Base64 Encode/Decode a String

VB.NET example to base-64 encode and decode a string.

Download Chilkat .NET for 2.0 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

Dim crypt As New Chilkat.Crypt2()

'  Any string argument automatically begins the 30-day trial.
Dim success As Boolean
success = crypt.UnlockComponent("30-day trial")
If (success <> true) Then
    MsgBox("Crypt component unlock failed")
    Exit Sub
End If


Dim s As String
s = "A friend called me up the other day and talked about investing in a dot-com that sells lobsters. Internet lobsters. Where will this end? --Donald Trump"

crypt.CryptAlgorithm = "none"
crypt.EncodingMode = "base64"

'  Other possible EncodingMode settings are:
'  "quoted-printable", "hex", and "url"

Dim qp As String
qp = crypt.EncryptStringENC(s)

TextBox1.Text = TextBox1.Text & qp & vbCrLf
TextBox1.Refresh()

Dim decoded As String
decoded = crypt.DecryptStringENC(qp)

TextBox1.Text = TextBox1.Text & decoded & vbCrLf
TextBox1.Refresh()