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Editorial Team
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Asked: 2026-06-14T21:50:04+00:00

In the below code, I can set the value of the username and password

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In the below code, I can set the value of the username and password using the HTMLAgilitypack but I cannot invoke the click event of the login button (the id in the source code of the button is “s1”).

Is there anyway for this to be done? The reason I’m not using the WebBrowser is because I will need the HTMLAgilityPack to retrieve data from the page without IDs in the source code.

var doc = new HtmlWeb().Load("http://MYURL.com");
doc.DocumentNode.SelectSingleNode("name").SetAttributeValue("value", "MyUsername");
doc.DocumentNode.SelectSingleNode("password").SetAttributeValue("value", "MyPassword");
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1 Answer

  1. Editorial Team

    Is there anyway for this to be done?

    Not with what the HTML Agility Pack (HAP) library provides – not directly.

    The HAP is great for getting a single page and parsing it, but it is not designed for continued interactions. Things that are missing are cookie management, JavaScript interaction and more.

    In order to login you probably need to send an HTTP POST to the server, including the data you want – the HAP can’t help with that.

    You will need to use a class like WebRequest to make the post – I suggest looking at fiddler and using it to see what the request should look like and constructing it accordingly, though that may just be the first step.

    You may want to investigate the use of web automation tools such as selenium or WatiN instead.

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