vb.net - Encode string to UTF-8

问题

I've made a class to encode a string

Public Class UTF8
    Public Shared Function encode(ByVal str As String)
        Dim utf8Encoding As New System.Text.UTF8Encoding
        Dim encodedString() As Byte

        encodedString = utf8Encoding.GetBytes(str)

        Return encodedString.ToString()
    End Function
End Class

Return encodedString.ToString() always returns "System.Byte[]". How could I get the real UTF-8 String?

回答1:

Use UTF8.GetString(Byte[]) method.

回答2:

We can check if a string is UTF-8 by examining the string BOM value. This is the correct code sample:

Public Shared Function encode(ByVal str As String) As String
    'supply True as the construction parameter to indicate
    'that you wanted the class to emit BOM (Byte Order Mark)
    'NOTE: this BOM value is the indicator of a UTF-8 string
    Dim utf8Encoding As New System.Text.UTF8Encoding(True)
    Dim encodedString() As Byte

    encodedString = utf8Encoding.GetBytes(str)

    Return utf8Encoding.GetString(encodedString)
End Function

来源：https://stackoverflow.com/questions/6035380/vb-net-encode-string-to-utf-8