反序列化复杂的JSON对象

本文关键字：对象 JSON 复杂 反序列化 | 更新日期: 2023-09-27 17:53:58

我使用JavaScript.Serializer.Deserializer来反序列化一个复杂的JSON对象，如下所示:

{
    "name": "rule 1",
    "enabled": true,
    "conditions": [{
        "type": "time",
        "time": "17:23:10",
        "days": "125"
    }, {
        "type": "sensor",
        "uid": "10.2.0.1",
        "setpoint1": 12,
        "setpoint2": 18,
        "criterion": 1
    }, {
        "type": "sensor",
        "uid": "10.3.0.1",
        "setpoint1": 12,
        "setpoint2": 18,
        "criterion": 2
    }],
    "actions": {
        "period": 100,
        "single": false,
        "act": [{
            "type": "on",
            "uid": "10.1.0.1"
        }, {
            "type": "sms",
            "message": "Hello World"
        }]
    }
}

我想把它转换成一些类，像下面这样:

public class Rule
{
    public string name { get; set; }
    public bool enabled { get; set; }
    public List<Condition> conditions { get; set; }
    public List<Action> actions { get; set; }
}
public class Condition
{
    public string type { get; set; }
    public string uid { get; set; }
    public DateTime? time { get; set; }
    public string days { get; set; }
    public double setpoint1 { get; set; }
    public double setpoint2 { get; set; }
    public int criterion { get; set; }
}
public class Action
{
    public int period { get; set; }
    public bool single { get; set; }
    public List<Act> act { get; set; }
}
public class Act
{
    public string type { get; set; }
    public string uid { get; set; }
    public string message { get; set; }
}
反序列化代码段: 
json = new JavaScriptSerializer();
Rule rule = (json.Deserialize<Rule>(jsonStr));

如果我简化Rule类并将conditions和actions声明为简单的strings，它可以正常工作。

但是如果我像上面那样使用这些类，它会抛出一个异常:

不能转换系统类型的对象。String' to type 'System.Collections.Generic.List ' 1[IoTWebApplication.Condition]'

反序列化复杂的JSON对象

您创建的结构不适合您发布的JSON。

看起来应该像

public class Rule
{
    public string name { get; set; }
    public bool enabled { get; set; }
    public Condition[ ] conditions { get; set; }
    public Actions actions { get; set; }
}
public class Actions
{
    public int period { get; set; }
    public bool single { get; set; }
    public Act[ ] act { get; set; }
}
public class Act
{
    public string type { get; set; }
    public string uid { get; set; }
    public string message { get; set; }
}
public class Condition
{
    public string type { get; set; }
    public string time { get; set; }
    public string days { get; set; }
    public string uid { get; set; }
    public int setpoint1 { get; set; }
    public int setpoint2 { get; set; }
    public int criterion { get; set; }
}

在大多数情况下，在VS中直接从JSON中获取类是很容易的

  • 复制JSON到剪贴板
  • 在VS编辑/特殊粘贴/粘贴JSON作为类(上面的代码是由这个创建的)

问题是内部(嵌套)json被引用，因此被作为字符串处理。因此，当我删除引号时，它工作得很好:

json = new JavaScriptSerializer();
Rule rule = (json.Deserialize<Rule>(jsonStr));
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