验证AD账号、密码

using System.DirectoryServices;

 

 

        //srvr = ldap server, e.g. LDAP://sohu.com
        //usr = user name
        //pwd = user password

        //用法：IsAuthenticated("LDAP://sohu.com", "0140001", "123456"

        public bool IsAuthenticated(string srvr, string usr, string pwd)
        {
            bool authenticated = false;

            try
            {
                DirectoryEntry entry = new DirectoryEntry(srvr, usr, pwd);
                object nativeObject = entry.NativeObject;
                authenticated = true;
            }
            catch (DirectoryServicesCOMException cex)
            {
                //not authenticated; reason why is in cex
            }
            catch (Exception ex)
            {
                //not authenticated due to some other exception [this is optional]
            }
            return authenticated;
        }