c# - Selenium - DOM not refreshing after javascript has loaded element -

i looking following element:

<input id="login_input" value="" class="input_long " type="text" name="login" tabindex="1">

this element being loaded javascript after initial page loaded. code obtaining element:

iwebdriver _drv = new chromedriver(); _drv.navigate().gotourl("http://mysite.com"); system.threading.thread.sleep(2000); {     try     {         _drv.findelement(by.id("login_input")).sendkeys("555567756756");     }     catch (exception e)     {         console.writeline(e.message);     } } while (true); 

the error gives me saying a first chance exception of type 'openqa.selenium.nosuchelementexception' occurred in webdriver.dll, when element visible on site.

what can obtain element?

update: changed code little bit:

iwebdriver _drv = new chromedriver(); _drv.url = "http://mysite.com"; //_drv.navigate().gotourl("http://mysite.com"); {     try     {         waituntilpresent(by.id("login_input")).sendkeys("555567756756");     }     catch (exception e)     {         console.writeline(e.message);     } } while (true);  iwebelement waituntilpresent(by element) {     return new webdriverwait(_drv, timespan.fromseconds(10)).until(expectedconditions.elementexists(element)); } 

the above gives me timeout exception, because _drv.pagesource not being updated after javascript on page has loaded element.

try using explicit wait. -
http://docs.seleniumhq.org/docs/04_webdriver_advanced.jsp#explicit-waits

you getting error because findelement() errors out if not present. it's there, code might executing before it's visible.

your code like

iwebdriver _drv = new chromedriver(); _drv.get("http://mysite.com"); // don't use navigate().gotourl(). // don't use waits.. webdriver has what's called "implicit waits" prevent having use sleep().  why don't see `selenium.waitforpagetoload()` anymore. webelement field = waituntilpresent(_drv.findelement(by.id("login_input"))); field.sendkeys("555567756756");   ... webelement waituntilpresent(webelement element) {     return new webdriverwait(_drv, 10)) // might have casting here     .until(expectedconditions.presenceofelementlocated(element)); }