.net md5加密

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using OAOnline.BLL;
using System.Diagnostics;
using System.Text;
using System.Security.Cryptography;
using System.IO;
//1、加密成32位16进制字符串
    protected string HashMD5_String(string str)
        {
            return FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").ToLower();
        }

//2、同上，增加偏移量

        public string GetMD5(string sDataIn, string move)
        {
            System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
            byte[] byt, bytHash;
            byt = System.Text.Encoding.UTF8.GetBytes(move + sDataIn);
            bytHash = md5.ComputeHash(byt);
            md5.Clear();
            string sTemp = "";
            for (int i = 0; i < bytHash.Length; i++)
            {
               sTemp += bytHash[i].ToString("x").PadLeft(2, '0');
            }
            return sTemp;
        }

//3、将字符串编码成ASCII数组后进行MD5加密，然后再编码成ASCII字符串

using System;

using System.Data;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using OAOnline.BLL;

using System.Diagnostics;

using System.Text;

using System.Security.Cryptography;

using System.IO;

//1、加密成32位16进制字符串

    protected string HashMD5_String(string str)

        {

            return FormsAuthentication.HashPasswordForStoringInConfigFile(str, "MD5").ToLower();

        }



//2、同上，增加偏移量



        public string GetMD5(string sDataIn, string move)

        {

            System.Security.Cryptography.MD5CryptoServiceProvider md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();

            byte[] byt, bytHash;

            byt = System.Text.Encoding.UTF8.GetBytes(move + sDataIn);

            bytHash = md5.ComputeHash(byt);     

            md5.Clear();

            string sTemp = "";

            for (int i = 0; i < bytHash.Length; i++)

            {

               sTemp += bytHash[i].ToString("x").PadLeft(2, '0');        

            }

            return sTemp;

        }



//3、将字符串编码成ASCII数组后进行MD5加密，然后再编码成ASCII字符串

public static string MD5Encrypt(string strEnc)
{
    string str = "加密失败！";
    try
    {

        System.Security.Cryptography.MD5CryptoServiceProvider MD5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
        str = ASCIIEncoding.ASCII.GetString(MD5.ComputeHash(ASCIIEncoding.ASCII.GetBytes(strEnc)));
        return str;
    }
    catch (System.Exception ex)
    {
        throw (ex);
    }
}