Develop Reference

How to get an element where the attribute by which I select it can change in Selenium Webdriver C#?

I want to get the src attribute of some elements like this:
<div class="product-tile restored" data-v-27bc931c=""><a href="/p/apple-iphone-11-pro/R1NFM0000000T7"
class="product-tile__link">
<div class="product-tile__image product-img-front">
<img alt="Apple iPhone 11 Pro"
data-src="/img?width=300&height=300&action=resize&url=/catalog/product/6/f/6f7466aef1ae14ee4fe9764531ef69a1.jpg"
src="/img?width=300&height=300&action=resize&url=/catalog/product/6/f/6f7466aef1ae14ee4fe9764531ef69a1.jpg"
lazy="loaded">
<div class="image-loading"></div>
<!---->
</div>
<div class="product-tile__description">
<div title=" iPhone 11 Pro" class="product-tile__name"><span class="product-tile__brand">Apple</span> iPhone
11 Pro
</div>
<!---->
</div>
<div class="product-tile__footer">
<div class="product-tile__condition">
<div>Various conditions<span class="colors"><span class="dot">•</span>4 Colors</span></div>
</div>
<div class="product-tile__price">
<div class="price" data-v-678b2a80="">
<div class="current-price" data-v-678b2a80="">
<div class="from" data-v-678b2a80="">from</div>
<div data-testid="productPrice" class="amount" data-v-678b2a80="">
$647.00
</div>
</div>
<div data-v-678b2a80=""><span class="amount amount--del" data-v-678b2a80="">$1049.00</span> <span
class="amount amount--save" data-v-678b2a80="">Save
$402.00</span></div>
</div>
</div>
</div>
<div class="product-tile__loading"></div>
</a>
<!---->
</div>
I'm using driver.FindElement(By.CssSelector("img[lazy='loaded")) but the problem is that this attribute can also be loading. When I try driver.FindElement(By.TagName("img")) that doesn't work.
I don't want to use Try and Catch. How to can I get the src? Here is the website that i want to scrape

To consider both the cases, when value of lazy attribute is loaded and loading, you can use comma seperated values for the css-selectors and use the following locator strategy:
driver.FindElement(By.CssSelector("img[lazy='loaded'], img[lazy='loading']"))
References
You can find a couple of relevant detailed discussions in:
Any built-in way for branching waits with OR conditions?
WebDriverWait for multiple conditions (OR logical evaluation)
selenium two xpath tests in one

How do I check checkboxes on a page using IWebDriver in selenium C#?

I need to select multiple checkbox to Submit the form and the following code response in HTML format.
Here i have 4 check box. when i have launch the browser then first 3 checkbox is always checked and last one always Unchecked. Now i want first 3 checkbox should be uncheck and last one will be checked .how do i this with selenium c#
<div class="formSubSection">
<h4>
Details:</h4>
<div class="formField">
<div class="formFieldCheckBox">
<span title="Imported selector"><input id="aul00_ContentPlaceHolder1_aul02_chkVan" type="checkbox" name=aul00$ContentPlaceHolder1$ctl02$chkVan" checked="checked"><label for="aul00_ContentPlaceHolder1_ctl02_chkVan"> Is the Helpdesk?</label></span>
</div>
</div>
<div class="formField">
<div class="formFieldCheckBox">
<span title="home selector"><input id="aul00_ContentPlaceHolder1_ctl02_chkHome" type="checkbox" name="aul00$ContentPlaceHolder1$ctl02$chkHome" checked="checked"><label for="ctl00_ContentPlaceHolder1_aul02_chkMotorHome"> home?</label></span>
</div>
</div>
<div class="formField">
<div class="formFieldCheckBox">
<span title="Imported selector"><input id="aul00_ContentPlaceHolder1_ctl02_chkHorseBox" type="checkbox" name="aul00$ContentPlaceHolder1$aul02$chkHorseBox" checked="checked"><label for="aul00_ContentPlaceHolder1_aul02_chkHorseBox"> Is the vehicle?</label></span>
</div>
</div>
<div class="formField">
<div class="formFieldCheckBox">
<span title="car selector"><input id="aul00_ContentPlaceHolder1_aul02_chkCar" type="checkbox" name="aul00$ContentPlaceHolder1$ctl02$chkCar" checked="checked"><label for="ctl00_ContentPlaceHolder1_aul02_chkCar"> Is the Driver?</label></span>
</div>
</div>
</div>

It depends are you web elements have dynamical id and names.
I wold suggest solution to get all 4 elements (according to your post, I do not know rest of the DOM) and just to iterate trought the for loop. Something like
for(int i=0;i<driver.findElements(By.Class("formFieldCheckBox"));i++)
{
if(i>=5)
{
if(!driver.findElements(By.Class("formFieldCheckBox")).get(i).isSelected())
driver.findElements(By.Class("formFieldCheckBox")).get(i).click();
}
else
{
if(driver.findElements(By.Class("formFieldCheckBox")).get(i).isSelected())
driver.findElements(By.Class("formFieldCheckBox")).get(i).click();
}
}
This is the Java solution, but almost same code is for C#. Try it and let me know did it help.

Form post to another page

I am fairly new to C# and asp.net and am having trouble showing something submitted in a form. The form element is a tag. The drop-down info is pulled from a data base and displays correctly. It's just getting it to post to another page after the form is submitted is where I am having the problem. Any help would be appreciated.
Contact.aspx:
<form action="Default.aspx" method="post" data-transition="pop">
<div data-role="fieldcontain">
<label for="topEmails">Business Entity ID:</label>
<select name="topEmails" id="topEmails" data-native-menu="false"
runat="server">
</select>
</div>
<input type="submit" data-iconpos="right" data-inline="true"
data-icon="plus" name="sendMessage" id="sendMessage" value="Send Info">
</form>
Contact.aspx.cs:
AdventureWorks2012DataContext db = new AdventureWorks2012DataContext();
var emails = (from b in db.EmailAddresses
select new { b.EmailAddressID, b.BusinessEntityID }).Take(20);
topEmails.DataTextField = "BusinessEntityID";
topEmails.DataValueField = "BusinessEntityID";
topEmails.DataSource = emails;
topEmails.DataBind();
Default.aspx.cs:
FormSuccessBID.InnerHtml = "Business Entity ID: " + Request.Form["topEmails"] + "";
Any ideas why this wouldn't be working?
Update:
Contact.aspx:
<asp:Content runat="server" ID="BodyContent" ContentPlaceHolderID="MainContent">
<h2 style="text-align: center;">Contact Kyle</h2>
<form action="Default.aspx" method="post" data-transition="pop">
<div data-role="fieldcontain">
<label for="userFName">First Name:</label>
<input type="text" name="firstName" id="uFName">
</div>
<div data-role="fieldcontain">
<label for="userLName">Last Name :</label>
<input type="text" name="lastName" id="uLName">
</div>
<div data-role="fieldcontain">
<label for="productsCategories">Products:</label>
<select name="productCategories" id="productCategories" data-native-menu="false" runat="server"></select>
</div>
<div data-role="fieldcontain">
<label for="topEmails">Business Entity ID:</label>
<select name="topEmails" id="topEmails" data-native-menu="false" runat="server"></select>
</div>
<input type="submit" data-iconpos="right" data-inline="true" data-icon="plus" name="sendMessage" id="sendMessage" value="Send Info">
</form>
</asp:Content>

You're missing "runat='server'" in your form definition.
In ASP.NET you're also allowed one form per page. Not sure from what you're posted if you're trying to put multiple forms on there, but if you are, it's not going to work.
I think all you need to do to accomplish what you want is have an ASP.NET button on the page, with the postbackURL set to the page you want to go to. (Of course, you need to do this in a server-side form)
I think you're mixing ASP.NET methods with other, different technologies. (From the look of it, you probably used classic ASP or PHP perhaps?)
If you can't use .NET for whatever reason, the ID/name of the field is not going to be what you're expecting. You need to inspect the form post and find its value - something along the lines of "clt00_somethingelse_topEmails". (Again, this is going to be a heck of a lot easier if you use the .NET way of doing things, but you may have a requirement not to)

Linq to xml - access deep element

In C# i need to access element that is nested in many other elements. I could write a query by naming all of elements but that would be very time consuming. Is there any easy way to do this or maybe some generator?
for example i have a xml:
<div id="list_offers">
<div class="container">
<div id="header">
<div class="row">
<div class="space-on-sides">
<div class="sixteen columns relative">
<div class="logo">
<a href="/">
<img src="/images/design_resp/design/logo_profesia.png" width="113" height="76" alt="PROFESIA.SK - práca, zamestnanie, ponuky práce, brigáda, voľné pracovné miesto" title="PROFESIA.SK - práca, zamestnanie, ponuky práce, brigáda, voľné pracovné miesto" />
</a>
</div>
<div class="right-panel">
<a class="login-company small red button nice radius right hide-on-phones margin-on-left" title="Vstup pre firmy" href="/login_person.php?action=company_login">Vstup pre firmy</a>
<a class="login-company small red button nice radius right show-on-phones margin-on-left" href="/login_person.php?action=company_login">Firmy</a>
<a rel="nofollow" id="login_modal" class="small gray button nice radius right" title="Prihláste sa do konta" href="/login_person.php?action=login">Prihlásiť</a>
<div class="search">
<div class="relative hide-on-phones">
<form name="fulltextsearch" id="fulltextsearch" action="/search.php" method="get" onsubmit="if(document.getElementById('search').value=='HÄľadanie') return false; return true;" class="nice" />
<input name="which_form" type="hidden" value="simple" />
<input name="tab_name" type="hidden" />
<input name="search_anywhere" type="text" id="search" placeholder="HÄľadanie" tabindex="1" class="input-text expand" />
<input name="submit_search_simple" type="image" src="/images/design_resp/design/blank.png" alt="HÄľadaĹĄ" class="ico search-nosprite" /></form>
</div>
<div class="show-on-phones">
<a title="HÄľadajte ponuky práce podÄľa rĂ´znych kritĂ©riĂ">
</a>
</div>
</div>
<div class="row-header-favorite">
<div class="header-favorite">
<a title="Moje vybrané pracovné ponuky" class="ico-shopping-cart-toppanel" rel="nofollow" href="/user_details.php?action=show_my_offers&ref_top_panel=157">0</a>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
and i need access:
input name="tab_name" type="hidden"

You can use Linq to xml
var xDoc = XDocument.Load(pathToXmlFile); //XDocument.Parse(xmlstring);
var input = xDoc.Descendants("input")
.First(i=>(string)i.Attribute("name")=="tab_name");
XPath can be used too
var input = xDoc.XPathSelectElement("//input[#name='tab_name']");

If you need to access that element on server side, you'll need to add a runat attribute there (like this: runat="server"), to make it a server side control. I would strongly suggest making it a control of your page, then, so you can access it like any other variable. You would have to give it an ID, so at the very least you could fetch it through that property.
But! your problem seems to be more client side related, so I strongly, really strongly suggest you use jQuery instead. Get jQuery in your site, and it becomes as easy as:
$("input[name='tab_name']");
Or better yet, if you give it an ID:
$("#idYouGaveTotheField");

integrating recaptcha (with custom look) with asp.net

Im using asp.net/c# weborms. I've added recaptcha to the form and used what is on their site. It needs a custom look hence it's like this:
<div id="recaptcha_widget" style="display:none">
<div id="recaptcha_image"></div>
<div class="recaptcha_only_if_incorrect_sol" style="color:red">Incorrect please try again</div>
<span class="recaptcha_only_if_image">Enter the words above:</span>
<span class="recaptcha_only_if_audio">Enter the numbers you hear:</span>
<input type="text" id="recaptcha_response_field" name="recaptcha_response_field" />
<div>Get another CAPTCHA</div>
<div class="recaptcha_only_if_image">Get an audio CAPTCHA</div>
<div class="recaptcha_only_if_audio">Get an image CAPTCHA</div>
<div>Help</div>
</div>
<script type="text/javascript"
src="http://api.recaptcha.net/challenge?k=your_public_key">
</script>
<noscript>
<iframe src="http://api.recaptcha.net/noscript?k=your_public_key"
height="300" width="500" frameborder="0"></iframe><br>
<textarea name="recaptcha_challenge_field" rows="3" cols="40">
</textarea>
<input type="hidden" name="recaptcha_response_field"
value="manual_challenge">
</noscript>
what do i need to do in the button_click method in the code behind iof the form to check if the words eneterd by the user is correct. same for audio.
Thanks

Why don't you use the control that is delivered with reCaptcha? Here is the control and a quickstart.
reCaptcha Quickstart & Control

Like other validations you just need to check if(Page.IsValid) in behind code. just note that you have to add recaptcha control in your code and then add your customs them.
<recaptcha:RecaptchaControl ID="recaptcha" runat="server" PublicKey="your_public_key"
PrivateKey="Your_private_key" Theme="custom" />
<div id="recaptcha_widget" style="display:none">
<div id="recaptcha_image"></div>
<div class="recaptcha_only_if_incorrect_sol" style="color:red">Incorrect please try again</div>
...