ASP.NET MVC 碰到JSON轮回挪用的题目应当怎样处理？【C#.Net教程】,javascript,ASP.NET,JSON,解决,用的,循环

1..Net开源Json序列化东西Newtonsoft.Json中供应了处理序列化的轮回援用题目：

体式格局1：指定Json序列化设置为 ReferenceLoopHandling.Ignore

体式格局2：指定 JsonIgnore疏忽 援用对象

实例1，处理MVC的Json序列化援用要领：

step1:在项目上增加援用 Newtonsoft.Json程序包，敕令：Insert-Package Newtonsoft.Json

step2:在项目中增加一个类，继续JsonResult，代码以下：

/// <summary>/// 继续JsonResut，重写序列化体式格局/// </summary>public class JsonNetResult : JsonResult
{public JsonSerializerSettings Settings { get; private set; }public JsonNetResult()
    {
        Settings = new JsonSerializerSettings
        {//这句是处理题目的症结,也就是json.net官方给出的处理设置选项.                 
            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:在项目增加BaseController，重写Json()要领，代码以下：

public class BaseController : Controller
{public StudentContext _Context = new StudentContext();/// <summary>/// 重写，Json要领，使之返回JsonNetResult范例/// </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.向日常平凡一样运用就能够了

//猎取列表public JsonResult GetList()
{
    List<student> list = _Context.students.Where(q => q.sno == "103").ToList();//要领1return Json(list);//要领2//return new JsonNetResult() {//    Data=list//};
}

猎取的效果，申明，这类体式格局指定疏忽轮回援用，是在指定轮回级数后疏忽，返回的json数据中照样有部份轮回的数据

处理EF Json序列化轮回援用要领2，在指定的关联对象上，增加JsonIgnore 要领解释

[JsonIgnore]public virtual ICollection<score> scores { get; set; }

返回效果中，没有关联表数据

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