c# 磁盘空间计算 和 目录空间 、 文件大小 计算

namespace CommonLibrary.SystemUtils
{
    /// <summary>
    /// 表示存储空间大小计量单位
    /// </summary>
    public enum SizeUnitMode
    {
        /// <summary>
        /// 字节
        /// </summary>
        Byte,
        /// <summary>
        /// 千字节
        /// </summary>
        KiloByte,
        /// <summary>
        /// 兆字节
        /// </summary>
        MegaByte,
        /// <summary>
        /// 亿字节
        /// </summary>
        GigaByte,


    }//end enum SizeUnitMode
}//end namespace CommonLibrary.SystemUtils

#region 磁盘空间计算
        ///<summary> 
        ///获取指定驱动器上存储空间的总大小(以字节为单位) 
        /// <example>示例1：获取C盘上存储空间的总大小
        /// Int64 totalSize=CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c");
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetTotalSize() 
        ///      {
        ///         Int64 totalSize = CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c");
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="driveName">表示驱动器标识的字母，如C、D、E、F等。注意：它可以是从“a”到“z”的大写或小写字母。Null 值无效。</param> 
        ///<returns>以字节为单位的驱动器上存储空间的总大小</returns> 
        public static System.Int64 GetTotalSize(string driveName)
        {
            System.Int64 totalSize = 0;
           
            totalSize = System.Convert.ToInt64(GetTotalSize(driveName, SizeUnitMode.Byte));
           
            return totalSize;
        }//end method

        ///<summary> 
        ///获取指定驱动器上存储空间的总大小
        /// <example>示例1：获取C盘上存储空间的总大小,小数形式更加精确
        /// double totalSizesizeMB = CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        /// double totalSizesizeGB = CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        /// double totalSizesizeB = CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c", CommonLibrary.SystemUtils.SizeUnitMode.Byte);      
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetTotalSize() 
        ///      {
        ///           double totalSizesizeMB = CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        ///           double totalSizesizeGB = CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        ///           double totalSizesizeB = CommonLibrary.SystemUtils.DiskUtil.GetTotalSize("c", CommonLibrary.SystemUtils.SizeUnitMode.Byte); 
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="driveName">表示驱动器标识的字母，如C、D、E、F等。注意：它可以是从“a”到“z”的大写或小写字母。Null 值无效。</param> 
        ///<param name="sizeUnitMode">计算空间时使用的单位</param> 
        ///<returns>以指定单位表示的驱动器上存储空间的总大小</returns> 
        public static System.Double GetTotalSize(string driveName,SizeUnitMode sizeUnitMode)
        {
            System.Double totalSize = 0;
            driveName = driveName + ":" + System.IO.Path.DirectorySeparatorChar;
            System.IO.DriveInfo[] drives = System.IO.DriveInfo.GetDrives();
            foreach (System.IO.DriveInfo drive in drives)
            {
                if (drive.Name.ToLower() == driveName.ToLower())
                {
                    totalSize = drive.TotalSize;
                }
            }

            switch (sizeUnitMode)
            {
                case SizeUnitMode.MegaByte:
                    totalSize = totalSize / (1024 * 1024 );
                    break;
                case SizeUnitMode.GigaByte:
                    totalSize = totalSize / (1024 * 1024 * 1024);

                    break;
                default :
                    break;

            }//end switch
            return totalSize;
        }//end method

       

        ///<summary> 
        ///获取指定驱动器上剩余空间的总大小(以字节为单位) 
        /// <example>示例1：获取C盘上剩余空间的总大小
        /// Int64 freeSize = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c");
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetFreeSpaceSize() 
        ///      {
        ///         Int64 freeSize = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c");
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="driveName">表示驱动器标识的字母，如C、D、E、F等</param> 
        ///<returns>以字节为单位的驱动器上剩余空间的总大小</returns> 
        public static long GetFreeSpaceSize(string driveName)
        {
            System.Int64  freeSpace=0;
 

            freeSpace = System.Convert.ToInt64(GetFreeSpaceSize(driveName, SizeUnitMode.Byte));
          
            return freeSpace;
        }//end method


        ///<summary> 
        /// 获取指定驱动器上剩余空间的总大小
        /// <example>示例1：获取C盘上剩余空间的总大小,小数形式更加精确
        /// double freeSizeMB = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        /// double freeSizeGB = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        /// double freeSizeB = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c", CommonLibrary.SystemUtils.SizeUnitMode.Byte);
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetFreeSpaceSize() 
        ///      {
        ///           double freeSizeMB = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        ///           double freeSizeGB = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        ///           double freeSizeB = CommonLibrary.SystemUtils.DiskUtil.GetFreeSpaceSize("c", CommonLibrary.SystemUtils.SizeUnitMode.Byte);
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="driveName">表示驱动器标识的字母，如C、D、E、F等。注意：它可以是从“a”到“z”的大写或小写字母。Null 值无效。</param> 
        ///<param name="sizeUnitMode">计算空间时使用的单位</param> 
        ///<returns>以指定单位表示的驱动器上剩余空间的总大小</returns> 
        public static System.Double GetFreeSpaceSize(string driveName, SizeUnitMode sizeUnitMode)
        {
            System.Int64 freeSpace = 0;
            driveName = driveName + ":" + System.IO.Path.DirectorySeparatorChar;
            System.IO.DriveInfo[] drives = System.IO.DriveInfo.GetDrives();
            foreach (System.IO.DriveInfo drive in drives)
            {
                if (drive.Name.ToLower() == driveName.ToLower())
                {
                    freeSpace = drive.TotalFreeSpace;
                }
            }

            //单位换算
            switch (sizeUnitMode)
            {
                case SizeUnitMode.MegaByte:
                    freeSpace = freeSpace / (1024 * 1024);
                    break;
                case SizeUnitMode.GigaByte:
                    freeSpace = freeSpace / (1024 * 1024 * 1024);

                    break;
                default:
                    break;

            }//end switch
            return freeSpace;
        }//end method

        #endregion 磁盘空间计算

#region 目录空间计算
        /// <summary>
        /// 获取指定目录占用的存储空间的总大小(以字节为单位) 
        /// <example>示例1：获取 C:\Resource 目录占用的存储空间的总大小
        /// Int64 directorySize = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource");
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetDirectorySize() 
        ///      {
        ///           Int64 directorySize = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource");
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        /// </summary>
        /// <param name="directoryPath">表示目录的标识，如 C:\myDirectory 等</param>
        /// <returns>以字节为单位的目录占用的存储空间的总大小</returns>
        public static System.Int64 GetDirectorySize(string directoryPath)
        {
            System.Int64 size = 0;
            
            size = System.Convert.ToInt64(GetDirectorySize(directoryPath, SizeUnitMode.Byte));
           
            return size;
        }//end method 

        ///<summary> 
        ///获取指定目录占用的存储空间的总大小,小数形式更加精确
        /// <example>示例1：获取 C:\Resource 目录占用的存储空间的总大小
        /// double directorySizeMB = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        /// double directorySizeGB = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        /// double directorySizeBB = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource", CommonLibrary.SystemUtils.SizeUnitMode.Byte);
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetDirectorySize() 
        ///      {
        ///          double directorySizeMB = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        ///          double directorySizeGB = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        ///          double directorySizeBB = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySize(@"C:\Resource", CommonLibrary.SystemUtils.SizeUnitMode.Byte);
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="directoryPath">表示目录的标识，如 C:\myDirectory 等</param>
        ///<param name="sizeUnitMode">计算空间时使用的单位</param> 
        ///<returns>以指定单位表示的目录占用的存储空间的总大小</returns> 
        public static System.Double GetDirectorySize(string directoryPath, SizeUnitMode sizeUnitMode)
        {
            System.Double size = 0;
            size = GetDirectorySizeDouble(directoryPath);

            //单位换算
            switch (sizeUnitMode)
            {
                case SizeUnitMode.MegaByte:
                    size = size / (1024 * 1024);
                    break;
                case SizeUnitMode.GigaByte:
                    size = size / (1024 * 1024 * 1024);

                    break;
                default:
                    break;

            }//end switch
            return size;
        }//end method

        ///<summary> 
        ///获取指定目录占用的存储空间的总大小(以字节为单位)
        /// <example>示例1：获取 C:\Resource 目录占用的存储空间的总大小
        /// Int64 directorySize = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySizeDouble(@"C:\Resource");
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetDirectorySizeDouble() 
        ///      {
        ///           Int64 directorySize = CommonLibrary.SystemUtils.DiskUtil.GetDirectorySizeDouble(@"C:\Resource");
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="directoryPath">表示目录的标识，如 C:\myDirectory 等</param>
        ///<returns>目录占用的存储空间的总大小</returns> 
        private static System.Double GetDirectorySizeDouble(string directoryPath)
        {
            System.Double size = 0;
            System.IO.DirectoryInfo directoryInfo = new System.IO.DirectoryInfo(directoryPath);

            //计算当前目录中所有文件的总大小
            System.IO.FileInfo[] fileInfoList = directoryInfo.GetFiles();
            foreach (System.IO.FileInfo f in fileInfoList)
            {
                size += f.Length;
            }


            //计算子目录大小
            System.IO.DirectoryInfo[] directoryInfoList = directoryInfo.GetDirectories();
            foreach (System.IO.DirectoryInfo d in directoryInfoList)
            {
                size += GetDirectorySizeDouble(d.FullName);
            }


            return size;
        }//end method
        #endregion 目录空间计算

#region 文件空间计算
        //<summary> 
        ///获取指定文件占用的存储空间的总大小,返回值小数精确且带单位
        /// <example>示例1：获取 C:\Resource\file1.txt 文件占用的存储空间的总大小
        /// String fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt");
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetFileSize() 
        ///      {
        ///          
        ///          String fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt");
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="fileFullPath">表示文件的标识，如 C:\Resource\file1.txt 等</param>
        ///<returns>以特定单位表示的文件占用的存储空间的总大小</returns> 
        public static System.String GetFileSizeString(string fileFullPath)
        {
            System.Double size = 0;
            CommonLibrary.SystemUtils.SizeUnitMode sizeUnitMode;
            size = GetFileSize(fileFullPath, out sizeUnitMode);
            string result = string.Empty;
            //单位换算
            switch (sizeUnitMode)
            {
                case SizeUnitMode.Byte:
                    result = System.String.Format("{0} B", size.ToString("N", System.Globalization.CultureInfo.InvariantCulture));

                    break;
                case SizeUnitMode.KiloByte:
                    result = System.String.Format("{0} KB", size.ToString("N", System.Globalization.CultureInfo.InvariantCulture));
                    break;
                case SizeUnitMode.MegaByte:
                    result = System.String.Format("{0} MB", size.ToString("N", System.Globalization.CultureInfo.InvariantCulture));
                    break;
                case SizeUnitMode.GigaByte:
                    result = System.String.Format("{0} G", size.ToString("N", System.Globalization.CultureInfo.InvariantCulture));

                    break;
                default:
                    break;

            }//end switch

            return result;

        }//end method

       

        ///<summary> 
        ///获取指定文件占用的存储空间的总大小,返回计算单位,小数精确
        /// <example>示例1：获取 C:\Resource\file1.txt 文件占用的存储空间的总大小
        /// CommonLibrary.SystemUtils.SizeUnitMode unitMode=CommonLibrary.SystemUtils.SizeUnitMode.MegaByte;
        /// double fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt", out unitMode);
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetFileSize() 
        ///      {
        ///          CommonLibrary.SystemUtils.SizeUnitMode unitMode=CommonLibrary.SystemUtils.SizeUnitMode.MegaByte;
        ///          double fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt", out unitMode);
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="fileFullPath">表示文件的标识，如 C:\Resource\file1.txt 等</param>
        ///<param name="sizeUnitMode">计算空间时使用的单位</param> 
        ///<returns>以指定单位表示的文件占用的存储空间的总大小</returns> 
        public static System.Double GetFileSize(string fileFullPath, out SizeUnitMode sizeUnitMode)
        {
            System.Double size = 0;
            size = GetFileSizeDouble(fileFullPath);
            if (size >= 0 && size < 1024)
            {
                sizeUnitMode = SizeUnitMode.Byte;
                return size;

            }

            System.Double kb = size / 1024;
            if (kb >= 1 && kb < 1024)
            {
                sizeUnitMode = SizeUnitMode.KiloByte;
                return kb;
            }


            System.Double mb = size / (1024 * 1024);
            if (mb >= 1 && mb < 1024)
            {
                sizeUnitMode = SizeUnitMode.MegaByte;
                return mb;
            }

            System.Double gb = size / (1024 * 1024 * 1024);
            if (gb >= 1)
            {
                sizeUnitMode = SizeUnitMode.GigaByte;
                return gb;
            }

            sizeUnitMode = SizeUnitMode.Byte;
            return size;
        }//end method


        /// <summary>
        /// 获取指定文件占用的存储空间的总大小(以字节为单位) 
        /// <example>示例1：获取 C:\Resource\file1.txt 占用的存储空间的总大小
        /// Int64 fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt");
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetFileSize() 
        ///      {
        ///           Int64 fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt");
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        /// </summary>
        /// <param name="fileFullPath">表示文件的标识，如 C:\Resource\file1.txt 等</param>
        /// <returns>以字节为单位的文件占用的存储空间的总大小</returns>
        public static System.Int64 GetFileSize(string fileFullPath)
        {
            System.Int64 size = 0;

            size = System.Convert.ToInt64(GetFileSize(fileFullPath, SizeUnitMode.Byte));
           
            return size;
        }//end method 

        ///<summary> 
        ///获取指定文件占用的存储空间的总大小,小数形式更加精确
        /// <example>示例1：获取 C:\Resource\file1.txt 文件占用的存储空间的总大小
        /// double fileSizeMB = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        /// double fileSizeGB = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        /// double fileSizeBB = CommonLibrary.SystemUtils.FileUtil.GetFileSize(@"C:\Resource\file1.txt", CommonLibrary.SystemUtils.SizeUnitMode.Byte);
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetFileSize() 
        ///      {
        ///          double fileSizeMB = CommonLibrary.SystemUtils.FileUtil.GetFileSize((@"C:\Resource\file1.txt", CommonLibrary.SystemUtils.SizeUnitMode.MegaByte);
        ///          double fileSizeGB = CommonLibrary.SystemUtils.FileUtil.GetFileSize((@"C:\Resource\file1.txt", CommonLibrary.SystemUtils.SizeUnitMode.GigaByte);
        ///          double fileSizeBB = CommonLibrary.SystemUtils.FileUtil.GetFileSize((@"C:\Resource\file1.txt", CommonLibrary.SystemUtils.SizeUnitMode.Byte);
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="fileFullPath">表示文件的标识，如 C:\Resource\file1.txt 等</param>
        ///<param name="sizeUnitMode">计算空间时使用的单位</param> 
        ///<returns>以指定单位表示的文件占用的存储空间的总大小</returns> 
        public static System.Double GetFileSize(string fileFullPath, SizeUnitMode sizeUnitMode)
        {
            System.Double size = 0;
            size = GetFileSizeDouble(fileFullPath);

            //单位换算
            switch (sizeUnitMode)
            {
                case SizeUnitMode.MegaByte:
                    size = size / (1024 * 1024);
                    break;
                case SizeUnitMode.GigaByte:
                    size = size / (1024 * 1024 * 1024);

                    break;
                default:
                    break;

            }//end switch
            return size;
        }//end method

        ///<summary> 
        ///获取指定文件占用的存储空间的总大小(以字节为单位)
        /// <example>示例1：获取 C:\Resource\file1.txt 文件占用的存储空间的总大小
        /// Int64 fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSizeDouble(@"C:\Resource\file1.txt");
        /// <code>
        /// <![CDATA[
        ///   class MyClass 
        ///   {
        ///      //模拟
        ///      public void TestGetFileSizeDouble() 
        ///      {
        ///           Int64 fileSize = CommonLibrary.SystemUtils.FileUtil.GetFileSizeDouble(@"C:\Resource\file1.txt");
        ///       
        ///       }//end method
        ///   }//end class
        ///   ]]>
        /// </code>
        /// </example>
        ///</summary> 
        ///<param name="directoryPath">表示文件的标识，如 C:\Resource\file1.txt 等</param>
        ///<returns>文件占用的存储空间的总大小</returns> 
        private static System.Double GetFileSizeDouble(string fileFullPath)
        {
            System.Double size = 0;
            System.IO.FileInfo fileInfo = new System.IO.FileInfo(fileFullPath);

            //计算当前目录中所有文件的总大小
            size = fileInfo.Length;
           
            return size;
        }//end method
        #endregion 文件空间计算