为什么我得到一个RuntimeBinderException时返回动态

Question

我使用Massive并有一个Members表。在我的Members类中，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;
        }
}

这将按照预期返回所有内容，并在单独的单元测试中测试result.Member.Id显示它已填充了数据。

在一个单独的类中，我尝试使用这个方法来检查用户是否存在并检索Member。为特定成员插入地址时使用的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;
        }
}

在读取var member = members.Find(email);的选项卡上，当我试图访问member.Member.Id时，这将返回一个RuntimeBinderException。我进入代码和查找方法是"返回"正确的数据，但它没有被传递给变量成员。奇怪的是，当我使用下面一行的代码检索用户时:

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

很好。但这并不利于保持干燥。发生了什么，有一种方法，我可以使用查找方法从我的成员类在我的地址类?

劳埃德

Answer 1

这是因为您从Find返回result，这是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;