Microsoft Bot Framework Form Builder C#，在构建表单之前获取用户输入

Question

如何在构建表单之前获取用户输入。例如，如果用户在表单流期间的任何时间键入 "exit"，我想将用户输入保存到状态变量中并检查它是否等于 "exit"，如果等于 return null或者做一些代码。

namespace MyBot.Helpers
{

public enum Person
{

    //      [Describe("I am a Student")]
    IAmStudent,
    //    [Describe("I am an Alumni")]
    IAmAlumni,
    //  [Describe("Other")]
    Other

};
public enum HardInfo { Yes, No };

[Serializable]
public class FeedBackClass
{
    public bool AskToSpecifyOther = true;
    public string OtherRequest = string.Empty;


    [Prompt("May I Have Your Name?")]
    [Pattern(@"^[a-zA-Z ]*$")]
    public string Name { get; set; }
    [Prompt("What is your Email Address?")]
    public string Email { get; set; }

    [Prompt("Please Select From The Following? {||}")]
    [Template(TemplateUsage.NotUnderstood, "What does \"{0}\" mean?", ChoiceStyle = ChoiceStyleOptions.Auto)]
    public Person? PersonType { get; set; }

    [Prompt("Please Specify Other? {||}")]
    public string OtherType { get; set; }

    [Prompt("Was The Information You Are Looking For Hard To Find? {||}")]
    [Template(TemplateUsage.NotUnderstood, "What does \"{0}\" mean?", ChoiceStyle = ChoiceStyleOptions.Auto)]
    public HardInfo? HardToFindInfo { get; set; }

    public static IForm<FeedBackClass> MYBuildForm()
    {
        var status = "exit";
        if (status == null) {
            return null;
        }

        else
        {
            return new FormBuilder<FeedBackClass>()
                .Field(nameof(Name), validate: ValidateName)
                .Field(nameof(Email), validate: ValidateContactInformation)
                .Field(new FieldReflector<FeedBackClass>(nameof(PersonType))
                            .SetActive(state => state.AskToSpecifyOther)
                            .SetNext(SetNext))
                 .Field(nameof(OtherType), state => state.OtherRequest.Contains("oth"))
                 .Field(nameof(HardToFindInfo)).Confirm("Is this your selection?\n{*}")
                .OnCompletion(async (context, state) =>
                {
                    await context.PostAsync("Thanks for your feedback! You are Awsome!");
                    context.Done<object>(new object());

                })

                .Build();
        }

Answer 1

if the user typed "exit" at any time during the formflow, I want to save the user input into a status variable and check if it equals "exit" and if it does then return null or do some code.

您似乎想实现全局处理程序来处理 "exit" 命令。 Scorables 可以拦截发送到 Conversation 的每条消息，并根据您定义的逻辑对消息进行评分，可以帮助您实现，您可以试试。

详细信息请参考Global message handlers using scorables or this Global Message Handlers Sample

下面的代码片段适合我，你可以参考。

退出对话框:

public class ExitDialog : IDialog<object>
{
    public async Task StartAsync(IDialogContext context)
    {
        await context.PostAsync("This is the Settings Dialog. Reply with anything to return to prior dialog.");

        context.Wait(this.MessageReceived);
    }

    private async Task MessageReceived(IDialogContext context, IAwaitable<IMessageActivity> result)
    {
        var message = await result;

        if ((message.Text != null) && (message.Text.Trim().Length > 0))
        {
            context.Done<object>(null);
        }
        else
        {
            context.Fail(new Exception("Message was not a string or was an empty string."));
        }
    }
}

ExitScorable:

public class ExitScorable : ScorableBase<IActivity, string, double>
{
    private readonly IDialogTask task;

    public ExitScorable(IDialogTask task)
    {
        SetField.NotNull(out this.task, nameof(task), task);
    }

    protected override async Task<string> PrepareAsync(IActivity activity, CancellationToken token)
    {
        var message = activity as IMessageActivity;

        if (message != null && !string.IsNullOrWhiteSpace(message.Text))
        {
            if (message.Text.ToLower().Equals("exit", StringComparison.InvariantCultureIgnoreCase))
            {
                return message.Text;
            }
        }

        return null;
    }

    protected override bool HasScore(IActivity item, string state)
    {
        return state != null;
    }

    protected override double GetScore(IActivity item, string state)
    {
        return 1.0;
    }

    protected override async Task PostAsync(IActivity item, string state, CancellationToken token)
    {
        var message = item as IMessageActivity;

        if (message != null)
        {
            var settingsDialog = new ExitDialog();

            var interruption = settingsDialog.Void<object, IMessageActivity>();

            this.task.Call(interruption, null);

            await this.task.PollAsync(token);
        }
    }

    protected override Task DoneAsync(IActivity item, string state, CancellationToken token)
    {
        return Task.CompletedTask;
    }
}

GlobalMessageHandlersBotModule:

public class GlobalMessageHandlersBotModule : Module
{
    protected override void Load(ContainerBuilder builder)
    {
        base.Load(builder);

        builder
            .Register(c => new ExitScorable(c.Resolve<IDialogTask>()))
            .As<IScorable<IActivity, double>>()
            .InstancePerLifetimeScope();
    }
}

注册模块：

Conversation.UpdateContainer(
    builder =>
    {
        builder.RegisterModule(new ReflectionSurrogateModule());
        builder.RegisterModule<GlobalMessageHandlersBotModule>();
    });

测试结果：

Microsoft Bot Framework Form Builder C#，在构建表单之前获取用户输入

Microsoft Bot Framework Form Builder C#, Getting User input before building the form

c#

chatbot

formbuilder

botframework

formflow