序列化/反序列化 Json 对象类结构 [重复]

Question

提前谢谢你。我真的坚持这一点，但练习。提前感谢您的帮助。

我能够在我的代码中成功构建这个 Json 对象，但是使用我用来构建它的同一个字典对其进行反序列化，它不起作用，因为定义的字符串类型是匿名的，我无法专门访问子项 (包含、等于、startsWith)。

我的 json 已成功构建，但在反序列化时再次不起作用。

{
"shortDescription": {
  "contains": false,
  "equals": false,
  "startsWith": true,
  "value": "some text"
},
"description": {
  "contains": true,
  "equals": false,
  "startsWith": false,
  "value": "some more text"
},
"createdAfter": {
  "contains": false,
  "equals": false,
  "startsWith": false,
  "value": "2021-08-17"
},
"notes": "Something bad happened",
"group": "some group",
"assigned": "to me"
}

这些对象（如 shortDescription）甚至可能不存在，具体取决于用户选择，这就是为什么我使用“String”构建匿名类型字典的原因 public Dictionary properties { get;放;我可以将此格式应用于需要这些属性的任何对象。

public class filter_keys
{
    public string notes { get; set; }
    public string group { get; set; }
    public string assigned { get; set; }
    public Dictionary<string, filter_properties> properties { get; set; }
}
public class filter_properties
{
    public bool contains { get; set; }
    public bool equals { get; set; }
    public bool startsWith { get; set; }
    public string value { get; set; }
}

我真的很感激一些帮助，以弄清楚如何仅为此描述和 shortDescription 字段设置一个简单的属性，不仅可以序列化数据，还可以反序列化数据，因此我可以检查这些对象是否存在在json中。

当我设置我使用的 json 时

Dictionary<string, filter_properties> keys = new Dictionary<string, filter_properties>();

keys.Add("anonymous", new filter_properties { value="can't find it" });

和/或

keys.Add("shortDescription", new filter_properties { 
                        contains = true, 
                        value = "blah blah blah"
                    });

Answer 1

就像我在评论中提到的那样，您必须在 properties 节点下使用这些属性构建您的 json。

using System;
using System.Collections.Generic;
using Newtonsoft.Json;

public class Program
{
    public static void Main()
    {
        var inJson = @"{
        ""properties"": {
            ""shortDescription"": {
              ""contains"": false,
              ""equals"": false,
              ""startsWith"": true,
              ""value"": ""some text""
            },
            ""description"": {
              ""contains"": true,
              ""equals"": false,
              ""startsWith"": false,
              ""value"": ""some more text""
            },
            ""createdAfter"": {
              ""contains"": false,
              ""equals"": false,
              ""startsWith"": false,
              ""value"": ""2021-08-17""
            }
        },
        ""notes"": ""Something bad happened"",
        ""group"": ""some group"",
        ""assigned"": ""to me""
        }";
        
        var deserialized = JsonConvert.DeserializeObject<filter_keys>(inJson);
        Console.WriteLine(deserialized.notes);
        foreach(var prop in deserialized.properties)
        {
            Console.WriteLine(prop.Key);
            Console.WriteLine(prop.Value.value);
        }
    }

    public class filter_keys
    {
        public string notes { get; set; }
        public string group { get; set; }
        public string assigned { get; set; }
        public Dictionary<string, filter_properties> properties { get; set; }
    }
    public class filter_properties
    {
        public bool contains { get; set; }
        public bool equals { get; set; }
        public bool startsWith { get; set; }
        public string value { get; set; }
    }
}

见：

https://dotnetfiddle.net/bdGTmf

Answer 2

我听从了乔纳森的指导，你当然是对的。我只是为每个项目添加了一个显式键，而不是使用通用键。

public class filter_keys
{
    public string info { get; set; }
    public string dec { get; set; }
    public string assigned { get; set; }
    public string state { get; set; }
    public string target { get; set; }
    public string caller { get; set; }
    public filter_properties shortDescription { get; set; }
    public filter_properties description { get; set; }
    public filter_properties status { get; set; }
    public DateTime date1 { get; set; }
    public DateTime date2 { get; set; }
    public DateTime date3 { get; set; }
    public DateTime date4 { get; set; }
}
public class filter_properties
{
    public bool contains { get; set; }
    public bool equals { get; set; }
    public bool startsWith { get; set; }
    public bool isNot { get; set; }
    public string _value { get; set; }
}

实施

filter_keys keys = new filter_keys();

filter_properties = new filter_properties { 
                            contains = true,
                            _value = descriptionTxt.Text
                    };
keys.description = filter_properties;

一切都很好地序列化和反序列化。

string filters = (string)Session["incidentRequest"];

if (!string.IsNullOrEmpty(filters))
{
   // for lates version of newtonsoft.json nulls cause error. Add null value handling
   filter_keys filter_values = JsonConvert.DeserializeObject<filter_keys>(filters, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });

   query += "group=" + filter_values.target;

}