How to Selectively Ignore JsonProperty Attributes During JSON Serialization?

Ignore JsonProperty(PropertyName = "someName") property during JSON serialization

Json.Net provides the JsonProperty property to customize the serialization process, allowing developers to specify property names during serialization. However, in some cases (such as when the client is a browser), using shorter property names to reduce load may cause problems with using shorter names in client code.

To work around this issue, you can use a custom contract parser to selectively ignore JsonProperty properties. Here’s how to do it:

<code class="language-csharp">public class LongNameContractResolver : DefaultContractResolver
{
    protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
    {
        // 使用简短名称获取默认属性
        IList<JsonProperty> properties = base.CreateProperties(type, memberSerialization);

        // 将简短名称替换为原始属性名称
        foreach (var property in properties)
        {
            property.PropertyName = property.UnderlyingName;
        }

        return properties;
    }
}</code>

This parser overrides the CreateProperties method, which first creates a list of properties using shorter names specified by the JsonProperty property. It then loops through each property and replaces the shorter name with the underlying property name.

To use this parser, set it as the contract parser of JsonSerializerSettings:

<code class="language-csharp">JsonSerializerSettings settings = new JsonSerializerSettings();
settings.ContractResolver = new LongNameContractResolver();</code>

You can then selectively ignore the JsonProperty property when serializing using custom settings:

<code class="language-csharp">// 如果 useLongNames 为 true，则忽略 JsonProperty 属性
if (useLongNames)
{
    settings.ContractResolver = new LongNameContractResolver();
}</code>

This solution allows you to programmatically control when JsonProperty properties are ignored, allowing you to get the desired serialization behavior based on the client type or specific conditions.

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