Azure的移动应用定制JSON序列化 [英] Azure Mobile App customizing json serialization

问题描述

我不能似乎能够自定义在Azure中移动应用JSON序列化。

I can't seem to be able to customize JSON serialization in an Azure Mobile App.

要避免的我自己的代码，我建立一个新的项目的复杂性从头开始。 Visual Studio的社区2015年更新2的Azure应用服务工具V2.9（如果该事项）。新建项目时，Visual C＃，云，Azure的移动应用。

To avoid the complexity of my own code, I setup a new project from scratch. Visual Studio Community 2015 Update 2, Azure App Service Tools v2.9 (if that matters). New Project, Visual C#, Cloud, Azure Mobile App.

在 App_Start\Startup.MobileApp.cs 此是什么模板：

public static void ConfigureMobileApp(IAppBuilder app)
{
    HttpConfiguration config = new HttpConfiguration();

    new MobileAppConfiguration()
        .UseDefaultConfiguration()
        .ApplyTo(config);

    // Use Entity Framework Code First to create database tables based on your DbContext
    Database.SetInitializer(new MobileServiceInitializer());

    MobileAppSettingsDictionary settings = config.GetMobileAppSettingsProvider().GetMobileAppSettings();

    if (string.IsNullOrEmpty(settings.HostName))
    {
        app.UseAppServiceAuthentication(new AppServiceAuthenticationOptions
        {
            // This middleware is intended to be used locally for debugging. By default, HostName will
            // only have a value when running in an App Service application.
            SigningKey = ConfigurationManager.AppSettings["SigningKey"],
            ValidAudiences = new[] { ConfigurationManager.AppSettings["ValidAudience"] },
            ValidIssuers = new[] { ConfigurationManager.AppSettings["ValidIssuer"] },
            TokenHandler = config.GetAppServiceTokenHandler()
        });
    }

    app.UseWebApi(config);
}

这是我曾尝试：

public static void ConfigureMobileApp(IAppBuilder app)
{
    JsonConvert.DefaultSettings = () => new JsonSerializerSettings()
    {
        Converters = { new StringEnumConverter { CamelCaseText = true }, },
        ContractResolver = new CamelCasePropertyNamesContractResolver { IgnoreSerializableAttribute = true },
        DefaultValueHandling = DefaultValueHandling.Ignore,
        NullValueHandling = NullValueHandling.Ignore,
        Formatting = Formatting.Indented
    };

    HttpConfiguration config = new HttpConfiguration();
    config.Formatters.JsonFormatter.SerializerSettings = JsonConvert.DefaultSettings();

    new MobileAppConfiguration()
        .UseDefaultConfiguration()
        .ApplyTo(config);

    ...
}

运行此和访问的http：//本地主机：53370 /表/内的TodoItem ，JSON是没有缩进，并有一堆假字段，这表明被忽略的设置。

Running this and accessing http://localhost:53370/tables/TodoItem, json is not indented, and has a bunch of false fields, which shows settings are being ignored.

所以，我怎么能更改序列化设置，以便他们将在这个配置得到尊重？返回一个 JsonResult 与每个控制器的作品我自己的自定义设置，但只允许我发送 200 OK 状态（我有赴汤蹈火返回 201创建尊重我的设置）。

So how can I change serializer settings so that they will be respected in this configuration? Returning a JsonResult with my own custom settings from every controller works, but only allows me to send 200 OK status (I have to jump through hoops to return a 201 Created that respects my settings).

推荐答案

在此花费了大量的时间后，我觉得你可以做的最好的就是创建一个 MobileAppControllerConfigProvider ，并把它传递给 WithMobileAppControllerConfigProvider 。

After spending a lot of time on this, I think the best you can do is create a MobileAppControllerConfigProvider and pass it to WithMobileAppControllerConfigProvider.

这是我在做什么，让所有控制器尊重 JsonConvert.DefaultSettings ：

This is what I'm doing, to get all controllers to respect JsonConvert.DefaultSettings:

JsonConvert.DefaultSettings = () => new JsonSerializerSettings { /* something */ };

var provider = new MobileConfigProvider();

var config = new HttpConfiguration();
config.MapHttpAttributeRoutes();
config.Formatters.Remove(config.Formatters.XmlFormatter);
config.Formatters.JsonFormatter.UseDataContractJsonSerializer = false;
config.Formatters.JsonFormatter.SerializerSettings = provider.Settings;

new MobileAppConfiguration().
    MapApiControllers().
    AddMobileAppHomeController().
    AddPushNotifications().
    WithMobileAppControllerConfigProvider(provider).
    ApplyTo(config);

和

sealed class MobileConfigProvider : MobileAppControllerConfigProvider
{
    readonly Lazy<JsonSerializerSettings> settings = new Lazy<JsonSerializerSettings>(JsonConvert.DefaultSettings);

    public JsonSerializerSettings Settings => settings.Value;

    public override void Configure(HttpControllerSettings controllerSettings, HttpControllerDescriptor controllerDescriptor)
    {
        base.Configure(controllerSettings, controllerDescriptor);
        controllerSettings.Formatters.JsonFormatter.SerializerSettings = Settings;
    }
}

这篇关于Azure的移动应用定制JSON序列化的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！