.net mvc web api 返回 json 内容时,好多属性为null的没必要下发。
下面看下怎么过滤值为null的属性
1.响应内容(过滤前)
{"msg":"初始化成功!","code":"","success":true,data:null}
2.响应内容(过滤后)
{"msg":"初始化成功!","code":"","success":true}
using System.Net.Http.Formatting;
using System.Web.Http;
namespace xxxxxxx
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
......
//默认返回 json
GlobalConfiguration.Configuration.Formatters
.JsonFormatter.MediaTypeMappings.Add(
new QueryStringMapping("datatype", "json", "application/json"));
//返回格式选择
GlobalConfiguration.Configuration.Formatters
.XmlFormatter.MediaTypeMappings.Add(
new QueryStringMapping("datatype", "xml", "application/xml"));
//json 序列化设置
GlobalConfiguration.Configuration.Formatters
.JsonFormatter.SerializerSettings = new Newtonsoft.Json.JsonSerializerSettings()
{
NullValueHandling = Newtonsoft.Json.NullValueHandling.Ignore //设置忽略值为 null 的属性
};
}
}
}