nuget包

安装System.Text.Encoding.CodePages

使用

//将byte[]转化为gb2312的字符串，要确保byte[]是存储的gb2312的字符串，要不然会乱码
string ToGb213(byte[] str)
{
    //首先需要注册
    Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
    Encoding gb2312;
    gb2312 = Encoding.GetEncoding("GB2312");
    return gb2312.GetString(str);
}

//utf-8编码的字符串转化为gb2312编码的字符串
string LanChange(string str)
{
    Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
    Encoding utf8;
    Encoding gb2312;
    utf8 = Encoding.GetEncoding("UTF-8");
    gb2312 = Encoding.GetEncoding("GB2312");
    byte[] gb = gb2312.GetBytes(str);
    gb = Encoding.Convert(gb2312, utf8, gb);
    return utf8.GetString(gb);
}