i have application and i need to add text programmatically to some fields it works in most pages but in www.google.com when i try to but value to search, it did not work until i clicked on the text area then the value appear
is there any way to get around this
my code:
HtmlElementCollection el = webBrowser1.Document.All;
foreach (HtmlElement H in el)
{
if (H.GetAttribute("type").Equals("text") )
H.SetAttribute("value", sendtext);
}
i tried to click on it programmatically
object obj = H.DomElement;
System.Reflection.MethodInfo mi = obj.GetType().GetMethod("click");
mi.Invoke(obj, new object[0]);
also it does not work
Project + Add Reference, Browse tab and select c:\windows\system32\mshtml.tlb (.dll on earlier Windows versions). This gives you access to the native COM interface that the DomElement property returns. So you can write your code cleanly like this:
var obj = (mshtml.IHtmlElement)H.DomElement;
obj.click();
Or you can do it a bit less cleanly with the HtmlElement.InvokeMember() method:
H.InvokeMember("click");
A sample form that runs a google query using this technique:
public partial class Form1 : Form {
public Form1() {
InitializeComponent();
webBrowser1.Url = new Uri("http://google.com");
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
}
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) {
if (webBrowser1.Url.Host.EndsWith("google.com")) {
HtmlDocument doc = webBrowser1.Document;
HtmlElement ask = doc.All["q"];
HtmlElement lucky = doc.All["btnI"];
ask.InnerText = "stackoverflow";
lucky.InvokeMember("click");
}
}
}
Related
I am using C# to login to a local web page.
I am using webBrowser in order to display the page after the log.
First, I navigate to page then I fill the username & password then I invoke a click.The element to be clicked is recognized; so I assume that the click happened. But the result page isn't showing, nothing appears when I execute.
I tried this:
public WebBrowser webBrowser;
public MainWindow()
{
InitializeComponent();
webBrowser = new WebBrowser();
webBrowser.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(LoginEvent);
webBrowser.AllowNavigation = true;
webBrowser.Navigate("http://192.168.1.100/login.html");
}
private void LoginEvent(object sender, WebBrowserDocumentCompletedEventArgs e)
{
WebBrowser webBrowser = sender as WebBrowser;
//To execute the event just one time
webBrowser.DocumentCompleted -= LoginEvent;
//load page's document
HtmlDocument doc = webBrowser.Document;
doc.GetElementById("u").SetAttribute("value", "admin");
doc.GetElementById("pw").SetAttribute("value", "123456");
foreach (HtmlElement elem in doc.GetElementsByTagName("a"))
{
elem.InvokeMember("click");
}
}
Can anyone help me please to figure why the page isn't showing?
1) Your WebBrowser object is a local variable in your MainWindow() constructor.
This object is being deposed once the MainWindow constructor ends.
You need to declare the WebBrowser object as a class member.
2) There might be a multiple DocumentComplete events being fired. You need to filter out all iFrame events and wait before the page being fully loaded:
private void LoginEvent(object sender, WebBrowserDocumentCompletedEventArgs e)
{
// filter out non main documents
if (e.Url.AbsolutePath != (sender as WebBrowser).Url.AbsolutePath)
return;
//To execute the event just one time
webBrowser.DocumentCompleted -= LoginEvent;
//load page's document
HtmlDocument doc = webBrowser.Document;
doc.GetElementById("u").SetAttribute("value", "admin");
doc.GetElementById("pw").SetAttribute("value", "123456");
foreach (HtmlElement elem in doc.GetElementsByTagName("a"))
{
elem.InvokeMember("click");
}
}
I am working for a screen scrapping application from windows application
I can automatically navigate through login page and all the pages using the we browser methods and sometimes having to use the '.Click' to trigger buttons on some of the pages.
Here's the problem. When I do the final 'click' to get my data, web browser opens up a new explorer window(pop up windows) that contains the another link button and I have to do click on this link button using c# to get my final data.
How can I access the new window(pop up window) to scrape it?
I am using below code and this code open the URL in new pop up window.
HtmlElement toollinkbutton = WebBrowser1.Document.Window.Document.Body.Document.GetElementsByTagName("a")[48];
toollinkbutton .InvokeMember("click");
The new window may be due to target="_blank" or javascript and using InvokeMember will result in the new window opening. Add a handler to the WebBrowser control NewWindow event and handle the click by calling Navigate() instead.
private string url = "";
public Form1()
{
InitializeComponent();
WebBrowser1.DocumentCompleted += new WebBrowserDocumentCompletedEventHandler(webBrowser1_DocumentCompleted);
WebBrowser1.NewWindow += new System.ComponentModel.CancelEventHandler(webBrowser1_NewWindow);
}
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
HtmlElementCollection links = WebBrowser1.Document.Links;
foreach (HtmlElement var in links)
{
var.AttachEventHandler("onclick", LinkClicked);
}
}
private void LinkClicked(object sender, EventArgs e)
{
HtmlElement link = WebBrowser1.Document.ActiveElement;
url = link.GetAttribute("href");
}
void webBrowser1_NewWindow(object sender, System.ComponentModel.CancelEventArgs e)
{
WebBrowser webBrowser = (WebBrowser)sender;
HtmlElement link = webBrowser.Document.ActiveElement;
Uri urlNavigated = new Uri(link.GetAttribute("href"));
WebBrowser1.Navigate(url);
e.Cancel = true;
}
Preamble
I'm using the WebBrowser control, which a user will interact with, so a solution will need to work with a visible WebBrowser control.
Question
How do I check if an element has an anchor as a child? All browsers are able to distinguish that an element contains an anchor (<a href=""...), and offers "open in new tab" functionality. That is what I am attempting to replicate. However, when I right click on a HtmlElement I'm only able to obtain the parent element.
Example
Taking the BBC website as an example, when I right click on the highlighted element (picture below), my output is DIV, but viewing the source code there is an anchor element as a child of this div.
SSCCE
using System;
using System.Diagnostics;
using System.Windows.Forms;
namespace BrowserLinkClick
{
public partial class Form1 : Form
{
private WebBrowser wb;
private bool firstLoad = true;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
wb = new WebBrowser();
wb.Dock = DockStyle.Fill;
Controls.Add(wb);
wb.Navigate("http://bbc.co.uk");
wb.DocumentCompleted += wb_DocumentCompleted;
}
private void Document_MouseDown(object sender, HtmlElementEventArgs e)
{
if (e.MouseButtonsPressed == MouseButtons.Right)
{
HtmlElement element = wb.Document.GetElementFromPoint(PointToClient(MousePosition));
//I assume I need to check if this element has child elements that contain a TagName "A"
if (element.TagName == "A")
Debug.WriteLine("Get link location, open in new tab.");
else
Debug.WriteLine(element.TagName);
}
}
private void wb_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (firstLoad)
{
wb.Document.MouseDown += new HtmlElementEventHandler(Document_MouseDown);
firstLoad = false;
}
}
}
}
Please test any proposed solution using the BBC website and the highlighted headline (the headline changes, but the DOM remains the same).
You have to get the child elements of element before checking if it's an anchor:
HtmlElement element = wb.Document.GetElementFromPoint(PointToClient(MousePosition));
foreach (HtmlElement child in element.Children)
{
if (child.TagName == "A")
Debug.WriteLine("Get link location, open in new tab.");
}
To access the needed properties you need to cast the HtmlElement to one of the unmanaged MSHTML interfaces, e.g. IHTMLAnchorElement
You have to add Microsoft HTML Object Library COM reference to your project.
(The file name is mshtml.tlb.)
foreach (HtmlElement child in element.Children)
{
if (String.Equals(child.TagName, "a", StringComparison.OrdinalIgnoreCase))
{
var anchorElement = (mshtml.IHTMLAnchorElement)child.DomElement;
Console.WriteLine("href: [{0}]", anchorElement.href);
}
}
There are plenty of such interfaces but MSDN will help you choose. :)
Scripting Object Interfaces (MSHTML)
I propose you the following solution:
url variable will have url of your desired output, you'll be able to see it in debugger window.
private void Document_MouseDown(object sender, HtmlElementEventArgs e)
{
if (e.MouseButtonsPressed == MouseButtons.Right)
{
HtmlElement element = wb.Document.GetElementFromPoint(PointToClient(MousePosition));
//I assume I need to check if this element has child elements that contain a TagName "A"
if (element.TagName == "A")
{
Debug.WriteLine("Get link location, open in new tab.");
var urlRaw = element.OuterHtml;
string hrefBegin = "href=";
var idxHref = urlRaw.IndexOf(hrefBegin) + hrefBegin.Length + 1;
var idxEnd = urlRaw.IndexOf("\"", idxHref + 1);
var url = urlRaw.Substring(idxHref, idxEnd - idxHref);
Debug.WriteLine(url);
}
else
Debug.WriteLine(element.TagName);
}
}
There has to be something else wrong with your program. On the BBC website your code works for the news articles (although I see the non UK version of the site). On other websites where there are anchor elements as children the code below works
private void Document_MouseDown(object sender, HtmlElementEventArgs e)
{
if (e.MouseButtonsPressed == MouseButtons.Right)
{
HtmlElement element = wb.Document.GetElementFromPoint(PointToClient(MousePosition));
if (element.Children.Count > 0)
{
foreach (HtmlElement child in element.Children)
{
if (child.TagName == "A")
Debug.WriteLine("Get link location, open in new tab.");
}
}
else
{
//I assume I need to check if this element has child elements that contain a TagName "A"
if (element.TagName == "A")
Debug.WriteLine("Get link location, open in new tab.");
else
Debug.WriteLine(element.TagName);
}
}
}
The challenge with bbc web site, that it have little bit non standard approach toward their url.
Below goes one of the samples of their a href:
<A tabIndex=-1 aria-hidden=true class=block-link__overlay-link href="http://www.bbc.com/news/world-africa-36132482" rev=hero5|overlay>Barbie challenges the 'white saviour complex' </A>
so, you need to use two parts in if:
1. element.TagName == "A"
2. check attribute href like this: element.GetAttribute("href")
Those two checks can give you guaranty that you deal with something with tag a, and that tag a has attribute href. See another example of usage:
private void Document_MouseDown(object sender, HtmlElementEventArgs e)
{
if (e.MouseButtonsPressed == MouseButtons.Right)
{
HtmlElement element = wb.Document.GetElementFromPoint(PointToClient(MousePosition));
//I assume I need to check if this element has child elements that contain a TagName "A"
if (element.TagName == "A" && !string.IsNullOrEmpty(element.GetAttribute("href")))//it means we have deal with href
{
Debug.WriteLine("Get link location, open in new tab.");
var url = element.GetAttribute("href");
Debug.WriteLine(url);
}
else
Debug.WriteLine(element.TagName);
}
}
I was asked by a friend to develop a winform app to be able to extract data. I figured it would be easy enough - how wrong I was!
In my winform, I have included a webbrowser control and some buttons. The URL for the webbrowser is http://www.racingpost.com/greyhounds/card.sd and as you can imagine, it is the place to get data for greyhounds. When on the page above, there are a number of links within this area which are specific to a race time. If you click on any of these, it takes you to that race, and its this data that I need to extract. So, my initial thoughts were to get ALL links off the link above, then store them in a list, then just have a button available to take in whatever link it is, and then take the webbrowser to that location. Once there, I can then look to extract the data and store it as needed.
So, in the first instance, I use
//url = link above
wb1.Url = new Uri(url);
grab the data (which are links for each race on that day)
once I have this, use a further button to go to the specific race
wb1.Url = new Uri("http://www.racingpost.com/greyhounds/card.sd#resultday=2015-01-17&raceid=1344640");
then, once there, click another button to capture the data, after which, return to the original link above.
The problem is, it will not go to the location present in the link. BUT, if I click the link manually within the webbrowser, it goes there no problem.
I have looked at the properties of the webbrowser, and these all look fine - although I can't qualify that tbh!
I know if I try to go to the links manually, I can, but if I try to do it through code, it just wont budge. I can only assume I have done something wrong in the code.
Hope some of that makes sense - first posting, so apologies if I made a mess of it. I will provide all code no problem, but cant seem to figure out how to post the code in 'code format'?
//here is the code
public partial class Form1 : Form
{
Uri _url;
public Form1()
{
InitializeComponent();
wb1.Url = new Uri("http://www.racingpost.com/greyhounds/card.sd");
wb1.Navigated +=new WebBrowserNavigatedEventHandler(wb1_Navigated);
}
classmodules.trackUrl tu;
private void btnGrabData_Click(object sender, EventArgs e)
{
classmodules.utility u = new classmodules.utility();
rtb1.Text = u.GetWebData("http://www.racingpost.com/greyhounds/card.sd");
HtmlDocument doc = wb1.Document;
string innerText = (((mshtml.HTMLDocument)(doc.DomDocument)).documentElement).outerHTML;
innerText = Regex.Replace(innerText, #"\r\n?|\n", "");
rtb1.Text = innerText;
tu = new classmodules.trackUrl();
u.splitOLs(ref tu, innerText);
classmodules.StaticUtils su = new classmodules.StaticUtils();
su.SerializeObject(tu, typeof(classmodules.trackUrl)).Save(#"d:\dogsUTL.xml");
classmodules.ExcelProcessor xl = new classmodules.ExcelProcessor();
xl.createExcel(tu);
}
private void wb1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
WebBrowser wb1 = sender as WebBrowser;
this.Text = wb1.Url.ToString();
}
void wb1_Navigated(object sender, WebBrowserNavigatedEventArgs e)
{
_url = e.Url;
}
private void btnGoBack_Click(object sender, EventArgs e)
{
goBack();
}
private void goBack()
{
wb1.Url = new Uri("http://www.racingpost.com/greyhounds/card.sd");
}
private void btnGetRaceData_Click(object sender, EventArgs e)
{
HtmlDocument doc = wb1.Document;
string innerText = (((mshtml.HTMLDocument)(doc.DomDocument)).documentElement).outerHTML;
rtb2.Text = innerText;
}
//###############################
//OK, here is the point where I want to take in the URL and click a button //to instruct the webbrowser to go to that location. I add an initial //counter to 0, and then get the first url from the list, increment the //counter, then when I click the button again, urlNo wil be 1, so then it //tries the second url
int urlNo = 0;
private void btnUseData_Click(object sender, EventArgs e)
{
if (tu.race.Count > urlNo)
{
string url = tu.race[urlNo].url;
wb1.Url = new Uri(url);
lblUrl.Text = url;
urlNo++;
}
else
{
lblUrl.Text = "No More";
}
}
Did you try the Navigate(...) method? In theory, the behavior of Navigate and Url is the same, but I can infer that they behave a bit different.
http://msdn.microsoft.com/en-us/library/system.windows.forms.webbrowser.navigate(v=vs.110).aspx
I'm having issues trying to get the document title from a WebBrowser in C#. It works fine in VB.NET, but it won't give me any properties in C#.
When I type in MyBrowser.Document., the only options I get are 4 methods: Equals, GetHashCode, GetType, and ToString - no properties.
I think it's because I have to assign the document to a new instance first, but I can't find the HTMLDocument class that exists in VB.NET.
Basically what I'm wanting to do is return the Document.Title each time the WebBrowser loads/reloads a page.
Can someone help please? It will be much appreciated!
Here is the code I have at the moment...
private void Link_Click(object sender, RoutedEventArgs e)
{
WebBrowser tempBrowser = new WebBrowser();
tempBrowser.HorizontalAlignment = HorizontalAlignment.Left;
tempBrowser.Margin = new Thickness(-4, -4, -4, -4);
tempBrowser.Name = "MyBrowser";
tempBrowser.VerticalAlignment = VerticalAlignment.Top;
tempBrowser.LoadCompleted += new System.Windows.Navigation.LoadCompletedEventHandler(tempBrowser_LoadCompleted);
tempTab.Content = tempBrowser; // this is just a TabControl that contains the WebBrowser
Uri tempURI = new Uri("http://www.google.com");
tempBrowser.Navigate(tempURI);
}
private void tempBrowser_LoadCompleted(object sender, EventArgs e)
{
if (sender is WebBrowser)
{
MessageBox.Show("Test");
currentBrowser = (WebBrowser)sender;
System.Windows.Forms.HtmlDocument tempDoc = (System.Windows.Forms.HtmlDocument)currentBrowser.Document;
MessageBox.Show(tempDoc.Title);
}
}
This code doesn't give me any errors, but I never see the second MessageBox. I do see the first one though (the "Test" message), so the program is getting to that code block.
Add reference to Microsoft.mshtml
Add event receiver for LoadCompleted
webbrowser.LoadCompleted += new LoadCompletedEventHandler(webbrowser_LoadCompleted);
Then you will have no problems with document not being loaded in order to read values back out
void webbrowser_LoadCompleted(object sender, NavigationEventArgs e)
{
// Get the document title and display it
if (webbrowser.Document != null)
{
mshtml.IHTMLDocument2 doc = webbrowser.Document as mshtml.IHTMLDocument2;
Informative.Text = doc.title;
}
}
You are not using the Windows Forms WebBrowser control. I think you got the COM wrapper for ieframe.dll, its name is AxWebBrowser. Verify that by opening the References node in the Solution Explorer window. If you see AxSHDocVw then you got the wrong control. It is pretty unfriendly, it just gives you an opaque interface pointer for the Document property. You'll indeed only get the default object class members.
Look in the toolbox. Pick WebBrowser instead of "Microsoft Web Browser".
string title = ((HTMLDocument)MyBrowser.Document).Title
Or
HTMLDocument Doc = (HTMLDocument)MyBrowser.Document.Title ;
string title = doc.Title;
LoadCompleted doesn't fire. You should use Navigated event handler instead of it.
webBrowser.Navigated += new NavigatedEventHandler(WebBrowser_Navigated);
(...)
private void WebBrowser_Navigated(object sender, NavigationEventArgs e)
{
HTMLDocument doc = ((WebBrowser)sender).Document as HTMLDocument;
foreach (IHTMLElement elem in doc.all)
{
(...)
}
// you may have to dispose WebBrowser object on exit
}
Finally works well with:
using System.Windows.Forms;
...
WebBrowser CtrlWebBrowser = new WebBrowser();
...
CtrlWebBrowser.Document.Title = "Hello World";
MessageBox.Show( CtrlWebBrowser.Document.Title );