asp.net 获取指定文件夹下所有子目录及文件(树形)

#region 获取指定文件夹下所有子目录及文件(树形)
        /****************************************
         * 函数名称：getfoldall(string path)
         * 功能说明：获取指定文件夹下所有子目录及文件(树形)
         * 参    数：path:详细路径
         * 调用示列：
         *           string strdirlist = server.mappath("templates");       
         *           this.literal1.text = ec.fileobj.getfoldall(strdirlist);  
        *****************************************/
        /// <summary>
        /// 获取指定文件夹下所有子目录及文件
        /// </summary>
        /// <param name="path">详细路径</param>
        public static string getfoldall(string path)
        {

            string str = "";
            directoryinfo thisone = new directoryinfo(path);
            str = listtreeshow(thisone, 0, str);
            return str;

        }

        /// <summary>
        /// 获取指定文件夹下所有子目录及文件函数
        /// </summary>
        /// <param name="thedir">指定目录</param>
        /// <param name="nlevel">默认起始值,调用时,一般为0</param>
        /// <param name="rn">用于迭加的传入值,一般为空</param>
        /// <returns></returns>
        public static string listtreeshow(directoryinfo thedir, int nlevel, string rn)//递归目录 文件
        {
            directoryinfo[] subdirectories = thedir.getdirectories();//获得目录
            foreach (directoryinfo dirinfo in subdirectories)
            {

                if (nlevel == 0)
                {
                    rn += "├";
                }
                else
                {
                    string _s = "";
                    for (int i = 1; i <= nlevel; i++)
                    {
                        _s += "│ ";
                    }
                    rn += _s + "├";
                }
                rn += "<b>" + dirinfo.name.tostring() + "</b><br />";
                fileinfo[] fileinfo = dirinfo.getfiles();   //目录下的文件
                foreach (fileinfo finfo in fileinfo)
                {
                    if (nlevel == 0)
                    {
                        rn += "│ ├";
                    }
                    else
                    {
                        string _f = "";
                        for (int i = 1; i <= nlevel; i++)
                        {
                            _f += "│ ";
                        }
                        rn += _f + "│ ├";
                    }
                    rn += finfo.name.tostring() + " <br />";
                }
                rn = listtreeshow(dirinfo, nlevel + 1, rn);


            }
            return rn;
        }

 

        /****************************************
         * 函数名称：getfoldall(string path)
         * 功能说明：获取指定文件夹下所有子目录及文件(下拉框形)
         * 参    数：path:详细路径
         * 调用示列：
         *            string strdirlist = server.mappath("templates");      
         *            this.literal2.text = ec.fileobj.getfoldall(strdirlist,"tpl","");
        *****************************************/
        /// <summary>
        /// 获取指定文件夹下所有子目录及文件(下拉框形)
        /// </summary>
        /// <param name="path">详细路径</param>
        ///<param name="dropname">下拉列表名称</param>
        ///<param name="tplpath">默认选择模板名称</param>
        public static string getfoldall(string path,string dropname,string tplpath)
        {
            string strdrop = "<select name=\"" + dropname + "\" id=\"" + dropname + "\"><option value=\"\">--请选择详细模板--</option>";
            string str = "";
            directoryinfo thisone = new directoryinfo(path);
            str = listtreeshow(thisone, 0, str,tplpath);
            return strdrop+str+"</select>";

        }

        /// <summary>
        /// 获取指定文件夹下所有子目录及文件函数
        /// </summary>
        /// <param name="thedir">指定目录</param>
        /// <param name="nlevel">默认起始值,调用时,一般为0</param>
        /// <param name="rn">用于迭加的传入值,一般为空</param>
        /// <param name="tplpath">默认选择模板名称</param>
        /// <returns></returns>
        public static string listtreeshow(directoryinfo thedir, int nlevel, string rn,string tplpath)//递归目录 文件
        {
            directoryinfo[] subdirectories = thedir.getdirectories();//获得目录

            foreach (directoryinfo dirinfo in subdirectories)
            {

                rn += "<option value=\"" + dirinfo.name.tostring() + "\"";
                if (tplpath.tolower() == dirinfo.name.tostring().tolower())
                {
                    rn += " selected ";
                }
                rn += ">";

                if (nlevel == 0)
                {
                    rn += "┣";
                }
                else
                {
                    string _s = "";
                    for (int i = 1; i <= nlevel; i++)
                    {
                        _s += "│ ";
                    }
                    rn += _s + "┣";
                }
                rn += "" + dirinfo.name.tostring() + "</option>";


                fileinfo[] fileinfo = dirinfo.getfiles();   //目录下的文件
                foreach (fileinfo finfo in fileinfo)
                {
                    rn += "<option value=\"" + dirinfo.name.tostring()+"/"+finfo.name.tostring() + "\"";
                    if (tplpath.tolower() == finfo.name.tostring().tolower())
                    {
                        rn += " selected ";
                    }
                    rn += ">";

                    if (nlevel == 0)
                    {
                        rn += "│ ├";
                    }
                    else
                    {
                        string _f = "";
                        for (int i = 1; i <= nlevel; i++)
                        {
                            _f += "│ ";
                        }
                        rn += _f + "│ ├";
                    }
                    rn += finfo.name.tostring() + "</option>";
                }
                rn = listtreeshow(dirinfo, nlevel + 1, rn, tplpath);


            }
            return rn;
        }
        #endregion