将JSON对象反序列化为c#列表

Question

我正在尝试使用Bill Reiss的教程在c#中反序列化给定的JSON文件。对于非列表中的XML数据，此方法工作得非常好，不过我想用以下结构反序列化JSON文件:

public class Data
{
    public string Att1 { get; set; }
    public string Att2 { get; set; }
    public string Att3 { get; set; }
    public string Att4 { get; set; }
}
public class RootObject
{
public List<Data> Listname { get; set; }
}

我的问题是使用JSON。Net创建/将数据放入列表，然后在XAML页面上显示列表的能力。到目前为止，我的想法(这是行不通的):

var resp = await client.DoRequestJsonAsync<DATACLASS>("URL");
string t = resp.ToString();
var _result = Newtonsoft.Json.JsonConvert.DeserializeObject<List<DATACLASS>>(t);
XAMLELEMENT.ItemsSource = _result;

Answer 1

我想你可能反序列化到错误的类型。如果你将它序列化到RootObject，然后试图反序列化到List，它将会失败。

查看示例代码

public void TestMethod1()
    {
        var items = new List<Item>
                        {
                            new Item { Att1 = "ABC", Att2 = "123" }, 
                            new Item { Att1 = "EFG", Att2 = "456" }, 
                            new Item { Att1 = "HIJ", Att2 = "789" }
                        };
        var root = new Root() { Items = items };
        var itemsSerialized = JsonConvert.SerializeObject(items);
        var rootSerialized = JsonConvert.SerializeObject(root);
        //This works
        var deserializedItemsFromItems = JsonConvert.DeserializeObject<List<Item>>(itemsSerialized); 
        //This works
        var deserializedRootFromRoot = JsonConvert.DeserializeObject<Root>(rootSerialized); 
        //This will fail.  YOu serialized it as root and tried to deserialize as List<Item>
        var deserializedItemsFromRoot = JsonConvert.DeserializeObject<List<Item>>(rootSerialized);
        //This will fail also for the same reason 
        var deserializedRootFromItems = JsonConvert.DeserializeObject<Root>(itemsSerialized);
    }
class Root
{
    public IEnumerable<Item> Items { get; set; } 
}
class Item
{
    public string Att1 { get; set; }
    public string Att2 { get; set; }
}

编辑:添加完整代码