如何强制ASP.NET Web API始终返回JSON?
ASP.NET Web API默认进行内容协商 - 将根据Accept
头返回XML或JSON或其他类型。 我不需要/不需要,有没有一种方法(如属性或其他)来告诉Web API始终返回JSON?
仅支持ASP.NET Web API中的JSON - 正确的方法
用JsonContentNegotiator替换IContentNegotiator:
var jsonFormatter = new JsonMediaTypeFormatter();
//optional: set serializer settings here
config.Services.Replace(typeof(IContentNegotiator), new JsonContentNegotiator(jsonFormatter));
JsonContentNegotiator实现:
public class JsonContentNegotiator : IContentNegotiator
{
private readonly JsonMediaTypeFormatter _jsonFormatter;
public JsonContentNegotiator(JsonMediaTypeFormatter formatter)
{
_jsonFormatter = formatter;
}
public ContentNegotiationResult Negotiate(
Type type,
HttpRequestMessage request,
IEnumerable<MediaTypeFormatter> formatters)
{
return new ContentNegotiationResult(
_jsonFormatter,
new MediaTypeHeaderValue("application/json"));
}
}
清除所有格式化程序并添加Json格式化程序。
GlobalConfiguration.Configuration.Formatters.Clear();
GlobalConfiguration.Configuration.Formatters.Add(new JsonMediaTypeFormatter());
编辑
我将它添加到Application_Start()
Global.asax
。
菲利普W有正确的答案,但为了清晰和完整的工作解决方案,编辑您的Global.asax.cs文件看起来像这样:(注意我必须添加引用System.Net.Http.Formatting到股票生成的文件)
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http.Formatting;
using System.Web;
using System.Web.Http;
using System.Web.Mvc;
using System.Web.Optimization;
using System.Web.Routing;
namespace BoomInteractive.TrainerCentral.Server {
// Note: For instructions on enabling IIS6 or IIS7 classic mode,
// visit http://go.microsoft.com/?LinkId=9394801
public class WebApiApplication : System.Web.HttpApplication {
protected void Application_Start() {
AreaRegistration.RegisterAllAreas();
WebApiConfig.Register(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
//Force JSON responses on all requests
GlobalConfiguration.Configuration.Formatters.Clear();
GlobalConfiguration.Configuration.Formatters.Add(new JsonMediaTypeFormatter());
}
}
}
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