中文问题MobileUrlEncode

在做断点续传的时候遇到（cf）不支持中文的问题，主要是没有UrlEncode该方法，后来几经周折解决了，和大家分享，希望对遇到该问题的朋友有所帮助。

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

namespace BreakPointResumeWindowsCeHttp
{
    /// <summary>
    /// EncryptMethod
    /// </summary>
    public class EncryptMethod
    {
        private EncryptMethod()
        {
        }

        /// <summary>
        /// UrlEncode
        /// </summary>
        /// <param name="str">源字符串</param>
        /// <param name="e">Encoding</param>
        /// <returns>编码后的字符串</returns>
        public static string UrlEncode(string str, Encoding e)
        {
            if (str == null)
            {
                return null;
            }
            byte[] buffer = UrlEncodeToBytes(str, e);
            return Encoding.ASCII.GetString(buffer, 0, buffer.Length);
        }

        /// <summary>
        /// UrlEncodeToBytes
        /// </summary>
        /// <param name="str">str</param>
        /// <param name="e">Encoding</param>
        /// <returns>UrlEncodeToBytes</returns>
        public static byte[] UrlEncodeToBytes(string str, Encoding e)
        {
            if (str == null)
            {
                return null;
            }
            byte[] buffer1 = e.GetBytes(str);
            return UrlEncodeBytesToBytesInternal(buffer1, 0, buffer1.Length, false);
        }

        private static byte[] UrlEncodeBytesToBytesInternal(byte[] bytes, int offset, int count, bool alwaysCreateReturnValue)
        {
            int num1 = 0;
            int num2 = 0;
            for (int num3 = 0; num3 < count; num3++)
            {
                char ch1 = (char)bytes[offset + num3];
                if (ch1 == ' ')
                {
                    num1++;
                }
                else if (!IsSafe(ch1))
                {
                    num2++;
                }
            }
            if ((!alwaysCreateReturnValue && (num1 == 0)) && (num2 == 0))
            {
                return bytes;
            }
            byte[] buffer1 = new byte[count + (num2 * 2)];
            int num4 = 0;
            for (int num5 = 0; num5 < count; num5++)
            {
                byte num6 = bytes[offset + num5];
                char ch2 = (char)num6;
                if (IsSafe(ch2))
                {
                    buffer1[num4++] = num6;
                }
                else if (ch2 == ' ')
                {
                    buffer1[num4++] = 0x2b;
                }
                else
                {
                    buffer1[num4++] = 0x25;
                    buffer1[num4++] = (byte)IntToHex((num6 >> 4) & 15);
                    buffer1[num4++] = (byte)IntToHex(num6 & 15);
                }
            }
            return buffer1;
        }

        private static char IntToHex(int n)
        {
            if (n <= 9)
            {
                return (char)((ushort)(n + 0x30));
            }
            return (char)((ushort)((n - 10) + 0x61));
        }

        internal static bool IsSafe(char ch)
        {
            if ((((ch >= 'a') && (ch <= 'z')) || ((ch >= 'A') && (ch <= 'Z'))) || ((ch >= '0') && (ch <= '9')))
            {
                return true;
            }
            switch (ch)
            {
                case '\'':
                case '(':
                case ')':
                case '*':
                case '-':
                case '.':
                case '_':
                case '!':
                    return true;
            }
            return false;
        }

               /// <summary>
        /// Return base64 version of string.
        /// </summary>
        public static string Encrypt(string text)
        {
            try
            {
                byte[] bytes = Encoding.ASCII.GetBytes(text);
                return Convert.ToBase64String(bytes, 0, bytes.Length);
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
                return String.Empty;
            }
        }

        /// <summary>
        /// Return string version of base64 string.
        /// </summary>
        public static string Decrypt(string text)
        {
            try
            {
                byte[] bytes = Convert.FromBase64String(text);
                return Encoding.ASCII.GetString(bytes, 0, bytes.Length);
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
                return String.Empty;
            }
        }
    }
}

包括：
CompressionBytes:利用SharpZipLib压缩和解压缩
HttpUtility：UrlDecode、UrlEncode
Utils：LogError

更新后的：下载