using System;
using System.Security.Cryptography;

namespace BatchService.Framework.Utility
{
    public class MD5Helper
    {
        ///   <summary>  
        ///   给一个字符串进行MD5加密  
        ///   </summary>  
        ///   <param   name="strText">待加密字符串</param>  
        ///   <returns>加密后的字符串</returns>  
        public static string MD5Encrypt(string strText)
        {
            if (strText == null)
            {
                return "";
            }
            //MD5 md5 = new MD5CryptoServiceProvider();
            //byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(strText));
            //return System.Text.Encoding.Default.GetString(result);

            //获取加密服务
            System.Security.Cryptography.MD5CryptoServiceProvider md5CSP = new System.Security.Cryptography.MD5CryptoServiceProvider();

            //获取要加密的字段，并转化为Byte[]数组
            byte[] testEncrypt = System.Text.Encoding.Default.GetBytes(strText);            //加密Byte[]数组
            byte[] resultEncrypt = md5CSP.ComputeHash(testEncrypt);            //将加密后的数组转化为字段(普通加密)
            string testResult = System.Text.Encoding.Default.GetString(resultEncrypt);            //作为密码方式加密 
            string Encrypt_PWD = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(testResult, "MD5");

            return Encrypt_PWD;
        }
        public static string MD5Encrypt2(string strText)
        {
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(strText));
            return System.Text.Encoding.Default.GetString(result);
        }
        public static string MD5Encrypt3(string strText)
        {
            MD5 md5 = new MD5CryptoServiceProvider();
            byte[] result = md5.ComputeHash(System.Text.Encoding.Default.GetBytes(strText));
            return BitConverter.ToString(result).Replace("-", "");
        }
    }
}