C# Bot Framework : Form flow set value for the field based on previous Answer [duplicate] - bots

Question

Hello I'm new to Microsoft Bot Framework and I have a question that I couldn't find an answer to.
I have a FormFlow that ask the user for some question, after a specific question I want the bot to do some logic and show messages accordingly (for example if the user selected option 1 then show message X and if the user selected option 2 show message Y).
Here is my code:
using Microsoft.Bot.Builder.FormFlow;
using Microsoft.Bot.Builder.Dialogs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace Bot_CRM.FormFlow
{
public enum RequestOptions { Unknown, CheckStatus, CreateCase };
[Serializable]
public class CaseFormFlow
{
public RequestOptions RequestType;
[Prompt("What is your first name?")]
public string FirstName;
public string LastName;
public string ContactNumber;
[Prompt("Please enter your id")]
public string Id;
public static IForm<CaseFormFlow> BuildForm()
{
OnCompletionAsyncDelegate<CaseFormFlow> processRequest = async (context, state) =>
{
await context.PostAsync($#"Thanks for your request");
};
return new FormBuilder<CaseFormFlow>()
.Message("Hello and welcom to my service desk bot")
.Field(nameof(FirstName))
.Message("hello {FirstName}")
.Field(nameof(Id))
.Field(nameof(RequestType)) =>
//here if user select 1 start flow of check status and if user select 2 start flow of create case
.AddRemainingFields()
.Message("Thank you request. Our help desk team will get back to you shortly.")
.OnCompletion(processRequest)
.Build();
}
}
}
Updated code after Ezequiel's suggestion:
return new FormBuilder<CaseFormFlow>()
.Message("Hello and welcom to my service desk bot")
.Field(nameof(FirstName))
.Message("hello {FirstName}")
.Field(new FieldReflector<CaseFormFlow>(nameof(RequestType))
.SetActive(state => state.AskUserForRequestType)
.SetNext((value, state) =>
{
var selection = (RequestOptions)value;
if (selection == RequestOptions.CheckStatus)
{
return new NextStep(new[] { nameof(Id) });
}
else
{
return new NextStep();
}
}))
Thanks in advance for the help

Answer 1

This is a great question.The key thing is to use the SetActive and SetNext methods of the Field<T> class. You should consider using the FieldReflector class; though you can implement your own IField.
SetActive is described in the Dynamic Fields section of the FormFlow documentation. Basically it provides a delegate that enables the field based on a condition.
SetNext will allow you to decide what step of the form should come next based on your custom logic.
You can take a look to the ContosoFlowers sample. In the Order form; something similar is being done.
public static IForm<Order> BuildOrderForm()
{
return new FormBuilder<Order>()
.Field(nameof(RecipientFirstName))
.Field(nameof(RecipientLastName))
.Field(nameof(RecipientPhoneNumber))
.Field(nameof(Note))
.Field(new FieldReflector<Order>(nameof(UseSavedSenderInfo))
.SetActive(state => state.AskToUseSavedSenderInfo)
.SetNext((value, state) =>
{
var selection = (UseSaveInfoResponse)value;
if (selection == UseSaveInfoResponse.Edit)
{
state.SenderEmail = null;
state.SenderPhoneNumber = null;
return new NextStep(new[] { nameof(SenderEmail) });
}
else
{
return new NextStep();
}
}))
.Field(new FieldReflector<Order>(nameof(SenderEmail))
.SetActive(state => !state.UseSavedSenderInfo.HasValue || state.UseSavedSenderInfo.Value == UseSaveInfoResponse.Edit)
.SetNext(
(value, state) => (state.UseSavedSenderInfo == UseSaveInfoResponse.Edit)
? new NextStep(new[] { nameof(SenderPhoneNumber) })
: new NextStep()))
.Field(nameof(SenderPhoneNumber), state => !state.UseSavedSenderInfo.HasValue || state.UseSavedSenderInfo.Value == UseSaveInfoResponse.Edit)
.Field(nameof(SaveSenderInfo), state => !state.UseSavedSenderInfo.HasValue || state.UseSavedSenderInfo.Value == UseSaveInfoResponse.Edit)
.Build();
}
}
}