Selenium cannot click menu-item from bootstrap dropdown - selenium

Question

Actions action = new Actions(driver);
WebElement we = driver.findElement(By.xpath("//*[#id='ctl00_Sitemap1_HyperLink1']"));
action.moveToElement(we).build().perform();
WebElement tmpElement= driver.findElement(By.xpath("//*[#id='ctl00_Sitemap1_HyperLink1']"));
JavascriptExecutor js = (JavascriptExecutor) driver;
js.executeScript("arguments[0].click();", tmpElement);
List<WebElement> dd_list = driver.findElementsByXPath("//*[#id='masterNavigation']/ul/li[1]/ul/li");
for (WebElement ele : dd_list)
{
System.out.println("Values " + ele.getAttribute("innerHTML"));
if (ele.getAttribute("innerHTML").contains("Event Dashboard")) {
ele.click();
break;
}
}
}
Hi I am trying to Automate bootstrap drop-down menu. It's visibility is hidden by default.Once you hover mouse on it, its visibility property shows visible.I am able to click on drop-down , but after clicking on drop-down my selenium script is not selecting value from drop-down.
Error: Exception in thread "main"
org.openqa.selenium.ElementNotVisibleException: Cannot click on
element
HTML Code Snippet
<a class="ui-button-text-icons" id="ctl00_Sitemap1_HyperLink1" href="javascript:void(void);">
<span style="padding-right: 1.3em;">Dashboards</span>
<span class="ui-button-icon-secondary ui-icon ui-icon-triangle-1-s"></span>
</a>
<ul style="visibility: hidden;">
<li class="first featureGranted">
Classic Dashboard
</li>
</ul>

Answer 1

Few things
You don't need to traverse though all li elements to find your desire element you can do it with Xpath
I have no Idea why you are using JavaScript to click first Element, but unless click method provided by Selenium is not working I would suggest not to use JavaScript Click
Error suggests that element is not visible, it could be due to multiple reasons. You could wait using Explicit wait until element is visible as mentioned below. it might resolve your issue
Code
Actions action = new Actions(driver);
WebElement we = driver.findElement(By.xpath("//*[#id='ctl00_Sitemap1_HyperLink1']"));
action.moveToElement(we).build().perform();
WebElement tmpElement= driver.findElement(By.xpath("//*[#id='ctl00_Sitemap1_HyperLink1']"));
JavascriptExecutor js = (JavascriptExecutor) driver;
// I have no idea why you are clicking using JavaScript
js.executeScript("arguments[0].click();", tmpElement);
WebDriverWait wait = new WebDriverWait(driver, 30);
WebElement eventDashboardMenu = wait.until(ExpectedConditions.visibilityOfElementLocated(By.xpath("//li[contains(text(),'Event Dashboard')]")));
eventDashboardMenu.click();