asp.net vnext camelCase JSON serialization [duplicate] - asp.net

Question

Here is my Configure method from my Startup class.
public void Configure(IApplicationBuilder app)
{
// Setup configuration sources
var configuration = new Configuration();
configuration.AddJsonFile("config.json");
configuration.AddEnvironmentVariables();
// Set up application services
app.UseServices(services =>
{
// Add EF services to the services container
services.AddEntityFramework()
.AddSqlServer();
// Configure DbContext
services.SetupOptions<DbContextOptions>(options =>
{
options.UseSqlServer(configuration.Get("Data:DefaultConnection:ConnectionString"));
});
// Add Identity services to the services container
services.AddIdentitySqlServer<ApplicationDbContext, ApplicationUser>()
.AddAuthentication();
// Add MVC services to the services container
services.AddMvc();
});
// Enable Browser Link support
app.UseBrowserLink();
// Add static files to the request pipeline
app.UseStaticFiles();
// Add cookie-based authentication to the request pipeline
app.UseCookieAuthentication(new CookieAuthenticationOptions
{
AuthenticationType = ClaimsIdentityOptions.DefaultAuthenticationType,
LoginPath = new PathString("/Account/Login"),
});
// Add MVC to the request pipeline
app.UseMvc(routes =>
{
routes.MapRoute(
name: "default",
template: "{controller}/{action}/{id?}",
defaults: new { controller = "Home", action = "Index" });
routes.MapRoute(
name: "api",
template: "{controller}/{id?}");
});
}
Where can I access the HttpConfiguration instance, so that I could set the CamelCasePropertyNamesContractResolver, just like I did in WebApi 2:
var formatterSettings = config.Formatters.JsonFormatter.SerializerSettings;
formatterSettings.Formatting = Formatting.None;
formatterSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();

Answer 1

Replace services.AddMvc(); with the following.
services.AddMvc().SetupOptions<MvcOptions>(options =>
{
int position = options.OutputFormatters.FindIndex(f =>
f.Instance is JsonOutputFormatter);
var settings = new JsonSerializerSettings()
{
ContractResolver = new CamelCasePropertyNamesContractResolver()
};
var formatter = new JsonOutputFormatter(settings, false);
options.OutputFormatters.Insert(position, formatter);
});
UPDATE
With the current version of ASP.NET, this should do.
services.AddMvc().Configure<MvcOptions>(options =>
{
options.OutputFormatters
.Where(f => f.Instance is JsonOutputFormatter)
.Select(f => f.Instance as JsonOutputFormatter)
.First()
.SerializerSettings
.ContractResolver = new CamelCasePropertyNamesContractResolver();
});
UPDATE 2
With ASP.NET 5 beta5, which is shipped with Visual Studio 2015 RTM, the following code works
services.AddMvc().Configure<MvcOptions>(options =>
{
options.OutputFormatters.OfType<JsonOutputFormatter>()
.First()
.SerializerSettings
.ContractResolver = new CamelCasePropertyNamesContractResolver();
});
UPDATE 3
With ASP.NET 5 beta7, the following code works
services.AddMvc().AddJsonOptions(opt =>
{
opt.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
});
RC2 UPDATE
MVC now serializes JSON with camel case names by default. See this announcement.
https://github.com/aspnet/Announcements/issues/194

Answer 2

The Configure function was removed from services.AddMvc() in either Beta 6 or 7. For Beta 7, in Startup.cs, add the following to the ConfigureServices function:
services.AddMvc().AddJsonOptions(options =>
{
options.SerializerSettings.ContractResolver =
new CamelCasePropertyNamesContractResolver();
});

Answer 3

Use below setting to avoid lowercase replacement for .net core
services.AddMvc().AddJsonOptions(options => options.JsonSerializerOptions.PropertyNamingPolicy = null);