How to Decode and Encode MIME data

This function will decode the mime data contained in a string into a BYTE and then it can be saved onto your desktop using the FileStream.

Dim byteData As Byte()
byteData = FromBase64(strMimeData)
Dim oFileStream As System.IO.FileStream
oFileStream = New System.IO.FileStream(“c:\temp\” & Me.txtAttachFileName.Text, System.IO.FileMode.Create)
oFileStream.Write(byteData, 0, byteData.Length)

This function will encode the data contained in a BYTE into MIME data which will be returned as a string

Public Function EncodeToBase64(ByVal data() As Byte) As String
If data Is Nothing Then Throw New ArgumentNullException(“data”)
Return Convert.ToBase64String(data)
End Function

This function will decode the MIME data contained in a string  and the binary data will be returned as a BYTE

Public Function  DecodeFromBase64(ByVal base64 As String) As Byte()
If base64 Is Nothing Then Throw New ArgumentNullException(“base64″)
Return Convert.FromBase64String(base64)
End Function