1..Net开源Json序列化工具Newtonsoft.Json中提供了解决序列化的循环引用问题：
方式1：指定Json序列化配置为 ReferenceLoopHandling.Ignore
方式2：指定 JsonIgnore忽略 引用对象
实例1，解决MVC的Json序列化引用方法：
step1:在项目上添加引用 Newtonsoft.Json程序包，命令：Insert-Package Newtonsoft.Json
step2:在项目中添加一个类，继承JsonResult，代码如下：
/// <summary>/// 继承JsonResut，重写序列化方式/// </summary>public class JsonNetResult : JsonResult{ ???public JsonSerializerSettings Settings { get; private set; } ???public JsonNetResult() ???{ ???????Settings = new JsonSerializerSettings ???????{ ???????????//这句是解决问题的关键,也就是json.net官方给出的解决配置选项. ????????????????????????????ReferenceLoopHandling = ReferenceLoopHandling.Ignore ???????}; ???} ???public override void ExecuteResult(ControllerContext context) ???{ ???????if (context == null) ???????????throw new ArgumentNullException("context"); ???????if (this.JsonRequestBehavior == JsonRequestBehavior.DenyGet && string.Equals(context.HttpContext.Request.HttpMethod, "GET", StringComparison.OrdinalIgnoreCase)) ???????????throw new InvalidOperationException("JSON GET is not allowed"); ???????HttpResponseBase response = context.HttpContext.Response; ???????response.ContentType = string.IsNullOrEmpty(this.ContentType) ? "application/json" : this.ContentType; ???????if (this.ContentEncoding != null) ???????????response.ContentEncoding = this.ContentEncoding; ???????if (this.Data == null) ???????????return; ???????var scriptSerializer = JsonSerializer.Create(this.Settings); ???????using (var sw = new StringWriter()) ???????{ ???????????scriptSerializer.Serialize(sw, this.Data); ???????????response.Write(sw.ToString()); ???????} ???}}step3:在项目添加BaseController，重写Json()方法，代码如下：
public class BaseController : Controller{ ???public StudentContext _Context = new StudentContext(); ???/// <summary> ???/// 重写，Json方法，使之返回JsonNetResult类型 ???/// </summary> ???protected override JsonResult Json(object data, string contentType, ???????Encoding contentEncoding, JsonRequestBehavior behavior) ???{ ???????return new JsonNetResult ???????{ ???????????Data = data, ???????????ContentType = contentType, ???????????ContentEncoding = contentEncoding, ???????????JsonRequestBehavior = behavior ???????}; ???}}step4.向平时一样使用就可以了
//获取列表public JsonResult GetList(){ ???List<student> list = _Context.students.Where(q => q.sno == "103").ToList(); ???//方法1 ???return Json(list); ???//方法2 ???//return new JsonNetResult() { ???// ???Data=list ???//};}获取的结果，说明，这种方式指定忽略循环引用，是在指定循环级数后忽略，返回的json数据中还是有部分循环的数据
解决EF Json序列化循环引用方法2，在指定的关联对象上，添加JsonIgnore 方法注释
[JsonIgnore]public virtual ICollection<score> scores { get; set; }返回结果中，没有关联表数据
解决MVC Json序列化的循环引用问题/EF Json序列化循引用问题---Newtonsoft.Json
原文地址：https://www.cnblogs.com/mingjing/p/10698804.html