.net实现ping的实例代码

class servicepinger
    {
        private static readonly ilog log = logmanager.getlogger(typeof(servicepinger));
        public servicepinger(string sitename, string siteurl, string serviceurl)
        {
            if (sitename == null)
                throw new argumentexception("sitename can't be null");

            if (siteurl == null)
                throw new argumentexception("siteurl can't be null");

            if (serviceurl == null)
                throw new argumentexception("serviceurl can't be null");

            if (sitename.length == 0)
                throw new argumentexception("sitename can't be empty");

            if (siteurl.length == 0)
                throw new argumentexception("siteurl can't be empty");

            if (serviceurl.length == 0)
                throw new argumentexception("serviceurl can't be empty");

            pingingsitename = sitename;
            pingingsiteurl = siteurl;
            serviceurltoping = serviceurl;

 

        }

        private string pingingsitename = string.empty;
        private string pingingsiteurl = string.empty;
        private string serviceurltoping = string.empty;
        private int timeoutinmilliseconds = 3000;

 
        /// <summary>
        /// does the actual pinging of the service
        /// </summary>
        public void ping()
        {
            try
            {
                httpwebrequest request = (httpwebrequest)webrequest.create(serviceurltoping);
                request.method = "post";
                request.contenttype = "text/xml";
                request.timeout = timeoutinmilliseconds;
                request.credentials = credentialcache.defaultnetworkcredentials;

 
                stream stream = (stream)request.getrequeststream();
                using (xmltextwriter writer = new xmltextwriter(stream, encoding.ascii))
                {
                    writer.writestartdocument();
                    writer.writestartelement("methodcall");
                    writer.writeelementstring("methodname", "weblogupdates.ping");
                    writer.writestartelement("params");
                    writer.writestartelement("param");
                    writer.writeelementstring("value", pingingsitename);
                    writer.writeendelement();
                    writer.writestartelement("param");
                    writer.writeelementstring("value", pingingsiteurl);
                    writer.writeendelement();
                    writer.writeendelement();
                    writer.writeendelement();
                }

 
                request.getresponse();
            }
            catch (invalidoperationexception ex)
            {
                log.error(ex);
            }
            catch (notsupportedexception ex)
            {
                log.error(ex);
            }

        }

    }