动态添加文件夹

Question

我想在给数据表添加一条记录(lbid,lbname)的时候，自动在网站根目录下添加一个文件夹，文件夹的名字就以lbname为名，求教。

Answer 1

System.IO.Directory.CreateDirectory("~/" + lbname);

Answer 2

                            if(Directory.Exists(System.Web.HttpContext.Current.Server.MapPath(urlstr)) == false)
                            {
                                try
                                {
Directory.CreateDirectory(System.Web.HttpContext.Current.Server.MapPath(urlstr));
                                }
                                catch { HttpContext.Current.Response.Write("必须使用根目录 或 权限不够"); }
                            }