How Can I Ignore Null Properties and Lists in JSON Serialization with Json.NET?

Use json.net to ignore the attributes in json serialization

When using json.net for serialization, it is a common demand to selectively exclude air attributes. This article discusses several technologies that achieve this goal, especially paying attention to the attributes of ignoring the list objects.

Overview of the question

Suppose you have a class called Test1, which include ID, label, URL, and a list of objects called Test2. You hope to turn Test1 sequences to JSON, but it only includes it when the test2 list is not empty.

jsonignore attribute

If the test2 list is empty, you can use the attribute to exclude it from the JSON output. However, this method has a limitations. If the TEST2 list is not empty, it will always be included even if it contains vacant items.

JSONPROPERTY attributes in combination with nullValuehandling

[JsonIgnore]

Another solution is to use

attributes with together. This allows you to ignore the attribute of the explicit settings to NULL. The following code demonstrates this method:

Set the global NULLVALUEHANDling [JsonProperty] NullValueHandling=NullValueHandling.Ignore

If you want to apply the empty value to all the attributes in the class, you can use the

[JsonProperty("item", NullValueHandling = NullValueHandling.Ignore)]
public List<test2> Test2List { get; set; }

attribute in the class itself. This will ensure that all vacancy is ignored during serialization.

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