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Modern day, unicode-friendly .ini file for storing configuration data in VB6

I would like to save the contents of the data structure, several arrays and a dozen variables in a file that can be saved and reloaded by my software, and also possibly edited by the user in a text editor, reloaded. To edit the text, I need the data to be clearly marked, as in a good ole.ini file:

AbsMaxVoltage = 17.5

There is a graphical interface, and it can be argued that the user just needs to download and save and change from the graphical interface, but the client wants to be able to read and modify data in the form of text.

It’s easy to write code to save it and reload it (assuming all the tags are in one place and only the data has changed). With a lot of work (or using some INI R / W code that is already there, I could pay attention to the label, so if the line is deleted or moved around variables, it still fills correctly, but both of these approaches seem pretty old. So, I am interested in how the most modern programming minds would come close to this today (using the ten-year VB6, which I must admit that I still love).

Disclaimer: I am an electrical engineer, not a programmer. This is not my day job. Perhaps this is a few percent of my day job.

Hurrah!

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5 answers

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Jeff Atwood , -, XML , , . , , . , XML , .

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INI VB6:

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
END
Attribute VB_Name = "cInifile"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit
' =========================================================
' Class:    cIniFile
' Author:   Steve McMahon
' Date  :   21 Feb 1997
'
' A nice class wrapper around the INIFile functions
' Allows searching,deletion,modification and addition
' of Keys or Values.
'
' Updated 10 May 1998 for VB5.
'   * Added EnumerateAllSections method
'   * Added Load and Save form position methods
' =========================================================

Private m_sPath As String
Private m_sKey As String
Private m_sSection As String
Private m_sDefault As String
Private m_lLastReturnCode As Long

#If Win32 Then
    ' Profile String functions:
    Private Declare Function WritePrivateProfileString Lib "KERNEL32" Alias
     "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal
     lpKeyName As Any, ByVal lpString As Any, ByVal lpFileName As String) As
     Long
    Private Declare Function GetPrivateProfileString Lib "KERNEL32" Alias
     "GetPrivateProfileStringA" (ByVal lpApplicationName As Any, ByVal
     lpKeyName As Any, ByVal lpDefault As Any, ByVal lpReturnedString As
     String, ByVal nSize As Long, ByVal lpFileName As String) As Long
#Else
    ' Profile String functions:
    Private Declare Function WritePrivateProfileString Lib "Kernel" (ByVal
     lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpString As
     Any, ByVal lpFileName As String) As Integer
    Private Declare Function GetPrivateProfileString Lib "Kernel" (ByVal
     lpApplicationName As String, ByVal lpKeyName As Any, ByVal lpDefault As
     Any, ByVal lpReturnedString As String, ByVal nSize As Integer, ByVal
     lpFileName As String) As Integer
#End If

Property Get LastReturnCode() As Long
    LastReturnCode = m_lLastReturnCode
End Property
Property Get Success() As Boolean
    Success = (m_lLastReturnCode <> 0)
End Property
Property Let Default(sDefault As String)
    m_sDefault = sDefault
End Property
Property Get Default() As String
    Default = m_sDefault
End Property
Property Let Path(sPath As String)
    m_sPath = sPath
End Property
Property Get Path() As String
    Path = m_sPath
End Property
Property Let Key(sKey As String)
    m_sKey = sKey
End Property
Property Get Key() As String
    Key = m_sKey
End Property
Property Let Section(sSection As String)
    m_sSection = sSection
End Property
Property Get Section() As String
    Section = m_sSection
End Property
Property Get Value() As String
Dim sBuf As String
Dim iSize As String
Dim iRetCode As Integer

    sBuf = Space$(255)
    iSize = Len(sBuf)
    iRetCode = GetPrivateProfileString(m_sSection, m_sKey, m_sDefault, sBuf,
     iSize, m_sPath)
    If (iSize > 0) Then
        Value = Left$(sBuf, iRetCode)
    Else
        Value = ""
    End If

End Property
Property Let Value(sValue As String)
Dim iPos As Integer
    ' Strip chr$(0):
    iPos = InStr(sValue, Chr$(0))
    Do While iPos <> 0
        sValue = Left$(sValue, (iPos - 1)) & Mid$(sValue, (iPos + 1))
        iPos = InStr(sValue, Chr$(0))
    Loop
    m_lLastReturnCode = WritePrivateProfileString(m_sSection, m_sKey, sValue,
     m_sPath)
End Property
Public Sub DeleteKey()
    m_lLastReturnCode = WritePrivateProfileString(m_sSection, m_sKey, 0&,
     m_sPath)
End Sub
Public Sub DeleteSection()
    m_lLastReturnCode = WritePrivateProfileString(m_sSection, 0&, 0&, m_sPath)
End Sub
Property Get INISection() As String
Dim sBuf As String
Dim iSize As String
Dim iRetCode As Integer

    sBuf = Space$(8192)
    iSize = Len(sBuf)
    iRetCode = GetPrivateProfileString(m_sSection, 0&, m_sDefault, sBuf, iSize,
     m_sPath)
    If (iSize > 0) Then
        INISection = Left$(sBuf, iRetCode)
    Else
        INISection = ""
    End If

End Property
Property Let INISection(sSection As String)
    m_lLastReturnCode = WritePrivateProfileString(m_sSection, 0&, sSection,
     m_sPath)
End Property
Property Get Sections() As String
Dim sBuf As String
Dim iSize As String
Dim iRetCode As Integer

    sBuf = Space$(8192)
    iSize = Len(sBuf)
    iRetCode = GetPrivateProfileString(0&, 0&, m_sDefault, sBuf, iSize, m_sPath)
    If (iSize > 0) Then
        Sections = Left$(sBuf, iRetCode)
    Else
        Sections = ""
    End If

End Property
Public Sub EnumerateCurrentSection(ByRef sKey() As String, ByRef iCount As Long)
Dim sSection As String
Dim iPos As Long
Dim iNextPos As Long
Dim sCur As String

    iCount = 0
    Erase sKey
    sSection = INISection
    If (Len(sSection) > 0) Then
        iPos = 1
        iNextPos = InStr(iPos, sSection, Chr$(0))
        Do While iNextPos <> 0
            sCur = Mid$(sSection, iPos, (iNextPos - iPos))
            If (sCur <> Chr$(0)) Then
                iCount = iCount + 1
                ReDim Preserve sKey(1 To iCount) As String
                sKey(iCount) = Mid$(sSection, iPos, (iNextPos - iPos))
                iPos = iNextPos + 1
                iNextPos = InStr(iPos, sSection, Chr$(0))
            End If
        Loop
    End If
End Sub
Public Sub EnumerateAllSections(ByRef sSections() As String, ByRef iCount As
 Long)
Dim sIniFile As String
Dim iPos As Long
Dim iNextPos As Long
Dim sCur As String

    iCount = 0
    Erase sSections
    sIniFile = Sections
    If (Len(sIniFile) > 0) Then
        iPos = 1
        iNextPos = InStr(iPos, sIniFile, Chr$(0))
        Do While iNextPos <> 0
            If (iNextPos <> iPos) Then
                sCur = Mid$(sIniFile, iPos, (iNextPos - iPos))
                iCount = iCount + 1
                ReDim Preserve sSections(1 To iCount) As String
                sSections(iCount) = sCur
            End If
            iPos = iNextPos + 1
            iNextPos = InStr(iPos, sIniFile, Chr$(0))
        Loop
    End If

End Sub
Public Sub SaveFormPosition(ByRef frmThis As Object)
Dim sSaveKey As String
Dim sSaveDefault As String
On Error GoTo SaveError
    sSaveKey = Key
    If Not (frmThis.WindowState = vbMinimized) Then
        Key = "Maximised"
        Value = (frmThis.WindowState = vbMaximized) * -1
        If (frmThis.WindowState <> vbMaximized) Then
            Key = "Left"
            Value = frmThis.Left
            Key = "Top"
            Value = frmThis.Top
            Key = "Width"
            Value = frmThis.Width
            Key = "Height"
            Value = frmThis.Height
        End If
    End If
    Key = sSaveKey
    Exit Sub
SaveError:
    Key = sSaveKey
    m_lLastReturnCode = 0
    Exit Sub
End Sub
Public Sub LoadFormPosition(ByRef frmThis As Object, Optional ByRef lMinWidth =
 3000, Optional ByRef lMinHeight = 3000)
Dim sSaveKey As String
Dim sSaveDefault As String
Dim lLeft As Long
Dim lTOp As Long
Dim lWidth As Long
Dim lHeight As Long
On Error GoTo LoadError
    sSaveKey = Key
    sSaveDefault = Default
    Default = "FAIL"
    Key = "Left"
    lLeft = CLngDefault(Value, frmThis.Left)
    Key = "Top"
    lTOp = CLngDefault(Value, frmThis.Top)
    Key = "Width"
    lWidth = CLngDefault(Value, frmThis.Width)
    If (lWidth < lMinWidth) Then lWidth = lMinWidth
    Key = "Height"
    lHeight = CLngDefault(Value, frmThis.Height)
    If (lHeight < lMinHeight) Then lHeight = lMinHeight
    If (lLeft < 4 * Screen.TwipsPerPixelX) Then lLeft = 4 *
     Screen.TwipsPerPixelX
    If (lTOp < 4 * Screen.TwipsPerPixelY) Then lTOp = 4 * Screen.TwipsPerPixelY
    If (lLeft + lWidth > Screen.Width - 4 * Screen.TwipsPerPixelX) Then
        lLeft = Screen.Width - 4 * Screen.TwipsPerPixelX - lWidth
        If (lLeft < 4 * Screen.TwipsPerPixelX) Then lLeft = 4 *
         Screen.TwipsPerPixelX
        If (lLeft + lWidth > Screen.Width - 4 * Screen.TwipsPerPixelX) Then
            lWidth = Screen.Width - lLeft - 4 * Screen.TwipsPerPixelX
        End If
    End If
    If (lTOp + lHeight > Screen.Height - 4 * Screen.TwipsPerPixelY) Then
        lTOp = Screen.Height - 4 * Screen.TwipsPerPixelY - lHeight
        If (lTOp < 4 * Screen.TwipsPerPixelY) Then lTOp = 4 *
         Screen.TwipsPerPixelY
        If (lTOp + lHeight > Screen.Height - 4 * Screen.TwipsPerPixelY) Then
            lHeight = Screen.Height - lTOp - 4 * Screen.TwipsPerPixelY
        End If
    End If
    If (lWidth >= lMinWidth) And (lHeight >= lMinHeight) Then
        frmThis.Move lLeft, lTOp, lWidth, lHeight
    End If
    Key = "Maximised"
    If (CLngDefault(Value, 0) <> 0) Then
        frmThis.WindowState = vbMaximized
    End If
    Key = sSaveKey
    Default = sSaveDefault
    Exit Sub
LoadError:
    Key = sSaveKey
    Default = sSaveDefault
    m_lLastReturnCode = 0
    Exit Sub
End Sub
Public Function CLngDefault(ByVal sString As String, Optional ByVal lDefault As
 Long = 0) As Long
Dim lR As Long
On Error Resume Next
    lR = CLng(sString)
    If (Err.Number <> 0) Then
        CLngDefault = lDefault
    Else
        CLngDefault = lR
    End If
End Function
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XML : -

<config>
    <someAppPart
        AbsMaxVoltage="17.5"
        AbsMinVoltage="5.5"
    />
    <someOtherAppPart
        ForegroundColor="Black"
        BackgroundColor="White"
    />
</config>

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+1

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AbsMaxVoltage=17.5
AbsMinVoltage=5.5

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%Comment: somAppPart settings
someAppPart.AbsMaxVoltage=17.5
someAppPart.AbsMinVoltage=5.5

%someOtherPart settings
someOtherAppPart.ForegroundColor=Black
someOtherAppPart.BackgroundColor=White

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Settings("someOtherAppPart", "ForegroundColor") = "Red"


Settings.Value("someOtherAppPart", "ForegroundColor") = "Red"

, "someOtherAppPart.ForegroundColor" "", . .

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