I agree - It looks like there is a way and some instructions but for a newbie to extending umbraco its not very clear.

Hopefully so one can help.

Hi Alex,

I have created this in an Umbraco 7 instance, using an older version of Umbraco Forms. In there, I was able to get it working without larger hiccups. But in Umbraco 8 I seem to have hit an issue in which I get no errors, but builds are failing because of my custom workflow. This is my code:

public class DynamicOfficeWorkFlow : WorkflowType
{
    [Setting("Email", Description = "Enter the receiver email", View = "TextField")]
    public string Email { get; set; }

    [Setting("SenderEmail", Description = "Enter the sender email (if blank it will use the settings from /config/umbracosettings.config)", View = "TextField")]
    public string SenderEmail { get; set; }

    [Setting("Subject", Description = "Enter the subject", View = "TextField")]
    public string Subject { get; set; }

    [Setting("Message", Description = "Enter the intro message", View = "TextArea")]
    public string Message { get; set; }

    private readonly IUmbracoContextFactory _umbracoContextFactory;
    private readonly IXmlService _xmlService;
    private readonly IWorkflowEmailService _workflowEmailService;

    public DynamicOfficeWorkFlow(IUmbracoContextFactory umbracoContextFactory, IXmlService xmlService, IWorkflowEmailService workflowEmailService)
    {
        this._umbracoContextFactory = umbracoContextFactory;
        this._xmlService = xmlService;
        this._workflowEmailService = workflowEmailService;

        this.Id = new Guid("ccbeb0d5-adaa-4729-8b4c-4bb439dc0202");
        this.Name = "DynamicOfficeWorkFlow";
        this.Description = "This workflow is for changing the offices based on a dropdown";
        this.Icon = "icon-chat-active";
        this.Group = "Email";
    }

    public override List<Exception> ValidateSettings()
    {
        var exceptionList = new List<Exception>();
        if (string.IsNullOrEmpty(this.Email))
            exceptionList.Add(new Exception("'Email' setting has not been set"));
        if (string.IsNullOrEmpty(this.Message))
            exceptionList.Add(new Exception("'Message' setting has not been set'"));
        return exceptionList;
    }

    public override WorkflowExecutionStatus Execute(Record record, RecordEventArgs e)
    {
        try
        {
            string email = "";

            //Start of dropdown-recipient picker
            var dropdownValues = record.GetRecordField("Henvendelse").ValuesAsString(false);

            var settingsNode = _umbracoContextFactory.EnsureUmbracoContext().UmbracoContext.Content.GetAtRoot()
                .OfTypes("UmbracoFormsSettings");
            var umbracoFormsSettings = settingsNode.DescendantsOrSelf<UmbracoFormsSettings>().FirstOrDefault();

            var emails = umbracoFormsSettings?.Emails;

            if (emails != null)
            {
                var recipientEmail =
                    emails.FirstOrDefault(x => x.GetPropertyValue<string>("title") == dropdownValues)
                        .GetPropertyValue<string>("email");
                email = recipientEmail;
            }
            //End of dropdown-recipient picker

            var _workflowEmail =
                new SendEmail(_xmlService, _workflowEmailService)
                {
                    SenderEmail = SenderEmail,
                    Email = email,
                    Subject = Subject,
                    Message = Message,
                };
            _workflowEmail.Execute(record, e);


            return WorkflowExecutionStatus.Completed;
        }
        catch (Exception ex)
        {
            Current.Logger.Error<SendEmail>(ex, "There was a problem sending an email to {Email} from Workflow for Form {FormName} with id {FormId} for Record with unique id {RecordId}", (object)this.Email, (object)e.Form.Name, (object)e.Form.Id, (object)record.UniqueId);
            return WorkflowExecutionStatus.Failed;
        }
    }
}

There are no errors being flagged nor anything that doesn't work (well, intellisense doesn't ping it at the very least). Can you verify that this is a valid way to create a custom workflow?

Thank you very much in advance!

Update: Alright, it was a Visual Studio 2019 error, it turned out to be a Out-of-date-modelsbuilder issue. The above code works and it enables you to change the recipient-email based on a dropdown value. In case others would like to do this in an Umbraco 8.8.0 with the "newest" Umbraco Forms version, installed through NuGet.