I would like to present users with feedback on the result of a webservice call in which data from a form is submitted to the webservice. The most straightforward way to do this seems to be to call the service from the controller for the page displayed after submission (the "thank you page"). The result of the webservice call can then be passed directly to the view for this page. When using an actor this is more complicated.

Two questions:

1. You can retrieve the form data using the __FormGuid and __FormSubmissionId query string parameters. Where does the form data come from at that point in the process, from the session or from the database?  I have not checked "Store form submissions"!
2. Is there any reason why you should not go down this road and do the webservice call in an actor instead?

The code I want to use is more or less like this:

    public class ThankYouPageController : PageControllerBase
    {
        public ActionResult Index(ThankYouPage currentPage)
        {
            var formGuid = Request.QueryString["__FormGuid"];
            var languageBranch = Request.QueryString["__FormLanguage"];
            var formSubmissionId = Request.QueryString["__FormSubmissionId"];

            if (!string.IsNullOrEmpty(formGuid))
            {
                var contentRepository = ServiceLocator.Current.GetInstance();
                var formDataRepository = ServiceLocator.Current.GetInstance();
                var formRepository = ServiceLocator.Current.GetInstance();

                var currentForm = contentRepository.Get(new Guid(formGuid));

                if (currentForm != null)
                {
                    var formIdentity = new FormIdentity(new Guid(formGuid), languageBranch);

                    var rawSubmittedData = formDataRepository.GetSubmissionData(formIdentity, new[] {formSubmissionId}).FirstOrDefault();

                    var friendlyNames = formRepository.GetDataFriendlyNameInfos(formIdentity);

                    if (rawSubmittedData != null)
                    {
                        var submittedData = formDataRepository.TransformSubmissionDataWithFriendlyName(
                            rawSubmittedData.Data, friendlyNames, true).ToList();

                        var dataToPost = submittedData.Where(x => x.Key == "DataToPost").Select(x => x.Value).FirstOrDefault()?.ToString();

	            // Call webservice here with dataToPost and present user feedback in the ThankYouPage
						
	            // currentPage.userFeedback = webservice.Result;
                        
                    }
                }
            }

            var model = CreateModel(currentPage);
            return View(model);
        }
}

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