C# Auto click button and auto fill form

Posted on February 17, 2010 by Farooq Azam

This tutorial will show you how to auto fill forms and click buttons in a website using the webBrowser control. When you learn to do this you can make your own web bots!

To show you how autoclick/autofill works we’ll make a simple Google AutoSearch Bot.

So lets begin…

First of all, add a webBrowser control to your form. Set its “Url” property to “www.google.com”.

Now we’ll add two methods SetText() and ClickButton(). SetText() method will automatically fill a textBox and the ClickButton() will click the submit button.

Since we are making a Google AutoSearch Bot we need to find what’s the name of the Google search textBox and the submit button. To find these, visit Google.com from your browser and view the page source.

Here’s the code for the SetText() method:

// Set value for the attribute that has the name (attName)

void SetText(string attribute, string attName, string value)
 {

 // Get a collection of all the tags with name "input";

 HtmlElementCollection tagsCollection = webBrowser1.Document.GetElementsByTagName("input");

 foreach (HtmlElement currentTag in tagsCollection)
 {

 // If the attribute of the current tag has the name attName

   if (currentTag.GetAttribute(attribute).Equals(attName))

 // Then set its attribute "value".

   currentTag.SetAttribute("value", value);
 }
}

And now the code for the ClickButton() method:

// Click the button whose attribute has a name "attName"

 void ClickButton(string attribute, string attName)
 {
    HtmlElementCollection col = webBrowser1.Document.GetElementsByTagName("input");

    foreach (HtmlElement element in col)
    {
      if (element.GetAttribute(attribute).Equals(attName))
      {

      // Invoke the "Click" member of the button
      element.InvokeMember("click");
      }
    }
 }

Now that the main methods are added we can now tell the bot what to do .

Declare “bool searched = false” at Class-level (i.e add it above pulic Form1() {……). We’ll use it to check whether we have already searched or not.

Add DoucmentComplete event for the webBrowser. DocumentComplete event is fired when the page is loaded completely.

Use this code:

Note: The name of the Google search textBox is “q” and the submit buttons is “btnG”.

private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
 {

 // Check if already searched

 if(searched == false)
 {

 // Set the text to "Search Text Here" of the textBox whose "name" attribute is "q";

 SetText("name", "q", "Search Text Here");

 // Click the button whose name attribute is "btnG"

 ClickButton("name", "btnG");

 // Since we have already searched, set it to true

 searched = true;

 }
 }

That’s it! Debug the project and watch the bot

If you have any questions don’t hesitate to post a comment.

Thanks

57 thoughts on “C# Auto click button and auto fill form”

PyrogenicMedia on March 10, 2010 at 3:07 AM said:

Awesome. The set value doesnt work for combo-boxes. Which is a bit of a pain since if you did this via javascript, it’s just setting the value for it.

But these ways are much faster/easier then developing using the mshtml library.

Reply ↓
Nail on March 13, 2010 at 2:38 PM said:

Hi,

I am working on a simple application to sign in and submit information to some of the websites. I have a web browser, listbox and textboxes on the form. I have a list of URLs in the listbox and username, password in the textboxes. When I click any item on the listbox, web browser opens that webpage.

Now, I need to fill the related login information and submit. I am having difficulty on this, can you suggest me anything?

Reply ↓
Cnn on March 22, 2010 at 10:18 PM said:

Thank you very much…

Reply ↓
Kaido on April 2, 2010 at 4:06 PM said:

Thx dude. Im good with php just taking next step to learn c#.
Anyway your explanation is easy to follow and clear keep it up

Reply ↓
Farooq Azam on April 8, 2010 at 6:23 PM said:

@Nail: What problem are you facing?

Reply ↓
Garrison on May 18, 2010 at 12:56 AM said:

C# is giving me errors on all the &quot how do i solve this?

Reply ↓
- Farooq Azam on May 18, 2010 at 1:34 AM said:
  
  Oh sorry! That’s was a mistake in the post. I’ve fixed it now. The code is working perfectly now.
  
  Reply ↓
Furio on May 18, 2010 at 4:59 PM said:

Great job bro,

But you should fix the quotes at the bottom , for example: ClickButton(“name’, ‘btnG”);

Have them be double qoutes , i struggled with this for a full hour as it wont compile with single ones and it throws some crazy errors in.

Everything is working like a charm and your tutotorial is the best!

Kind Regards,
Furio

Reply ↓
Farooq Azam on May 18, 2010 at 9:23 PM said:

Thanks Furio. I’ve edited the post.

Reply ↓
John Rambold on June 10, 2010 at 3:55 PM said:

Doing alot in PHP, but this doesn’t look much different. I think I should give c# a try…can’t be too difficult.

Reply ↓
- Farooq Azam on June 10, 2010 at 5:46 PM said:
  
  If you are good with Php then you’ll find C#’s syntax much similar.
  
  Reply ↓
GAM3R on June 17, 2010 at 12:40 AM said:

Hello, for the code, I tried to modify it to work on my website, but it didnt work, and suggestions?

Reply ↓
GAM3R on June 18, 2010 at 3:40 AM said:
I got it to work, Now. How would I click a span that has a specific text

Like:
```
<span class="yt-uix-button-content">Like</span>
```
Reply ↓
Farooq Azam on June 18, 2010 at 3:32 PM said:

You can use this method to click a span:

// The Method:

void ClickSpan(string attribute, string attName)
{
HtmlElementCollection col = webBrowser1.Document.GetElementsByTagName(“span”);

foreach (HtmlElement element in col)
{
if (element.GetAttribute(attribute).Equals(attName))
{
element.InvokeMember(“click”);
}
}
}

// Example use:

ClickSpan(“class”, “yt-uix-button-content”);

Thanks

Reply ↓
Parham on July 6, 2010 at 3:35 PM said:

HELP FOR READING ELEMENTS IN THE AJAX PANEL?!

Hi
thanks, its very use full for me

i have a web application that using ajax panel
i use this method to login the web app.
and going to my goal page, fill the related controls
and finally click the SUBMIT button

after submit, web app. get data from DB and show in the page
IN THE AJAX PANEL

and when i want to read the element that filled after submit, the element is EMPTY!!!
and when i watching it in VIEW SOURCE with browser it also empty BUT it is showing in the monitor???!!!!!!!

please help me
thanks

Reply ↓
Parham on July 6, 2010 at 3:56 PM said:

correction

I using UPDATEPANEL of microsoft Ajax with C# for previous comment

thanks again

Reply ↓
- Farooq Azam on July 6, 2010 at 7:40 PM said:
  
  Can you post your code, please?
  
  Reply ↓
Parham on July 7, 2010 at 10:45 AM said:

Web App. Code sample

.
.Some controls
. Search BUTTON and TEXT BOX
.

.
.

.
.

I can navigate to this page and fill the search textbox and click the search button with the your sample code (its work fine)
but after that when web app. fill the Label(“APT_NAME”), webBrowser1_DocumentCompleted does not raise
and when I see VIEW SOURCE i found my label here

offcourse i raise it manualy after my search Button clicked

but element value is empty

i try AxWebBrowser and its the same!
is that possible to catch o access elements values where updates with ajax?
thanks

Reply ↓
Parham on July 7, 2010 at 10:50 AM said:

corrected HTML tags ( * for & g t and & l t and \ as slashs)
Web App. Code sample

*asp:ScriptManager ID=”ScriptManager1″ runat=”server”*
*\asp:ScriptManager*
*table width=”100%”*
*tr*
*td align=”center”*
*asp:UpdatePanel ID=”UpdatePanel1″ runat=”server”*
*ContentTemplate*
*table width=”100%”*
.
.Some controls
. Search BUTTON and TEXT BOX
.
*tr
*td
*asp:Label ID=”APT_NAME” runat=”server”* *\asp:Label*
*\td
*\tr
.
.
*\table*
*\ContentTemplate*
*\asp:UpdatePanel*
.
.

I can navigate to this page and fill the search textbox and click the search button with the your sample code (its work fine)
but after that when web app. fill the Label(“APT_NAME”), webBrowser1_DocumentCompleted does not raise
and when I see VIEW SOURCE i found my label here

*td style=”width: 25%; height: 14px;” align=”right”*
*span id=”ctl00_ContentPlaceHolder1_MobileFileInfo2_APT_NAME”* *\span*
*\td*

offcourse i raise it manualy after my search Button clicked

but element value is empty

i try AxWebBrowser and its the same!
is that possible to catch o access elements values where updates with ajax?
thanks

Reply ↓
Sharaf Ali on July 31, 2010 at 3:06 PM said:

I am developing AutoWebFormFiller using C#, I have completed it almost but unable to auto fill input file field. I want image file found in my local D Drive to be auto selected in input file field.

Reply ↓
Smita on August 5, 2010 at 2:51 PM said:

what about <a>

I tried

element.InvokeMember(“href”);

Does not work.

Reply ↓
- Farooq Azam on August 5, 2010 at 4:38 PM said:
  
  You should use “element.GetAttribute(“href”);”.
  
  Reply ↓
Yasir Godil on August 27, 2010 at 5:09 PM said:

How can I fill combo box using this code? or is there any other code that I can use to fill combo box ?

Reply ↓
Yasir Godil on August 27, 2010 at 5:15 PM said:

Ok.

I got this work. Wrote a new function to fill values in Combo boxes and works like a charm. Thanks dude

Here is the code

public void SetComboText(string attribute, string attName, string value)
{
// Get a collection of all the tags with name “input”;
HtmlElementCollection tagsCollection = webBrowser.Document.GetElementsByTagName(“select”);

foreach (HtmlElement currentTag in tagsCollection)
{
// If the attribute of the current tag has the name attName
if (currentTag.GetAttribute(attribute).Equals(attName))
// Then set its attribute “value”.
currentTag.SetAttribute(“value”, value);
}
}

Reply ↓
satish on October 4, 2010 at 10:11 PM said:

how to click the add favorites button in youtube automatically

i need urgent ,help me out

Reply ↓
AlexMoscow on October 26, 2010 at 12:19 AM said:

Thank you!

Reply ↓
Adrienne @ Sharp Depot on November 4, 2010 at 7:09 AM said:

Hello there, just stopped by doing some research for my Sharp site. Lots of information out there. Not quite what I was looking for, but very nice site. Have a nice day.

Reply ↓
sagar on November 16, 2010 at 3:16 PM said:

Error:- Object reference not set to an instance of an object

for the following line in the code

HtmlElementCollection tagsCollection = webBrowser1.Document.GetElementsByTagName(“input”);

Reply ↓
- Farooq Azam on November 16, 2010 at 3:35 PM said:
  
  The element that you are looking for might not exist. Confirm that its not null before using it:
  
  // 0 is the object index. It can be anything.
  if (tagsCollection[0] != null)
  {
  // do something
  }
  
  Reply ↓
sagar on November 16, 2010 at 5:30 PM said:

how to do it for frames in aspx page , i have a frame and i have dynamic links in my frame, and i wan to click those links

Reply ↓
sagar on November 17, 2010 at 2:01 PM said:

Log In

this is my button click script , how can i do button click

Reply ↓
Sara on November 26, 2010 at 10:09 AM said:

Hi farooq,
Im using asp.net c#. I have one drop-down list which is internship type and another is a text box which is country. Example I select local under the internship type from the drop down list, the textbox which is the country should be automatically state singapore. When I select overseas under the internship type from the drop down list, the text box should be automatically state other country which is not singapore. How can I do it?? Any help will be highly appreciated.

Thank you,
Sara

Reply ↓
ianemv on December 26, 2010 at 6:45 PM said:

Is it possible to use the code generated by web test with webbrowser object?

Reply ↓
Yasir Godil on January 4, 2011 at 12:29 PM said:

Hey guys,

I am unable to click textboxes available on yahoo new account creationg form.

I want to click the firstname, lastname etc textbox on yahoo’s new account creation page but when I click a textbox, code doesn’t pick that textbox rather it picks some division. Could you please try

URL:
http://bit.ly/u3eXM1

Remember, I want to click the textbox not the button

Reply ↓
me on February 4, 2011 at 4:20 AM said:

hi

What about if you have X sites…

Site 1: fill in click go to Site 2
Site 2: click on site3..
Site 3: click on finished

how do you know when site 2/site 3 is loaded? (i have page that load’s 3 times WebBrowserDocumentCompletedEventArgs :S .. i think it’s ajax)

gr.

Reply ↓
Andy on February 5, 2011 at 9:52 PM said:

Able to use/adapt for a variety of web sites (google, yahoo, etc.). Extremely useful..thanks.

Am stumped as to why code does not find TagName “input” in html snippet below. As a result, I’m unable to autofill username. Thanks for any assist.

Domain\user name:

Reply ↓
Andy on February 7, 2011 at 8:09 PM said:

Thanks for excellent post. Could you address how to obtain input ids for OWA (outlook web access). It seems that getelementsbytagname does not work…returns count=0 tagnames found (see snippet below).

Reply ↓
Sandeep on February 11, 2011 at 1:52 PM said:

please help me with filling date text box and then clicking the excel button at
http://www.nasdaqomxcommodities.com/trading/marketprices/history/

Reply ↓
Jazerix on May 17, 2011 at 3:10 PM said:

Hey

First of all, this tutorial is so awesome, worked like a charm, the only thing i got a problem with now, is comboboxes, do u think u could give me an example

nevertheless, good job and that u so much

Reply ↓
Kase on May 24, 2011 at 2:54 PM said:

Plz help me Fill in ID 1589ed7d370641d8b71e619a222013dac and 107750810ce2cd3b0744f5d08fffbe248. Thanks you!

Username

Password

Reply ↓
Kase on May 24, 2011 at 2:56 PM said:

sorry
it like:
User-
name

Password

Reply ↓
Kase on May 24, 2011 at 9:32 PM said:

Sorry again! I do’nt know why my post was not full.
how can I click this image ?

img style=”cursor: pointer;” src=”/images.jpg” onclick=’this.src=”/captcha.jpg”;>Username

and fill in ID?
<div class="form_value
input class="form_input" onfocus="osk_field=this;" name="1bcec52c08c411fddbce9bee639c8e933" id="1bcec52c08c411fddbce9bee639c8e933" value="" type="text

Thanks you to answer!

Reply ↓
dev92 on June 8, 2011 at 2:56 PM said:

Hi,

I’m trying to use this code, I’m really happy to have found it but I’m facing some issues.

I can’t use this code because of my System.Windows.Forms.dll
I’ve already add the reference but into my System.windows.forms.dll it seems there is no definition for GetEllementByTagName(“”); What can i Do?

I hope you will answer. and I Hope this answer will help me.

Thanks a lot

Reply ↓
Alexia on June 9, 2011 at 10:45 PM said:

I’ m glad to meet this kind of source code because I needed it, But I’ve issues which might seems to be stupid but my Visual studio is telling me that I need a using reférence which is the réference to System.Windows.Forms so I gave him the .dll file but He is telling me that There is no definitions for this method
GetElementsByTagName(“input”);

I hope you will be able to help me, Waiting for an answer .

Bye

Reply ↓
Puran on July 1, 2011 at 6:46 PM said:

Thanks for sharing..this works like charms…

Can we make this genric type…lets say.two sites having different naming convention for input box..

E.g. on yahoo..input field name is txtname while on gmail it is textname /name…how can we do generic kind of site input box filling..(e.g. Roboform utility)…

Thanks
Bye

Reply ↓
Puran on July 6, 2011 at 7:05 PM said:

Hi, Thanks for sharing this.

Normally on different sites, Tagvalue / Name /Id can vary.

E.g. in site X, field name could be txt_name and on site Y it could be reg_name. Any Idea, how we can write generic code based on the label / Description instead of Tag names.

Thanks

Reply ↓
Hitesh Bhagiya on July 9, 2011 at 1:48 PM said:

Thanks Brother for sharing this.

Reply ↓
iCamasHD on August 2, 2011 at 2:24 PM said:

Thanks for this!
It has helped me a lot and given me new ideas.

Reply ↓
Elias on August 8, 2011 at 6:50 PM said:

Hi
this is a great post, but i’d like to know how to do it in php (i’m kind of newbie in PHP) can you show me please?

thanks

Reply ↓
Ajam on August 14, 2011 at 4:21 AM said:

Thank you Sir. It is remarkable.

Reply ↓
prince on August 26, 2011 at 5:16 PM said:

thanks,
is there a way to click a button which has no name?
I have tried many things but failed,
ex:
webBrowser1.Document.GetElementById(“button”).InvokeMember(“click”);

The buttons Probs from the Site is:
class = ui-button ui-widget ui-state-default ui-corner-all ui-button-text-only ui-state-hover ui-state-focus

role = button

aria-disabled = false

Position:
Links: 1010px Oben: 283px
Breite: 81px Höhe: 24px

Other:
Schriftart: Verdana,Arial,sans-serif
Schriftgröße: 11px

Parrentelemente:

html

body

div #wrap

div #content-middle

form

table

tbody

tr

td

Childlemente

span .ui-button-text

Please help me

Reply ↓
Pavan on August 29, 2011 at 11:05 AM said:

hi how to change or write code in click event of google’s textbox using c#??

Reply ↓
sesso webcam on September 10, 2011 at 4:24 PM said:

Great and usefull bot. Thanks a lot

Reply ↓
Shawn on September 29, 2011 at 6:43 AM said:

Thanks! But could you also show how to fill in forms that have comboboxes, radiobuttons, checkboxes? Also, if a form opens a new window and I would like to fill in that too, how do I navigate to that new window? Do I also use the Url property of webBrowser control?

Reply ↓
jatin on November 8, 2011 at 12:16 PM said:

i dont understand plz tell me in code snippet with diagram;

Reply ↓
Troy on November 16, 2011 at 8:50 PM said:

Unfortunately all attempts to use this code seem to be a bust for me. I have updated my code as the button is now listed as btnK, but ultimately nothing fills, and nothing searches.

Reply ↓
Troy on November 16, 2011 at 8:52 PM said:

My code can be examined here: http://pastebin.com/JZAudg9Q

Again, it does not work for myself.

Reply ↓

Farooq Azam

Unity 3D, Game Development and C# Programming.

C# Auto click button and auto fill form

57 thoughts on “C# Auto click button and auto fill form”

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