可用于对比文件是否相同
代码语言：javascript复制 1 /// <summary>
2 /// 获取文件MD5值
3 /// </summary>
4 /// <param name="fileName">文件绝对路径</param>
5 /// <returns>MD5值</returns>
6 public static string GetMD5HashFromFile(string fileName)
7 {
8 try
9 {
10 FileStream file = new FileStream(fileName, FileMode.Open);
11 System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
12 byte[] retVal = md5.ComputeHash(file);
13 file.Close();
14
15 StringBuilder sb = new StringBuilder();
16 for (int i = 0; i < retVal.Length; i )
17 {
18 sb.Append(retVal[i].ToString("x2"));
19 }
20 return sb.ToString();
21 }
22 catch (Exception ex)
23 {
24 throw new Exception("GetMD5HashFromFile() fail,error:" ex.Message);
25 }
26 }
