文件MD5计算

/****************************************************************************************
** 作者： Eddie Xu
** 时间： 2017/11/20 17:05:24
** 版本: V1.0.0
** CLR: 4.0.30319.42000
** GUID: 3d0af2b0-6ef4-4c56-8330-8a9506f5b5b5
** 机器名： DESKTOP-ECII567
** 描述：文件处理类
****************************************************************************************/

using Manjinba.Communication.Common.Logging;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Manjinba.Communication.Common.Utils
{
public static class FileMD5HashCodeUtil
{
/// <summary>
/// 根据文件生成内容MD5
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static string GetFileContentMD5HashCode(string fileName)
{
try
{
// 打开文件需要指定到文件
FileStream file = new FileStream(fileName, FileMode.Open);
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] retVal = md5.ComputeHash(file);
file.Close();

//把二进制转化为大写的十六进制
var result = BitConverter.ToString(retVal).Replace("-", "");
return result.ToUpper();
}
catch (Exception ex)
{
LogHelper.GetLog(System.Reflection.MethodBase.GetCurrentMethod().DeclaringType.FullName).Error("GetFileContentMD5HashCode() fail,error:" + ex.Message);
throw new Exception("GetFileContentMD5HashCode() fail,error:" + ex.Message + ex.StackTrace);
}
}

/// <summary>
/// 根据文件流生成MD5
/// </summary>
/// <param name="stream"></param>
/// <returns></returns>
public static string GetFileContentMD5HashCode(Stream stream)
{
try
{
stream.Position = 0;
// 打开文件需要指定到文件
System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
byte[] retVal = md5.ComputeHash(stream);