2个属性之间的自定义验证浮动范围Asp .Net核心

public class FloatRangeAttribute : ValidationAttribute
{
    private readonly DateTime _startDate;
    private readonly DateTime _endDate;

    public FloatRangeAttribute(string startDate, string endDate)
    {
        _startDate = DateTime.Parse(startDate);
        _endDate = DateTime.Parse(endDate);
    }

    protected override ValidationResult IsValid(object value, ValidationContext validationContext)
    {
        var startDateProperty = validationContext.ObjectType.GetProperty(_startDate);
        var endDateProperty = validationContext.ObjectType.GetProperty(_endDate);

        var startDateValue = (DateTime)startDateProperty.GetValue(validationContext.ObjectInstance);
        var endDateValue = (DateTime)endDateProperty.GetValue(validationContext.ObjectInstance);

        if (endDateValue < startDateValue || endDateValue > startDateValue.AddDays(7))
        {
            return new ValidationResult(ErrorMessage);
        }

        return ValidationResult.Success;
    }
}

public class MyModel
{
    [FloatRange("StartDate", "EndDate", ErrorMessage = "结束时间必须晚于开始时间，并且在一周范围内")]
    public DateTime StartDate { get; set; }

    public DateTime EndDate { get; set; }
}