请问如何读取一个INI文件的SESSION值?

有專門的API函數來讀的。GOOGLE搜索一下吧。

把下面的代码保存为 classIniFile.cls ，然后加入工程。怎么用这个类，不用再多说了吧！:)VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
  Persistable = 0  'NotPersistable
  DataBindingBehavior = 0  'vbNone
  DataSourceBehavior  = 0  'vbNone
  MTSTransactionMode  = 0  'NotAnMTSObject
END
Attribute VB_Name = "Class1"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
Option Explicit'--------classIniFile.cls  代码----------------
'这里定义了一个classIniFile类
'一个绝对经典的在VB中操作.ini文件的通用类源代码Private strINI As StringPrivate 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 String, ByVal lpKeyName As Any, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String) As LongPrivate Function MakePath(ByVal strDrv As String, ByVal strDir As String) As String    '  Makes  an  INI  file:  Guarantees  a  sub  dir
    Do While Right$(strDrv, 1) = "\"
          strDrv = Left$(strDrv, Len(strDrv) - 1)
    Loop

    Do While Left$(strDir, 1) = "\"
          strDir = Mid$(strDir, 2)
    Loop

    '  Return  the  path
    MakePath = strDrv & "\" & strDir
End FunctionPrivate Sub CreateIni(strDrv As String, strDir As String)
    '  Make  a  new  ini  file
    strINI = MakePath(strDrv, strDir)
End SubPublic Sub WriteIniKey(strSection As String, strKey As String, strValue As String)
    '  Write  to  strINI
    WritePrivateProfileString strSection, strKey, strValue, strINI
End SubPublic Function GetIniKey(strSection As String, strKey As String) As String
    Dim strTmp As String
    Dim lngRet As String
    Dim I As Integer
    Dim strTmp2 As String

    strTmp = String$(1024, Chr(32))
    lngRet = GetPrivateProfileString(strSection, strKey, "", strTmp, Len(strTmp), strINI)
    strTmp = Trim(strTmp)
    strTmp2 = ""
    For I = 1 To Len(strTmp)
        If Asc(Mid(strTmp, I, 1)) <> 0 Then
            strTmp2 = strTmp2 + Mid(strTmp, I, 1)
        End If
    Next I
    strTmp = strTmp2

    GetIniKey = strTmp
End FunctionPublic Property Let INIFileName(ByVal New_IniPath As String)
    '  Sets  the  new  ini  path
    strINI = New_IniPath
End PropertyPublic Property Get INIFileName() As String
    '  Returns  the  current  ini  path
    INIFileName = strINI
End Property'***************************************清除KeyWord"键"(Sub)***********************************************
Public Function DelIniKey(ByVal SectionName As String, ByVal KeyWord As String)
    Dim RetVal As Integer
    RetVal = WritePrivateProfileString(SectionName, KeyWord, 0&, strINI)
End Function'如果是清除section就少写一个Key多一个""。
'**************************************清除 Section"段"(Sub)***********************************************
Public Function DelIniSec(ByVal SectionName As String)      '清除section
    Dim RetVal As Integer
    RetVal = WritePrivateProfileString(SectionName, 0&, "", strINI)
End Function

Attribute VB_Name = "ini_old"
Option Explicit'/******************************************************\
'模块说明:
'   INI文件读写for vb
'实现过程:
'      由于98下用api写入后不能立刻变换文件(缓冲问题)
'      所以仿照
'            API WritePrivateProfileString
'            API GetPrivateProfileString
'      采用VB+API试探API INI函数工作原理改写
'      编写了一个
'具体细节有下:
'1:       任何一行先经过trim处理
'      2：如果left(line,1)="["说明为一个section
'         然后往后查找"]"或者该行结束，表示找到一个section
'      3：如果ucase(trim(section))=ucase(trim(section input))
'         说明找到正确的section
'      4：接着往下找key，先找=号。左边为key，右边为value
'      5：如果ucase(trim(key))=ucase(trim(key input))
'         说明找到正确的section
'      6：如果ucase(trim(vale))的被"或者'包括。则取里面数据
'      7：如果在没找key之前发现文件结束，或者找到"["
'         说明里面不包含key
'      -----
'      关于write操作
'8:       如果没找到section文件结束.则开始追加section , Key, Value
'         最后一行(只不包含回车符的一行,下同)经过trim操作后
'         如果为空.则用section , Key, value替换最后一行
'         否则在最后一行下面追加section, Key, Value
'      9: 如果找到了section.
'         找到了key , 则替换该行
'         没找到key , 文件结束(找到最后一行), 或者找到新的section
'         则在该行(最后一行或新的section)前插入section,key,value
'发行:
'      版本 1#
'      日期 2004年3月22日
'      作者胡俊杰
'\******************************************************/'//////////////////////////////////////////////////////////////////////////////////
'函数名:   GetProfile
'函数功能: 读INI
'函数参数: strFileName 文件名, strSection 段, strName 名称
'返回值:   key内容
'完成日期: 2004-3-22
'//////////////////////////////////////////////////////////////////////////////////
Public Function GetProfile(ByVal strFileName As String, ByVal strSection As String, _
                           ByVal strName As String) As String
    On Error GoTo errHandle
    Dim lngFileNumber As Long, pos As Long
    Dim strTemp As String

    'check file exist?
    If Dir(strFileName) = "" Then Exit Function

    lngFileNumber = 0
    lngFileNumber = FreeFile()
    Open strFileName For Input As #lngFileNumber
    strSection = Trim(strSection)
    strName = Trim(strName)

    'try to found section
    Do
        If EOF(lngFileNumber) Then Close #lngFileNumber: Exit Function
        Line Input #1, strTemp
        strTemp = Trim(strTemp)
        If Left(strTemp, 1) = "[" Then
            For pos = 2 To Len(strTemp)
                If Mid(strTemp, pos, 1) = "]" Then Exit For
            Next pos
            If UCase(Trim(Mid(strTemp, 2, pos - 2))) = UCase(strSection) Then Exit Do
        End If
    Loop

    'try to found name
    Do
        If EOF(lngFileNumber) Then Close #lngFileNumber: Exit Function
        Line Input #1, strTemp
        strTemp = Trim(strTemp)
        If Left(strTemp, 1) = "[" Then Close #lngFileNumber: Exit Function
        pos = InStr(1, strTemp, "=", vbTextCompare)
        If pos <> 0 Then
            If UCase(Trim(Left(strTemp, pos - 1))) = UCase(strName) Then Exit Do
        End If
    Loop

    'get value
    GetProfile = Trim(Mid(strTemp, pos + 1))
    If ((Left(GetProfile, 1) = "'" And Right(GetProfile, 1) = "'") Or _
        (Left(GetProfile, 1) = """" And Right(GetProfile, 1) = """")) And Len(GetProfile) >= 2 Then
        GetProfile = Mid(GetProfile, 2, Len(GetProfile) - 2)
    End If

errHandle:
    If lngFileNumber <> 0 Then Close #lngFileNumber
End Function'//////////////////////////////////////////////////////////////////////////////////
'函数名:   SetProfile
'函数功能: 写INI
'函数参数: strFileName 文件名, strSection 段, strName 名称, strSave 内容
'返回值:   是否成功
'完成日期: 2004-3-22
'//////////////////////////////////////////////////////////////////////////////////
Public Function SetProfile(strFileName As String, strSection As String, _
                        strName As String, strSave As String) As Boolean
    On Error GoTo errHandle
    Dim lngFileNumber As Long, pos As Long
    Dim strTemp As String, strFileBak() As String, i As Long, j As Long, mode As Long
    lngFileNumber = 0: mode = 0
    strSection = Trim(strSection)
    strName = Trim(strName)

    'check file exist or filelen = 0?
    If Dir(strFileName) <> "" Then
        If FileLen(strFileName) > 0 Then GoTo lbl_1
    End If
    lngFileNumber = FreeFile
    Open strFileName For Output As #lngFileNumber
    Print #lngFileNumber, "[" & strSection & "]"
    Print #lngFileNumber, strName & " = " & """" & strSave & """"
    Close #lngFileNumber
    SetProfile = True
    Exit Function

lbl_1:
    'read file to buff
    lngFileNumber = FreeFile
    i = 0
    Open strFileName For Input As #lngFileNumber
        Do
            If EOF(lngFileNumber) Then Exit Do
            Line Input #lngFileNumber, strTemp
            ReDim Preserve strFileBak(i)
            strFileBak(i) = Trim(strTemp)
            i = i + 1
        Loop
    Close #lngFileNumber


    'try to found section
    mode = 0
    For i = 0 To UBound(strFileBak)
        If Left(strFileBak(i), 1) = "[" Then
            For pos = 2 To Len(strFileBak(i))
                If Mid(strFileBak(i), pos, 1) = "]" Then Exit For
            Next pos
            If UCase(Trim(Mid(strFileBak(i), 2, pos - 2))) = UCase(strSection) Then Exit For
        End If
    Next i
    If i > UBound(strFileBak) Then GoTo lbl_over

    'try to found name
    mode = 1
    For i = i + 1 To UBound(strFileBak)
        If Left(strFileBak(i), 1) = "[" Then GoTo lbl_over
        pos = InStr(1, strFileBak(i), "=", vbTextCompare)
        If pos <> 0 Then
            If UCase(Trim(Left(strFileBak(i), pos - 1))) = UCase(strName) Then Exit For
        End If
    Next i
    If i > UBound(strFileBak) Then GoTo lbl_over

    'found name
    mode = 2
    'set values
lbl_over:
    'mode 0  found nothing
    'mode 1  found section
    'mode 2  found name
    lngFileNumber = FreeFile
    Open strFileName For Output As #lngFileNumber
    For j = 0 To i - 1
        Print #lngFileNumber, strFileBak(j)
    Next j
    '------------
    If mode = 0 Then        'print section
        Print #lngFileNumber, "[" & strSection & "]"
    End If
    Print #lngFileNumber, strName & " = " & """" & strSave & """"
    '------------
    If i <= UBound(strFileBak) Then  'file not over
        If mode <> 2 Then
            Print #lngFileNumber, strFileBak(i)
        End If
        For j = i + 1 To UBound(strFileBak)
            Print #lngFileNumber, strFileBak(j)
        Next j
    End If
    SetProfile = TrueerrHandle:
    If lngFileNumber <> 0 Then Close #lngFileNumber
End Function

如果你只是要读取ini 的一个小节,很容易的.用WritePrivateProfileSection 函数,就可以达到目的了
'声明api
Private Declare Function WritePrivateProfileSection Lib "kernel32" Alias "WritePrivateProfileSectionA" (ByVal lpAppName As String, ByVal lpString As String, ByVal lpFileName As String) As Long
'把下面的的代码 Private Sub Command1_Click()
    Dim s As String, l As Long, ret As Long
    l = 1024
    s = String(l, Chr(0))
    ret = GetPrivateProfileSection(Section, s, l, IniPath)
    If ret <> 0 Then
        s = Left(s, InStr(s, Chr(0) & Chr(0)) - 1)
    End If
End Sub
's 是你读出来的一个小节的内容
各个key 是已chr(0)分割的.最后一个key 以两个chr(0) 结尾

调试易

请问如何读取一个INI文件的SESSION值?

解决方案 »