新的窗口句柄在IE中消失，不能切换到新窗口 [英] New window handles disappearing in IE, can't switch to new window

问题描述

我使用与C＃的最新版本硒（2.37.0）在Internet Explorer 10（采用最新的32位InternetExplorerDriver，2.37.0）登录到网页上，点击打开一个新的按钮。窗口，然后将焦点更改到新窗口

I am using the latest version of Selenium (2.37.0) with C# in Internet Explorer 10 (using the latest 32-bit InternetExplorerDriver, 2.37.0) to log in to a webpage, click on a button that opens a new window, and then changes focus to the new window.

本来我是用Firefox的这个代码，它的工作每次：

Originally I was using this code in Firefox, and it would work every time:

// Get handle for original window
string parentHandle = driver.CurrentWindowHandle;

// Click on button for new window
driver.FindElement(By.Id("buttonForNewWindow")).Click();

// Get list of all window handles
ReadOnlyCollection<string> allWindowHandles = driver.WindowHandles;

// Loop over all handles and switch to new child window
foreach (string handle in allWindowHandles)
{
    if (handle != parentHandle)
    {
        driver.SwitchTo().Window(handle);
    }
}

但是，这并不在Internet Explorer中运行。

But this doesn't work in Internet Explorer.

我已经查明的问题。之前，我打开新的窗口，我用 driver.WindowHandles.Count 来获取窗口句柄数，以及（如预期）它告诉我，只有一个窗口句柄。然后，当我点击按钮的新窗口，它告诉我（再次，如预期），有两个窗口句柄。但在此之前的代码获取到线 driver.SwitchTo（）窗口（句柄）; ，窗口句柄的数量已经下降回落到一个，均匀虽然这两个窗口仍然可见

I have pinpointed the problem. Before I open the new window, I use driver.WindowHandles.Count to get the number of window handles, and (as expected) it tells me that there is only one window handle. Then, when I click the button for the new window, it tells me (again, as expected) that there are two window handles. But before the code gets to the line for driver.SwitchTo().Window(handle);, the number of window handles has dropped back down to one, even though both windows are still visible.

所以窗口莫名其妙手柄之一是迷路。我已确认（使用大量 Console.WriteLine 语句），即是被丢弃的窗口句柄是新的。我还使用了秒表类花费的时间为新的窗口句柄被丢弃多久：

So somehow one of the window handles is getting lost. I have confirmed (using a bunch of Console.WriteLine statements) that the window handle that is dropped is the new one. I also used the Stopwatch class to time how long it takes for the new window handle to be dropped:

Stopwatch sw = new Stopwatch();

// Wait until the number of windows has changed from 1 to 2
WebDriverWait wait = new WebDriverWait(driver, TimeSpan.FromSeconds(10));
wait.Until((_driver) => { return _driver.WindowHandles.Count != windowsBefore; });

// Start stopwatch
sw.Start();

int numberOfWindows = driver.WindowHandles.Count;

while (numberOfWindows == 2)
{
    numberOfWindows = driver.WindowHandles.Count;
}

sw.Stop();

Console.Write("\nTime elapsed: " + sw.ElapsedMilliseconds + " ms");

这跑了几次后，我发现该窗口的句柄数通常降回一个< STRONG>在不到50毫秒。然而，一个时间窗口句柄持续更长的时间;这里是原来的数字：

After running this a few times, I found that the number of window handles typically drops back to one in less than 50 milliseconds. However, one time the window handle lasted much longer; here are the original numbers:

Time elapsed: 47 ms
Time elapsed: 31 ms
Time elapsed: 47 ms
Time elapsed: 2861 ms
Time elapsed: 30 ms

我还证实，无法在Firefox 会出现此问题。当我运行在Firefox相同的代码，我发现窗口的句柄数从1变为2的和保持这样的，因为它应该。

I have also confirmed that this problem does not occur in Firefox. When I run the same code in Firefox, I find that the number of window handles changes from 1 to 2, and stays that way, as it should.

似乎其他人有这个问题为好。 此人发现，当他们打开一个新窗口等待1000毫秒，getWindowHandles（）返回1，而不是2的值，的这个人在硒谷歌集团似乎有同样的问题。

It seems that others are having this problem as well. This person finds that when they open a new window and wait 1000 milliseconds, getWindowHandles() returns a value of 1 instead of 2. And this person on the Selenium Google Group seems to be having the same issue.

我的问题是：鉴于办理一个新打开的窗口中保持打开（典型值）小于50毫秒，什么是硒切换到新的窗口，在Internet Explorer 10的最有效可行的方法？或者是有什么我应该做的不同，以防止新的窗口迷路处理？

My question: Given that the handle for a newly-opened window remains open for (typically) less than 50 milliseconds, what is the most efficient possible way to switch to a new window in Internet Explorer 10 with Selenium? Or is there something I should be doing differently to prevent new window handles from getting lost?

推荐答案

只是想给一个更新，如果任何人有这个同样的问题，发现这个网页。我还没有找到一个解决我的问题，但我想出了一个解决方法。

Just wanted to give an update, in case anyone else has this same problem and finds this page. I haven't found a solution to my problem, but I came up with a workaround.

本来我是点击该打开了一个新窗口中的链接，我遇到了麻烦硒导航到新窗口。我所做的却是通过页面的源代码挖掘，发现我点击按钮，并找出其中的按钮点。这本来是最简单的，如果它是一个简单的超链接（www.whatever.com / ......），而是它是一个JavaScript函数。这JavaScript函数建立了使用一些固定的字符和某些变量的超级链接;例如：

Originally, I was clicking on a link that opened a new window, and I was having trouble navigating Selenium to the new window. What I did instead was dig through the page's source code, find the button that I was clicking on, and figure out where that button points to. It would have been easiest if it was a simple hyperlink (www.whatever.com/....), but instead it was a Javascript function. That Javascript function builds up the hyperlink using some fixed characters and some variables; for example:

link(username, date) = "http://www.google.com/user=" + username + "?date=" + date;

所以，用这个例子一起去，我只是想出什么变量中（用户名被喂食，日期等），建立了自己的网址，并直接导航到它。因此，我甚至没有打开并导航到一个新的窗口都没有。

So, going along with this example, I just figured out what variables were being fed in (username, date, etc.), built the URL myself, and navigated to it directly. Thus I didn't even have to open up and navigate to a new window at all.

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