vb.netutf-8的简单介绍

vb.net 如何将编码GB2312转成UTF8

Imports System.Text

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Public Function StringAsUtf8Bytes(ByVal strData As String) As Byte()

Dim bytes() As Byte

bytes = Encoding.UTF8.GetBytes(strData)

Return bytes

End Function

说明：strData参数是GB2312字符串，函数返回UTF8字节数组

VB UTF-8 问题

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

Private Declare Function MultiByteToWideChar Lib "kernel32" (ByVal CodePage As Long, ByVal dwFlags As Long, ByVal lpMultiByteStr As Long, ByVal cchMultiByte As Long, ByVal lpWideCharStr As Long, ByVal cchWideChar As Long) As Long

Private Const CP_UTF8 = 65001

Function Utf8ToUnicode(ByRef Utf() As Byte) As String

Dim lRet As Long

Dim lLength As Long

Dim lBufferSize As Long

lLength = UBound(Utf) - LBound(Utf) + 1

If lLength = 0 Then Exit Function

lBufferSize = lLength * 2

Utf8ToUnicode = String$(lBufferSize, Chr(0))

lRet = MultiByteToWideChar(CP_UTF8, 0, VarPtr(Utf(0)), lLength, StrPtr(Utf8ToUnicode), lBufferSize)

If lRet 0 Then

Utf8ToUnicode = Left(Utf8ToUnicode, lRet)

End If

End Function

Private Sub Form_Load()

Dim a As String

Dim b() As Byte

Dim i As Integer

a = "E9 A2 91 E9 81 93 31 00"

ReDim b(UBound(Split(a, " ")) - 1) As Byte

For i = 0 To UBound(Split(a, " ")) - 1

b(i) = "H" Split(a, " ")(i)

Next i

Text1.Text = Utf8ToUnicode(b())

End Sub

gb2312>unicode>utf8， 以及逆转的方法'>VB.net 字符转换问题 字符（汉字、数字、字母、符号）>gb2312>unicode>utf8， 以及逆转的方法

字符编码转换吗?

1.字符与gb2312(gbk的子集)：

Public Function GBKEncode(ByVal sInput As String) As String

Dim ret_GBKEncode As String = ""

Dim i As Integer

Dim startIndex As Integer = 0

Dim endIndex As Integer

Dim x() As Byte = System.Text.Encoding.Default.GetBytes(sInput) '字符以及字符串在vb2008中都是以unicode编码存储的

endIndex = x.Length - 1

For i = startIndex To endIndex

ret_GBKEncode = "%" Hex(x(i))

Next

Return ret_GBKEncode

End Function

'GBK解码

Public Function GBKDecode(ByVal sInput As String) As String

sInput = sInput.Replace("%", "")

Dim ret_GBKDecode As String = ""

Dim sLen As Integer = sInput.Length

Dim n As Integer = sLen \ 2

Dim sBytes(0 To n - 1) As Byte

'转化为字节码

For i As Integer = 1 To n

sBytes(i - 1) = CByte("H" sInput.Substring(2 * i - 2, 2))

Next

'将字节码转化为字符串

ret_GBKDecode = System.Text.Encoding.Default.GetString(sBytes)

Return ret_GBKDecode

End Function

2.Unicode字符串为UTF-8

Imports System.Text

Public Function StringAsUtf8Bytes(ByVal strData As String) As Byte()

Dim bytes() As Byte

bytes = Encoding.UTF8.GetBytes(strData)

Return bytes

End Function

'这里可以类推出好几种。

求教vb.net utf-8 解码

Public Function GBKDecode(ByVal sInput As String) As String

sInput = sInput.Replace("%", "")

sInput = sInput.Replace(":", "")

Dim ret_GBKDecode As String = ""

Dim sLen As Integer = sInput.Length

Dim n As Integer = sLen \ 2

Dim sBytes(0 To n - 1) As Byte

'转化为字节码

For i As Integer = 1 To n

sBytes(i - 1) = CByte("H" sInput.Substring(2 * i - 2, 2))

Next

'将字节码转化为字符串

ret_GBKDecode = System.Text.Encoding.UTF8.GetString(sBytes)

Return ret_GBKDecode

End Function

'上面是函数，调用方法

MsgBox(GBKDecode(":%E9%80%81%E8%BE%BE%E6%97%A5%E6%9C%9F%20%E9%80%81%E8%BE%BE%E6%97%B6%E9%97%B4"))

vb UTF-8汉字转十六进制的问题?

vb内使用unicode,在转换字符串只需要把字符串赋值给字节数组就可以了.但vb6函数不能指定编码形式.不是unicode编码,就是ASCII编码,使用StrConv函数带VbStrConv.Narrow参数返回的字符串转到字节后就是ASCII编码的.要使用其他编码的使用API.VB.net可以使用system.text.encoding.UTF-8.GetBytes()方法获取十六进制编码

vb.net 将中文转UTF8的代码？谁有的帮帮我吧！

根本都不是你说的简单的UTF8编码问题，人家是加密计算，下面的是UTF8编码转化函数

Private Function convert_UTF8(ByVal str As String) As String

Dim byt() As Byte = System.Text.Encoding.GetEncoding("Gb2312").GetBytes(str)

Return System.Text.Encoding.UTF8.GetString(byt)

End Function

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