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 == "").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
相关文章:
Newtonsoft.Json简介:http://blog.csdn.net/u011127019/article/details/51706619
EF的Json序列化,循环引用:http://blog.csdn.net/u011127019/article/details/51706659