不开启Revit查看revit文件版本

代码

public static class RevitFileUtils
{
    /// <summary>
    /// 获取revit文件版本号[采用流方式]返回结果（eg:2018,2019）,支持2016-2021
    /// </summary>
    /// <param name="filePath"></param>
    /// <returns>返回结果（eg:2018,2019）</returns>
    public static string GetVersion(string filePath)
    {
        const string MatchVersion = @"((?<=Autodesk Revit )20\d{2})|((?<=Format: )20\d{2})";
        var version = string.Empty;
        Encoding useEncoding = Encoding.Unicode;
        using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
        {
            //匹配字符有20个(最长的匹配字符串18版本的有20个)，为了防止分割对匹配造成的影响，需要验证20次偏移结果
            for (int i = 0; i < 20; i++)
            {
                byte[] buffer = new byte[2000];
                file.Seek(i, SeekOrigin.Begin);
                while (file.Read(buffer, 0, buffer.Length) != 0)
                {
                    var head = useEncoding.GetString(buffer);
                    Regex regex = new Regex(MatchVersion);
                    var match = regex.Match(head);
                    if (match.Success)
                    {
                        version = match.ToString();
                        return version;
                    }
                }
            }
        }
        return version;
    }

    /// <summary>
    /// 获取Revit文件的版本,支持2016-2018
    /// </summary>
    /// <param name="path">文件路径</param>
    /// <returns></returns>
    public static string GetRevitVision(string path)
    {
        string revitVision = null;
        FileStream stream = new FileStream(path, FileMode.Open);
        int size = 1024 * 1024;
        byte[] bytes = new byte[size];
        while (stream.Read(bytes, 0, size) > 0)
        {
            string str = Encoding.Unicode.GetString(bytes);

            string pattern = @"Autodesk Revit \d{4}";
            var match = Regex.Match(str, pattern);
            if (match.Success)
            {
                revitVision = match.Value.Substring(match.Length - 4, 4);
                break;
            }
        }
        return revitVision;
    }
}