So I have a website which I load into my form's webbrowser control. After loading the document, I retrive the webbrowser.documenttext . I am looking here to parse specific table. But I am not finding the table in here but I see that it is being dispayed in the form browser.
I tell you that this specific table is being loaded/appended to doc by already loaded javascript code.
When I right click and select the "View Source" , it pops the document with correct html.
My question is how can I get the same document referenced by ViewSource or is there any way to get the document what is being rendered on form?
Instead of using Webbrowser Control use HtmlAgilityPackage to parse data based on your need.
var html = new HtmlDocument();
html.LoadHtml(new WebClient().DownloadString("http://www.asp.net"));
var root = html.DocumentNode;
var commonPosts = root.Descendants().Where(n => n.GetAttributeValue("class",
"").Equals("common-post"));
Similar Existing Question
The above issue was very similar to my issue and after going thorough the answer I learnt that I somehow need to wait and poll the webbrowser to get the dynamic content.
I did not really implement the code provided in the answer but I changed my documentCompleted event as async and provided a await task delay of 5s
private async void Browser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
await Task.Delay(5000);
var html= wb.Document.GetElementsByTagName("HTML")[0].OuterHtml;
}
Now I get the dynamic result. Thanks, I am feeling now.
Related
In System Forms Webbrowser, Below is the code to Open New HTML Document each time webrowser is updated with new HTML content
webBrowser1.Navigate("about:blank");
webBrowser1.Document.OpenNew(true).Write(html);
In Microsoft.Web.WebView2.WinForms.WebView2 I can use navigate to string like below to update HTML string.
webBrowser.NavigateToString(html);
But this doesn't open a new document. It updates on same.
Is there a way in WebView2 to set HTML content on the new document each time content is changed?
There's a javascript document.open(type, replace) that can help you to achieve the same functionality as the old WebBrowser control's Document.OpenNew(replaceInHistory).
To use it with WebView2, you need to call ExecuteScriptAsync, for example:
await webView21.EnsureCoreWebView2Async();
await webView21.ExecuteScriptAsync(
"document.open('text/html', true);" +
"document.write('<html><body>XXXXXXXXXX</body></html>');");
It will open a new document and replaces the history.
I am trying to retrieve whenever the website displays the following message from a jQuery event. Initially this HTML inst displayed in the HTML.
<div id="toast-container" class="toast-top-right"><div class="toast toast-error" aria-live="assertive" style="display: block;"><div class="toast-message">Check email & password.</div></div></div>
My assumption is, that the webBrowser1.DocumentText.Contains is only looking from the initial load of the content.
So I thought maybe some sort of timer would work every 5 seconds, looking to see if the code has changed - but I don't even think this is right as it's checking the code that's already loaded repeatedly?
private void timer2_Tick(object sender, EventArgs e)
{
// Checks for any errors on sign in page
if (webBrowser1.DocumentText.Contains("toast toast-error"))
{
// Toast Notifications
var signinErrorNotification = new Notification("Error", "Please check your email and password are correct.", 50, FormAnimator.AnimationMethod.Fade, FormAnimator.AnimationDirection.Left);
signinErrorNotification.Show();
}
}
How do I go about getting the latest code that's been affected by any jQuery.
P.S. My c# level is beginner.
The Document property should give you what you need.
Notice that the docs for DocumentText say
Gets or sets the HTML contents of the page displayed in the WebBrowser
control.
For Document they say
Gets an HtmlDocument representing the Web page currently displayed in the WebBrowser control.
To me that's saying that DocumentText is like the starting document and Document is the current DOM. Also see https://learn.microsoft.com/en-us/dotnet/framework/winforms/controls/how-to-access-the-managed-html-document-object-model
Good Morning,
I have a Web browser embedded within a C# winform. When loading the web-browser, it loads in a local file and displays the page with no issues.
I then have a button with an OnClick method which does the following:
private void button1_Click(object sender, EventArgs e) {
this.webBrowser1.Navigate("about:blank");
HtmlDocument doc = this.webBrowser1.Document;
doc.Write(String.Empty);
this.webBrowser1.DocumentText = //PathToDocumentText;
}
This was taken from this SO question and causes the web browser to freeze up. On hover shows the cursor with the loading spinning icon.
I am simply wanting to change the document text from one local file to another (both work if I load them in manually OnLoad).
Any help appreciated.
this.webBrowser1.Navigate("about:blank");
this.webBrowser1.Document.OpenNew(false);
this.webBrowser1.Document.Write(//pathtoFile);
this.webBrowser1.Refresh();
This does the trick, Thanks to anyone who looked at this.
I have a C# winforms application that opens a pdf file in a webbrowser control. It opens to whatever page I want just fine however if I want to change page (go to a bookmark) the webbrowser stops working. I found this article which explains "Basically Webbrowser.Navigate(url) ONLY fires if the url changes. If it
doesn't change it uses a cached version of the web page." however I am calling navigate with a Uri, not a string url like this:
webBrowser.Navigate(new Uri(url));
My question is simply: how can I navigate to another page in the same pdf file, after I have opened the file in the web browser?
Of course I figure out the problem 2 mins after posting a question. I'll post my solution in hopes it helps someone else anyway;
So to make this work I used this workaround:
webBrowser.AllowNavigation = true;
webBrowser.Hide();
webBrowser.Navigate("about:blank");
await Task.Delay(1000);
webBrowser.Navigate(new Uri(url));
webBrowser.Show();
This code may be useful to you.
public static void GetAllText(WebBrowser webBrowser,int toPageNum)
{
webBrowser.Focus();
for(int i = 0; i < toPageNum; i++)
SendKeys.Send("{PGDN}");
}
I have a really strange problem in C#:
First I use the WebBrowser control and the navigate method to browse.
wb_email.Navigate("https://registrierung.web.de");
Now I can change the innerText of htmlelements without any problems.
wb_email.Document.GetElementById("id4").InnerText = "Alexander";
But when I reload the page by simply using the navigate method with the same url again,
I get a null exception. It seems as he can't find the element.
So I used an inspector for Firefox to see if the htmlelement really changed, after reloading.
But only the url is changing, htmlelements are all the same.
What I'm doing wrong?
You're just changing the DOM in the displayed page. When you reload the page, the WebBrowser instance will just refresh the DOM from the server again and lose your changes.
The WebBrowser class isn't designed for editing rendered pages inside itself, as it's basically just a wrapper to an embedded Internet Explorer instance.
Make sure the website has finished loading before accessing any element. Like:
webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser_DocumentCompleted);
void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
// Access elements here
}