c# - 在 c# develop windows phone 中出现异常

Question

System.Runtime.Serialization.InvalidDataContractException was unhandled by user code
  HResult=-2146233088
  Message=Type 'xxx.Cost+RootObject' cannot be serialized. Consider marking it with the DataContractAttribute attribute, and marking all of its members you want serialized with the DataMemberAttribute attribute. Alternatively, you can ensure that the type is public and has a parameterless constructor - all public members of the type will then be serialized, and no attributes will be required.
  Source=System.Runtime.Serialization
  InnerException:

我看到另一个帖子，有人建议添加数据契约和数据成员。你能帮我把数据成员和数据契约(Contract)放在哪里吗？我还是不明白。

这是我的类(class)代码:

namespace xxx
{
    class Cost
    {
        public class Title
        {
            public string from { get; set; }
            public string to { get; set; }
            public string from_zip { get; set; }
            public string to_zip { get; set; }
            public string from_suburb { get; set; }
            public string to_suburb { get; set; }
        }

        public class Content
        {
            public string company { get; set; }
            public string package { get; set; }
            public string rate { get; set; }
            public string rate_second { get; set; }
            public string est_time { get; set; }
            public string inclusion { get; set; }
            public string exclusion { get; set; }
            public string last_update { get; set; }
        }

        public class RootObject
        {
            public Title title { get; set; }
            public List<Content> content { get; set; }
        }
    }
}

Answer 1

您可以在 http://msdn.microsoft.com/en-us/library/ms731073.aspx 阅读有关序列化契约(Contract)的文档。

在您的情况下，您需要使用 DataContract 属性注释您的类，以及您希望使用 DataMember 序列化的成员，如下所示。

using System.Runtime.Serialization;
class Cost
{
    [DataContract]
    public class Title
    {
        [DataMember]
        public string from { get; set; }
        [DataMember]
        public string to { get; set; }
        [DataMember]
        public string from_zip { get; set; }
        [DataMember]
        public string to_zip { get; set; }
        [DataMember]
        public string from_suburb { get; set; }
        [DataMember]
        public string to_suburb { get; set; }
    }

    [DataContract]
    public class Content
    {
        [DataMember]
        public string company { get; set; }
        [DataMember]
        public string package { get; set; }
        [DataMember]
        public string rate { get; set; }
        [DataMember]
        public string rate_second { get; set; }
        [DataMember]
        public string est_time { get; set; }
        [DataMember]
        public string inclusion { get; set; }
        [DataMember]
        public string exclusion { get; set; }
        [DataMember]
        public string last_update { get; set; }
    }

    [DataContract]
    public class RootObject
    {
        [DataMember]
        public Title title { get; set; }

        [DataMember]
        public List<Content> content { get; set; }
    }
}