数据操作时，设计的各种类型的编码和解码方法

1 转换escape编码，解码Escape

/// <summary>/// 转换escape编码/// </summary>/// <param name="s"></param>/// <returns></returns>private static string Escape(string s){StringBuilder sb = new StringBuilder();byte[] ba = System.Text.Encoding.Unicode.GetBytes(s);for (int i = 0; i < ba.Length; i += 2){    /**/ BE SURE 2'ssb.Append("%u");sb.Append(ba[i + 1].ToString("X2"));sb.Append(ba[i].ToString("X2"));}return sb.ToString();}/// <summary>/// 解码Escape/// </summary>/// <param name="str"></param>/// <returns></returns>public static string UnEscape(string str){if (!string.IsNullOrEmpty(str)){str = str.Remove(0, 2);//删除最前面两个＂%u＂string[] strArr = str.Split(new string[] { "%u" }, StringSplitOptions.None);//以子字符串＂%u＂分隔byte[] byteArr = new byte[strArr.Length * 2];for (int i = 0, j = 0; i < strArr.Length; i++, j += 2){byteArr[j + 1] = Convert.ToByte(strArr[i].Substring(0, 2), 16);  //把十六进制形式的字串符串转换为二进制字节byteArr[j] = Convert.ToByte(strArr[i].Substring(2, 2), 16);}str = System.Text.Encoding.Unicode.GetString(byteArr); //把字节转为unicode编码}return str;}

2 unicode编码，unicode解码

/// <summary>/// unicode编码/// </summary>/// <param name="str"></param>/// <returns></returns>public static string ToUnicodeString(this string str){StringBuilder strResult = new StringBuilder();if (!string.IsNullOrEmpty(str)){for (int i = 0; i < str.Length; i++){strResult.Append("\\u");strResult.Append(((int)str[i]).ToString("x"));}}return strResult.ToString();}/// <summary>/// unicode解码/// </summary>/// <param name="str"></param>/// <returns></returns>public static string FromUnicodeString(this string str){//最直接的方法Regex.Unescape(str);StringBuilder strResult = new StringBuilder();if (!string.IsNullOrEmpty(str)){string[] strlist = str.Replace("\\", "").Split('u');try{for (int i = 1; i < strlist.Length; i++){int charCode = Convert.ToInt32(strlist[i], 16);strResult.Append((char)charCode);}}catch (FormatException ex){return Regex.Unescape(str);}}return strResult.ToString();}

3 Url编码和解码，

string str2 =System.Web.HttpUtility.UrlEncode(str1,Encoding.GetEncoding("GB2312"));//这个是对字符串进行编码//string str2 = System.Web.HttpUtility.UrlDecode(str1, Encoding.GetEncoding("GB2312"));