JSON 如何在反序列化过程中忽略丢失的对象

Question

I have a sample JSON that when i deserialize i get "object reference not set to instance of an object" because i found out some that sometimes the field is missing then it will reappear again.

the json is similar to this

{
    "title": "Example",
    "type": "object",
    "properties": {
        "firstName": {
            "type": "string"
        },
        "lastName": {
            "type": "string"
        },
        "age": {
            "description": "Age in years",
            "type": "integer",
            "minimum": 0
        }
    }

}

if i deserialize this and map it to the corresponding fields the result is OK

but if for example the "Age" is missing

{
    "title": "Example",
    "type": "object",
    "properties": {
        "firstName": {
            "type": "string"
        },
        "lastName": {
            "type": "string"
        },
    },
    "required": ["firstName", "lastName"]
}

it will throw an error "object reference not set to instance of an object" how do i ignore the age if it's missing in JSON?

Answer 1

---

Update when you said you using json.net

I will say there is setting for Json.net try the below

JsonSerializerSettings.NullValueHandling = NullValueHandling.Ignore

---

if its real POCO object, I check if any property there with null, I assigned then with blank object. like

if(MyObject.Properties.Age==null)
{
   MyObject.Properties.Age = new Age();
}

then deserialize it.