Question
Is there a way to get a class 's height on C#?
I am using HTMLAgilitPack to get the nodes. Here is my code.
private async void GetCldInfos()
{
string sURL = @"https://m.investing.com/economic-calendar/";
using (HttpClient clientduplicate = new HttpClient())
{
clientduplicate.DefaultRequestHeaders.Add("User-Agent",
"Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.2; WOW64; Trident / 6.0)");
using (HttpResponseMessage responseduplicate = await clientduplicate.GetAsync(sURL))
using (HttpContent contentduplicate = responseduplicate.Content)
{
try
{
string resultduplicate = await contentduplicate.ReadAsStringAsync();
var websiteduplicate = new HtmlDocument();
websiteduplicate.LoadHtml(resultduplicate);
var News = websiteduplicate.DocumentNode.Descendants("div").Where(o => o.GetAttributeValue("class", "") == "js-economic-calendar").Single();
//get height here
}
catch (Exception ex1)
{
throw ex1.InnerException;
}
}
}
}
Edit: here is an image: 
In the image I can seem to find it's height. Is there a way to get that height programmatically?
I want to implement it in a scrollviewer. I have disabled the browsers scrollbars so I can use mine. And I need to set the scrollviewers height to fit the form...
Accepted Answer
This is a solution using the headless browser Watin to get the height of a DOM element using inline javascript.
First install Watin using Visual Studio Nuget Package Manager Console by executing:
PM> Install-Package WatiN
After the successfull installation of Watin headless browser, you can use it like this to navigate to a page and run a simple javascript to retrieve an element's height:
using WatiN.Core;
...
private void buttonGetElementHeight_Click(object sender, EventArgs e)
{
WatiN.Core.Settings.Instance.MakeNewIeInstanceVisible = false;
IE browser = new IE();
browser.GoToNoWait("https://m.investing.com/economic-calendar/");
browser.WaitUntilContainsText("Filters");
var height = browser.Eval("document.getElementsByClassName('js-economic-calendar')[0].offsetHeight");
labelResult.Text = String.Format("Element height is {0}px", height);
browser.ForceClose();
}
Here is a screen capture of the working button fetching the height:
EDIT
Beware that this is a test and you have to implement some error handling for both C# Watin objects and inline javascript that is being evaluated.
UPDATE
Here is how to do it using Windows.UI.Xaml.Controls.WebView:
private async void webView1_LoadCompleted(object sender, NavigationEventArgs e)
{
var offsetHeight = await webView1.InvokeScriptAsync("eval", new string[] {
"document.getElementsByClassName('js-economic-calendar')[0].offsetHeight.toString()"
});
textBox.Text = offsetHeight;
}
private async void button_Click(object sender, RoutedEventArgs e)
{
webView1.LoadCompleted += webView1_LoadCompleted;
webView1.Navigate(new Uri("https://m.investing.com/economic-calendar/"));
}
My working screen capture:
Popular Answer
I don't think so, as the height is calculated by the browser.
you would have to prerender this type of HTML first then calculate it.
Update: If you are willing to get the height using JavaScript, then its easy.
Get the div that is wrapping your view that you want to use your slimscroll
function getsize() {
var el = $('#divIdYouWantSize'),
//current eight of your div
curHeight = el.height(),
//set div height using CSS style
autoHeight = el.css('height', $(window).height() ).height();
//try animating the resize so it looks pretty
el.height(curHeight).animate({ height: autoHeight }, 100);
};