PPMD Compression: String to Compressed Bytes

Demonstrates how to compress a string to a compressed byte array using PPMD.

The functionality in this example is available in pre-release only:
To use, unzip and add a reference to the enclosed DLL in your .NET project.

Download Chilkat .NET for 2.0 / 3.5 Framework

Download Chilkat .NET for 1.0 / 1.1 Framework

Chilkat.Compression compress = new Chilkat.Compression();

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

compress.Algorithm = "ppmd";

string strData;
int i;

//  Create a long string to compress.
strData = "abcdefg1122334455667788";
strData = strData + "\r\n";
for (i = 0; i <= 99; i++) {
    strData = strData + "abcdefg1122334455667788";
    strData = strData + "\r\n";
}

//  Depending on the programming language, the string
//  may be Unicode.  Tell the component to convert to
//  ansi (1-byte/char) prior to compression:
compress.Charset = "ansi";

//  PPMD compress the string:
byte[] compressedBytes = null;
compressedBytes = compress.CompressString(strData);

//  Decompress back to the original:
string strOriginal;
strOriginal = compress.DecompressString(compressedBytes);

//  Display the uncompressed original:
textBox1.Text += "--- Original ---" + "\r\n";
textBox1.Text += strOriginal + "\r\n";