Question

This is something I am curious about since I learnt how to invoke an url and get a http response so I could parse the results in my application. Something like what Chris M says here:

Faking browser request in ASP.net C#

Now what I am wondering is how can I post a form that I download in this way, filling in the fields of the form.

I don’t really need this for my work, it’s just to kill my curiosity as a programmer 🙂

Answer 1

The easiest way (in C#) to simulate a form post with values:

using (WebClient client = new WebClient()) {     NameValueCollection fields = new NameValueCollection();     fields.Add('foo', '123');     fields.Add('bar', 'abc');     client.UploadValues(address, fields); } 

Just for completeness, jQuery can do it more efficiently again…

$.post(address, { foo: '123', bar: 'abc' } ); 

If you want to inspect the html to create your POST, either use WebBrowser and automation, or use the Html Agility Pack to look at it.