获取文件的MD5码(C#)

11/25/2015来源:ASP.NET技巧人气:3355

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

namespace Test
{
public class md5Code { /// <summary> /// 获取文件的MD5码 /// </summary> /// <param name="fileName">传入的文件名(含路径及后缀名)</param> /// <returns></returns> public string GetMD5HashFromFile(string fileName) { try { FileStream file = new FileStream(fileName, System.IO.FileMode.Open); MD5 md5 = new MD5CryptoServicePRovider(); byte[] retVal = md5.ComputeHash(file); file.Close(); StringBuilder sb = new StringBuilder(); for (int i = 0; i < retVal.Length; i++) { sb.Append(retVal[i].ToString("x2")); } return sb.ToString(); } catch (Exception ex) { throw new Exception("GetMD5HashFromFile() fail,error:" + ex.Message); } } } }