需要将javascript代码转换为c＃

Question

I have found a javascript library that compresses and decompresses a string. I'm writing a program in C# that creates a javascript. in this script, all images needs to be converted to base64string and then compressed so that when the script is executed the decompress function, decompress then and show the images.

both compress and the compress functions work fine but I need the exact c# version of the compressor so that javascript decompressor can decompress it. here is the library:

     function lzw_encode(s) {
        var dict = {};
        var data = (s + "").split("");
        var out = [];
        var currChar;
        var phrase = data[0];
        var code = 256;
        for (var i = 1; i < data.length; i++) {
            currChar = data[i];
            if (dict[phrase + currChar] != null) {
                phrase += currChar;
            }
            else {
                out.push(phrase.length > 1 ? dict[phrase] : phrase.charCodeAt(0));
                dict[phrase + currChar] = code;
                code++;
                phrase = currChar;
            }
        }
        out.push(phrase.length > 1 ? dict[phrase] : phrase.charCodeAt(0));
        for (var i = 0; i < out.length; i++) {
            out[i] = String.fromCharCode(out[i]);
        }
        return out.join("");
    }

    // Decompress an LZW-encoded string
    function lzw_decode(s) {
        var dict = {};
        var data = (s + "").split("");
        var currChar = data[0];
        var oldPhrase = currChar;
        var out = [currChar];
        var code = 256;
        var phrase;
        for (var i = 1; i < data.length; i++) {
            var currCode = data[i].charCodeAt(0);
            if (currCode < 256) {
                phrase = data[i];
            }
            else {
                phrase = dict[currCode] ? dict[currCode] : (oldPhrase + currChar);
            }
            out.push(phrase);
            currChar = phrase.charAt(0);
            dict[code] = oldPhrase + currChar;
            code++;
            oldPhrase = phrase;
        }
        return out.join("");
    }

can anybody help me with conversion of the lzw_encode function to C#?

Answer 1

There is an open-source library called Sharp-LZW that provides LZW encoding and decoding in C#. You can find it here: https://code.google.com/p/sharp-lzw/