C#中MD5加密

 1 using System.Security.Cryptography;
 2 using System.Text;
 3 
 4 namespace Common
 5 {
 6     public class Md5Helper
 7     {
 8         public string GetMd5(string txt)
 9         {
10             //创建md5对象
11             MD5 md5 = MD5.Create();
12             //将字符串转成字节数组
13             byte[] bs = Encoding.UTF8.GetBytes(txt);
14             //加密
15             byte[] bs2 = md5.ComputeHash(bs);
16             //将字节数组转成字符串
17             StringBuilder sb = new StringBuilder();
18             for (int i = 0; i < bs2.Length; i++)
19             {
20                 sb.Append(bs2[i].ToString("X2")); //x小写X大写
21             }
22             return sb.ToString();
23         }
24     }
25 }