[.net Core] 解決傳回JSON 時recursion 問題

之前在Java 遇過同樣問題, 解決方案是在getter 中加入annotation. 而在.net core 中, 則需要透過修改startup().

在Startup.cs 中修改ConfigureService() 如下便可:

public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc().AddJsonOptions(options =>
            {
                options.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
                options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
            }).SetCompatibilityVersion(CompatibilityVersion.Version_2_2);
        }