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因为业务需要将一些字符串转换为指定编码方便后期操作
核心代码
Const adTypeBinary = 1
Const adTypeText = 2
' accept a string and convert it to Bytes array in the selected Charset
Function StringToBytes(Str,Charset)
Dim Stream : Set Stream = CreateObject("ADODB.Stream")
Stream.Type = adTypeText
Stream.Charset = Charset
Stream.Open
Stream.WriteText Str
Stream.Flush
Stream.Position = 0
' rewind stream and read Bytes
Stream.Type = adTypeBinary
StringToBytes= Stream.Read
Stream.Close
Set Stream = Nothing
End Function
' accept Bytes array and convert it to a string using the selected charset
Function BytesToString(Bytes, Charset)
Dim Stream : Set Stream = CreateObject("ADODB.Stream")
Stream.Charset = Charset
Stream.Type = adTypeBinary
Stream.Open
Stream.Write Bytes
Stream.Flush
Stream.Position = 0
' rewind stream and read text
Stream.Type = adTypeText
BytesToString= Stream.ReadText
Stream.Close
Set Stream = Nothing
End Function
' This will alter charset of a string from 1-byte charset(as windows-1252)
' to another 1-byte charset(as windows-1251)
Function AlterCharset(Str, FromCharset, ToCharset)
Dim Bytes
Bytes = StringToBytes(Str, FromCharset)
AlterCharset = BytesToString(Bytes, ToCharset)
End Function
使用例子：
dim s1,s2,FromCharset,ToCharset s1 = "我的字符串之云搜网" FromCharset = "GB2312" ToCharset = "ISO-8859-1" s2 = AlterCharset(s1,FromCharset,ToCharset)
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