How to Exclude Null Properties During JSON Serialization with Json.NET?

JSON.NET serialize the empty attributes

When using json.net for json serialization, you may need to ignore a specific attribute of NULL. The following is how to achieve this goal in your scene:

To ignore the test2list attribute (if its value is NULL), please use the

NULLVALUEHANDling attribute application of JSONPROPERTY.

Through this modification, if the test2list is null, it will be excluded from the JSON output. Otherwise, it will be included.

<code>[JsonProperty("id")]
public string ID { get; set; }

[JsonProperty("label")]
public string Label { get; set; }

[JsonProperty("url")]
public string URL { get; set; }

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

alternative: nullValuehandling

Another method is to use nullValuehandling:

This grammar and conditioned JSONIGNORE attributes have the same effect.

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

Class level configuration: jsonObject attribute

To ignore the NULL attributes of all attributes in the class, use the JSONObject attribute with ItemnullValueHandling:

Through this configuration, the attributes of any value in TEST1 will be excluded from JSON serialization.

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