C# 获取文件MD5值的方法
可用于对比文件是否相同
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 }
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