using System;

using System.Net;

using System.IO;

public class Program

{

    public static void Main()

    {

                // This is where the data is going to be posted

        string url = @"http://www.cpso.on.ca/Public-Register/All-Doctors-Search.aspx";

​

        // This is the data that i am going to post

        string postData = "manScript_HiddenField=&" +

            "__EVENTTARGET=p%24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24btnSubmit&" +

            "__EVENTARGUMENT=&__LASTFOCUS=&lng=en-CA&p%24lt%24ctl00%24SearchBox%24txtWord=Site+Search&p%" + 

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24txtLastName=Aalders&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24txtFirstName=&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24grpGender=+&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24ddLanguage=08&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24grpDocType=rdoDocTypeAll&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24grpStatus=rdoStatusActive&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24ddCity=Select --%3E&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24txtPostalCode=&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24ddHospitalCity=Select+--%3E&p%" +

            "24lt%24ctl03%24pageplaceholder%24p%24lt%24ctl03%24AllDoctorsSearch%24ddHospitalName=-1&" +

            "__VIEWSTATE=";

​

        // Create my request

        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);

        req.CookieContainer = new CookieContainer();

        req.Method = "POST";

        req.ContentType = "application/x-www-form-urlencoded";

        req.ContentLength = postData.Length;

        req.Referer = @"http://www.cpso.on.ca/Public-Register/All-Doctors-Search.aspx";

        req.Accept = "text/html, application/xhtml+xml, */*";

        req.UserAgent = "Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko";

​

        // Now its time to write the data that I want to post to the webpage

        using (StreamWriter reqWriter = new StreamWriter(req.GetRequestStream()))

        {

            reqWriter.Write(postData);

        }

​

        // Get the response/results

​

        string respData = string.Empty;

​

        using (StreamReader responseReader = new StreamReader(req.GetResponse().GetResponseStream()))

        {

            // Add response/results to string

            respData = responseReader.ReadToEnd();

        }

        Console.WriteLine(respData.Contains("Aalders"));

    }

}