如何强制的ASP.NET Web API总是返回JSON？ [英] How to force ASP.NET Web API to always return JSON?

问题描述

的ASP.NET Web API的默认操作内容协商 - 将返回XML或JSON或根据接受头其它类型。我并不需要/想这一点，是有办法（如属性或东西）来告诉网页API总是返回JSON？

ASP.NET Web API does content negotiation by default - will return XML or JSON or other type based on the Accept header. I don't need / want this, is there a way (like an attribute or something) to tell Web API to always return JSON?

推荐答案

<一个href=\"http://www.strathweb.com/2013/06/supporting-only-json-in-asp-net-web-api-the-right-way/\">Supporting只有在JSON的ASP.NET Web API - 的正确方法

替换IContentNegotiator与JsonContentNegotiator：

Replace IContentNegotiator with JsonContentNegotiator:

var jsonFormatter = new JsonMediaTypeFormatter();
//optional: set serializer settings here
config.Services.Replace(typeof(IContentNegotiator), new JsonContentNegotiator(jsonFormatter));

JsonContentNegotiator实现：

JsonContentNegotiator implementation:

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"));
    }
}

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