VB6實現(xiàn)MUI程序方法詳解
本文將為大家詳細講述的是VB6實現(xiàn)MUI程序方法,希望本文能給大家的日常開發(fā)工作帶來一些啟示。
之前,我負責一個VB6編寫的辦公自動化系統(tǒng),要求能在運行時,支持在不同語言間切換(英文,中文,日文,德文,法文和西班牙文);實質(zhì)就是實現(xiàn)一個VB6的MUI程序.
這個需要的困難在于VB6顯示文本的標準控件(Label,Textbox等)不支持Unicode;但字符串在其內(nèi)部是按Unicode保存的,也就是說VB6本身是支持Unicode的.
VB6中,標準控件顯示字符串的過程如下:
1) 標準控件先將Unicode字符串轉(zhuǎn)換成ANSI字符串;
2) 標準控件嘗試將ANSI字符串轉(zhuǎn)換成其Font.Charset屬性中指定的字符集格式的字符串;如果轉(zhuǎn)換失敗,則顯示為問號(?).
具體可參照:Display Unicode Strings in Visual Basic 6.0.
因此,實現(xiàn)MUI程序的思路有兩種:
1) 將標準控件替換為能支持Unicode的控件;
2) 將資源文件中不同字符集的文本,轉(zhuǎn)換為ANSI格式,提供給標準控件使用;
第1)種方式可用 Forms 2.0 (fm20.dll);
第2)種方式,我在網(wǎng)上找到兩篇文章,但各有不足:
a) Auto-Detect Language and Display Unicode in VB6 TextBox and Label Controls;
ChilkatCharset2控件需購買,具對日文的一些標點符號(如全角句號)不支持.
b) How To Convert from ANSI to Unicode & Unicode to ANSI for OLE
沒有測試成功.
下面,著重介紹我自己認為比較成功的實現(xiàn),它使用了ADODB.Stream(msado25.tlb);其實現(xiàn)思路如下:
1) 將程序中用到的文本保存為Unicode格式的資源文件中;
之所以將資源文本保存為雙字節(jié)的Unicode格式,而非Utf8或Utf7格式,可省去從其它格式向VB6支持的Unicode格式轉(zhuǎn)換過程.
2) 將顯示文本的標準控件的Font.Charset,設置為程序要顯示語言所對應的字符集,并設置一種支持這種字符集的字體到Font.Name屬性
- If g_Str.NumJapanese > 0 Then
- charset = "Shift_JIS"
- Text1.Font.Name = "MS UI Gothic"
- Text1.Font.charset = 128
- ElseIf g_Str.NumKorean > 0 Then
- charset = "ks_c_5601-1987"
- Text1.Font.Name = "GulimChe"
- Text1.Font.charset = 129
- ElseIf g_Str.NumCentralEuro > 0 Then
- charset = "windows-1250"
- Text1.Font.Name = "Arial"
- Text1.Font.charset = 238
- ElseIf g_Str.NumArabic > 0 Then
- charset = "windows-1256"
- Text1.Font.Name = "Traditional Arabic"
- Text1.Font.charset = 178
- ElseIf g_Str.NumHebrew > 0 Then
- charset = "windows-1255"
- Text1.Font.Name = "David"
- Text1.Font.charset = 177
- ElseIf g_Str.NumCyrillic > 0 Then
- charset = "windows-1251"
- Text1.Font.Name = "Arial"
- Text1.Font.charset = 204
- ElseIf g_Str.NumGreek > 0 Then
- charset = "windows-1253"
- Text1.Font.Name = "Arial"
- Text1.Font.charset = 161
- ElseIf g_Str.NumThai > 0 Then
- charset = "windows-874"
- Text1.Font.Name = "Angsana New"
- Text1.Font.charset = 222
- ElseIf g_Str.NumChinese > 0 Then
- charset = "gb2312"
- Text1.Font.Name = "SimSun"
- Text1.Font.charset = 134
- ' An alternative is to use Big5:
- ' Text1.Font.Name = "MingLiu"
- 'charset = "big5"
- 'fontCh = 136
- Else
- charset = "windows-1252"
- Text1.Font.charset = 0
- Text1.Font.Name = "Arial"
- End If
3) 根據(jù)要顯示的語言,利用ADODB.Stream將資源文件中Unicode格式保存的字符串轉(zhuǎn)換成操作系統(tǒng)的區(qū)域語言(Locale)支持字符集的字符串;
- ' 調(diào)用API來獲取操作系統(tǒng)默認的區(qū)域語言設置(LocaleID)
- Private Declare Function GetSystemDefaultLCID Lib "kernel32" () As Long
- ' 將Unicode字符串,轉(zhuǎn)換為指定字符集的字節(jié)數(shù)組;
- ' 用于轉(zhuǎn)換用資源文件中讀取的文本;
- Public Function ConvertStringToBytes(ByRef strText As String, charset As String) As Byte()
- Dim objStream As ADODB.Stream
- Dim data() As Byte
- ' init stream
- Set objStream = New ADODB.Stream
- objStream.charset = charset
- objStream.Mode = adModeReadWrite
- objStream.Type = adTypeText
- objStream.Open
- ' write bytes into stream
- objStream.WriteText strText
- objStream.Flush
- ' rewind stream and read text
- objStream.Position = 0
- objStream.Type = adTypeBinary
- ' objStream.Read 3 ' skip first 3 bytes as this is the utf-8 marker
- data = objStream.Read()
- ' close up and return
- objStream.Close
- ConvertStringToUtf8Bytes = data
- End Function
- ' 轉(zhuǎn)換為指定字符集的字節(jié)數(shù)組,轉(zhuǎn)換為ANSI(即LocaleID)對應的字符集的字符串;
- ' 用于將ConvertStringToBytes()返回的字節(jié)數(shù)組轉(zhuǎn)換為GetCharset()字符集的字符串.
- Public Function ConvertBytesToString(ByRef data() As Byte, charset As String) As String
- Dim objStream As ADODB.Stream
- Dim strTmp As String
- ' init stream
- Set objStream = New ADODB.Stream
- objStream.charset = charset
- objStream.Mode = adModeReadWrite
- objStream.Type = adTypeBinary
- objStream.Open
- ' write bytes into stream
- objStream.Write data
- objStream.Flush
- ' rewind stream and read text
- objStream.Position = 0
- objStream.Type = adTypeText
- strTmp = objStream.ReadText
- ' close up and return
- objStream.Close
- ConvertUtf8BytesToString = strTmp
- End Function
- '獲取操作系統(tǒng)默認區(qū)域語言對應的字符集
- Public Function GetCharset() As String
- Dim localeId As Long
- Dim charset As String
- ' 獲取操作系統(tǒng)的LocaleId
- localeId = GetSystemDefaultLCID()
- Select Case localeId
- Case 1033
- charset = "windows-1252"
- Case 2052
- charset = "gb2312"
- Case 1041
- charset = "Shift_JIS"
- Case Else
- charset = "windows-1252"
- End Select
- GetCharset = charset
- End Function
- '顯示資源文本中的文本
- Private Sub DisplayText(filename As String)
- '保存資源文本中的文本的變量
- Dim textBytes As Variant
- Dim f As New FileSystemObject
- Dim fs As TextStream
- '將Unicode文本讀取到變量中
- Set fs = f.OpenTextFile(filename, ForReading, False, TristateTrue)
- Do While Not fs.AtEndOfStream
- textBytes = fs.ReadAll
- Loop
- fs.Close
- ' Convert to a Unicode string:
- Dim s As String
- s = textBytes
- Dim t As Long
- ' CkString是免費的第三方組件,可自動判定一個字符串所對應的字符集
- ' 下載地址:http://www.chilkatsoft.com/download/CkString.zip
- Dim g_Str As New CkString
- g_Str.Str = s
- '獲取資源文本所代表的字符集名稱,設置對應的字體和字符集到textbox上
- Dim charset As String
- If g_Str.NumJapanese > 0 Then '日文
- charset = "Shift_JIS"
- Text1.Font.Name = "MS UI Gothic"
- Text1.Font.charset = 128
- ElseIf g_Str.NumKorean > 0 Then '韓語
- charset = "ks_c_5601-1987"
- Text1.Font.Name = "GulimChe"
- Text1.Font.charset = 129
- ElseIf g_Str.NumCentralEuro > 0 Then '中歐語言
- charset = "windows-1250"
- Text1.Font.Name = "Arial"
- Text1.Font.charset = 238
- ElseIf g_Str.NumArabic > 0 Then '阿拉伯語
- charset = "windows-1256"
- Text1.Font.Name = "Traditional Arabic"
- Text1.Font.charset = 178
- ElseIf g_Str.NumGreek > 0 Then '希臘語
- charset = "windows-1253"
- Text1.Font.Name = "Arial"
- Text1.Font.charset = 161
- ElseIf g_Str.NumThai > 0 Then '泰語
- charset = "windows-874"
- Text1.Font.Name = "Angsana New"
- Text1.Font.charset = 222
- ElseIf g_Str.NumChinese > 0 Then '中文
- charset = "gb2312"
- Text1.Font.Name = "SimSun"
- Text1.Font.charset = 134
- ' 繁體則使用Big5:
- ' Text1.Font.Name = "MingLiu"
- 'charset = "big5"
- 'Text1.Font.charset = 136
- Else '默認值
- charset = "windows-1252"
- Text1.Font.charset = 0
- Text1.Font.Name = "Arial"
- End If
- Dim bytes() As Byte
- Dim g_OSCharset As String
- '獲取操作系統(tǒng)默認語言對應的字符集
- g_OSCharset = GetCharset()
- '先將Unicode資源文本轉(zhuǎn)換成對應的字節(jié)數(shù)組;
- bytes = ConvertStringToBytes(s, charset)
- '將字節(jié)數(shù)組轉(zhuǎn)換成ANSI(即默認字符集)對應的字符串
- vbstr2 = ConvertBytesToString(bytes, g_OSCharset)
- ' 設置字符串到VB6的標準控件中
- Me.Text1.Text = vbstr2
- End Sub
原文標題:用VB6來實現(xiàn)MUI程序的方法
鏈接;http://www.cnblogs.com/beiguren/archive/2010/03/08/1680713.html