自定义JSON序列化器

Question

I have a class,

partial class Customer
{
    [JsonProperty]
    public string Name { get; set; }

    [JsonProperty]
    public string Address{ get; set; }

    [JsonProperty]
    public string CardInfo { get; set; }         

    public int CustomerId { get; set; }
}

when I serialize this, the customerId is not there. And that's how I wanted it to work. I have a separate method where I need to send the customerId back. so may be I should use a custom serializer? is there a way to achieve this using the same class.

Answer 1

You can use the conditional serialization feature of JSON.Net:

partial class Customer
{
    // Ignoring the property since it's only used to indicate if we should serialize
    // CustomerId or not
    [JsonIgnore]
    public bool IncludeCustomerId {get;set;}

    [JsonProperty]
    public string Name { get; set; }

    [JsonProperty]
    public string Address{ get; set; }

    [JsonProperty]
    public string CardInfo { get; set; }         

    public int CustomerId { get; set; }

    public bool ShouldSerializeCustomerId()
    {
        return IncludeCustomerId;
    }
}

Now Json.Net will only serialize CustomerId if you set IncludeCustomerId to true .