[WebMethod]
    public string GetFileList(string sPath)
    {
        string BaseUriStr = Server.MapPath("./") + sPath;
        string sRest = string.Empty;
        if (Directory.Exists(BaseUriStr) == true)
        {
            List<string> list = new List<string>();

            //获取当前目录下指定文件类型的文件列表
            string[] stringList = Directory.GetFiles(BaseUriStr, "*.*", SearchOption.TopDirectoryOnly);

            foreach (string str in stringList)
            {
                string fileName;
                fileName = System.IO.Path.GetFileName(str);
                list.Add(fileName);
            }
            foreach (string s in list)
            {
                sRest += s + "|";
            }
            sRest = sRest.TrimEnd('|');
            return sRest;
        }
        else
        {
            return null;
        }
    }

------解决方案--------------------
参考:http://wucountry.cnblogs.com/archive/2006/02/15/331248.aspx

------解决方案--------------------
帮顶，学习个

------解决方案--------------------
学习一下