.net - Logging into a website via C#, navigating to another web page, and then output the source code as a string -

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i relatively new working web pages in c#. trying log particular website ( https://www15.swalife.com/portalweb/portal/cwalogon.jsp ) , allowing page redirected default page, , navigating there (https://www15.swalife.com/csswa/ea/plt/accesselitt.do) , downloading source code , output string.

i have figured out how download source code via httpwebrequest , httpwebresponse having trouble on coding logging in function. assume have post? have looked @ http://www.dreamincode.net/forums/topic/152297-c%23-log-in-to-website-programmatically/ also.

thanks in advance!!

edit:

the code supplied jimmyjambles works flawlessly, except doesn't quite me source code of page wanted. code suggests log-in process failed, believe little bit of tweaking work...also having issues with:

servicepointmanager.servercertificatevalidationcallback = new remotecertificatevalidationcallback(acceptallcertifications);

try changing "public string" , "public bool" functions "public static string" , "public static bool" respectively :)

edit 2:

response html:

"<!doctype html public \"-//w3c//dtd html 4.01 transitional//en\">\n<html>\n<head>\n\n\n\n\n\n\n<meta http-equiv=\"content-type\" content=\"text/html; charset=iso-8859-1\">\n<meta name=\"generator\" content=\"ibm websphere studio\">\n<title>endsession.jsp</title>\n<link rel=\"stylesheet\" href=\"eipportletstyles/swalife.css\" type=\"text/css\">\n\t<script type=\"text/javascript\" language=\"javascript\" \n\t\tsrc=\"eipcommonjavascript/eipgeneralfunctions.js\"/> </script>\n\t\t\n<script type=\"text/javascript\">\n\n\tfunction refreshparent()\n\t{\n\t    if(window.parent)\n\t    {\n\t    if(window.parent.name == 'appmainframe')\n\t       window.parent.location = \"/csswa/ea/plt/logout.do\";\n\t    //  alert('your session has expired.  please login again. ');\n\t    }\n\t}\n\n</script>\n</head>\n<body onload=\"refreshparent();\">\n \n\t \t<div class=\"eiperrors\">\n  \t\t\t<div class=\"legendlabel\">message</div>\n  \t\t\t\n  \t\t\t    <div class=\"errorsheader formtitle\">you have exited out of crew web access.<br>  \t\t\t \n  \t\t\t    </div>\n  \t\t\t \n  \t\t\t<div class=\"errorsheader formtitle\"> please close window , <font  size=\"+1\">log out of swalife</font> complete log out process.  </div>\n  \t\t<div class=\"errorstext\">\n  \t\t  &nbsp;\n  \t\t\t\t\n  \t\t</div>\n  \t\t\n  \t\t\t\n  \t\t\n  \t\t<div class=\"errorsfooter\">you need log in before continuing.</div>  \t\n  \t\t\n \t</div>\n  \n</body>\n</html>\n"

in order use httpwebrequest access secondary url after login need keep in mind few things.

firstly casperah has mentioned need inspect login form , identify "name" attribute of controls used receive login data.

once have done need format post string accordingly , provide webrequest.

the last consideration once have logged in, need store , maintain cookie assigned server keeps logged in.

i have taken webrequest snippet this msdn article , modified perform second page request after login.

        string loginurl = "http://www.gmail.com";         string secondurl = "http://mail.google.com/prefs";          string username = "bob@gmail.com";         string password = "12345";         getsecondaryloginpage(loginurl, secondurl, username, password);        public string getsecondaryloginpage(string loginurl, string secondurl, string username, string password, string cookiename = null)     {         // create request using url can receive post.          httpwebrequest request = (httpwebrequest)webrequest.create(loginurl);         // set method property of request post.         request.method = "post";          cookiecontainer container = new cookiecontainer();          if (cookiename != null)             container.add(new cookie(cookiename, username, "/", new uri(loginurl).host));          request.cookiecontainer = container;          // create post data , convert byte array.  modify line accordingly         string postdata = string.format("username={0}&password={1}", username, password);          servicepointmanager.servercertificatevalidationcallback = new system.net.security.remotecertificatevalidationcallback(acceptallcertifications);          byte[] bytearray = encoding.utf8.getbytes(postdata);         // set contenttype property of webrequest.         request.contenttype = "application/x-www-form-urlencoded";         // set contentlength property of webrequest.         request.contentlength = bytearray.length;         // request stream.         stream datastream = request.getrequeststream();         // write data request stream.         datastream.write(bytearray, 0, bytearray.length);         // close stream object.         datastream.close();         // response.         webresponse response = request.getresponse();         // stream containing content returned server.         datastream = response.getresponsestream();         // open stream using streamreader easy access.         streamreader reader = new streamreader(datastream);         // read content.         string responsefromserver = reader.readtoend();          using (streamwriter outfile =         new streamwriter("output.html"))         {             outfile.write(responsefromserver.tostring());         }          // clean streams.         reader.close();         datastream.close();         response.close();          request = (httpwebrequest)webrequest.create(secondurl);         request.cookiecontainer = container;          response = request.getresponse();         // stream containing content returned server.         datastream = response.getresponsestream();         // open stream using streamreader easy access.         reader = new streamreader(datastream);         // read content.         responsefromserver = reader.readtoend();          // clean streams.         reader.close();         datastream.close();         response.close();          return responsefromserver;     }       public bool acceptallcertifications(object sender, system.security.cryptography.x509certificates.x509certificate certification, system.security.cryptography.x509certificates.x509chain chain, system.net.security.sslpolicyerrors sslpolicyerrors)     {         return true;     }

the added lines postdata , cookies.

you need modify line

string postdata = string.format("username={0}&password={1}", username, password);

based on controls on form, since posted site trying work can guess looking for

string postdata = string.format("uid={0}&portalbase=cwa&password={1}", username, password);

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