24. August 2007 12:54

MS Access: Let lines in Reports grow with it’s content

The problem is the following: You create a report with MS Access with a text field. To display the whole text, you have to set the “CanGrow” property to “Yes” (on the section and on the text-field). When running the report that has vertical lines as column seperator you have an ungly effect: The line keeps its size, as this has been fixed in the design view.

One might think that the easy solution is to adjust this length at runtime. First of all I need to declare what “runtime” means. As this problem occures in every “Detail”-Section we must dive in the events a section provides. There are three of them “OnRetreat”, “OnFormat” and “OnPrint” (apart all the mouse events, which are defenitly not suitable).

The Retreat-Event occurs “when Microsoft Access returns to a previous report section during report formatting” (Source: VBA Help). Not exactly what we’re looking for.

The Format-Event occurs “when Microsoft Access determines which data belongs in a report section, but before Access formats the section for previewing or printing”. It sounds good, but at this point we don’t have our data in the section and are therefore unable to determine the correct height.

Finally the Print-Event “after data in a report section is formatted for printing, but before the section is printed”. Here we are, we have our data which is not yet printed. The problem is that at this point all elements are already formatted, all we can do is add new elements and that’s why we can’t just adjust the height of each line by setting it via

 Me.myLine.Height = Me.Height '''this does not work in the OnPrint event, myLine has already been formatted

The simple solution is to draw a new line and use your already placed line as a template:

Private Sub Detail_Print(Cancel As Integer, PrintCount As Integer)
    Dim EndOfLine As Double
    EndOfLine = Me.Height       ''height of section (where the line stops)

    ''becasue it's not allowed in such a late state to change lines, we draw new one's based on the old
    ''myLine
    Me.Line (Me.myLine.Left, 0)-(Me.myLine.Left, EndOfLine)

End Sub;

Tags:  MS Access  VBA  Programming 
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14. May 2007 14:49

Convert fixed length column to Excel

I had to convert the output from sqlplus to an excel sheet. The problem was, that I had no influence on the creation, so I could spool the file directly to excel.

All I got were spool files like that:

      CLASS_ID SUPER_CLASS_ID   COUNT(*)
============== ============== ==========
       128           8765         18
       128           8765        131
       128           8765          7

My idea was to take the line used to seperate the column titles and the data as the data that gives me the length of each column (refered as the column line in my function below). Then just simply extract a block from start to end (as given) based on the gathered column length information.

Maybe someone can use this piece of VBA code:

Public Sub convertFixed()
    Dim sFile As String
    Dim iCount As Long
    Dim iSubCount As Long
    Dim iLastCount As Long
    Dim i As Integer
    Dim Length() As Integer
    Dim sValue As String

    Dim iStart As Integer
    Dim iEnd As Integer
    Dim iColumn As Integer


    ''clear previous data
    Cells.ClearContents

    ''choose the file with the windows file dialog
    With Application.FileDialog(msoFileDialogFilePicker)
    .AllowMultiSelect = False
    .Title = "Choose log file to convert"
    .InitialFileName = ThisWorkbook.Path
    .InitialView = msoFileDialogViewDetails
    .Filters.Clear

    ''the filter is set to .log .spool and .txt files
    .Filters.Add "Log file", "*.log, *.spool, *.txt"

    .ButtonName = "Load"
    If .Show = -1 Then
        sFile = .SelectedItems(1)
    Else
        ''stop execution if no file is selected
        Exit Sub
    End If
    End With


    ''we need the following informtion (gather with InputBoxes)
    ''line to scan the column lengh (space delimiteted) -> line number
    ''begin of block (line number)
    ''end of block (line number)
    iStart = InputBox("Enter line number where block starts:", "Line number of Start")
    iEnd = InputBox("Enter line number where block ends:", "Line number of End")
    iColumn = InputBox("Enter line number of fixed length specification", "Line number for fixed length")

    ''the first loop is to get the correct column length
    'open the file
    Open sFile For Input Access Read As #1
    iCount = 1
    ''loop until end of file (EOF) is reached
    Do Until EOF(1)
    Line Input #1, sLine
    If (iCount = iColumn) Then
        ''exit if the column line (to scan the length) is reached
        Exit Do
    End If
    iCount = iCount + 1
    Loop
    ''close the file
    Close #1

    iCount = 0
    iSubCount = 1
    iLastCount = 0
    ''sLine now contains a line that gives us the fixed length of the columns
    sLine = RTrim(sLine)
    Do Until iSubCount > Len(sLine)
    If (Mid(sLine, iSubCount, 1) = " " Or iSubCount = Len(sLine)) Then
        ''the Length array stores the length of each column (needs to be ReDim'ed with each new column)
        ReDim Preserve Length(iCount)
        Length(iCount) = iSubCount - iLastCount
        iLastCount = iSubCount
        iCount = iCount + 1
    End If
    iSubCount = iSubCount + 1
    Loop

    ''open the file to extract the block based on the column length stored in the Length-Array
    Open sFile For Input Access Read As #1
    iCount = 1
    iSubCount = 1

    ''loop until the end of the block is reached
    Do Until iCount > iEnd
    Line Input #1, sLine
    iLastCount = 1
    If (iCount >= iStart) Then
        For i = 0 To UBound(Length)
            sValue = Trim(Mid(sLine, iLastCount, Length(i)))
            ''prevent application errors with adding of "'" in front of special characters
            If (Left(sValue, 1) = "=" Or Left(sValue, 1) = "-" Or Left(sValue, 1) = "+") Then
                sValue = "'" & sValue
            End If
            ''insert the data to the current Excel sheet
            Cells(iSubCount, i + 1).Value = sValue
            iLastCount = iLastCount + Length(i)
        Next i
        iSubCount = iSubCount + 1
    End If
    iCount = iCount + 1
    Loop
    ''close the file
    Close #1

End Sub

Tags:  Excel  VBA  Programming 
Comments