2007-07-07 12:35:15 Kenny

讓你的VB程式支援多國語言的切換

以前做過一個vb的小項目,用戶需要軟體同時能夠支援中文和英文,為此寫了一個自動語言切換的模組來用,不敢獨享,拿來給大家參考一下。

  模組 MdlLanMgr.bas :

Attribute VB_Name = "ModuleLanMgr"
Option Explicit

 Private Declare Function GetPrivateProfileString& Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Long, ByVal lpFileName As String)

Private LanguageFileName As String

'選擇語言

Public Sub SelectLanguage(LanName As String)
 On Error Resume Next
  
 Select Case LanName '根據用戶選擇的語言的名稱,分別讀取不同的語言文件
  Case "English":
   LanguageFileName = AddSplash(App.Path) & "English.Lan"
  Case "Chinese(Simplify)":
   LanguageFileName = AddSplash(App.Path) & "ChineseS.Lan"
  Case "Chinese(Traditional)":
   LanguageFileName = AddSplash(App.Path) & "ChineseT.Lan"
  Case Else:
   LanguageFileName = ""
 End Select
End Sub

'翻譯文字

Public Function TranslateStr(sSection As String, sKey As String, sDefVal As String) As String
 Dim sValue As String * 128
 Dim N As Long
  
 On Error Resume Next
  
 TranslateStr = sDefVal
 If Not FileExists(LanguageFileName) Then
  Exit Function
 End If
 N = GetPrivateProfileString(sSection, sKey, sDefVal, sValue, 127, LanguageFileName)
 If N > 0 Then
  TranslateStr = Left(sValue, N)
 End If
End Function

'自動轉換Form上的一些基本控件(也可自行擴展,目前支援CommandButton,Label,OptionButton,CheckButton)

Public Sub TranslateForm(Frm As Form)
 Dim I As Long
  
 On Error Resume Next
  
 Frm.Caption = TranslateStr(Frm.Name, "Caption", Frm.Caption)
 For I = 0 To Frm.Controls.Count - 1
  If (TypeOf Frm.Controls(I) Is CommandButton) Or (TypeOf Frm.Controls(I) Is Label) _
  Or (TypeOf Frm.Controls(I) Is OptionButton) Or (TypeOf Frm.Controls(I) Is CheckBox) Then
   Frm.Controls(I).Caption = TranslateStr(Frm.Name, Frm.Controls(I).Name, Frm.Controls(I).Caption)
  End If
 Next I
End Sub

  調用很簡單,在作為程式主窗口的Form中這麼寫:

Private Sub Form_Load()
 On Error GoTo ErrFun
 Language = "English"
 If FileExists(AddSplash(App.Path) & "Sys.Ini") Then '從程式的配置文件中讀取上次設定的語言檔案名稱稱
  Open AddSplash(App.Path) & "Sys.Ini" For Input As #1
  Input #1, Language
  Close #1
 End If
 SelectLanguage (Language) '設定全局變量,指定使用的語言
 TranslateForm Me '自動轉換介面文字
  
ErrFun:
 Resume Next
End Sub

  其它Form中都用類似的寫法,在FormLoad中調用TranslateForm(Me)的方法將Form上的Button,Label等切換語言文字。

  最後,用到的語言文件的格式像這樣:

  [FormMain]
  Caption=PCTV Player
  LabelCmd1=Start Play
  LabelCmd2=Edit Play List
  LabelCmd3=Options...
  LabelCmd4=Help
  LabelCmd5=Exit
  LabelCmd6=Exit && Shut down computer

  [FormEdit]
  Caption=Edit PlayList...
  Cmd1=Add Program
  Cmd2=Edit Program
  Cmd3=Del Program
  Cmd4=Move Up
  Cmd5=Move Down
  Cmd6=Quit Edit
  ListView.Title1=ID
  ListView.Title2=Time
  ListView.Title3=Type
  ListView.Title4=Title

  由於VB語言(這裡指VB6.0及以前版本,VB.NET屬於另一種概念了)還是挺弱的,所以也只能將就這做到這個程度了,如果要增加一些其它控件或者其它屬性的自動文字轉換支援,那麼你必須自行擴展TranslateForm()函數。(不像Delphi,可以使用RTTI來搞定一切)

  另外,比較麻煩的是如果在同時有幾個Form顯示著的情況下要切換介面語言,那麼需要手工分別對各個窗口調用TranslateForm()函數,如果你想改進,那麼可以再寫個過程遍歷所有窗口並調用該函數,這個就留給你來做吧。