JsonProperty似乎无法在Windows Azure应用程序服务上运行

Question

I have an application hosted in Microsoft Azure cloud. This application is an app service. I currently have some issues with a JSON serialization. The received JSON is not on the correct format. My application is an ASP.NET MVC6. Basically, I have a front, who is receiving a JSON value from a controller (server side).

C# Server side method:

[HttpGet]
[Route("domain/search")]
public IActionResult Search(string sn)
{
    // DOING MY STUFF
    ICollection<MyModel> myobject
    return new ObjectResult(myobject);
}

Model class:

public class MyModel
{
    [JsonProperty(PropertyName = "id", NullValueHandling = NullValueHandling.Ignore)]
    public string Id { get; set; }

    [JsonProperty(PropertyName = "sn", NullValueHandling = NullValueHandling.Ignore)]
    public string SerialNumber { get; set; }

    [JsonProperty(PropertyName = "state", NullValueHandling = NullValueHandling.Ignore)]
    public AStateTypeModel? State { get; set; }

    [JsonProperty(PropertyName = "description", NullValueHandling = NullValueHandling.Ignore)]
    public string Description { get; set; }

    .
    .
    ETC
    .
    .
}

Correct JSON to receive:

[  
   {  
      "id":"806c76b5-guid-guid-guid-guid",
      "sn":"X00000000000",
      "state":"AState",
      .
      .
      ETC
      .
      .
   }
]

When I am launching the application in local mode, everything is fine. I have the correct JSON values and property names. But on Azure, the front receive an incorrect JSON:

[  
   {  
      "Id":"806c76b5-guid-guid-guid-guid",
      "SerialNumber":"X00000000000",
      "Description":null,
      "State":1,
      .
      .
      ETC
      .
      .
   }
]

I thought it was a difference of package versions between my local and those present on the Azure server, but everything looks fine. The JsonProperty attribute seems to be ignored. I am currently using Windows Azure SDK 2.8, Newtonsoft 9.0.1. and AspNet.Mvc 6.0.0:

Dependencies:

"dependencies": {
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-*",
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-*",
    "Microsoft.AspNet.Mvc": "6.0.0-*",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-*",
    "Microsoft.AspNet.Tooling.Razor": "1.0.0-*",
    "Microsoft.AspNet.StaticFiles": "1.0.0-*",
    "Microsoft.AspNet.Hosting.Abstractions": "1.0.0-*",
    "Microsoft.AspNet.Diagnostics": "1.0.0-*",
    "Microsoft.AspNet.Http.Abstractions": "1.0.0-rc1-final",
    "Microsoft.AspNet.Owin": "1.0.0-rc1-final",
    "Microsoft.AspNet.SignalR.Redis": "2.2.0",
    "Microsoft.AspNet.WebSockets.Server": "1.0.0-rc1-final",
    "Microsoft.AspNet.Authentication.Cookies": "1.0.0-rc1-final",
    "Microsoft.AspNet.Authentication.OpenIdConnect": "1.0.0-rc1-final",
    "Newtonsoft.Json": "9.0.1"
  }

I don't know if I have some troubles with the JsonFormatter or something like that... What's wrong? Thanks a lot for your help!

Answer 1

It seems to me, that your enum is serialized as string in local mode and as int when deployed to Azure. You could put a [JsonConverter(typeof(StringEnumConverter))] attribute over your enum to ensure, that it is serialized as as string .

If you want to string serialization per default, you could set the Json.NET default properties like so:

JsonConvert.DefaultSettings = () => new JsonSerializerSettings
{
    Converters =
    {
        new StringEnumConverter
        {
            CamelCaseText = true
        }
    }
};

To ensure that your controller does use Json.NET, you can overload the standard Json() method in the controller and use Json(myobject) instead of ObjectResult(myobject) :

protected override JsonResult Json(object data, string contentType, Encoding contentEncoding, JsonRequestBehavior behavior)
{
    return new JsonNetResult(base.Json(data, contentType, contentEncoding, behavior));
}

private class JsonNetResult : JsonResult
{
    public JsonNetResult()
    {
        this.ContentType = "application/json";
    }

    public JsonNetResult(JsonResult existing)
    {
        this.ContentEncoding = existing.ContentEncoding;
        this.ContentType = !string.IsNullOrWhiteSpace(existing.ContentType) ? existing.ContentType : "application/json";
        this.Data = existing.Data;
        this.JsonRequestBehavior = existing.JsonRequestBehavior;
    }

    public override void ExecuteResult(ControllerContext context)
    {
        if (context == null)
        {
            throw new ArgumentNullException("context");
        }
        if ((this.JsonRequestBehavior == JsonRequestBehavior.DenyGet) && string.Equals(context.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase))
        {
            base.ExecuteResult(context);                            // Delegate back to allow the default exception to be thrown
        }

        HttpResponseBase response = context.HttpContext.Response;
        response.ContentType = this.ContentType;

        if (this.ContentEncoding != null)
        {
            response.ContentEncoding = this.ContentEncoding;
        }

        if (this.Data != null)
        {
            // Replace with your favourite serializer.
            new Newtonsoft.Json.JsonSerializer().Serialize(response.Output, this.Data);
        }
    }
}

Answer 2

I close the post, because since yesterday, it's working normally. I did nothing excepts playing with the package version of: - Microsoft.AspNet.Mvc - Newtonsoft.Json I would like to find why, but I have a lack of clues.