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Readline is reading entire text document

Posted on 2009-03-30
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Last Modified: 2012-05-06
I have two ASP Scripts. One creates a text file of data from a database. The second file calls that first file then opens the text file that it created.
 
  What I am struggling with is just gabbing the first line of the text file (it contains my column names). When I use ReadLine it is reading the entire text file and not just the first line. If I open the text file in notepad, all the data is on separate lines as it should be.
 
  So, I am thinking that I am either not writing the line feeds properly or I am not using the ReadLine method properly.
 
  The code is below (in the next two comments fields). The CreateFile.asp is the file that creates the data file. The GetData.asp file is the one that proccesses the file.

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Question by:swinslow
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8 Comments
 
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Author Comment

by:swinslow
ID: 24022520
CreateFile.asp
 <%
  Server.ScriptTimeout = 9999
  Response.Expires = 0
  Response.Expiresabsolute = Now() - 1
  Response.AddHeader "pragma","no-cache"
  Response.AddHeader "cache-control","private"
  Response.CacheControl = "no-cache"
  Response.Buffer = False
  Response.ContentType = "text/tab-separated-values"
  Response.AddHeader "content-disposition", "inline; filename=SalesOrders.tsv"
 
 
  Set ObjFSO = Createobject("Scripting.FileSystemObject")
  Set objRS = Server.CreateObject ("ADODB.RecordSet")
 
  SqlStr = "SELECT * " & _
           "FROM SalesOrders " & _
           "ORDER BY SONum DESC "
  objrs.Open SqlStr, SOConStr, adOpenStatic, adLockOptimistic,adCmdText
  For Each ColumnName in Objrs.Fields
     Response.Write ColumnName.Name & chr(9)
  Next
  While Not Objrs.EOF
     'Create line feed
     Response.Write chr(13) & chr(10)
     For Each ColumnName in Objrs.Fields
        Response.Write ColumnName.value & chr(9)
     Next
  Objrs.MoveNext
  Wend
  objrs.Close
  
 
  Set objrs = Nothing
  Set ObjFSO = Nothing
  %>

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Author Comment

by:swinslow
ID: 24022529
GetData.asp
<%
    Server.ScriptTimeout = 9999
    Response.Buffer = False
    SaveToFolder = "D:\Temp\"
    TheURL = "http://infopage.cummins.com/InfoPage/Forms/SalesOrders/Export/SalesOrders.asp"
    SaveAs = "SalesOrders.tsv"
    
    Set xmlHTTP = CreateObject("MSXML2.ServerXMLHTTP")
    SaveAsFile = SaveToFolder & SaveAs
    xmlHTTP.open "GET", TheURL, false
    xmlHTTP.send()
    If xmlHttp.Status = "200" AND xmlHttp.Status <> "404" then
       Set DataStream = CreateObject("ADODB.Stream")
         DataStream.Open
         DataStream.Type = 1
         DataStream.Write xmlHTTP.ResponseBody
         DataStream.Position = 0
         DataStream.SaveToFile SaveAsFile
         DataStream.Close
       Set DataStream = Nothing
    End If
    Set xmlHTTP = Nothing
 
   Set ObjFSO = Createobject("Scripting.FileSystemObject")
   Set DataFile = ObjFSO.OpenTextFile(SaveToFolder & SaveAs)
 
   'This SHOULD read just the first line of the file
   'But it isnt
   ColumnNamesLine = DataFile.ReadLine
   Response.Write ColumnNamesLine & "<hr>"
 
   Set DataFile = Nothing
   Set ObjFSO = Nothing
 %>

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Accepted Solution

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RobSampson earned 300 total points
ID: 24034378
Hi, this might be because of the way you're writing the carriage return in the write section.

Try changing this bit:
Response.Write chr(13) & chr(10)

to this
Response.Write vbCrLf

Regards,

Rob.
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Author Comment

by:swinslow
ID: 24078772
I gave that a try and I still had the same result.
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Assisted Solution

by:RobSampson
RobSampson earned 300 total points
ID: 24082496
OK, this section doesn't appear to actually "create" a file:

  For Each ColumnName in Objrs.Fields
     Response.Write ColumnName.Name & chr(9)
  Next
  While Not Objrs.EOF
     'Create line feed
     Response.Write chr(13) & chr(10)
     For Each ColumnName in Objrs.Fields
        Response.Write ColumnName.value & chr(9)
     Next
  Objrs.MoveNext
  Wend
  objrs.Close



Try the below in place of that section.

Regards,

Rob.
Set objOutput = objFSO.CreateTextFile("myoutput.txt", True)
  For Each ColumnName in Objrs.Fields
     objOutput.Write ColumnName.Name & chr(9)
  Next
  While Not Objrs.EOF
     'Create line feed
     objOutput.Write vbCrLf
     strLine = ""
     For Each ColumnName in Objrs.Fields
        If strLine = "" Then
          strLine = ColumnName.value
        Else
          strLine = strLine & Chr(9) & ColumnName.value
        End If
     Next
     objOutput.Write strLine
  Objrs.MoveNext
  Wend
  objrs.Close

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LVL 4

Author Comment

by:swinslow
ID: 24082883
You are right, it doesnt actually create a file. It is virtual. The reason I am not creating an actual physical file is that both scripts will be on different servers. The GetData.asp file will be run by the end user to get the absolute most current data and transfer it to his server (using xmlhttp). If I went with a script that created an actual file, then I would need another script to call that file and somehow schedule it (which since the website is hosted would be impossible).

But anyway.... you did give me an idea and it worked. It makes absolutley no sense at all, but in the CreateFile.asp I changed the file name from a tsv file to a txt file and it works.
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Author Closing Comment

by:swinslow
ID: 31564507
I used partial pieces of your suggestions along with coming up with some other ideas based on your suggestions to get the final solution.
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LVL 65

Expert Comment

by:RobSampson
ID: 24083066
Hmmm, tsv to txt....odd....perhaps it the way the system "expected" to read a tsv......as opposed to txt, which is just "whatever goes".

Anyway, glad you got it sorted.

Regards,

Rob.
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