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Base64 encoding easily (Magyar verzió)

The Microsoft .net framework supports the base64 encoding from the bases. The encoding can be done with the System.Convert class. To convert a simple UTF-8 coded text into a Base64 string in C# you can use this:

string result = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(utf8Text));

The ToBase64String method gets a byte array as a parameter and gives the encoded string back. The result can be stored in a simple string, because the base64 string is a readable ASCII string.

Decoding

To decode a UTF-8 text is a slightly more difficult than the encoding.

byte[] toDecodeByte = Convert.FromBase64String(textToTransform);

System.Text.UTF8Encoding encoder = new System.Text.UTF8Encoding();
System.Text.
Decoder utf8Decode = encoder.GetDecoder();

int
charCount = utf8Decode.GetCharCount(toDecodeByte, 0, toDecodeByte.Length);

char
[] decodedChar = new char[charCount];
utf8Decode.GetChars(toDecodeByte, 0, toDecodeByte.Length, decodedChar, 0);
string result =
new String(decodedChar);

The decoding - like before - can be done with calling a method from the Convert class. The only problem with this, that is gives back a byte array as a result. It should be converted to a UTF-8 string with the System.Text namespace's Decoder class.

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