After completing the loading of windows form how can I click a button automatically.

Question

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Please see the following code:

C#

private void Form1_Load(object sender, EventArgs e)
        {

            geckoWebBrowser1.DocumentCompleted += new EventHandler(geckoWebBrowser1_DocumentCompleted);

            geckoWebBrowser1.Navigate(url);

        }

private void PDF_Click(object sender, EventArgs e)
        {
           
            var item1 = geckoWebBrowser1.Document.GetElementById("DynamicGrid");

                htmlelem = item1.InnerHtml;
        }

I want to call the event PDF_Click automatically after completing the Form1_Load event.

Is it possible ?

Then please give me a suggestion.

Posted 12-Dec-14 1:23am

sachi Dash

Updated 12-Dec-14 1:56am

v2

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Sanket Saxena 12-Dec-14 7:47am

Why calling click event just call GetDOM() on your page load.

Richard Deeming 12-Dec-14 8:26am

This is essentially the same question you asked yesterday:
http://www.codeproject.com/Questions/852416/How-can-I-nevigate-an-url-through-GeckoWebBrowser[^]

7 solutions

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Marcin Kozub · Answer 1 · 2014-12-12T01:42:00

Hi,

Why you're trying to simulate button click event if only function it is doing is to call GetDOM() method? Isn't simpler to call that method directly from Form's Load event? Try this:

C#

private void Form1_Load(object sender, EventArgs e)
{
    geckoWebBrowser1.DocumentCompleted += new EventHandler(geckoWebBrowser1_DocumentCompleted);
    geckoWebBrowser1.Navigate(url);

    GetDOM(); // <-- this should be enough
}

[Update]
I think that I understand now what you're trying to do. I assume that you want to call PDF_Click after DOCUMENT WERE LOADED. Am I right?
In this case you should call PDF_Click or whatever method you want inside this method:

C#

geckoWebBrowser1_DocumentCompleted(object sender, EventArgs e)

Form_Load event is executed after form is created and initialized, but befeore it is Shown on screen. In that method you're assigning DocumentCompleted event handler to geckoWebBrowser component. So if you want to process loaded document, i.e. print it or save it or else, you should do that actions after DocumentWas loaded.
Let me know if I'm right?

Cheers!

DamithSL · Answer 2 · 2014-12-12T02:17:00

C#

private void Form1_Load(object sender, EventArgs e)
        {

            geckoWebBrowser1.DocumentCompleted += new EventHandler(geckoWebBrowser1_DocumentCompleted);

            geckoWebBrowser1.Navigate(url);

        }

private void PDF_Click(object sender, EventArgs e)
        {

             ProcessPDF();
        }

private void ProcessPDF()
        {
                var item1 = geckoWebBrowser1.Document.GetElementById("DynamicGrid");

                htmlelem = item1.InnerHtml;
        }
public void geckoWebBrowser1_DocumentCompleted(object sender, EventArgs e)
        {
              // web browser document loading completed, now you can generate the pdf
              ProcessPDF();
        }

Mr. Mahesh Patel · Answer 3 · 2014-12-12T01:29:00

Solution 1

Simply add below line in end of page load event

C#

PDF_Click(new object(),new EventArgs());

Posted 12-Dec-14 1:29am

Mr. Mahesh Patel

Comments

sachi Dash 12-Dec-14 7:31am

Where I need to put this code ? Please keep in mind at first need to load windows form then PDF_Click will occurred.

Mr. Mahesh Patel 12-Dec-14 7:42am

private void Form1_Load(object sender, EventArgs e)
{

geckoWebBrowser1.DocumentCompleted += new EventHandler(geckoWebBrowser1_DocumentCompleted);

geckoWebBrowser1.Navigate(url);
PDF_Click(new object(),new EventArgs());
}

sachi Dash 12-Dec-14 8:00am

No It is wrong ! When I call PDF_Click(new object(),new EventArgs()), in that time windows form loading is not completed. I have improved my code. See the question agein.

Mr. Mahesh Patel 12-Dec-14 8:03am

you can call button click from java script in "Unload" event of form.
This will occurs after load complete.

See my second answer.

Sanket Saxena · Answer 4 · 2014-12-12T02:07:00

Solution 4

Simply you need to take the advantage of Form1_Shown event which will fired just after the form load:

C#

private void Form1_Load(object sender, EventArgs e)
       {
           // Call the Click event of PDF button.
           PDF.PerformClick();
       }

private void Form1_Shown(object sender, EventArgs e)
       {
          var item1 = geckoWebBrowser1.Document.GetElementById("DynamicGrid");

          htmlelem = item1.InnerHtml;
       }

Hope it helps :)

Posted 12-Dec-14 2:07am

Sanket Saxena

Updated 12-Dec-14 2:25am

v3

Comments

sachi Dash 12-Dec-14 8:13am

No it doesn't work. Please keep in mind at first need to load windows form then PDF_Click will occurred. When you are putting PDF.PerformClick(), this time windows form loading doesn't completed.

Sanket Saxena 12-Dec-14 8:26am

Check my updated solution and use Form1_Shown event

sachi Dash 12-Dec-14 9:13am

Actually I have used firstly Form_shown and was worked for default WebBrowser but it is not worked for geckoWebBrowser.

Mr. Mahesh Patel · Answer 5 · 2014-12-12T02:11:00

C#

private void Form1_Load(object sender, EventArgs e)
        {
             geckoWebBrowser1.DocumentCompleted += new EventHandler(geckoWebBrowser1_DocumentCompleted);
 
            geckoWebBrowser1.Navigate(url);
 Thread t = new Thread(new ThreadStart()=>{
PDF_Click(new object(), new EventArgs())
});
t.Start();
        }
 
private void PDF_Click(object sender, EventArgs e)
        {
           
            var item1 = geckoWebBrowser1.Document.GetElementById("DynamicGrid");
 
                htmlelem = item1.InnerHtml;
        }

Mr. Mahesh Patel · Answer 6 · 2014-12-12T02:29:00

Solution 7

C#

private void geckoWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) {

while(e.Url != geckoWebBrowser1.Url)
{
Application.DoEvent();
Application.DoEvent();
Application.DoEvent();
}
PDF_Click(new object(), new EventArgs());
}

Posted 12-Dec-14 2:29am

Mr. Mahesh Patel

Mr. Mahesh Patel · Answer 7 · 2014-12-12T02:06:00

Solution 3

JavaScript

<script type="text/javascript">
     function fncsave()
     {
        document.getElementById('<%= PDF_Click.ClientID %>').click();
     }

     windows.onunload = fncsave;
</script>

HTML

But remember that this will be infinite loop if you are not handling properly this function

Posted 12-Dec-14 2:06am

Mr. Mahesh Patel

Updated 12-Dec-14 2:08am

v2

Comments

Sanket Saxena 12-Dec-14 8:08am

Mahesh OP is talking about Windows Form not Web Form :)

Mr. Mahesh Patel 12-Dec-14 8:09am

They can use thread. Please see my next answer for windows.
By the way the word "InnerHTML" mentioned in question is used in web.

sachi Dash 12-Dec-14 8:16am

@Mr. Mahesh Patel .... I am not using web. I am using geckoWebBrowser.

Mr. Mahesh Patel 12-Dec-14 8:25am

See Solution Number 5 if it is helpful to you.
If not then try to found your geckoWebBrowser's url load complete event and call your button click event in it.

private void geckoWebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) {

while(e.Url != geckoWebBrowser1.Url)
{
Application.DoEvent();
Application.DoEvent();
Application.DoEvent();
}
PDF_Click(new object(), new EventArgs());
}

After completing the loading of windows form how can I click a button automatically.

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