在WP7中反序列化JSON

Question

我有这个JSON，我试图在Windows Phone上阅读。我一直在玩DataContractJsonSerializer和Json。. NET，但运气不太好，特别是阅读每个"条目":

{"lastUpdated":"16:12","filterOut":[],"people":
[{"ID":"x","Name":"x","Age":"x"},{"ID":"x","Name":"x","Age":"x"},{"ID":"x","Name":"x","Age":"x"}],
 "serviceDisruptions":
  {
    "infoMessages":
    ["blah blah text"],
    "importantMessages":
    [],
    "criticalMessages":
    []
  }
}

我只关心people部分的条目。基本上，我需要读取和遍历条目(包含ID、Name、Age值)，并将它们添加到Collection或类中。(我随后填充了一个列表框)

欢迎指教

Answer 1

我能够使用以下代码反序列化JSON字符串。这已经在。net 4的控制台应用程序中进行了测试，希望也能在WP 7中运行。

DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(PersonCollection));
string json =  "{"lastUpdated":"16:12","filterOut":[],"people": [{"ID":"a","Name":"b","Age":"c"},{"ID":"d","Name":"e","Age":"f"},{"ID":"x","Name":"y","Age":"z"}], "serviceDisruptions": { "infoMessages": ["blah blah text"], "importantMessages": [], "criticalMessages": [] } }";
using (var stream = new MemoryStream(Encoding.Unicode.GetBytes(json)))
{
    var people = (PersonCollection)serializer.ReadObject(stream);
    foreach(var person in people.People)
    {
        Console.WriteLine("ID: {0}, Name: {1}, Age: {2}", person.ID, person.Name, person.Age);
    }
}   

使用以下数据类:

[DataContract]
public class PersonCollection
{
    [DataMember(Name = "people")]
    public IEnumerable<Person> People { get; set; }
}
[DataContract]
public class Person
{
    [DataMember]
    public string ID { get; set; }
    [DataMember]
    public string Name { get; set; }
    [DataMember]
    public string Age { get; set; }
}

Answer 2

下面的解决方案使用Json.NET。它首先将JSON字符串反序列化为XML，然后使用LINQ to XML迭代所有people节点并将它们转换为Person类的实例。

private class Person
{
    public string ID { get; set; }
    public string Name { get; set; }
    public string Age { get; set; }
}
// deserializes your JSON and creates a list of Person objects from it
private void button1_Click(object sender, RoutedEventArgs e)
{
    // your JSON
    string json =
        "{"lastUpdated":"16:12","filterOut":[],"people": " +
        "[{"ID":"x","Name":"x","Age":"x"},{"ID":"x","Name":"x","Age":"x"},{"ID":"x","Name":"x","Age":"x"}]," +
        ""serviceDisruptions":" +
        "{" +
        ""infoMessages":" +
        "["blah blah text"]," +
        ""importantMessages":" +
        "[]," +
        ""criticalMessages":" +
        "[]" +
        "}" +
        "}";
    // deserialize from JSON to XML
    XDocument doc = JsonConvert.DeserializeXNode(json, "root");
    // iterate all people nodes and create Person objects
    IEnumerable<Person> people = from person in doc.Element("root").Elements("people")
                                 select new Person()
                                 {
                                     ID = person.Element("ID").Value,
                                     Name = person.Element("Name").Value,
                                     Age = person.Element("Age").Value
                                 };
    // this is just demonstrating that it worked
    foreach (Person person in people)
        Debug.WriteLine(person.Name);
}

不要忘记导入:

using Newtonsoft.Json;
using System.Xml.Linq;
using System.Diagnostics;

这是反序列化JSON看起来像XML文档(好奇的人在那里):

<root>
  <lastUpdated>16:12</lastUpdated>
  <people>
    <ID>x</ID>
    <Name>x</Name>
    <Age>x</Age>
  </people>
  <people>
    <ID>x</ID>
    <Name>x</Name>
    <Age>x</Age>
  </people>
  <people>
    <ID>x</ID>
    <Name>x</Name>
    <Age>x</Age>
  </people>
  <serviceDisruptions>
    <infoMessages>blah blah text</infoMessages>
  </serviceDisruptions>
</root>