.NET MD5 加密（备忘）

// CODE1  建立MD5加密主函数

using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Security.Cryptography; using System.Text; namespace Ts.BusinessRules {     /// <summary>     /// 公共方法类     /// </summary>     public class Utitly     {         /// <summary>         /// 使用MD5加密字符串         /// </summary>         /// <param name="str">待加密的字符</param>         /// <returns></returns>         public static string GetStrUseMD5(string str)         {             if(str.IsNullOrEmpty())             {                 return string.Empty;             }             MD5CryptoServiceProvider md5=new MD5CryptoServiceProvider();             byte[] arr = UTF8Encoding.Default.GetBytes(str);             byte[] bytes = md5.ComputeHash(arr);             str = BitConverter.ToString(bytes);             str=str.Replace("-", "");             return str;         }     } }

 

// CODE2 建立 string 类型的扩展方法

using System; using System.Collections.Generic; using System.Linq; using System.Web; namespace Ts.BusinessRules {     /// <summary>     /// 扩展方法     /// </summary>     public static class ExtendMethod     {         /// <summary>         /// 判断字符串是否为空或Null         /// </summary>         /// <param name="str">字符串</param>         /// <returns></returns>         /// <remarks>创建人员(日期):★ben★(101029 13:41)</remarks>         public static bool IsNullOrEmpty(this string str)         {             return string.IsNullOrEmpty(str);         }         /// <summary>         /// 得到MD5加密后的字符         /// </summary>         /// <param name="str">待转换字符</param>         /// <returns></returns>         public static string ToMD5(this string str)         {             return Utitly.GetStrUseMD5(str);         }     } }

 

 

// CODE3  字符串加密的使用方法

namespace Ts.BusinessRules {     /// <summary>     /// 公共方法类     /// </summary>     public class Utitly     {

        public string Test(string str)         {              string md5=str.ToMD5();

             return md5;         }

    }

}

转载于:https://www.cnblogs.com/xxj-jing/archive/2010/11/01/2890110.html

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