Auto fill in and submit form in normal web page

Question

Auto fill in and submit form in normal web page

Ming Cheung 426

i want to automatic form submittion in normal web page,
but no idea how to start, searched but no article about it.
could anyone help some instruction? thank you

2 answers

Your answer

Answer 1

Lan Huang-MSFT 30,186 Microsoft External Staff

Hi @Ming Cheung ,
I think you can use JavaScript to do this, using the javascript onload method. Just add the following JavaScript code on your form page.

<html xmlns="http://www.w3.org/1999/xhtml">  
<head runat="server">  
    <title></title>  
        <script type="text/javascript">  
           window.onl oad = function () {  
            document.getElementById('<%= commentTextBox.ClientID %>').value = 'whatever value';  
            var form = document.getElementById("form1");  
            form.submit();  
          }  
    </script>  

</head>  
<body>  
    <form id="form1" runat="server">  
        <div>  
           <asp:TextBox id="commentTextBox" runat="server"></asp:TextBox>  
        </div>  
    </form>  
</body>  
</html>

Best regards,
Lan Huang

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Ming Cheung 426 Reputation points

2021-11-18T07:09:36.663+00:00

Sorry for my description not clear,
i want to write a C# program to call and auto submit a form which is the normal page,
after the page return, it will be a file path for download a file, i cannot find any sample like this
thank you
Lan Huang-MSFT 30,186 Reputation points Microsoft External Staff

2021-11-18T08:13:05.777+00:00

Hi @Ming Cheung ,
What is the content of the form you plan to call for automatic submission,
why do you need to submit it automatically,
and can you describe your needs in more detail?
Best regards,
Lan Huang
Ming Cheung 426 Reputation points

2021-11-18T08:40:52.79+00:00

i want to auto enroll a cert, the public CA require to submit a pin 16digits, some text number
and next page, there is a download button to download a cert file,
i want to do this programmingly, rather than i manual do 1 by 1
thank you
Lan Huang-MSFT 30,186 Reputation points Microsoft External Staff

2021-11-19T04:03:23.747+00:00

Hi @Ming Cheung ,
Is your data obtained from a third party?
Best regards,
Lan Huang
Ming Cheung 426 Reputation points

2021-11-19T06:30:23.21+00:00

Yes, it is a public CA "Hong Kong Post" web site,
it only support normal page web form, no web service no API
Ming Cheung 426 Reputation points

2021-11-19T10:01:46.23+00:00

i checked that .net has latest "webview2", obsoleted "webbroswer" component from nuget, but "webview2" not display anything, do you have any idea?
Ming Cheung 426 Reputation points

2021-11-22T02:40:33.333+00:00

Hi LanHuang
i can use the "Webview2" in VS2019, but it can not pass the proxy, and no working example after searching internet, do you have any workable reference code?
i tried a obsoleted bulid in "Webbroswer", it will ask the login for proxy, but it shows script error when broswering some normal page, i suppose it only for former version html, css, any old stuffs, so ofcourse it obsoleted.

Answer 2

Ming Cheung 426

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Auto fill in and submit form in normal web page

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