Question

我正在使用ASP.NET web api。为了为端点返回的属性提供驼峰大小写的支持，我添加了以下代码：

//Support camel casing
            var jsonFormatter = config.Formatters.OfType<JsonMediaTypeFormatter>().FirstOrDefault();
            jsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();

这工作正常，但我想为其中一个端点添加一个例外。这将确保从该终点返回数据时，属性不是骆驼。如何添加此例外或单个端点？

Answer 1

如果您应用全局camel case configuration，则无法控制 AFAK实现此目的的唯一方法是使用ActionFilterAttribute 类似于以下内容

public class CamelCasingFilterAttribute:ActionFilterAttribute
    {
        private JsonMediaTypeFormatter _camelCasingFormatter = new JsonMediaTypeFormatter();

        public CamelCasingFilterAttribute()
        {
            _camelCasingFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
        }

        public override void OnActionExecuted(HttpActionExecutedContext actionExecutedContext)
        {
            ObjectContent content = actionExecutedContext.Response.Content as ObjectContent;
            if (content != null)
            {
                if (content.Formatter is JsonMediaTypeFormatter)
                {
                    actionExecutedContext.Response.Content = new ObjectContent(content.ObjectType, content.Value, _camelCasingFormatter);
                }
            }
        }
    }



  public class ValuesController : ApiController
    {
        // GET api/values
        [CamelCasingFilter]
        public IEnumerable<Test> Get()
        {
            return new Test[] {new Test() {Prop1 = "123", Prop2 = "3ERr"}, new Test() {Prop1 = "123", Prop2 = "3ERr"}};  
        }

        // GET api/values/5

        public Test Get(int id)
        {

            return new Test() {Prop1 = "123", Prop2 = "3ERr"};  
        }
    }

    public class Test
    {
        public string Prop1 { get; set; }
        public string Prop2 { get; set; }
    }

如果您尝试调用第一个操作，则答案将如下所示

[{"prop1":"123","prop2":"3ERr"},{"prop1":"123","prop2":"3ERr"}]

并且对于没有过滤器的第二个动作，你会得到类似这样的东西

{
    "prop1": "123",
    "prop2": "3ERr"
}

注意如果您希望在整个控制器上轻松控制camelCase，请尝试将您希望它的操作发送回控制器中的非CamelCase，但是，如果需要，其余的在控制器级别应用此过滤器。更多您应该删除GlobalConfiguration以获取此

ASP.NET WEB API - CamelCasePropertyNamesContractResolver - 强制忽略特定端点

1 个答案: