c# - Setting textbox innertext of an externally loaded webpage using AgilityPack -

i trying write code automatically fills in textbox inside of external webpage. write code below inside of buttonclick event , want is, load external webpage , fill existing textbox text. however, couldn't working. doesn't set @ all.

    string url2dehands = "http://www.hereisthewebsite.be";     htmlweb mvweb = new htmlweb();     htmldocument doc = mvweb.load(url2dehands);     htmlnode mvtextbox = doc.documentnode.selectsinglenode("//input[@id='id_ofthe_textbox']");     mvtextbox.innerhtml= "assdsda";  

i think need might http://docs.seleniumhq.org/

selenium automates browsers. that's it. power entirely you. automating web applications testing purposes, not limited that. boring web-based administration tasks can (and should!) automated well.

also, can use selenium ide. write code in set of different languages. can use code automate process.