ASP的生成指定格式的GUID

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' ===========================================
' ASP获取GUID,有可选生成形式
' 并返回处理后的结果
' 例子:
' Dim guid
' guid = getGUID(0) '系统默认形式(40位,大写形式)
' guid = getGUID("36") '不含{}号(大写形式)
' guid = getGUID("32:L") '不含{}及-号,小写形式
' guid = getGUID("34:U") '不含-号,大写形式
' ===========================================
' 参数如下：
' sOption :生成的格式设置,格式为"length:case",系统生成的为40位带{,},-的格式的大写形式
' length可指定为36,34,32则分别代表去除{},去除-,去除{}-
' case可指定大小写形式,可以是U代表大写形式,L代表小写形式
Function getGUID(ByVal sOption)
    On Error Resume Next
    'Raise 1
    sOption = Trim(""&sOption)
    Dim sTmp,oGUID
    Set oGUID = CreateObject("Scriptle"&"t.T"&"ypeLib")
    ' 系统缺少或禁止Scriptlet.TypeLib组件时(采用模拟时间串+随机数字字母)
    If 0<> Err Then
        Err.Clear
        Dim strSeed, seedLength, pos, Str, i,NowNums,tmpNow
        tmpNow = 10^10*Year(Now)+10^8*Month(Now)+10^6*Day(Now)+10^4*Hour(Now)+10^2*Minute(Now)+10^0*Second(Now)
        NowNums = tmpNow 
        strSeed = "ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890" 
        seedLength = Len(strSeed) 
        Str = "" 
        Randomize 
        For i = 1 To 18
            Str = Str & Mid(strSeed, Int(seedLength * Rnd) + 1, 1) 
            Select Case Left(sOption, 2)
            Case "36" ' 不包含{号和}号
                If i=2 Then NowNums = Left(tmpNow,8)& "-" & Mid(tmpNow,9,4)&"-" & Right(tmpNow,2)
                If i=2 Or i=6 Then Str = Str & "-"
            Case "34" ' 不包含-号
            Case "32" ' 不包含{,},-号
            Case Else
                If i=2 Then NowNums = Left(tmpNow,8)& "-" & Mid(tmpNow,9,4)&"-" & Right(tmpNow,2)
                If i=2 Or i=6 Then Str = Str & "-"
            End Select
        Next 
        getGUID = NowNums&Str
        Select Case Left(sOption, 2)
            Case "36" ' 不包含{号和}号
            Case "34" ' 不包含-号
                getGUID = "{" & getGUID & "}"
            Case "32" ' 不包含{,},-号
            Case Else
                getGUID = "{" & getGUID & "}"
        End Select
            
        Exit Function
    End If
    sTmp = Trim(oGUID.Guid)
    Set oGUID = Nothing
    Select Case Left(sOption, 2)
        Case "36" ' 不包含{号和}号
            sTmp = Mid(sTmp, Instr(sTmp,"{")+1, 36)
        Case "34" ' 不包含-号
            sTmp = Replace(sTmp, "-", "")
        Case "32" ' 不包含{,},-号
            sTmp = Mid(sTmp, Instr(sTmp,"{")+1, 36)
            sTmp = Replace(sTmp, "-", "")
        Case Else
        ' sth. to do...
    End Select
    
    '处理其它可选项
    If Len(sOption) > 1 And Instr(sOption,":") > 0 Then
        sOption = Split(sOption, ":")
        ' 处理大小写形式
        Select Case UCase(Trim(""&sOption(1)))
        Case "U"
            sTmp = UCase(sTmp)
        Case "L"
            sTmp = LCase(sTmp)
        Case Else
        ' sth. to do...
        End Select
    End If
    getGUID = sTmp
End Function
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