I don't know If I've understood exactly what you want to accomplish but as far as I think I've got it:

First of all, when you have an XForm Property on a Page you need to select a specific XForm on that Page. I think you can accomplish this by adding some logic on overriding the CreateDefaultValues method.
Though I don't think creating a new XForm for each page would be a good idea. Maybe if you could use a generic XForm for all these pages?

Another problem would be how your code should know whether the page should be created with "attend" or "comment" since they are the same Page Type.

Either way, if you only want to store things in the XForm, you don't need to create the fields in the XForm to be able to store it.

Say you have an instance of XForm in the variable form and the page that holds your values in the variable pageData.

All you need to do is:

XFormData data = form.CreateFormData();
data.PageGuid = pageData.PageGuid;
data.SetValue("MyCustomFieldName", "MyValueAsString");
data.ChannelOptions = ChannelOptions.Database;
data.Send();

Hi Alf,

Thanks for your help. To clarify I will list what I have done and what I try to achieve. It is basically just to do programatically what an Editor will do when creating a new form, and putting this form on a page with an XForm property.

What I have done is:

1) Created a page type, RegistrationPage, which has an XForm property

2) Created a new page, NewYearsEve, which is of type RegistrationPage

What I want to continue to do programmatically is:

3) Create a new form with some form fields, e.g. an "attending: yes/no" checkbox.
    I know an editor can create such a form from the UI in edit mode, but I would like to do the same from code (if possible).

4) Connect the form created in step 3 with the page created in step 2.
    This is the same as going to the created page in the UI, and then click on the "select form" for the XForm property

I will take a look at your suggestion of overriding the CreateDefaultValues method, and see if this can help.

-----
Update:

Got it to work by setting the XForm.Document directly in the code where I created the page.

Hey Olav, I know it has passed some time, but do you maybe have the code that you used for this problem?

I really don't know how to programatically add select and submit to the Xform.Document, on which way?

Thanks in advance :)

Hi,

I wonder if you can you please send me the code that you did to resolve this issue will be highly appreciated?

My email id is  "emmathomasmcad@outlook.com"

Thanks,
Emma