Conris.Utility/MD5Helper.cs

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security.Cryptography;

namespace Conris.Utility
{
    public static class MD5Helper
    {
        private static readonly int BufferSize = 1048576;//1M

        /// <summary>
        /// 实现对一个文件md5的读取，path为文件路径
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static string md5_hash(string path)
        {
            string hash = null;
            try
            {
                //using (var fs = File.OpenRead(path))
                using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, BufferSize))
                {
                    using (var get_file = new BufferedStream(fs, BufferSize))
                    {
                        MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
                        byte[] hash_byte = md5.ComputeHash(get_file);
                        hash = ToHashCode(hash_byte);
                        get_file.Close();
                        md5.Clear();
                        fs.Close();
                    }
                }
            }
            catch (Exception e)
            {
                Log4netHelper.Error(path + " 计算MD5时发生错误", e);
            }
            return hash;
        }

        /// <summary>
        /// 实现对一个文件md5的读取，path为文件路径
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        //public static string GetHash(string path)
        //{
        //    string hash = null;
        //    try
        //    {
        //        using (var fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite, BufferSize))
        //        {
        //            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
        //            byte[] hash_byte = md5.ComputeHash(fs);
        //            hash = ToHashCode(hash_byte);
        //            md5.Clear();