Need help for webdriver and Javascript for a hidden File upload element

问题

I am trying to automate a file upload scenario in a client web application. The code of the entire file upload form looks like this

<td valign="top">
    <iframe id="batchLoad:inputFile:uploadFrame" class="iceInpFile" width="600px" scrolling="no" height="30px"             frameborder="0" title="Input File Frame" style="border-collapse:collapse; border-spacing:0px; padding:0px;" src="/hip-webapp/block/resource/LTExMzg4MjQzMTY=/" name="batchLoad:inputFile:uploadFrame" marginwidth="0"       marginheight="0" allowtransparency="true">
        <html style="overflow:hidden;">
            <head>
                <body style="background-color:transparent; overflow:hidden">
                    <form id="fileUploadForm" enctype="multipart/form-data" action="/hip-webap/uploadHtml" method="post">
                        <input type="hidden" value="batchLoad:inputFile" name="ice.component">
                        <input type="hidden" value="3" name="ice.view">
                        <input class="iceInpFileTxt" type="file" size="35" name="upload">
                        <input class="iceInpFileBtn" type="submit" value="Upload">
                    </form>
                </body>
        </html>
    </iframe>
    <br>
    <span id="batchLoad:j_id537"></span>
</td>

I tried with the conventional File upload method, but that did not work.

Please refer: Selenium Webdriver FIle Upload error element ice:inputFile

I am not much familiar with Javascript hence I think I am doing some syntax error. What I tried is:

String ew = (String)js.executeScript("document.getElementByXPath('//form[@id='fileUploadForm']/input[3]')");
String j = "arguments[0].style.height='auto'; arguments[0].style.visibility='visible';";
js.executeScript(j, ew);

Got the hint from here Selenium WebDriver clicking on hidden element.

But now I am getting syntax error. I got the XPath using Selenium IDE. I have also tried this, but that did not work either.

((JavascriptExecutor)driver).executeScript("document.getElementByClassName(iceInpFileTxt).style.visibility = 'visible';");
((JavascriptExecutor)driver).executeScript("document.getElementByClassName('iceInpFileTxt').value = 'D:\\AD\\Prac\\Prac\\002 EditPrac Add Person Error.xml-revHEAD.svn000.tmp.xml'");

Please advice.

回答1:

Because there is an <iframe> element on the page you're working with, you need to switch the driver context to that <iframe> element first:

driver.switchTo().frame("batchLoad:inputFile:uploadFrame");

Once you've done that, try the usual upload method again.

driver.findElement(By.name("upload")).sendKeys("D:\\AD\\Prac\\Prac\\002 EditPrac Add Person Error.xml-revHEAD.svn000.tmp.xml");

Note that when you'll try to interact with elements outside the <iframe>, you'll have to do driver.switchTo().defaultContent(); beforehand.

Side notes:

The iframe does not have a closing </head> tag. This is not an issue, but something you might think about since you're most likely developing the web :).
You certainly don't have to make the invisible elements visible nor should you inject the file to the hidden input element manually unless for some Flash/Silverlight controls. You could have simply set the value right away.
String ew = (String)js.executeScript("document.getElementByXPath('//form[@id='fileUploadForm']/input[3]')");

contains an error. You are using nested ' which does not work. You should escape the inner single quote via a \. Also, it should return a WebElement, so you should cast the result to WebElement, not to a String.
js.executeScript(j, ew);

As said above, the second argument should be a WebElement. Also, if you had switched to the correct frame before, you could have found it the usual way via driver.findElement().
document.getElementByClassName() does not exist. The right method name is document.getElementsByClassName() (note the plural "elements"). And it returns a set of elements, so you need to iterate over them in a for loop, or blindly pick the first one ([0]).
document.getElementByClassName(iceInpFileTxt).style.visibility = 'visible';

contains an error, the method (if it existed) takes a string, so you should quote the "iceInpFileTxt".

来源：https://stackoverflow.com/questions/17739529/need-help-for-webdriver-and-javascript-for-a-hidden-file-upload-element

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