Question

Using a RS.GetString to then get a value from a lookup table

Asked by: net-workx

Ok i have a previous question: http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/ASP/Q_23508088.html

which was answered correctly and did the first step of what i need to do, however now though i need to take it another step...

on the code example below there is a line which says: TextStream.WriteLine RS.GetString(,,",", vbcrlf, "")

Now this works fine and outputs into the CSV file the correct values into each field however fields such as intCategoryID and intSubCategoryID etc are index ID fields which lookup the actual value from another table.  Is it possible to now change the output that get written into a csv/tab delimited file so that it looks up the correct value from the relevant table and now just output an ID number?

For example instead of the output being:
1001, PARTNO, 1, 2
it would be
1001, PARTNO, MYCATEGORY, MYSUBCATEGORY

Thanks,
Carl

'//RETRIVES THE FIELDS SELECTED FROM THE MULTI SELECT BOX (Step1)
strSelected = Request.Form("SelectedFields")
 
'//CREATES THE SQL STATEMENT TO RETRIVE THE CORRECT FIELDS FROM THE DB
strSQL = "SELECT " & strSelected & " FROM tblProducts WHERE intActiveProduct = 1"
 
'//REPLACES ALL OF THE FIELD NAMES WITH USER FRIENDLY FIELD NAMES TO GIVE ME A STRING
'//FOR THE CSV FILE HEADER LINE
strHeader = Replace(strSelected, "intProductID", "ProductID")
strHeader = Replace(strHeader, "txtProductCode", "ProductCode")
strHeader = Replace(strHeader, "intCategoryID", "Category")
strHeader = Replace(strHeader, "intSubCategoryID", "SubCategory")
strHeader = Replace(strHeader, "intSubCategory1ID", "SecondaryCategory1")
strHeader = Replace(strHeader, "intSubCategory2ID", "SecondaryCategory2")
strHeader = Replace(strHeader, "intCategoryFeature", "CategoryFeature")
strHeader = Replace(strHeader, "intCostPrice", "CostPrice")
strHeader = Replace(strHeader, "intRetailPrice", "RetailPrice")
strHeader = Replace(strHeader, "txtProductName", "ProductName")
strHeader = Replace(strHeader, "intManufacturer", "Manufacturer")
strHeader = Replace(strHeader, "txtManufacturerPartNumber", "ManufacturerPartNo")
strHeader = Replace(strHeader, "txtModelNumber", "ModelNumber")
strHeader = Replace(strHeader, "intWeight", "Weight")
strHeader = Replace(strHeader, "txtProductDescription", "Description")
strHeader = Replace(strHeader, "intStockOnHand", "StockOnHand")
strHeader = Replace(strHeader, "intMinimumStockLevel", "MinStockLevel")
strHeader = Replace(strHeader, "intActiveProduct", "ActiveProduct")
strHeader = Replace(strHeader, "intWebProduct", "WebProduct")
strHeader = Replace(strHeader, "intFeaturedProduct", "FeaturedProduct")
strHeader = Replace(strHeader, "txtShortDescription", "ShortDescription")
strHeader = Replace(strHeader, "intBestSeller", "BestSeller")
strHeader = Replace(strHeader, "txtBarCode", "BarCode")
strHeader = Replace(strHeader, "intVatCode", "VatRate")
strHeader = Replace(strHeader, "intRRP", "RRP")
strHeader = Replace(strHeader, "txtSeoTitle", "SEOTitle")
strHeader = Replace(strHeader, "txtMetaKeywords", "SEOKeywords")
strHeader = Replace(strHeader, "txtMetaDescription", "SEODescription")
strHeader = Replace(strHeader, "txtPackSize", "PackSize")
strHeader = Replace(strHeader, "txtMemo", "Memo")
 
 
'//REPLACES ALL OF THE COMMAS FOR THE TABBED HEADER LINE
strTabbedHeader = Replace(strHeader, ",", chr(9))
 
'//IF THE FILETYPE IS TAB DELIMITED THEN RUN THIS SCRIPT
IF intFileType = 1 THEN
	txtFileName = txtFileName & ".txt"
	
		Set fso = Server.CreateObject("Scripting.FileSystemObject")
		path = Server.MapPath(strDownloadCatalogueWebPath)
		Set fldr = fso.GetFolder(path)
		Set TextStream = fldr.CreateTextFile(txtFileName)
			Set RS = Server.CreateObject("ADODB.Recordset")
			RS.Open SQL,Connection,3,3
			TextStream.WriteLine strTabbedHeader
			TextStream.WriteLine RS.GetString(,,chr(9),vbCrlf,"")
			RS.Close
			Set RS = Nothing
		TextStream.Close
'//ELSE CREATE THE CSV FILE TYPE
ELSE
	txtFileName = txtFileName & ".csv"
	
		Set fso = Server.CreateObject("Scripting.FileSystemObject")
		path = Server.MapPath(strDownloadCatalogueWebPath)
		Set fldr = fso.GetFolder(path)
		Set TextStream = fldr.CreateTextFile(txtFileName)
			Set RS = Server.CreateObject("ADODB.Recordset")
			RS.Open strSQL,Connection,3,3
			TextStream.WriteLine strHeader
			TextStream.WriteLine RS.GetString(,,",", vbcrlf, "")
			RS.Close
			Set RS = Nothing
		TextStream.Close
END IF

                                  
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Asked On
2008-06-24 at 04:06:42ID23510500
Tags

ASP Classic

,

IE

Topics

Active Server Pages (ASP)

,

Miscellaneous Programming

Participating Experts
2
Points
500
Comments
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Answers

 

by: neeraj523Posted on 2008-06-24 at 04:24:59ID: 21854421

yes.. this is easily achieveable.. but you need to tell the table strcuture of your category tables to pull the relevant category names from it..

then you need to write a join query and pull all needed info and print as desired..

 

by: net-workxPosted on 2008-06-30 at 06:48:18ID: 21899078

hi im still strugging a bit with this....

i havnt got a clue where to start with the line:

TextStream.WriteLine RS.GetString(,,",", VbCrLf, "")

from in there do i have to create a connection to the other table  (tblProductCategories) to retreive the txtCategoryName value?

Thanks,
Carl

 

by: DanRollinsPosted on 2008-07-02 at 20:38:55ID: 21922537

Right now your variable
  strSelected
probably looks something like:
   txtProductCode, intCategoryID, txtShortDescription,  (etc.)
and that gets incorporated into the SELECT string that obtains the data.  Your SELECT statement probably looks something like:  

    SELECT txtProductCode, intCategoryID, txtShortDescription
    FROM tblProducts WHERE intActiveProduct = 1

 If you want ot replace, for instance, intCategoryID with something from a lookup table (e.g., "Red Widgets") you need a more complicated (compound) SELECT statement.  For instance:

    "SELECT " &
       "txtProductCode, " &
        (SELECT sCatagoryName FROM CatagoryNameTbl WHERE nID=" & intCategoryID & ")," &
        "txtShortDescription " &
    "FROM tblProducts WHERE intActiveProduct = 1"

Which as one line will look like
    SELECT txtProductCode, (SELECT sCatagoryName FROM CatagoryNameTbl WHERE nID=77), txtShortDescription FROM tblProducts WHERE intActiveProduct = 1

 

by: net-workxPosted on 2008-07-08 at 15:08:22ID: 21958770

Excellent i think that makes sense, I shall test tommorow and let you know how i get on with the compound select statement.

 

by: net-workxPosted on 2008-07-09 at 08:11:25ID: 21964513

Ok the problem i have have run into is that the the strSelected string is automatically created by using the users input.. which means that im unable to change the strSeleted before it have been included in the code.

I have changed the code so be:

strSQL = Replace(strHeader, "intCategoryID", (SELECT txtCategoryName FROM tblProductCategories WHERE ID = " & intCategoryID)

but get syntax error at the firts bracket before the SELECT

 

by: DanRollinsPosted on 2008-07-09 at 14:23:12ID: 21968538

You forgot to enter the leading double-quote character used to delineate the start of a string.

 

by: DanRollinsPosted on 2008-07-09 at 14:41:39ID: 21968667

>> the strSelected string is automatically created by using the users input..

BTW, you should be very careful about allowing user input to be made into an SQL statement.  It opens the door to an malicious exploit...  For instance, if I entered my last name as:
  Rollins";DELETE FROM Customer;
then an update command might look like:
   UPDATE MyTbl Set LastName="Rollins";DELETE FROM Customer;
which would wipe out the entire Customer table.

 

by: net-workxPosted on 2008-07-10 at 09:11:39ID: 21974870

sorry i missed that! change it now to:

strSQL = Replace(strHeader, "intCategoryID", ("SELECT txtCategoryName FROM tblProductCategories WHERE ID = " & intCategoryID))

When running i now get an error:

Microsoft OLE DB Provider for ODBC Drivers error '80040e0c'
Command text was not set for the command object.

its on line 124 which is:

RS.Open strSQL,Connection,3,3

Its turning out to be harder to do than i first thought!

 

by: DanRollinsPosted on 2008-07-10 at 14:57:51ID: 21977740

The leading and trailing parentheses () are part of the secondary SELECT statement.

20120131-EE-VQP-002

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