using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;

namespace Stone.Common
{
    public class MyStrings
    {
        /// <summary>
        /// 取得MD5加密字串
        /// </summary>
        /// <param name="Message">要加密的字串</param>
        /// <returns></returns>
        public static string GetMD5String(string Message)
        {
            return  Biz.MD5.MDString(Message);
        }

        /// <summary>
        /// 取得MD5文件加密字串
        /// </summary>
        /// <param name="FileName">要加密的文件路径</param>
        /// <returns></returns>
        public static string GetMD5File(string FileName)
        {
            return Biz.MD5.MDFile(FileName);
        }

        /// <summary>
        /// 简单加密一个字串
        /// </summary>
        /// <param name="rs">要加密的字串</param>
        /// <returns></returns>
        public static string DecryptStr(string rs)
        {
            //byte[] by = new byte[rs.Length];
            //for (int i = 0;
            //i <= rs.Length - 1;
            //i++)
            //{
            //    by[i] = (byte)((byte)rs[i] - 1);
            //}
            //rs = "";
            //for (int i = by.Length - 1;
            //i >= 0;
            //i--)
            //{
            //    rs += ((char)by[i]).ToString();
            //}
            //return rs;

            return DEncrypt.Decrypt(rs);
        }

        /// <summary>
        /// 简单解密一个字串
        /// </summary>
        /// <param name="rs">要解密的字串</param>
        /// <returns></returns>
        public static string EncryptStr(string rs) //倒序加1加密 
        {
            //byte[] by = new byte[rs.Length];
            //for (int i = 0;
            //i <= rs.Length - 1;
            //i++)
            //{
            //    by[i] = (byte)((byte)rs[i] + 1);
            //}
            //rs = "";
            //for (int i = by.Length - 1;
            //i >= 0;
            //i--)
            //{
            //    rs += ((char)by[i]).ToString();
            //}
            //return rs;

            return DEncrypt.Encrypt(rs);
        }

        /// <summary>
        /// 在指定字串右边填充指定的字串
        /// </summary>
        /// <param name="o_str">要填充的原字串</param>
        /// <param name="p_str">填充的字符</param>
        /// <param name="len">要填充的长度</param>
        /// <returns></returns>
        public static string PadLeftString(string o_str, char p_str, int len)
        {
            string result;
            if (o_str.Length > len)
            {
                result = o_str.Substring(0, len);
            }
            else
            {
                int slen = len - o_str.Length;
                result = o_str;
                while (slen > 0)
                {
                    result = p_str.ToString() + result;
                    slen--;
                }
            }

            return result;
        }

        public static int GetLength(string str)
        {
            return System.Text.Encoding.Default.GetBytes(str).Length;
        }

        /// <summary>
        /// 取得SQL参数字串（替换直接SQL参数中的单引号）
        /// </summary>
        /// <param name="str">要替换的SQL参数</param>
        /// <returns>替换后的SQL参数</returns>
        public static string GetString(string str)
        {
            string reslut = "";
            reslut = str.Replace("'", "''");
            return reslut;
        }

        /// <summary>
        /// 格式化金额显示
        /// </summary>
        /// <param name="d"></param>
        /// <returns></returns>
        public static string FormatPrice(Decimal d)
        {
            string ret = Math.Round(d, 2) + "";
            return ret;
        }


        /// <summary>
        /// 分割字符串
        /// </summary>
        /// <param name="str"></param>
        /// <param name="pattern"></param>
        /// <returns></returns>
        public static string[] split(string str, string pattern)
        {
            return Regex.Split(str, pattern, RegexOptions.IgnoreCase);
        }
    }
}