前言
本篇主要记录:VS2019 WinFrm桌面应用程序实现字符串和文件的Md5转换功能。后续系统用户登录密码保护,可采用MD5加密保存到后台数据库。
准备工作
搭建WinFrm前台界面
如下图
核心代码构造Md5Helper类
代码如下:
![](https://images.cnblogs.com/OutliningIndicators/ContractedBlock.gif)
1 using System; 2 using System.Collections.Generic; 3 using System.IO; 4 using System.Linq; 5 using System.Security.Cryptography; 6 using System.Text; 7 using System.Threading.Tasks; 8 9 namespace MD5Demo 10 { 11 class Md5Helper 12 { 13 /// <summary> 14 /// 获取Md5码 15 /// </summary> 16 /// <param name="value">需要转换成Md5码的原码</param> 17 /// <returns></returns> 18 public static string Md5(string value) 19 { 20 var result = string.Empty; 21 if (string.IsNullOrEmpty(value)) return result; 22 using (var md5 = MD5.Create()) 23 { 24 result = GetMd5Hash(md5, value); 25 } 26 return result; 27 } 28 static string GetMd5Hash(MD5 md5Hash, string input) 29 { 30 31 byte[] data = md5Hash.ComputeHash(Encoding.UTF8.GetBytes(input)); 32 var sBuilder = new StringBuilder(); 33 foreach (byte t in data) 34 { 35 sBuilder.Append(t.ToString("x2")); 36 } 37 return sBuilder.ToString(); 38 } 39 static bool VerifyMd5Hash(MD5 md5Hash, string input, string hash) 40 { 41 var hashOfInput = GetMd5Hash(md5Hash, input); 42 var comparer = StringComparer.OrdinalIgnoreCase; 43 return 0 == comparer.Compare(hashOfInput, hash); 44 } 45 46 /// <summary> 47 /// 获取文件的Md5码 48 /// </summary> 49 /// <param name="fileName">文件所在的路径</param> 50 /// <returns></returns> 51 public static string GetMD5HashFromFile(string fileName) 52 { 53 try 54 { 55 FileStream file = new FileStream(fileName, FileMode.Open); 56 System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider(); 57 byte[] retVal = md5.ComputeHash(file); 58 file.Close(); 59 60 StringBuilder sb = new StringBuilder(); 61 for (int i = 0; i < retVal.Length; i++) 62 { 63 sb.Append(retVal[i].ToString("x2")); 64 } 65 return sb.ToString(); 66 } 67 catch (Exception ex) 68 { 69 throw new Exception("GetMD5HashFromFile() fail,error:" + ex.Message); 70 } 71 } 72 73 } 74 }