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Rollback Transactions

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gdkz

Programmer
Nov 21, 2002
44
US
I am using an ASP page to read records from a text file and make multiple entries into a SQL database. I wish this to be an all or nothing entry, if one fails then all the entries will rollback. This seems to work with under 10 records, but fails after that point with the following error message:
[Microsoft][ODBC SQL Server Driver][SQL Server]Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction.
Code:
<%@ TRANSACTION = Required %>
<%'server.ScriptTimeout = 900
<HTML><HEAD>
<META http-equiv=Content-Type content="text/html;">
<META content="MSHTML 6.00.2800.1126" name=GENERATOR>
</HEAD>
<BODY>
<%On error resume next
Dim objFSO,f,strFileName,strTextFile,strRecord,strSQL,rsconn
strFileName = trim(Request.Form("txtFile"))
strTextFile = "d:\web\applications\FixedAssets\pcw\text\" & strFileName	
strNewLoc = "d:\web\applications\FixedAssets\pcw\text\processed\"
Set objFSO = Server.CreateObject("Scripting.FileSystemObject")
Set f = objFSO.OpenTextFile(strTextFile, 1)
if err = 0 then
	Response.Write ("<font color=navy>Writing File to Database...</font><BR>")
	if not f.AtEndOfStream then
		'loop through each line of the text file and write it to the db
		intCount = 0
		do while not f.AtEndOfStream
			strRecord = f.ReadLine
				strRecord = mid(strRecord,8)
				strTransfer_From = left(strRecord,instr(1,strRecord,"|")-1)
				strRecord = mid(strRecord,instr(1,strRecord,"|")+1)
				strTransfer_To = left(strRecord,instr(1,strRecord,"|")-1)
				strRecord = mid(strRecord,instr(1,strRecord,"|")+1)
				strTransfer_Date = strRecord 'left(strRecord,instr(1,strRecord,"|")-1)
				strSQL = "execute VCSFA.dbo.transfer_assets_add '" & strAstId  & "'"
				conn.execute(strSQL)
				'******************** check for errors to rollback transactions 
				If err <> 0 Then
                   			 strError = "Error Saving Line Detail. " & err.description                    
                                	 ObjectContext.SetAbort
       					 conn.close
					set conn=nothing
					f.Close
					Set f=Nothing
					Set objFSO=Nothing
					response.write ("<font color=maroon>There was an error writing to the 					Database.</font> <br>Records attempted: " & intCount -1 & "<br> Error Message: " & 					err.Description & "<br> Failed on: " & strRecord)
					Response.Flush
					response.End

				End if
				'**************************************************

			end if	

		loop
	end if
	Response.flush
	'set rsconn=nothing
else
	f.Close
	Set f=Nothing
	Set objFSO=Nothing
	response.Write ("There was an error reading from text file.<BR>")
	response.Write ("Please make sure that the text file '" & strFileName & "' exists and try again.")
	Response.Flush
	response.end
end if
f.Close
Set f=Nothing
Response.Write "File written to database successfully. <BR>"
Response.Flush
'now move the text file to the processed directory
Set f=objFSO.GetFile(strTextFile)
f.Move(strNewLoc)
if err = 0 then
	Response.Write "Moved '" & strFileName & "' to Processed Directory. <BR>"
	Response.Flush
else
	Response.Write ("There was an error moving file.<BR>")
	Response.write err.Description
	Response.Flush
	Response.end
end if
set f=nothing
Set objFSO=Nothing
'**********************************************************
'commit and rollback code

sub OnTransactionCommit()
                response.write ("Records Committed")
End Sub

 

sub OnTransactionAbort()
                response.write ("Rollback Records")
End Sub 

'**********************************************************
Not sure why I am getting the error message when rolling back more than 10 records? It works fine for small files.



Thanks,
Greg
 
conn object is nowhere declared/included. Copy & paste error?

What kind of SQL Server... and is there any linked server involved in distributed transaction?

------
"There's a man... He's bald and wears a short-sleeved shirt, and somehow he's very important to me. I think his name is Homer."
(Jack O'Neill, Stargate)
[banghead]
 
Yes thanks, conn object was cut during pasting. We are using SQL 7 and no linked server.

Thanks,
Greg
 
I was thinking about KB834849... happened to me once.

Can you use explicit ADO transactions (conn.BeginTrans) instead of MTS? Maybe this helps and coding overhead is not big at all.

------
"There's a man... He's bald and wears a short-sleeved shirt, and somehow he's very important to me. I think his name is Homer."
(Jack O'Neill, Stargate)
[banghead]
 
IMHO ASP Transactions can be kludgey.

Wrap that Logic up in a VB6 COM+ component, where you have better support for Transaction Enforcement and can interface directly with the Object Dispensor.

Just My 2 Cents.
 
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