_keepURL <> "") Then MM_keepURL = Right(MM_keepURL, Len(MM_keepURL) - 1) End If If (MM_keepForm <> "") Then MM_keepForm = Right(MM_keepForm, Len(MM_keepForm) - 1) End If ' a utility function used for adding additional parameters to these strings Function MM_joinChar(firstItem) If (firstItem <> "") Then MM_joinChar = "&" Else MM_joinChar = "" End If End Function %> <% ' *** Move To Record: set the strings for the first, last, next, and previous links Dim MM_keepMove Dim MM_moveParam Dim MM_moveFirst Dim MM_moveLast Dim MM_moveNext Dim MM_movePrev Dim MM_urlStr Dim MM_paramList Dim MM_paramIndex Dim MM_nextParam MM_keepMove = MM_keepBoth MM_moveParam = "index" ' if the page has a repeated region, remove 'offset' from the maintained parameters If (MM_size > 1) Then MM_moveParam = "offset" If (MM_keepMove <> "") Then MM_paramList = Split(MM_keepMove, "&") MM_keepMove = "" For MM_paramIndex = 0 To UBound(MM_paramList) MM_nextParam = Left(MM_paramList(MM_paramIndex), InStr(MM_paramList(MM_paramIndex),"=") - 1) If (StrComp(MM_nextParam,MM_moveParam,1) <> 0) Then MM_keepMove = MM_keepMove & "&" & MM_paramList(MM_paramIndex) End If Next If (MM_keepMove <> "") Then MM_keepMove = Right(MM_keepMove, Len(MM_keepMove) - 1) End If End If End If ' set the strings for the move to links If (MM_keepMove <> "") Then MM_keepMove = Server.HTMLEncode(MM_keepMove) & "&" End If MM_urlStr = Request.ServerVariables("URL") & "?" & MM_keepMove & MM_moveParam & "=" MM_moveFirst = MM_urlStr & "0" MM_moveLast = MM_urlStr & "-1" MM_moveNext = MM_urlStr & CStr(MM_offset + MM_size) If (MM_offset - MM_size < 0) Then MM_movePrev = MM_urlStr & "0" Else MM_movePrev = MM_urlStr & CStr(MM_offset - MM_size) End If %> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Untitled Document</title> </head> <body> <p> </p> <% ' html code: displays the text from "Image_Name" db field on the results.asp page ' "Next" link pages through the results (1 by 1) ' each time it passes a string with the search criteria and the index or offset numbers %> <p><%=(rs.Fields.Item("Image_Name").Value)%></p> <p> </p> <p> <a href="<%=MM_moveNext%>">Next</a></p> <p> </p> <p> </p> <p> </p> </body> </html> <% rs.Close() Set rs = Nothing %>
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Join Date: Jan 2008
Posts: 5
Reputation:
Solved Threads: 0
Hi,
Thanks for the reply. The query string that is being passed each time I click the “Next” link is shown below:
http://localhost/...../results.asp?S...Submit&index=1
This SEEMS to pass the parameters. Does this string look okay to you? Maybe it has not been pieced together correctly?
Thanks again,
Conor
Thanks for the reply. The query string that is being passed each time I click the “Next” link is shown below:
http://localhost/...../results.asp?S...Submit&index=1
This SEEMS to pass the parameters. Does this string look okay to you? Maybe it has not been pieced together correctly?
Thanks again,
Conor
•
•
Join Date: Jan 2008
Posts: 5
Reputation:
Solved Threads: 0
Hi,
Following the suggestion of a member of a different forum, I have fixed the code error.
The code which gets the search values from the FORM on the search page, must be changed so that it also gets the search values passed in the URL query string. Only one of these occurrences will ever happen. The first time the results.asp page is displayed it will use the search values pulled from the FORM. All other times the results.asp page is displayed (because of recordset paging - Next, Previous …) it will use the same search values, but this time pulled from the URL.
Therefore the code:
Must be changed to:
I will also email Dreamweaver to tell them to update their standard record paging behavior code. Thanks to all who replied with help.
Conor
Following the suggestion of a member of a different forum, I have fixed the code error.
The code which gets the search values from the FORM on the search page, must be changed so that it also gets the search values passed in the URL query string. Only one of these occurrences will ever happen. The first time the results.asp page is displayed it will use the search values pulled from the FORM. All other times the results.asp page is displayed (because of recordset paging - Next, Previous …) it will use the same search values, but this time pulled from the URL.
Therefore the code:
ASP Syntax (Toggle Plain Text)
<% Dim rs__SearchValue1 rs__SearchValue1 = "NULL" ' Get search criteria from FORM on the search page (FORM has 2 fields - SearchValue1 and SearchValue2) If (Request.Form("SearchValue1") <> "") Then rs__SearchValue1 = Request.Form("SearchValue1") End If %>
Must be changed to:
ASP Syntax (Toggle Plain Text)
<% Dim rs__SearchValue1 rs__SearchValue1 = "NULL" ' Get search criteria from FORM on the search page (FORM has 2 fields - SearchValue1 and SearchValue2) If (Request.Form("SearchValue1") <> "") Then rs__SearchValue1 = Request.Form("SearchValue1") ' If the FORM field is empty, then look in the URL query string for the old FORM field value Elseif (Request.QueryString("SearchValue1") <> "") Then rs__SearchValue1 = Request.QueryString("SearchValue1") End If %>
I will also email Dreamweaver to tell them to update their standard record paging behavior code. Thanks to all who replied with help.
Conor
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Join Date: Sep 2007
Posts: 1,080
Reputation:
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You should do your best to keep it consistent, searching only one the querystring or form. It won't matter, really, it won't, but I am picky and keep things consistent!
I would just remove the form value and pull from the querystring. Also, you should set up an "only integer" function that will eliminate any characters taht aren't integers. This works well with keeping errors low when people screw with url's. To see what I mean, try typing in something else but an integer in your paging portion of the url.
I would just remove the form value and pull from the querystring. Also, you should set up an "only integer" function that will eliminate any characters taht aren't integers. This works well with keeping errors low when people screw with url's. To see what I mean, try typing in something else but an integer in your paging portion of the url.
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