Revit.Plugln/FWindSoft/Test/MD5Test/MD5Utils.cs

/*-------------------------------------------------------------------------
 * 功能描述：MD5Utils
 * 作者：xulisong
 * 创建时间： 2019/5/17 9:05:40
 * 版本号：v1.0
 *  -------------------------------------------------------------------------*/

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test.MD5Test
{

    public class MD5Utils
    {
        /// <summary>
        /// 获取一个文件的MD5值
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public static string GetMD5HashFromFile(string fileName)
        {
            try
            {
                if (!File.Exists(fileName))
                    return null;
                FileStream file = new FileStream(fileName, FileMode.Open);
                System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                byte[] retVal = md5.ComputeHash(file);
                file.Close();

                StringBuilder sb = new StringBuilder();
                for (int i = 0; i < retVal.Length; i++)
                {
                    sb.Append(retVal[i].ToString("x2"));
                }
                return sb.ToString();
            }
            catch (Exception ex)
            {
                throw;
            }
            return null;
        }
        /// <summary>
        /// 获取一个文件的MD5值，使用Base64格式编码
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public static string GetMD5HashFromFileByBase64(string fileName)
        {
            try
            {
                if (!File.Exists(fileName))
                    return null;
                FileStream file = new FileStream(fileName, FileMode.Open);
                System.Security.Cryptography.MD5 md5 = new System.Security.Cryptography.MD5CryptoServiceProvider();
                byte[] retVal = md5.ComputeHash(file);
                file.Close();

                var sb = Convert.ToBase64String(retVal);
                return sb.ToString();
            }
            catch (Exception ex)
            {
                throw;
            }
            return null;
        }

        public static string GetVersionRevitFile(string fileName)
        {
            //fileName = @"E:\2019-4-14\测试4.8.rvt";//2018_4.15测试二.rvt";
            fileName = @"E:\2019-4-14\测试4.8.rvt";
            var usePath = @"d:\ccccc.txt";
            FileStream file = new FileStream(fileName, FileMode.Open);
            byte[] buffer = new byte[1024*30];
            var offset = 0;
            var useOffset = 0;
            var encodings = new List<Encoding>() {Encoding.Unicode};//,Encoding.UTF32,Encoding.UTF8,Encoding.ASCII };// Encoding.GetEncodings().Select(c=>c.GetEncoding());}
            Encoding useEncoding = Encoding.Unicode;// Encoding.Unicode;
            //file.Seek(file.Length - 1024 * 70, SeekOrigin.Begin);
            //useOffset = file.Read(buffer, 0, buffer.Length);
            //var vision = useEncoding.GetString(buffer);
            //var dd = vision.Contains("2017");
            file.Read(buffer, 0, buffer.Length);
            var head = useEncoding.GetString(buffer);


            File.WriteAllText(usePath, head);
            Process.Start("notepad.exe", usePath);
            return "";
            #region 注释
            //while ((useOffset = file.Read(buffer, 0, buffer.Length)) > 0)
            //{

            //    foreach (var encodingInfo in encodings)
            //    {
            //        var cc = encodingInfo.GetString(buffer);
            //        if (cc.Contains("2017") || cc.Contains("2018"))
            //        {
            //            useEncoding = encodingInfo;
            //            File.WriteAllText(usePath, cc);
            //            Process.Start("notepad.exe", usePath);
            //            break;
            //        }

            //    }


            //    offset += useOffset;
            //}

            #endregion

            return string.Empty;// vision;

        }
    }
}