Base64 Encode/Decode a String

C# 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

Chilkat.Crypt2 crypt = new Chilkat.Crypt2();

//  Any string argument automatically begins the 30-day trial.
bool success;
success = crypt.UnlockComponent("30-day trial");
if (success != true) {
    MessageBox.Show("Crypt component unlock failed");
    return;
}

string s;
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"

string qp;
qp = crypt.EncryptStringENC(s);

textBox1.Text += qp + "\r\n";
textBox1.Refresh();

string decoded;
decoded = crypt.DecryptStringENC(qp);

textBox1.Text += decoded + "\r\n";
textBox1.Refresh();