在SetValidate调用中设置对话框属性值无效

给定以下formflow设置。。。

return builder
    .Field(new FieldReflector<CarValuationDialog>(nameof(Mileage))
        .SetValidate(async (state, value) =>
            {
                var result = new ValidateResult { IsValid = true };

                if (int.TryParse(value.ToString(), out int mileage))
                {
                    state.Mileage = mileage;
                    result.IsValid = true;
                }
                else
                {
                    result.Feedback = "That isn't valid number. Can you enter it again please?";
                    result.IsValid = false;
                }

                return result;
            }))

    .Field(new FieldReflector<CarValuationDialog>(nameof(HappyWithAnswersBuying))
        .SetActive(carValuationDialog => carValuationDialog.ValuationOption == ValuationOptions.LookingToOwn)
        .SetPrompt(CreateHappyWithAnswersBuyingPrompt())
        .SetDefine(HappyWithAnswersDefinitionMethod))
    .OnCompletion(GetValuationAndDisplaySummaryToUser)
    .Build();

我想对用户给出的里程回答进行自定义验证。密码 SetValidate 执行,并给定一个有效整数,将该数字分配给 state.Mileage .

但是,当显示询问用户是否满意答案的提示时,里程仍然设置为0。。

下面是提示的代码。。

private static PromptAttribute CreateHappyWithAnswersBuyingPrompt()
{
    StringBuilder sb = new StringBuilder(100);

    sb.Append("Are you happy with your answers? <br /><br />");
    sb.Append("{&RegistrationNumber}: {RegistrationNumber} <br />");
    sb.Append("{&Mileage}: {Mileage:N0} miles {||}");

    return new PromptAttribute(sb.ToString())
    {
        ChoiceStyle = ChoiceStyleOptions.Buttons,
        FieldCase = CaseNormalization.InitialUpper
    };
}

在我添加 设置验证 代码,里程在提示中显示得非常好。但由于我现在手动设置 状态里程 ,因为某种原因,它没有被持久化。