删除文件夹下所有文件

  /// <summary>
        /// 删除文件夹下文件
        /// </summary>
        /// <param name="paths"></param>
        public void DeleteFolder(string paths)
        {
            foreach (string d in Directory.GetFileSystemEntries(paths))
            {
                if (File.Exists(d))
                {
                    FileInfo fi = new FileInfo(d);
                    if (fi.Attributes.ToString().IndexOf("ReadOnly") != -1)
                        fi.Attributes = FileAttributes.Normal;
                    File.Delete(d);//直接删除其中的文件  
                }
                else
                {
                    DirectoryInfo d1 = new DirectoryInfo(d);
                    if (d1.GetFiles().Length != 0)
                    {
                        DeleteFolder(d1.FullName);////递归删除子文件夹
                    }
                    Directory.Delete(d);
                }
            }
        }


        /// <summary>
        /// 删除文件夹及其内容
        /// </summary>
        /// <param name="dir"></param>
        public void DeleteFolder1(string dir)
        {
            foreach (string d in Directory.GetFileSystemEntries(dir))
            {
                if (File.Exists(d))
                {
                    FileInfo fi = new FileInfo(d);
                    if (fi.Attributes.ToString().IndexOf("ReadOnly") != -1)
                        fi.Attributes = FileAttributes.Normal;
                    File.Delete(d);//直接删除其中的文件  
                }
                else
                    DeleteFolder(d);////递归删除子文件夹
                Directory.Delete(d);
            }
        }

    /// <summary>
        /// 逐级 逐级创建文件夹并判断是否存在
        /// </summary>
        /// <param name="url"></param>
        /// <returns></returns>
        private string CreateDir(string url)
        {
            string[] paths = url.Split('/');
            string path = "";
            for (int i = 0; i < paths.Length; i++)
            {
                path = Path.Combine(path, paths[i]);
                if (!Directory.Exists(path))
                {
                    Directory.CreateDirectory(path);
                }
            }
            return path;
        }