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Selenium Automation unable to enter username in Way2Automation website

I am trying to do registration for this site
Registration page is inside a popup page.
HTML Code:
<fieldset>
<label>Username:</label>
<input name="username" required="" type="text"/>
</fieldset>
When I try to find the element using below tried code, element is not getting find.
driver.FindElement(By.XPath(".//*[#id='load_form']/fieldset[1]/input")).SendKeys("Kal");
I have also tried this with using CssSelector, but facing the same issue.
driver.FindElement(By.CssSelector("div#load_box form#load_form input[name=username]")).SendKeys("kal");
When I execute above code, I have got an error like element not visible
Can anyone help me on this issue?

Try this below code using xpath locator
driver.FindElement(By.XPath("//input[#name='name']")).SendKeys("Kal");
Explanation of xpath:- Use name attribute of <input> tag.
Suggesstion:- Instead of using absolute xpath, use relative xpath.
Note:- Before reach to this web-element provide some few seconds of wait, so your driver may able to find the web-element. So, you will not get an error like element not visible

Use below xpath:
//*[#id='load_form']/fieldset[6]/input[#name='username']

that site has 2 forms with the id load_form so you're getting the first one which isn't visible since it's the login form. You want the second one which is the register form.
you can use a selector to grab one of the fields that exists on the registration page and then move up to it's parent form and get all descendants that are fieldsets to fill out.

Here is the xpath you can use to pass the text "Dev" into the field labelled with "Name".
driver.findElement(By.xpath("//div[#class='fancybox-overlay fancybox-overlay-fixed']//form[#id='load_form']/fieldset/input[#name='name']")).sendKeys("Dev");
Let me know if this answers your question.

The problem is that there are two username INPUT fields. The way I typically handle this is to find a parent of the element that I want that has an ID or something unique that will distinguish the two elements. In this case, you can use a simple CSS selector,
#load_box input[name='username']
Note the load_box ID that distinguishes the two INPUTs.

Ajax popup on way2automation site is a tricky one because if you look for the username field by name By.name("username"), you will end up with 2 elements - one for username from signup popup, one from singin popup. To avoid this you have to explicity mention the correct element. This can be done via the following code:
webDriver.get("http://way2automation.com/way2auto_jquery/index.php");
WebDriverWait wait = new WebDriverWait(webDriver, 10);
wait.until(ExpectedConditions.visibilityOfElementLocated(By.cssSelector("a[href='#login'"))).click();
wait.until(ExpectedConditions.visibilityOfElementLocated(By.cssSelector(".ajaxlogin input[name='username']"))).sendKeys("my_username");
As you can see in the code I am using class of the login popup - .ajaxlogin. I have used Java, but the concept is the same - you have to refer to the username element via css selector with popup class included: By.cssSelector(".ajaxlogin input[name='username']")

ElementNotVisibleException try to use Xpath to Enter data into a textbox with Selenium

I am using Selenium in C# to Enter data into textboxes on a webpage:
But i am getting this error:
OpenQA.Selenium.ElementNotVisibleException: Element is not currently visible and so may not be interacted with
I'm using #name, but there are 2 controls on the page with name="MinPrice"
heres the HTML:
<div class="form-group for-sale">
<label>Min Price</label>
<input class="form-control" name="MinPrice" min="0" placeholder="Minimum Price" value="" type="number"></input>
and this is the xpath I'm using:
txtMinPrice = Driver.Instance.FindElement(By.Name("MinPrice"));
I also tried using XPath, but similar results:
txtMinPrice = Driver.Instance.FindElement(By.XPath("//input[contains(#name,'MinPrice') and type='number']"));
If anyone has any type of idea....this is driving me nuts.

ElementNotVisibleException exception occurs when selenium can find an element in the DOM but it is not rendered on the screen.
When I have encountered this error before it has been generally caused by one of three things:
Selenium is trying to interact with an object that is present in the DOM but has not yet rendered on the screen, in which case you might consider adding some type of delay. (Avoid sleep if you can but it is useful for debugging)
The element is below the visible screen, in which case you would need to scroll to interact with it.
There is an overlapping element that is blocking the display of the element.

Add a sleep(10) in to make sure everything on the page has loaded first before any user actions are preformed. If that doesn't work also add
driver.manage().window().maximize() at the start of your test to make sure all the page elements is in view.
If that doesn't work its your xpath. Try something like //*[#class="form-group for-sale"]/input
Or use the Firefinder add on in mozilla firefox to check your xpath is valid and exists on the page.

Selenium is good at scrolling down to view an item, but when it comes to Scrolling back up it's a PiA, and usually throws that exception. I usually just do something like
element.SendKeys(Keys.Home);
Thread.Sleep(100);

Execute a java script to make an element visible

I'm trying to automate the use of a website using Selenium, at one time I want to click on a hidden button defined this way :
<body>
<div class="smenu" id="smenu4">
<input tabIndex="-1" type="button" onclick="SearchEng" value="FindEng" />
<!--> Lots of inputs <!-->
</div>
</body>
I already tried to simply click the button, but it doesn't work. I can select it and retrieve information though. That's why I'm now trying to run a javascript to make the button visible before clicking it. Here is my code :
IWebElement element = driver.FindElement(By.XPath("//div[#id='smenu4']/input[#value=FindEng"));
String js = "arguments[0].style.height='auto'; arguments[0].style.visibility='visible';";
((IJavaScriptExecutor)driver).ExecuteScript(js, element);
The thing is nothing happens when I launch it. Is it possible that I can't run scripts ? Can you run them on any website ? - I use internet explorer 11, windows 7. Thanks !

Inspect the element in your Browser and check that what is the reason that the element is invisible. Or just simply compare the element when it is visible or not. Possible reasons:
The element is not in the DOM yet.
The element hasn't got width and/or height.
visibility parameter. (http://www.w3schools.com/cssref/pr_class_visibility.asp)
display parameter. (http://www.w3schools.com/cssref/pr_class_display.asp)
When you know the reason, you will know the solution :)

ASP and TypeScript issue: input value changed with jQuery not caught using binding

In my viewmodel I have the attribute Trefwoord:
public trefwoord: KnockoutObservable; in a class in .ts file
"Trefwoord": this.trefwoord(),
The binding on the cshtml file is the following:
<div>
<input type="text" id="trefwoord" data-bind="text: trefwoord" />
</div>
When I change the value of the textbox with the keyboard and hit the search button (POST page)
and set a breakpoint the value of Trefwoord is inside the viewmodel parameter.
But when I do the changing with jQuery: $("#trefwoord").val('value');
Then the value set by jQuery is not being send or even noticed.
Could someone please help me out

I usually update items via the observable - this causes the UI to update automatically (this is what I'm using Knockout for). For example...
myModel.trefwoord('value');
Given that this.trefwoord is a KnockoutObservable...
this.trefwoord('value');
And the input changes automatically.

Is making an asp:Button control invisible enough to be sure users won't be able to click it?

I'm making a simple website that lists files from a certain folder. If the user has admin rights, the user can delete files by clicking the "Delete" button.
In my .aspx file, I have the following code:
<asp:Button runat="server" Text="Delete" OnCommand="FileList_Delete"
CommandArgument='<%#Eval("FilePath")%>' Visible='<%CurrentUserIsAdmin()%>' />
So the button will not be rendered if CurrentUserIsAdmin() returns false.
The button is rendered like this:
<input type="submit" name="ctl00$ctl00$MainContent$LocalMainContent$FileList$ctrl0$ctl17" value="Delete" />
My question is: Can I be sure that this method is safe against a known-code attack if the user modifies the webpage client-side aiming to click this invisible button? Or do I have to take precautions in the code-behind and verify the user's rights in the button-clicked event?

Yes, setting a button's Visible property to false is enough to prevent its Click and Command events from being raised, as long as you don't turn off the default WebForms security features.
You can easily test this by temporarily adding an always-visible <input> element to your .aspx with the same name as the rendered <asp:Button>:
<input type="submit"
name="ctl00$ctl00$MainContent$LocalMainContent$FileList$ctrl0$ctl17"
value="Fake Delete" />
Click the fake Delete button when the real Delete button is invisible. You should get an "Invalid postback or callback argument. Event validation is enabled..." exception.
Important notes:
Don't set a button's Visible property to false within an if (!IsPostBack) block because it's possible for an attacker to bypass that check. See this answer for more information.
ASP.NET event validation must be enabled (which it is by default). So don't turn it off by adding EnableEventValidation="False" to the #Page directive or <pages enableEventValidation="false" /> to Web.config.
Never ever ever disable view state validation by adding EnableViewStateMac="False" to the #Page directive or <pages enableViewStateMac="false" /> to Web.config. This would allow an attacker to tamper with the hidden __EVENTVALIDATION field and do other nasty things.
If you choose a derive a custom Button server control from the standard Button control, make sure you add the [SupportsEventValidation] attribute to the derived class.
If you choose to create a custom Button server control from scratch, call RegisterForEventValidation and ValidateEvent in the appropriate places.

They simply won't see the button or even 'recieve' it. Your server will not generate any button code sent to the person.
You have to think of it this way. The user never sees any asp code or is able to process it. They only receive html. You can further ensure this by looking at the html and seeing what has been generated.
So in that regard you are safe.

My question is: can I be sure that this method is safe against known-code attack if user modifies the webpage client-side aiming to click this invisible button? Or I have to make precautions in CodeBehind and verify user rights in button clicked event?
I personally would also put another piece of code in the click event. Verifying that click comes from the user who is authorized to click that button.
What you could also do is to add a button from code behind as this (Assuming you are putting this button into a panel called pnlButtons):
Button btnDeleteList = new Button();
btnDeleteList.Text = "Delete List";
btnDeleteList.Click += btnDeleteList_Click;
pnlButtons.Controls.Add(btnDeleteList);
In other words, if user is Admin - add a button, if user is not an admin - do not add. In this case you do not have to play around with visibility.
hope this helps.