在我的应用程序中,我想显示一个文件夹及其包含的书签。我尝试实现这样的目标:
因此我必须解析以下json字符串:
{
"checksum": "7d7205349eb64a4894aafc5ce074c0c0",
"roots": {
"bookmark_bar": {
"children": [ {
"children": [ {
"date_added": "13021579661026871",
"id": "28",
"name": "design patterns - Do you allow the Web Tier to access the DAL directly? - Stack Overflow",
"type": "url",
"url": "http://stackoverflow.com/questions/796656/do-you-allow-the-web-tier-to-access-the-dal-directly"
}, {
"date_added": "13021665700468056",
"id": "31",
"name": "VS 2010 Error when creating or opening projects - Stack Overflow",
"type": "url",
"url": "http://stackoverflow.com/questions/8403853/vs-2010-error-when-creating-or-opening-projects"
} ],
"date_added": "13021579680308871",
"date_modified": "13024947520078515",
"id": "29",
"name": "StackOverflow",
"type": "folder"
}, {
"children": [ {
"date_added": "13022096980978880",
"id": "45",
"name": "Dependency injection - Wikipedia, the free encyclopedia",
"type": "url",
"url": "http://en.wikipedia.org/wiki/Dependency_injection"
}, {
"date_added": "13024941326636844",
"id": "124",
"name": "Strategy pattern - Wikipedia, the free encyclopedia",
"type": "url",
"url": "http://en.wikipedia.org/wiki/Strategy_pattern"
} ],
"date_added": "13023315356559470",
"date_modified": "13024946156966435",
"id": "72",
"name": "Wiki",
"type": "folder"
}, {
"children": [ {
"date_added": "13023667785042757",
"id": "85",
"name": "Anemic Domain Model Illustrated | Frequent incoherent cogitation",
"type": "url",
"url": "http://vitamic.wordpress.com/2007/01/04/anemic-domain-model-illustrated/"
} ],
"date_added": "13023667668403520",
"date_modified": "13023668043391377",
"id": "82",
"name": "#Read",
"type": "folder"
}, {
"date_added": "13025102943539897",
"id": "130",
"name": "Modern UI for WPF - Home",
"type": "url",
"url": "http://mui.codeplex.com/wikipage?title=screenshots&referringTitle=Home"
} ],
"date_added": "13020681767991841",
"date_modified": "13025102947408897",
"id": "1",
"name": "Lesezeichenleiste",
"type": "folder"
}
},
"version": 1
}
我尝试过GroupBy功能,但没有成功:
var items = jObject.Descendants()
.Where(x => x.Type == JTokenType.Object &&
x.Value<string>("type") != null)
.GroupBy(x => x.Value<string>("type"));
foreach (var item in items)
{
Console.WriteLine(item.Key.ToString());
foreach (var children in item)
{
Console.WriteLine(" " + children.Value<string>("name"));
}
}
我也尝试过应用Join函数,但我在这里缺少一个join属性。有人能指出我正确的方向吗?
答案 0 :(得分:6)
我会使用具体类解析json。
var root = JsonConvert.DeserializeObject<RootObj>(json);
Print(root.roots.bookmark_bar,"");
void Print(Node n,string padding)
{
Console.WriteLine(padding + "+" + n.name);
foreach(var url in n.children.Where(c => c.type == "url"))
{
Console.WriteLine(padding + "\t-" + url.name);
}
foreach (var folder in n.children.Where(c => c.type == "folder"))
{
Print(folder, padding + "\t");
}
}
public class Node
{
public string date_added { get; set; }
public string date_modified { get; set; }
public string id { get; set; }
public string name { get; set; }
public string type { get; set; }
public string url { get; set; }
public List<Node> children { get; set; }
}
public class Roots
{
public Node bookmark_bar { get; set; }
}
public class RootObj
{
public string checksum { get; set; }
public Roots roots { get; set; }
public int version { get; set; }
}
上面的代码足以解析你的json,但如果你想要* date_modified *和* date_added *字段为DateTime
,你可以实现一个JsonConverter类
var root = JsonConvert.DeserializeObject<RootObj>(json, new DateTimeConverter());
class DateTimeConverter : JsonConverter
{
public override bool CanConvert(Type objectType)
{
return objectType == typeof(DateTime);
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
return new DateTime(1970,1,1).Add(TimeSpan.FromTicks(long.Parse((string)reader.Value)));
}
public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
{
throw new NotImplementedException();
}
}
然后您的 Node 类将
public class Node
{
public DateTime date_added { get; set; }
public DateTime date_modified { get; set; }
public string id { get; set; }
public string name { get; set; }
public string type { get; set; }
public string url { get; set; }
public List<Node> children { get; set; }
}