I want to hide an HTML tag in my web browser.The problem that I have is the fact that I must not use javascript.
I have come up with this block of code:
public void HideHTMLTag(string ControlID)
{
HtmlDocument doc = webBrowser1.Document;
HtmlElement HTMLControl = doc.GetElementById(ControlID);
HTMLControl.Style = "'display: none;'";
webBrowser1.Refresh();
}
I call this in a button event.I appreciate your help.
Please try the code in documentCompleted event..
URL:- Hiding HTML tag in webbrowser
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
HtmlDocument doc = webBrowser1.Document;
HtmlElement HTMLControl = doc.GetElementById("question-header");
//HTMLControl.Style = "'display: none;'";
if (HTMLControl != null)
{
HTMLControl.Style = "display: none";
}
}
Related
I have a webbrowser control in a C# winform, which loads the following text:
<head>
<link rel="stylesheet" type="text/css" href="d:/git/ArticleScraper/reports/default.css">
</head>
Can I find the address of the css (d:/git/ArticleScraper/reports/default.css) and load it in a textbox editor? It could be a local or online css file with absolute or relative address.
I didn't find any related property or method in the webbrowser control.
WebBrowser control has an event DocumentComplete.
It is triggered once your document/file loading has been completed.
First, register to the event:
webBrowser1.DocumentCompleted += new System.Windows.Forms.WebBrowserDocumentCompletedEventHandler(this.WebBrowser1_DocumentCompleted);
In the event callback, search for "LINK" element tag.
private void WebBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var browser = sender as WebBrowser;
var document = browser.Document;
foreach(HtmlElement link in document.GetElementsByTagName("LINK"))
{
// this is your link:
link.GetAttribute("href")
}
}
The following code will help you. This one is using LINQ query
private void Form1_Load(object sender, EventArgs e)
{
webBrowser1.Navigate(#"D:\DemoFolder\demo.html");
}
private void button1_Click(object sender, EventArgs e)
{
// Get a link
HtmlElement link = (from HtmlElement element in webBrowser1.Document.GetElementsByTagName("link") select element)
.Where(x => x.GetAttribute("rel") != null && x.GetAttribute("rel") == "stylesheet" && x.GetAttribute("href") != null).FirstOrDefault();
if (link != null)
{
// Get CSS path
string path = link.GetAttribute("href");
textBox1.Text = path;
}
}
The following is a screenshot of the output
I'm writing a software that gets the content from URL. When working on that, I run into to problem that I can not get exactly the HTML content after the java script finished.
There are some websites that renders HTML by java-script, some do not support browsers which does not run js.
I tried using System.Windows.Controls.WebBrowser with WebBrowser.Document in LoadCompleted but no luck.
After that, I tried the OpenWebkitSharp library. On the UI, it showes the content of website correctly, but with code Document in DocumentCompleted, it still returns the content which does not rendered by java-script.
Here is my code:
...
using WebKit;
using WebKit.Interop;
public MainWindow()
{
windowFormHost = new System.Windows.Forms.Integration.WindowsFormsHost();
webBrowser = new WebKit.WebKitBrowser();
webBrowser.AllowDownloads = false;
windowFormHost.Child = webBrowser;
grdBrowserHost.Children.Add(windowFormHost);
webBrowser.Load += WebBrowser_Load;
}
private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var contentHtml = ((WebKitBrowser)sender).DocumentAsHTMLDocument;
}
The contentHtml has value which is not rendered after java-script finished.
Do solve this problem, I have added some trick into my code to get the full Html content after java-script finished.
using WebKit;
using WebKit.Interop;
using WebKit.JSCore; //We need add refrence JSCore which following with Webkit package.
public MainWindow()
{
InitializeComponent();
InitBrowser();
}
private void InitBrowser()
{
windowFormHost = new System.Windows.Forms.Integration.WindowsFormsHost();
webBrowser = new WebKit.WebKitBrowser();
webBrowser.AllowDownloads = false;
windowFormHost.Child = webBrowser;
grdBrowserHost.Children.Add(windowFormHost);
webBrowser.Load += WebBrowser_Load;
}
private void WebBrowser_Load(object sender, EventArgs e)
{
//The ResourceIntercepter will throws exception if webBrowser have not finished loading its components
//We can not use DocumentCompleted to load the Htmlcontent. Because that event will be fired before Java-script is finised
webBrowser.ResourceIntercepter.ResourceFinishedLoadingEvent += new ResourceFinishedLoadingHandler(ResourceIntercepter_ResourceFinishedLoadingEvent);
}
private void ResourceIntercepter_ResourceFinishedLoadingEvent(object sender, WebKitResourcesEventArgs e)
{
//The WebBrowser.Document still show the html without java-script.
//The trict is call Javascript (I used Jquery) to get the content of HTML
JSValue documentContent = null;
var readyState = webBrowser.GetScriptManager.EvaluateScript("document.readyState");
if (readyState != null && readyState.ToString().Equals("complete"))
{
documentContent = webBrowser.GetScriptManager.EvaluateScript("$('html').html();");
var contentHtml = documentContent.ToString();
}
}
Hope this one can help you.
I have a WebBrowser control:
<phone:WebBrowser Name="ArticleContent" Navigating="ArticleContent_Navigating" Navigated="ArticleContent_Navigated" />
And i get article from server like a HTML string:
string Article = "<p>Sometext</p><span style=\"font-family:"Arial","sans-serif";mso-fareast-font-family:"Arial Unicode MS"; mso-fareast-language:LV\">artjomgsd#inbox.lv</span>";
I do this:
ArticleContent.NavigateToString(Article);
And have this function to stop loading icon:
private void ArticleContent_Navigated(object sender, NavigationEventArgs e)
{
HideLoading();
}
And this function to handle links ( to open links in external browser):
private void ArticleContent_Navigating(object sender, NavigatingEventArgs e)
{
e.Cancel = true;
WebBrowserTask webBrowserTask = new WebBrowserTask();
webBrowserTask.Uri = new Uri(e.Uri.ToString(), UriKind.Absolute);
webBrowserTask.Show();
}
My question is, why when i tap E-mail hyperlink nothing hapens? It even doesn't enter ArticleContent_Navigating() function?
P.S. I want to open MailTask on clicking on mail hyperlink.
Unfortunately, mailto: it not supported by the WebBrowser control on Windows Phone.
What you can do is inject Javascript in the HTML that will enumerate all a tags and wire up an onclick event. That event will call window.external.Notify which will in turn raise the ScriptNotify event of the WebBrowser, with the URL as a parameter.
It is a little complicated but I think it's the only option for dealing with the mailto protocol on Windows Phone.
Here is some sample code:
// Page Constructor
public MainPage()
{
InitializeComponent();
browser.IsScriptEnabled = true;
browser.ScriptNotify += browser_ScriptNotify;
browser.Loaded += browser_Loaded;
}
void browser_Loaded(object sender, RoutedEventArgs e)
{
// Sample HTML code
string html = #"<html><head></head><body><a href='mailto:test#test.com'>Send an email</a></body></html>";
// Script that will call raise the ScriptNotify via window.external.Notify
string notifyJS = #"<script type='text/javascript' language='javascript'>
window.onload = function() {
var links = document.getElementsByTagName('a');
for(var i=0;i<links.length;i++) {
links[i].onclick = function() {
window.external.Notify(this.href);
}
}
}
</script>";
// Inject the Javascript into the head section of the HTML document
html = html.Replace("<head>", string.Format("<head>{0}{1}", Environment.NewLine, notifyJS));
browser.NavigateToString(html);
}
void browser_ScriptNotify(object sender, NotifyEventArgs e)
{
if (!string.IsNullOrEmpty(e.Value))
{
string href = e.Value.ToLower();
if (href.StartsWith("mailto:"))
{
EmailComposeTask email = new EmailComposeTask();
email.To = href.Replace("mailto:", string.Empty);
email.Show();
}
}
}
Problem with your Html tag just write Http// before mailto:artjomgsd#inbox.lv\ on your link it will work fine
like bellow
"<p>Sometext</p><span style=\"font-family:"Arial","sans-serif";mso-fareast-font-family:"Arial Unicode MS"; mso-fareast-language:LV\">artjomgsd#inbox.lv</span>";
i tested this code in my application now its work..
For example, using code and no user input, how would I have my program click the "Search" button on google (assuming I've already filled in the search box and am at google.com)
webBrowser1.Navigate("http://www.google.com");
If you have an ID use this:
webBrowser1.Document.GetElementById("id").InvokeMember("click");
If you have TagName use this
webBrowser1.Navigate("http://www.google.com");
In Web Browser DocumentCompleted event
HtmlElement textElement = webBrowser1.Document.All.GetElementsByName("q")[0];
textElement.SetAttribute("value", "your text to search");
HtmlElement btnElement = webBrowser1.Document.All.GetElementsByName("btnG")[0];
btnElement.InvokeMember("click");
If you have name Class use this:
HtmlElementCollection classButton = webBrowser1.Document.All;
foreach (HtmlElement element in classButton)
{
if (element.GetAttribute("className") == "button")
{
element.InvokeMember("click");
}
}
For adding text in a TextBox to search google.com, use this:
webBrowser1.Document.GetElementById("gs_tti0").InnerText = "hello world";
Try the following code:
public WebBrowser webBrowser1 = new WebBrowser();
private void WebForm_Load(object sender, EventArgs e)
{
try
{
webBrowser1.Height = 1000;
webBrowser1.Width = 1000;
this.Controls.Add(webBrowser1);
webBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(WebBrowser_DocumentCompleted);
this.webBrowser1.Navigate("www.google.com.au");
}
catch
{ }
Write down the following function in your c# form:
public void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var webBrowser = sender as WebBrowser;
webBrowser.DocumentCompleted -= WebBrowser_DocumentCompleted;
HtmlElement textElement = webBrowser.Document.All.GetElementsByName("q")[0];
textElement.SetAttribute("value", "mlm company");
HtmlElement btnElement = webBrowser.Document.All.GetElementsByName("btnG")[0];
btnElement.InvokeMember("click");
}
In addition to using InvokeMember and others, if your web page has issues responding when called by ID or Class, you can try using {TAB} & {ENTER} using the SendKeys class within .NET. I've written a lot of scripts for web pages and have found that I've had to use a combination of both (even though SendKeys is far messier than the methods in #AleWin's answer).
Here is the link to the SendKeys class.
How to convert HtmlDocument.DomDocument to string?
This example is a bit convoluted, but, assuming you have a form called Form1, with a WebBrowser control called webBrowser1, the variable content will contain the markup that forms the document:
private void Form1_Load(object sender, EventArgs e)
{
webBrowser1.Url = new Uri(#"http://www.robertwray.co.uk/");
}
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
var document = webBrowser1.Document;
var documentAsIHtmlDocument3 = (mshtml.IHTMLDocument3)document.DomDocument;
var content = documentAsIHtmlDocument3.documentElement.innerHTML;
}
The essential "guts" of extracting it from the HtmlDocument.DomDocument is in the webBrowser1_DocumentCompleted event handler.
Note: mshtml is obtained by adding a COM reference to 'Microsoft HTML Object Library` (aka: mshtml.dll)
It would be easier to use the HtmlDocument itself, rather than its DomDocument property:
string html = htmlDoc.Body.InnerHtml;
Or even simpler, if you have access to the WebBrowser containing the document:
string html = webBrowser.DocumentText;