Newtonsoft.Json.JsonSerializationException:“Self referencing loop detected for property 'DeviceInfo' with type 'FireControl2.Models.DeviceInfoSet'. Path 'DataSet[0]'.”

Question

User1849955458 posted

公共无效ConfigureServices（IServiceCollection服务）
{
services.Configure <CookiePolicyOptions>（选项=>
{
// 这拉姆达给确定定请求是否需要用户
同意非必要cookie.options.CheckConsentNeeded =上下文=>真;
options.MinimumSameSitePolicy = SameSiteMode.None;
}）;

.services.AddMvc（）SetCompatibilityVersion（CompatibilityVersion.Version_2_1）;

services.AddMvc（）。AddJsonOptions（options => options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore）;

services.AddSignalR（）;

}

Answer 1

User-1225169881 posted

HI, 

please try doing this in   Startup.cs 

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc().AddJsonOptions(options => {
        options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
        options.SerializerSettings.ReferenceLoopHandling = ReferenceLoopHandling.Ignore;
    });
    services.AddEntityFramework().AddSqlServer().AddDbContext<IvoryPacketDbContext>(
        options => options.UseSqlServer(Configuration["Data:DefaultConnection:ConnectionString"])
    );
}

Answer 2

User-854763662 posted

Hi laolaolulu ,

Try to add decorate attributes on model class to control the serialization behavior on model or property level. To ignore the property:

[JsonIgnore] 
[IgnoreDataMember] 

JsonIgnore is for JSON.NET and IgnoreDataMember is for XmlDCSerializer.  Reference : https://stackoverflow.com/a/18223985/10201850 

Best Regards ,

Sherry