为什么我在返回动态时收到 RuntimeBinderException？

Question

我正在使用 Massive 并有一个成员表。在我的 Members 类上，我有一个 find 方法来通过电子邮件查找成员：

   public class Members : DynamicModel
    {
        public Members(): base("TSConnection", "Members", "Id"){}

        public dynamic Find(string email)
        {
            dynamic result = new ExpandoObject();
            result.Success = false;
            try
            {
                result.Member = this.Single(where: "Email=@0", args: email);
                result.Success = result.Member != null;
            }
            catch (Exception ex)
            {
                result.Message = ex.Message;
            }
            return result;
        }
}

这会按预期返回所有内容，并且在单独的单元测试中， result.Member.Id 显示它已填充了数据。

在一个单独的类中，地址。我尝试使用此方法来检查用户是否存在并检索要在插入特定成员的地址时使用的 Member.Id：

 public class Addresses : DynamicModel
    {
        public Addresses() : base("TS", "Addresses", "Id") { }

        public dynamic Create(string email, string type, string address1, string address2, string city, string state, int countryId, string postcode)
        {
            var members = new Members();
            dynamic result = new ExpandoObject();
            result.Success = false;
            //var member = members.Find(email);

            result.Member = members.Single(where: "Email=@0", args: email);
            dynamic address = new ExpandoObject();

            if (result.Member != null)
            {
                address.Id = this.Insert(new {
                    MemberId = result.Member.Id,  
                    AddressTypeId = (int)AddressType.Account,
                    Address1 = address1,
                    Address2 = address2,
                    City = city,
                    State = state,
                    Country = countryId,
                    Postcode = postcode
                });
                result.Address = address.Id != 0 ? address : null;
                result.Success = address.Id != 0;
            }
            return result;
        }
}

在选项卡式行上，显示 var member = Members.Find(email); 当我尝试访问 member.Member.Id 时，这会返回 RuntimeBinderException。我进入代码，Find 方法“返回”正确的数据，但它没有传递给变量成员。奇怪的是，当我使用代码在下面的行中检索用户时：

result.Member = members.Single(where: "Email=@0", args: email);

它工作正常。但不太适合保持干燥。发生了什么事，有没有办法可以在 Addresses 类中使用 Members 类中的 Find 方法？

劳埃德

Answer 1

这是因为您从 Find 返回 结果，它是一个 ExpandoObject。要访问 Addresses 中的 Member，您需要将代码更改为：

var members = new Members();
var result = members.Find(email);
var member = result.Member;