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Winform webbrowser automation is not clicking Button

I'm trying to automate a winforms webbrowser control to fill formulars on external webpages. While testing with the google-page i can't click the searchbutton.
I'm not getting an Error, it just does nothing. I've also checked if the HTMLElement is found.
I think i'm completely blind, so here is my code.
Can u tell me what i'm doing wrong?
currentPage currentPageV;
enum currentPage
{
GoogleSearch,
SearchResults
}
public Form1()
{
InitializeComponent();
webBrowser1.Navigate("www.google.de");
currentPageV = currentPage.GoogleSearch;
}
private void WebBrowser1_DocumentCompleted(object sender,
WebBrowserDocumentCompletedEventArgs e)
{
if (currentPage.GoogleSearch == currentPageV)
{
currentPageV = currentPage.SearchResults;
webBrowser1.Document.GetElementsByTagName("input").GetElementsByName("q")[0].SetAttribute("value", "Some Text");
webBrowser1.Document.GetElementsByTagName("input").GetElementsByName("btnK")[0].InvokeMember("click");
}
}

web browser submit button not invoking second time c#

Am trying to submit a webform pragmatically on button1 click. In first attemp ie after launching my webbrowser from visual studio it automatically submit the form but again clicking on button1, webpage loads but submit button is not invoked. While debugging its shows that the line of code executed but no action takes place.
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("xxxx");
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
}
void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
if (webBrowser1.Url.OriginalString.ToString() == "xxxx")
{
if(webBrowser1.ReadyState==WebBrowserReadyState.Complete)
{
HtmlElementCollection doc = webBrowser1.Document.All;
foreach (HtmlElement ele in doc)
{
if (ele.GetAttribute("name").ToString()== "username")
{
ele.SetAttribute("value","xxxx");
}
if (ele.GetAttribute("name").ToString() == "password")
{
ele.SetAttribute("value", "xxxx");
}
if (ele.GetAttribute("classname") == "btn")
{
ele.InvokeMember("click");
}
}
}
}
textBox1.Text = webBrowser1.DocumentText;
}

You only want to setup the DocumentCompleted event for the web browser once. In your code you keep adding to the event chain each time the button is pressed which is not the behaviour you want.
You want something like (pseudo code as haven't got VS with me):
// When the form/parent loads bind the event ONCE here.
public void FormLoads()
{
webBrowser1.DocumentCompleted += webBrowser1_DocumentCompleted;
}
// Just navigate here and the event will still be raised
private void button1_Click(object sender, EventArgs e)
{
webBrowser1.Navigate("xxxx");
}

Its Due to your webBrowser1_DocumentCompleted Event is not working when your click on Button.
Just Create one method
Private Void Submit(); and here put your code which you want to perform on click event and call this method from two location one is at button1_click and another webBrowser1_DocumentCompleted so that your code is run at both events.

Use url drop of WebBrowser control in C#

I would like to use the drop functionality of the WebBrowser control in C#. Unfortunately it doesn't work although I set the AllowWebBrowserDrop property to true.
For testing I wrote this little programm with just a textbox and a webbrowser control:
public Form1()
{
InitializeComponent();
webBrowser1.AllowWebBrowserDrop = true;
textBox1.Text = "http://www.google.com";
}
private void textBox1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
DoDragDrop(textBox1.Text, DragDropEffects.Link);
}
private void webBrowser1_Navigating(object sender, WebBrowserNavigatingEventArgs e)
{
MessageBox.Show(e.Url.AbsoluteUri);
}
The DoDragDrop method gets executed correctly, but I never see the MessageBox appearing when dropping the string from the TextBox over the WebControl. Since the WebControl doesn't offer the usual drag & drop events I'm lost.
What do I have to do to make the url drop to the WebBrowser control work?

Use the following approach to initiate FileDrop dragging:
DataObject dObj = new DataObject();
var paths = new System.Collections.Specialized.StringCollection();
paths.Add(textBox1.Text);
dObj.SetFileDropList(paths);
textBox1.DoDragDrop(dObj, DragDropEffects.Link);

How do you click a button in a webbrowser control?

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.

C# Web Browser with click and highlight

Before I go off and code this, I thought I'd see if anyone here knows of any open source (or paid for) equivalents already built.
I'm looking for a browser control where users can preview a web page and then highlight elements of it and once highlighted, I can get the div or id of the element selected.
Has anyone seen such a thing?

Here's a crude version using the .NET WebBrowser control, which uses Internet Explorer.
namespace WindowsFormsApplication1
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Windows.Forms;
public partial class Form1 : System.Windows.Forms.Form
{
private HtmlDocument document;
private IDictionary<HtmlElement, string> elementStyles = new Dictionary<HtmlElement, string>();
public Form1()
{
InitializeComponent();
}
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
this.Text = e.Url.ToString();
this.document = this.webBrowser1.Document;
this.document.MouseOver += new HtmlElementEventHandler(document_MouseOver);
this.document.MouseLeave += new HtmlElementEventHandler(document_MouseLeave);
}
private void document_MouseLeave(object sender, HtmlElementEventArgs e)
{
HtmlElement element = e.FromElement;
if (this.elementStyles.ContainsKey(element))
{
string style = this.elementStyles[element];
this.elementStyles.Remove(element);
element.Style = style;
}
}
private void document_MouseOver(object sender, HtmlElementEventArgs e)
{
HtmlElement element = e.ToElement;
if (!this.elementStyles.ContainsKey(element))
{
string style = element.Style;
this.elementStyles.Add(element, style);
element.Style = style + "; background-color: #ffc;";
this.Text = element.Id ?? "(no id)";
}
}
}
}

I had a similar need and the code originally posted was a tremendous help. I would like to return the kindness of the original author.
The answer provided is insufficient. It only answers the first part of the request: highlighting the rendered HTML. It does not solve the second half of the request where the C# program can tell which node is selected.
As the mouse enters the form and moves towards the desired rendered area, the highlight will follow the mouse. This means that potentially many HTML elements will be visited by the mouse.
So how can the C# tell which element the user wants?
The program has to allow the user to click on the desired rendered area. The click should be trapped by the C# program. In addition, the C# should disable the click being delivered to the element (for example, if its an Anchor element you don't want the click to follow the link).
I solved this in my program as follows:
(1) On the 'document complete' event I added a trap (only once for the document) for the click event at the document level:
HtmlDocument htmlDoc = webBrowser.Document;
_document = webBrowser.Document;
//-- add our handler only once
if (!_documentHandlers.Contains(_document))
{
_document.MouseOver += new HtmlElementEventHandler(document_MouseOver);
_document.MouseLeave += new HtmlElementEventHandler(document_MouseLeave);
mshtml.HTMLDocumentEvents2_Event iEvent;
IHTMLDocument2 currentDoc = (IHTMLDocument2) webBrowser.Document.DomDocument;
iEvent = (mshtml.HTMLDocumentEvents2_Event) currentDoc;
iEvent.onclick += new mshtml.HTMLDocumentEvents2_onclickEventHandler(clickDocumentHandler);
_documentHandlers.Add(_document);
}
The 'document completed' event can be triggered several times for the same document (try CNN.com). The '_documentHandlers' variable is a HashSet to make sure we only add the handler one time per a given document.
(2) I also chose to trap the click at the element level. On the 'mouse over' I added:
mshtml.HTMLElementEvents2_Event iEvent;
iEvent = element.DomElement as mshtml.HTMLElementEvents2_Event;
if (iEvent == null)
return;
iEvent.onclick += new mshtml.HTMLElementEvents2_onclickEventHandler(clickElementHandler);
and at the 'mouse leave' I unregistered the click handler:
mshtml.HTMLElementEvents2_Event iEvent;
iEvent = element.DomElement as mshtml.HTMLElementEvents2_Event;
if (iEvent == null)
return;
iEvent.onclick -= new mshtml.HTMLElementEvents2_onclickEventHandler(clickElementHandler);
(3) the click handlers are simple:
private bool clickDocumentHandler(IHTMLEventObj pEvtObj)
{
IHTMLElement element = (mshtml.IHTMLElement)pEvtObj.srcElement;
pEvtObj.cancelBubble = true;
pEvtObj.returnValue = false;
return false;
}
private bool clickElementHandler(IHTMLEventObj pEvtObj)
{
IHTMLElement element = (mshtml.IHTMLElement)pEvtObj.srcElement;
pEvtObj.cancelBubble = true;
pEvtObj.returnValue = false;
return false;
}
Note that they cancel the bubbling of event and return a value of 'false' to prevent the click from percolating upwards.
In these handlers you can add your specific code to save the element being clicked and then use it elsewhere in your application.
Note that at the element level, not every IHTMLElement supports an onclick handler hence the check for null.
-Enjoy
David