将 ArrayPool 对象提供给 JsonOutputFormatter 构造函数 [英] Provide ArrayPool object to JsonOutputFormatter constructor

问题描述

从 .net RC2 升级到 RTM 后，我发现我需要向派生自 ArrayPool 的 JsonOutputFormatter 构造函数提供一个参数.我如何获得这个对象?我手动新建 JsonOutputFormatter 因为我需要配置 ReferenceLoopHandling.

After upgrading from .net RC2 to RTM I find I need to supply a parameter to a constructor of JsonOutputFormatter that derives from ArrayPool. How do I get this object? I am newing JsonOutputFormatter manually because I need to configure ReferenceLoopHandling.

我只能找到其他相关信息:https://github.com/aspnet/Mvc/issues/4562

Only other related info I could find is this: https://github.com/aspnet/Mvc/issues/4562

    public IServiceProvider ConfigureServices(IServiceCollection services)
    {
        // Add framework services.
        services.AddMemoryCache();
        services.AddSession();
        services.AddMvc();
        var formatterSettings = JsonSerializerSettingsProvider.CreateSerializerSettings();
        formatterSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
        JsonOutputFormatter formatter = new JsonOutputFormatter(formatterSettings, ???);

        services.Configure<MvcOptions>(options =>
        {
            options.OutputFormatters.RemoveType<JsonOutputFormatter>();
            options.OutputFormatters.Insert(0, formatter);
        });

        //etc...
    }    

推荐答案

var formatter = new JsonOutputFormatter(formatterSettings, ArrayPool<Char>.Shared);

来源

在评论中:

JsonOutputFormatter 现在在创建它时需要一个 ArrayPool，你可以传入ArrayPool.Shared.

The JsonOutputFormatter now needs a ArrayPool when creating it, you can pass in ArrayPool.Shared.

我还注意到 ArrayPool 上有一个 .Create() 方法.

I also noticed there is a .Create() method on ArrayPool.

var formatter = new JsonOutputFormatter(formatterSettings, ArrayPool<Char>.Create());

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