Wait for an Ajax call to complete with Selenium 2 WebDriver

Question

If you're using jQuery for your ajax requests, you can wait until the jQuery.active property is zero. Other libraries might have similar options.

public void WaitForAjax()
{
    while (true) // Handle timeout somewhere
    {
        var ajaxIsComplete = (bool)(driver as IJavaScriptExecutor).ExecuteScript("return jQuery.active == 0");
        if (ajaxIsComplete)
            break;
        Thread.Sleep(100);
    }
}

You could also use the Selenium explicit wait here. Then you don't need to handle timeout yourself

public void WaitForAjax()
{
    var wait = new WebDriverWait(driver, TimeSpan.FromSeconds(15));
    wait.Until(d => (bool)(d as IJavaScriptExecutor).ExecuteScript("return jQuery.active == 0"));
}

var wait = new WebDriverWait(d, TimeSpan.FromSeconds(5));
var element = wait.Until(driver => driver.FindElement(By.Id("Hobbies")));

Java solution based on Morten Christiansens answer

    public void WaitForAjax() throws InterruptedException
    {

        while (true)
        {

            Boolean ajaxIsComplete = (Boolean) ((JavascriptExecutor)driver).executeScript("return jQuery.active == 0");
            if (ajaxIsComplete){
                break;
            }
            Thread.sleep(100);
        }
    }

Just a little improvement by adding a timeout parameter:

internal static void WaitForAllAjaxCalls(this ISelenium selenium, IWebDriver driver, int timeout = 40)
    {
        Stopwatch sw = new Stopwatch();
        sw.Start();
        while (true)
        {
            if (sw.Elapsed.Seconds > timeout) throw new Exception("Timeout");
            var ajaxIsComplete = (bool)driver.ExecuteScript("return jQuery.active == 0");
            if (ajaxIsComplete)
                break;
            Thread.Sleep(100);
        }            
    }

Just small improvement:

//Wait for Ajax call to complete
  public void WaitForAjax1() throws InterruptedException
    {

        while (true)
        {
            if ((Boolean) ((JavascriptExecutor)driver).executeScript("return jQuery.active == 0")){
                break;
            }
            Thread.sleep(100);
        }
    }

Here is my code:

public static void WaitForCommission (WebDriver driver) throws Exception {
    for (int second = 0;; second++) {
        if (second >= 30) fail("timeout");
        try { 
            if (IsElementActive(By.id("transferPurposeDDL"), driver)) 
                break; 
            } catch (Exception e) {}
        Thread.sleep(1000);
    }
}

private static boolean IsElementActive(By id, WebDriver driver) {
    WebElement we =  driver.findElement(id);        
    if(we.isEnabled())
        return true;
    return false;
}

This code is really work.