multithreading - Multi-threaded C# Selenium WebDriver automation with Uris not known beforehand -

i need perform simultaneous webdrivers manipulation, uncertain how this.

what asking here is:

1. what correct way achieve ?
2. what reason exception getting (revealed below)

after research ended with:

1. way see people doing (and 1 ended using after playing api, before searching) loop on window handles webdriver has @ hand, , perform switch , out of window handle want process, closing when finished.

2. selenium grid not seem option fore me - wrong or intended parallel processing ? since running in single computer, of no use me.

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in trying 1st option, have following scenario (a code sample available below, skipped stuff not relevant/repeat (where ever added 3 dots:

i have html page, several submit buttons, stacked.

clicking each of them open new browser/tab (interestingly enough, using chromedriver opens tabs, while firefoxdriver opens separate windows each.)

as side note: can't determine uris of each submit beforehand (they must determined javascript, , @ point, let's assume want handle knowing nothing client code.

now, after looping on submit buttons, , issuing webelement.click() on corresponding elements, tabs/windows open. code flows create list of tasks executed, 1 each new tab/window.

the problem is: since tasks depend upon same instance of webdriver switch window handles, seems need add resource sharing locks/control. uncertain whether correct, since saw no mention of locks/resource access control in searching multi-threaded web driver examples.

on other hand, if able determine tabs/windows uris beforehand, able skip automation steps needed reach point, , creating webdriver instance each thread, via navigate().gotourl() straightforward. looks deadlock! don't see webdriver's api providing access newly opened tab/window without performing switch. , want switch if not have repeat automation steps lead me current window !

...

in case, keep getting exception:

element belongs different frame current 1 - switch containing frame use it

at

iwebelement element = cell.findelement 

inside todictionary() block.

i checked selectors returning results, in chrome's console.

foreach (webelement resultset in resultsets)     resultset.click();   foreach(string windowhandle in webdriver.windowhandles.skip(1)) {     datacollectiontasks.add(task.factory.startnew<list<datatable>>(obj =>     {         list<datatable> collecteddata = new list<datatable>();         string window = obj string;          if (window != null)         {             webdriver.switchto().window(windowhandle);             list<webelement> datasets = webdriver.findelements(by.jqueryselector(utils.getappsetting("selectors.resultsetdata"))).tolist();              datatable data = null;              (int = 0; < datasets.count; += 2)             {                 data = new datatable();                  data.columns.add("col1", typeof(string));                 data.columns.add("col2", typeof(string));                 data.columns.add("col3", typeof(string));                  ///...                  //data set header                 if (i % 2 != 0)                 {                     iwebelement headerelement = datasets[i].findelement(openqa.selenium.by.cssselector(utils.getappsetting("selectors.resultsetdataheader")));                     data.tablename = string.join(" ", headerelement.text.split().take(3));                 }                 //data set records                 else                 {                     dictionary<string, string> cells = datasets[i]                         .findelements(openqa.selenium.by.cssselector(utils.getappsetting("selectors.resultsetdatacell")))                         .todictionary(                             cell =>                             {                                 iwebelement element = cell.findelement(openqa.selenium.by.cssselector(utils.getappsetting("selectors.resultsetdataheadercolumn")));                                 return element == null ? string.empty : element.text;                             },                             cell =>                             {                                 return cell == null ? string.empty : cell.text;                             });                      string col1value, col2value, col3value; //...                     cells.trygetvalue("col1", out col1value);                     cells.trygetvalue("col2", out col2value);                     cells.trygetvalue("col3", out col3value);                     //...                      data.rows.add(col1value, col2value, col3value /*...*/);                 }             }              collecteddata.add(data);         }          webdriver.switchto().window(mainwindow);         webdriver.close();          return collecteddata;     }, windowhandle)); } //foreach  task.waitall(datacollectiontasks.toarray()); foreach (task<list<datatable>> datacollectiontask in datacollectiontasks) {     results.addrange(datacollectiontask.result); }  return results;