How to Ignore Null Properties in JSON Serialization with Json.Net?

Using json.net to ignore the empty attributes in json serialization

In the field of data exchange, the JSON (JavaScript object) plays a vital role in transmitting data between different systems. As developers, we often need to serialize the class to JSON and ensure that these attributes are hidden when the attribute is empty.

Consider the following categories:

<code class="language-csharp">class Test1
{
    [JsonProperty("id")]
    public string ID { get; set; }
    [JsonProperty("label")]
    public string Label { get; set; }
    [JsonProperty("url")]
    public string URL { get; set; }
    [JsonProperty("item")]
    public List<test2> Test2List { get; set; }
}</code>

Our goal is to exclude it from JSON serialization when

is empty. To this end, we can use the Test2List options provided by the JsonProperty attribute of json.net. NullValueHandling

The following code fragments demonstrate how to use

ignore the empty attribute: NullValueHandling

<code class="language-csharp">[JsonProperty("property_name", NullValueHandling=NullValueHandling.Ignore)]
public List<test2> Test2List { get; set; }

// 或者

[JsonObject(ItemNullValueHandling = NullValueHandling.Ignore)]
public class Test1
{
    // ...
}</code>

By using these options, you can ensure that the empty attribute is omitted from generated JSON, so as to provide more concise and clear data representation.

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