VB 建UTF-8的文本文件

发布网友发布时间：2022-10-26 15:24

共2个回答

热心网友时间：2023-09-16 22:34

VB编程下用UTF-8编码编写的文本文件，都会产生一个BOM，这使得转换出来的文件，在系统编译中编译不过去，必须要把BOM去掉，通过代码实现如下：

Dim app As Excel.Application
Dim eworkbook As Workbook
Dim eworksheet As Worksheet
Dim eworksheet_count As Integer
Dim sheetName As String
Dim obj As Object
Dim FileNum
Dim file_path as String
Dim j as Integer
Dim filepath_save as String

    filepath_save = "D:/"
    Set app = New Excel.Application          //连接EXCEL
    Set eworkbook = app.Workbooks.Open(file_path)
    eworkbook_count = eworkbook.Worksheets.count

    For j = 1 To eworkbook_count
      filepath_path = filepath_save & j & ".txt"
      Set eworksheet = eworkbook.Sheets(j)
      sheetName = eworksheet.Name
      Set obj = New ADODB.Stream     //设置ADODB流

      With obj
        .Open
        .Charset = "UTF-8"
        .Position = .Size
        .WriteText "helloworld", 1
        .SaveToFile filepath_save
        .Close
      End With

      Set obj = Nothing

      Open filepath_save For Input As #1    //消除UTF-8的BOM
      Line Input #1, str
           mm = Replace(str, str, "msgid """"")
      Close #1
      Open filepath_save For Binary As #FileNum
           Put #FileNum, , mm
      Close #FileNum
    Next j

    Set eworksheet = Nothing
    eworkbook.Close
    Set eworkbook = Nothing
    app.Quit
    Set app = Nothing

热心网友时间：2023-09-16 22:35

'所用到的API引入
Private Declare Function WideCharToMultiByte Lib "kernel32" ( _
ByVal CodePage As Long, _
ByVal dwFlags As Long, _
ByVal lpWideCharStr As Long, _
ByVal cchWideChar As Long, _
ByRef lpMultiByteStr As Any, _
ByVal cchMultiByte As Long, _
ByVal lpDefaultChar As String, _
ByVal lpUsedDefaultChar As Long) As Long
' 将输入文本写进UTF8格式的文本文件
' 输入
' strInput：文本字符串
' strFile：保存的UTF8格式文件路径
' bBOM：True表示文件带"EFBBBF"头，False表示不带
Sub WriteUTF8File(strInput As String, strFile As String, Optional bBOM As Boolean = True)
Dim CP_UTF8 As String
Dim bByte As Byte
Dim ReturnByte() As Byte
Dim lngBufferSize As Long
Dim lngResult As Long
Dim TLen As Long

' 判断输入字符串是否为空
If Len(strInput) = 0 Then Exit Sub
On Error GoTo errHandle
' 判断文件是否存在，如存在则删除
' If Dir(strFile) <> "" Then Kill strFile

CP_UTF8 = 65001
TLen = Len(strInput)
lngBufferSize = TLen * 3 + 1
ReDim ReturnByte(lngBufferSize - 1)
lngResult = WideCharToMultiByte(CP_UTF8, 0, StrPtr(strInput), TLen, _
ReturnByte(0), lngBufferSize, vbNullString, 0)
If lngResult Then
lngResult = lngResult - 1
ReDim Preserve ReturnByte(lngResult)
Open strFile For Binary As #1
If bBOM = True Then
bByte = 239
Put #1, , bByte
bByte = 187
Put #1, , bByte
bByte = 191
Put #1, , bByte
End If
Put #1, , ReturnByte
Close #1
End If
Exit Sub
errHandle:
MsgBox Err.Description, , "错误 - " & Err.Number
End Sub来自：求助得到的回答