c# - How to invoke element in a WebBrowser by the class name(s)? -


i'm trying make simple facebook client. 1 of features should allow user post content on homepage/his profile. logs user in (works fine, of elements have got ids on facebook) , inserts data in corresponding field (works fine well), needs click "post" button. however, button doesn't have id. has got class.

<li><button value="1" class="_42ft _4jy0 _11b _4jy3 _4jy1 selected _51sy" data-ft="&#123;&quot;tn&quot;:&quot;+&#123;&quot;&#125;" type="submit">posten</button></li>

('posten' 'post' on german.)

i've been looking around internet few hours , tried different solutions. current solution search item it's inner content ("posten") , invoke it. doesn't work. inserts text doesn't invoke button. here's code:

private void webbrowser1_documentcompleted(object sender, webbrowserdocumentcompletedeventargs e)         {             if (posthomepage)             {                 webbrowser1.document.getelementbyid("u_0_z").setattribute("value", metrotextbox1.text);                 getbuttonbyinnertext("posten").invokemember("click");                 posthomepage = false;             }         }  htmlelement getbuttonbyinnertext(string searchstring)         {              string data = webbrowser1.documenttext;             //is string contained in website             int indexoftext = data.indexof(searchstring);             if (indexoftext < 0)             {                 return null;             }             data = data.remove(indexoftext); //remove text after found text                                              //these strings list of website elements                                              //note: these need updated elements list such as:                                              //      http://www.w3.org/tr/rec-html40/index/elements.html             string[] strings = { "<button" };             //split string these elements.             //subtract 2 because -1 index -1 elements being 1 bigger wanted             int index = (data.split(strings, stringsplitoptions.none).length - 2);             htmlelement item = webbrowser1.document.all[index];             //if element div (which contains search string             //we need next item.             if (item.outerhtml.trim().tolower().startswith("<li"))                 item = webbrowser1.document.all[index + 1];             //txtdebug.text = index.tostring();              return item;          }

(this quick solution edited use, not clean). what's wrong here?

it not getbuttonbyinnertext() method searching button element correctly.

here simple replacement try:

htmlelement getbuttonbyinnertext(string searchstring) {  foreach (htmlelement el in webbrowser1.document.all)     if (el.innertext==searchstring)     return el; }

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