如何基于属性使用JSON.NET序列化枚举？

Question

下面的代码生成输出{"error_message":null,"status":"InvalidRequest"}，我希望将其输出为{"error_message":null,"status":"INVALID_REQUEST"}

简而言之，我想知道PropertyName在使用JSON.NET进行序列化时如何尊重属性？

void Main()
{
    var payload = new GooglePlacesPayload();
    payload.Status = StatusCode.InvalidRequest;
    JsonConvert.SerializeObject(payload).Dump();
}

public class GooglePlacesPayload
{
    [JsonProperty(PropertyName = "error_message")]
    public string ErrorMessage { get; set; }

    [JsonProperty(PropertyName = "status")]
    [JsonConverter(typeof(StringEnumConverter))]
    public StatusCode Status { get; set; }
}

[Flags]
public enum StatusCode
{
    // reference https://developers.google.com/maps/premium/previous-licenses/articles/usage-limits#limitexceeded
    // reference https://developers.google.com/places/web-service/search#PlaceSearchStatusCodes

    None = 0,

    // indicates that no errors occurred; the place was successfully detected and at least one result was returned.
    [JsonProperty(PropertyName = "OK")]
    Ok = 1,
    // indicates that the search was successful but returned no results. This may occur if the search was passed a latlng in a remote location.
    [JsonProperty(PropertyName = "ZERO_RESULTS")]
    ZeroResults = 2,
    // indicates that you are over your quota.  The daily quotas are reset at midnight, Pacific Time.
    [JsonProperty(PropertyName = "OVER_QUERY_LIMIT")]
    OverQueryLimit = 4,
    // indicates that your request was denied, generally because of lack of an invalid key parameter.
    [JsonProperty(PropertyName = "REQUEST_DENIED")]
    RequestDenied = 8,
    // generally indicates that a required query parameter (location or radius) is missing.
    [JsonProperty(PropertyName = "INVALID_REQUEST")]
    InvalidRequest = 16,

    // When the Google Places service returns a status code other than OK, there may be an additional error_message field within the search response object. 
    // This field contains more detailed information about the reasons behind the given status code.
    Positive = Ok | ZeroResults,
    Negative = OverQueryLimit | RequestDenied | InvalidRequest

}

Answer 1

[EnumMember(Value="INVALID_REQUEST")]应该这样做。请注意，这是一个 dotnet 核心属性，不是 newtonsoft 特定的，因此它也可能影响其他事情。