Thursday, August 8, 2013

How to Make an Excel Fixed Width File from SWMM 5

How to Make an Excel Fixed Width File from SWMM 5

You can use this macro for MATLAB or some other DOS based program by using the Tools command of SWMM 5 and configuring the EXCEL file option.  If you use the EXCEL tool then your SWMM 5 input file will be opened up in EXCEL and you can use this macro to make a fixed format file for SWMM 5.  Note, SWMM 5 does not use fixed format but other programs may need it for reading,  You adjust the column widths in the macro for your program.

Here is the macro, which is placed  in Excel using these command:
  1. Copy the code above.
  2. Open Excel.
  3. Alt + F11 to open the Visual Basic Editor.
  4. Click Insert-Module from the menu.
  5. Paste the code into the window that appears at right.
Option Explicit

Sub CreateFixedWidthFile(strFile As String, ws As Worksheet, s() As Integer)
    Dim i As Long, j As Long
    Dim strLine As String, strCell As String
     'get a freefile
    Dim fNum As Long
    fNum = FreeFile
     'open the textfile
    Open strFile For Output As fNum
     'loop from first to last row
     'use 2 rather than 1 to ignore header row
    For i = 1 To ws.Range("a65536").End(xlUp).Row
         'new line
        strLine = ""
         'loop through each field
        For j = 0 To UBound(s)
             'make sure we only take chars up to length of field (may want to output some sort of error if it is longer than field)
            strCell = Left$(ws.Cells(i, j + 1).Value, s(j))
             'add on string of spaces with length equal to the difference in length between field length and value length
            strLine = strLine & strCell & String$(s(j) - Len(strCell), Chr$(32))
        Next j
         'write the line to the file
        Print #fNum, strLine
    Next i
     'close the file
    Close #fNum
End Sub

 'for example the code could be called using:

Sub CreateFile()
    Dim sPath As String
    sPath = Application.GetSaveAsFilename("SWMM5_Fixed_EXPORT", "Text Files,*.inp")
    If LCase$(sPath) = "false" Then Exit Sub
     'specify the widths of our fields
     'the number of columns is the number specified in the line below +1
    Dim s(15) As Integer
     'starting at 0 specify the width of each column for the SWMM5 File, alter the columns if you need more columns in your data input file
    s(0) = 40
    s(1) = 20
    s(2) = 20
    s(3) = 20
    s(4) = 20
    s(5) = 20
    s(6) = 20
    s(7) = 20
    s(8) = 20
    s(9) = 20
    s(10) = 20
    s(11) = 20
    s(12) = 20
    s(13) = 20
    s(14) = 20
    s(15) = 20
     'for example to use 3 columns with field of length 5, 10 and 15 you would use:
    'dim s(2) as Integer
     'write to file the data from the activesheet
    CreateFixedWidthFile sPath, ActiveSheet, s
End Sub

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