An extension for CsQuery to format a request body from a form element.

This extension simply adds the following extension methods to IHTMLFormElement.

IEnumerable<NameValueType> GetNameValueTypes(this IHTMLFormElement form, IDomElement submitter)

• This allows you to get the data set with a specific submitter node (e.g. the button pressed).

IEnumerable<NameValueType> GetNameValueTypes(this IHTMLFormElement form, bool implicitSubmission)

• This allows you to get the data set using implicit submission if you pass true or no submitter at all if you pass false.

Here's a bit of code that downloads Reddit's front page (CQ.CreateFromUrl) and interprets the DOM to get the names and values that would be POSTed on log in.

// get a CQ context
CQ document = CQ.CreateFromUrl("http://www.reddit.com");

// fill in some form fields
document["#login_login-main input[name=user]"].Val("foo");
document["#login_login-main input[name=passwd]"].Val("bar");

// get the containing form
IHTMLFormElement loginForm = document["#login_login-main"].OfType<IHTMLFormElement>().First();

// get the data representing the form, using implicit submission
IEnumerable<NameValueType> nameValueTypes = loginForm.GetNameValueTypes(true);

// output the results
foreach (var nameValueType in nameValueTypes)
{
    Console.WriteLine("{0} = {1}", nameValueType.Name, nameValueType.Value);
}

The output should look something like this:

op = login-main
user = foo
passwd = bar

• CsQuery
• .NET 4.0 or newer

• dirname attributes.
• file uploads (<input type=file>).
• correct handling of <textarea> values.
• <keygen> elements.

• Generating HttpContent from an IHTMLFormElement.
• Generating HttpRequestMessage from an IHTMLFormElement and a URL.

The code is well tested, 100% code coverage on the CsQuery.FormFields assembly.