public partial class FileGet

     {

         /// <summary>

         /// 私有变量

         /// </summary>

         private static List<FileInfo> lst = new List<FileInfo>();

         /// <summary>

         /// 获得目录下所有文件或指定文件类型文件(包含所有子文件夹)

         /// </summary>

         /// <param name="path">文件夹路径</param>

         /// <param name="extName">扩展名可以多个 例如 .mp3.wma.rm</param>

         /// <returns>List<FileInfo></returns>

         public static List<FileInfo> getFile(string path, string extName)

         {

             getdir(path, extName);

             return lst;

         }

         /// <summary>

         /// 私有方法,递归获取指定类型文件,包含子文件夹

         /// </summary>

         /// <param name="path"></param>

         /// <param name="extName"></param>

         private static void getdir(string path, string extName)

         {

             try

             {

                 string[] dir = Directory.GetDirectories(path); //文件夹列表

                 DirectoryInfo fdir = new DirectoryInfo(path);

                 FileInfo[] file = fdir.GetFiles();

                 //FileInfo[] file = Directory.GetFiles(path); //文件列表

                 if (file.Length !=  || dir.Length != ) //当前目录文件或文件夹不为空

                 {

                     foreach (FileInfo f in file) //显示当前目录所有文件

                     {

                         if (extName.ToLower().IndexOf(f.Extension.ToLower()) >= )

                         {

                             lst.Add(f);

                         }

                     }

                     foreach (string d in dir)

                     {

                         getdir(d, extName);//递归

                     }

                 }

             }

             catch (Exception ex)

             {

                 LogHelper.WriteLog(ex);

                 throw ex;

             }

         }

     }

     public partial class FileGet1

     {

         /// <summary>

         /// 获得目录下所有文件或指定文件类型文件(包含所有子文件夹)

         /// </summary>

         /// <param name="path">文件夹路径</param>

         /// <param name="extName">扩展名可以多个 例如 .mp3.wma.rm</param>

         /// <returns>List<FileInfo></returns>

         public static List<FileInfo> getFile(string path, string extName)

         {

             try

             {

                 List<FileInfo> lst = new List<FileInfo>();

                 string[] dir = Directory.GetDirectories(path); //文件夹列表

                 DirectoryInfo fdir = new DirectoryInfo(path);

                 FileInfo[] file = fdir.GetFiles();

                 //FileInfo[] file = Directory.GetFiles(path); //文件列表

                 if (file.Length !=  || dir.Length != ) //当前目录文件或文件夹不为空

                 {

                     foreach (FileInfo f in file) //显示当前目录所有文件

                     {

                         if (extName.ToLower().IndexOf(f.Extension.ToLower()) >= )

                         {

                             lst.Add(f);

                         }

                     }

                     foreach (string d in dir)

                     {

                         getFile(d, extName);//递归

                     }

                 }

                 return lst;

             }

             catch (Exception ex)

             {

                 LogHelper.WriteLog(ex);

                 throw ex;

             }

         }

     }