.NET MVC 表主外键关系 JSON 无限循环 方案二（推荐）

   public class JsonResultObject:JsonResult
        {
            private Newtonsoft.Json.JsonSerializerSettings Settings { get; private set; } 
            public JsonResultObject()
            {
                Settings = new Newtonsoft.Json.JsonSerializerSettings
                { 
                    ReferenceLoopHandling = Newtonsoft.Json.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");
                var 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 = Newtonsoft.Json.JsonSerializer.Create(this.Settings);
                using (var sw = new StringWriter())
                {
                    scriptSerializer.Serialize(sw, this.Data);
                    response.Write(sw.ToString());
                }  
            } 
        }