將類實現從asp.net mvc移植到asp.net mvc核心

Question

我試圖實現ActionResult的子類，該子類將通過REST API流式傳輸大的JSON對象，我在堆棧溢出時發現了該解決方案，但似乎是asp.net MVC的實現。

public class JsonStreamingResult : ActionResult
{
    private IEnumerable itemsToSerialize;

    public JsonStreamingResult(IEnumerable itemsToSerialize)
    {
        this.itemsToSerialize = itemsToSerialize;
    }

    public override void ExecuteResult(ActionContext context)
    {
        var response = context.HttpContext.Response;
        response.ContentType = "application/json";
        response.ContentEncoding = Encoding.UTF8;

        JsonSerializer serializer = new JsonSerializer();

        using (StreamWriter sw = new StreamWriter(response.OutputStream))
        using (JsonTextWriter writer = new JsonTextWriter(sw))
        {
            writer.WriteStartArray();
            foreach (object item in itemsToSerialize)
            {
                JObject obj = JObject.FromObject(item, serializer);
                obj.WriteTo(writer);
                writer.Flush();
            }
            writer.WriteEndArray();
        }
    }
}

但是，當我將其移植到asp.net核心MVC的過程中，我發現響應類沒有ContentEncoding和OutputStream屬性。

請，有人可以提供所需的更改以將該類移植到asp.net core嗎？

提前致謝。

Answer 1

OutputStream-在ASP.NET Core HttpResponse包含可以向其寫入響應的Body屬性。 ContentEncoding-設置StreamWriter編碼，因為您將結果手動寫入響應流。 在ASP.NET MVC HttpResponse.ContentEncoding當你打電話只用於HttpResponse.Write方法。

public class JsonStreamingResult : ActionResult
{
    private IEnumerable itemsToSerialize;

    public JsonStreamingResult(IEnumerable itemsToSerialize)
    {
        this.itemsToSerialize = itemsToSerialize;
    }

    public override void ExecuteResult(ActionContext context)
    {
        var response = context.HttpContext.Response;
        response.ContentType = "application/json";

        JsonSerializer serializer = new JsonSerializer();

        using (StreamWriter sw = new StreamWriter(response.Body, Encoding.UTF8))
        using (JsonTextWriter writer = new JsonTextWriter(sw))
        {
            writer.WriteStartArray();
            foreach (object item in itemsToSerialize)
            {
                JObject obj = JObject.FromObject(item, serializer);
                obj.WriteTo(writer);
                writer.Flush();
            }
            writer.WriteEndArray();
        }
    }
}

更新資料

根據源代碼 ， JsonResultExecutor內部完全按照我的描述進行操作，只是區別在於它解析ContentType編碼。