Question

c#对一个字符串的解码

c#对字符串“%u9ad8%u8003%u6570%u5b66%u7efc%u5408%u9898%u89e3%u9898%u601d%u8def%u4e0e%u65b9%u6cd5120%u4f8b”解码函数
最好也给一个编码的函数，谢谢！

Answer 1

这是UTF-8编码，原文为：高考数学综合题解题思路与方法120例

// UTF-8 转换 GB2312
private static string UTF8ToGB2312 ( string str ) {
            try {
                Encoding utf8 = Encoding.UTF8;
                Encoding gb2312 = Encoding.GetEncoding ( "gb2312" );
                byte[] temp = utf8.GetBytes ( str );
                byte[] temp1 = Encoding.Convert ( utf8, gb2312, temp );
                string result = gb2312.GetString ( temp1 );
                return result;
            } catch {
                return null;
            }
        }

 

// GB2312 转换 UTF-8
private string GB2312ToUTF8(string str)
{
    try
    {
        Encoding utf8 = Encoding.UTF8;
        Encoding gb2312 = Encoding.GetEncoding("GB2312");
        byte[] unicodeBytes = gb2312.GetBytes(str);
        byte[] asciiBytes = Encoding.Convert(gb2312, utf8, unicodeBytes);
        char[] asciiChars = new char[utf8.GetCharCount(asciiBytes, 0, asciiBytes.Length)];
        utf8.GetChars(asciiBytes, 0, asciiBytes.Length, asciiChars, 0);
        string result = new string(asciiChars);
        return result;
    }
    catch
    {
        return "";
    }
}