C# .NET MD5 HASH

using System;
using System.Security.Cryptography;
using System.Text;
 
namespace AAA
{
    /// <summary>
    /// MD5Util 的摘要说明。
    /// </summary>
    public class MD5Util
    {
        public MD5Util()
        {
            //
            // TODO: 在此处添加构造函数逻辑
            //
        }
 
        /** 获取大写的MD5签名结果 */
        public static string GetMD5(string encypStr, string charset)
        {
            string retStr;
            MD5CryptoServiceProvider m5 = new MD5CryptoServiceProvider();
 
            //创建md5对象
            byte[] inputBye;
            byte[] outputBye;
 
            //使用GB2312编码方式把字符串转化为字节数组．
            try
            {
                inputBye = Encoding.GetEncoding(charset).GetBytes(encypStr);
            }
            catch (Exception ex)
            {
                inputBye = Encoding.GetEncoding("GB2312").GetBytes(encypStr);
            }
            outputBye = m5.ComputeHash(inputBye);
 
            retStr = System.BitConverter.ToString(outputBye);
            retStr = retStr.Replace("-", "").ToUpper();
            return retStr;
        }
    }
}

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