在bot framework v4中单击提交后对自适应表单字段的验证

// 创建自定义对话框类
public class MyFormDialog : WaterfallDialog
{
    public MyFormDialog(string dialogId) : base(dialogId)
    {
        // 定义表单流程
        AddStep(AskNameAsync);
        AddStep(AskAgeAsync);
        AddStep(ValidateFormAsync);
        AddStep(ProcessFormAsync);

        // 定义表单字段
        Field<string>("name");
        Field<int>("age");
    }

    // 提问姓名
    private async Task<DialogTurnResult> AskNameAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
    {
        return await stepContext.PromptAsync("name", new PromptOptions { Prompt = MessageFactory.Text("请输入您的姓名：") }, cancellationToken);
    }

    // 提问年龄
    private async Task<DialogTurnResult> AskAgeAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
    {
        stepContext.Values["name"] = (string)stepContext.Result;
        return await stepContext.PromptAsync("age", new PromptOptions { Prompt = MessageFactory.Text("请输入您的年龄：") }, cancellationToken);
    }

    // 验证表单字段
    private async Task<DialogTurnResult> ValidateFormAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
    {
        var name = (string)stepContext.Values["name"];
        var age = (int)stepContext.Result;

        // 对姓名进行验证
        if (string.IsNullOrEmpty(name))
        {
            await stepContext.Context.SendActivityAsync("姓名不能为空！");
            return await stepContext.ReplaceDialogAsync(Id, cancellationToken: cancellationToken);
        }

        // 对年龄进行验证
        if (age < 18)
        {
            await stepContext.Context.SendActivityAsync("年龄必须大于等于18岁！");
            return await stepContext.ReplaceDialogAsync(Id, cancellationToken: cancellationToken);
        }

        return await stepContext.NextAsync(stepContext.Values, cancellationToken);
    }

    // 处理表单数据
    private async Task<DialogTurnResult> ProcessFormAsync(WaterfallStepContext stepContext, CancellationToken cancellationToken)
    {
        var name = (string)stepContext.Values["name"];
        var age = (int)stepContext.Values["age"];

        // 处理表单数据
        await stepContext.Context.SendActivityAsync($"您的姓名是{name}，年龄是{age}岁。");

        return await stepContext.EndDialogAsync(cancellationToken: cancellationToken);
    }
}

// 在对话中使用表单流程
public class MyDialog : ComponentDialog
{
    public MyDialog() : base(nameof(MyDialog))
    {
        var dialogs = new DialogSet();

        // 添加自定义对话框
        dialogs.Add(new MyFormDialog(nameof(MyFormDialog)));

        // 添加对话处理方法
        AddDialog(new WaterfallDialog(nameof(WaterfallDialog), new WaterfallStep[]
        {
            async (stepContext, cancellationToken) =>
            {
                return await stepContext.BeginDialogAsync(nameof(MyFormDialog), cancellationToken: cancellationToken);
            },
            async (stepContext, cancellationToken) =>
            {
                // 处理对话结果
                if (stepContext.Result is IDictionary<string, object> result)
                {
                    // 处理表单数据
                    var name = (string)result["name"];
                    var age = (int)result["age"];
                    await stepContext.Context.SendActivityAsync($"您的姓名是{name}，年龄是{age}岁。");
                }

                return await stepContext.EndDialogAsync(cancellationToken: cancellationToken);
            }
        }));

        InitialDialogId = nameof(WaterfallDialog);
    }
}