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

namespace MyHash
{
        class md5
    {
        /// <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 string md5_hash(string path)
        {
            try
            {

                FileStream get_file = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
                System.Security.Cryptography.MD5CryptoServiceProvider get_md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                byte[] hash_byte = get_md5.ComputeHash(get_file);
                string resule = System.BitConverter.ToString(hash_byte);
                resule = resule.Replace("-", "");
                return resule;
            }
            catch (Exception e)
            {
               
                return e.ToString();
 
            }
         

          
 
        }
    }
}

 

 

 

 

 

 

===================================================

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

 

 

 public static void getFileMD5(string path)
        {
            FileStream fs = new FileStream(path, FileMode.Open, FileAccess.Read);
            MD5CryptoServiceProvider md5 = new MD5CryptoServiceProvider();
            byte[] md5byte = md5.ComputeHash(fs);
            int i, j;
            foreach (byte b in md5byte)
            {
                i = Convert.ToInt32(b);
                j = i >> 4;
                Console.Write(Convert.ToString(j, 16));
                j = ((i << 4) & 0x00ff) >> 4;
                Console.Write(Convert.ToString(j, 16));
            }
            Console.ReadLine();

        }