返回多个Json响应

问题描述

我已经构建了此API，该API从Google place API返回JSON响应以将其存储/保存到数据库，并且如该代码示例所示，它是PlaceId的列表，因此我编写了一个For循环来循环每个PlaceId并返回它们然后到下一步将它们发布到数据库中，

    public class portal_teilnehmerController : ControllerBase
{
    private readonly _0046696KContext _context;
    private const string apiKey = @"apiKey";
    private const string fields = "&fields=address_component,rating,reviews,user_ratings_total,website";
    WebRequest request;
    WebResponse response;
    Stream data;
    StreamReader reader;
    private Task<string> responseFromServer;
    private string[] JsonResponses = { };

    public portal_teilnehmerController(_0046696KContext context)
    {
        _context = context;
    }
    [HttpGet]
    [Produces("application/json")]
    public async Task<JsonResult> Getportal_teilnehmerByPlaceId()
    {
        var PlaceId = await _context.portal_teilnehmer.Select(x => x.PlaceId).ToListAsync();

        if (PlaceId == null)
        {
            throw new InvalidOperationException("This Portal ID not found,please be assure of your portal ID");
        }

        for (int i = 0; i < PlaceId.Count(); i++)
        {

            string url = @"https://maps.googleapis.com/maps/api/place/details/json?place_id=" + (PlaceId[i]) + (fields) + (apiKey);

            request = WebRequest.Create(url);

            response = await request.GetResponseAsync();

            data = response.GetResponseStream();

            reader = new StreamReader(data);

            string timeStamp = GetTimestamp(DateTime.Now);

            responseFromServer = reader.ReadToEndAsync();
        }
        return new JsonResult(await responseFromServer);
    }

但是当我测试时会发生什么，它只是返回For循环的最后一个PlaceId响应。关于如何将它们全部返回到数组并保存的任何想法？

解决方法

关于如何将它们全部返回到数组并保存的任何想法吗？

使用列表可能更容易：

    var responsesFromServer = new List<string>();
    //^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    for (int i = 0; i < PlaceId.Count(); i++)
    {

        string url = @"https://maps.googleapis.com/maps/api/place/details/json?place_id=" + (PlaceId[i]) + (fields) + (apiKey);

        request = WebRequest.Create(url);

        response = await request.GetResponseAsync();

        data = response.GetResponseStream();

        reader = new StreamReader(data);

        string timeStamp = GetTimestamp(DateTime.Now);

        responsesFromServer.Add(await reader.ReadToEndAsync());
        //      ^          ^^^^^^^^^^                        ^
    }
    return new JsonResult(responsesFromServer);
    //                            ^

用尖号加下划线的新位^

但是，我想您可以使用一个数组。毕竟，您确实知道要下载多少个地方。

    var responsesFromServer = new string[PlaceId.Count()];
    for (int i = 0; i < PlaceId.Count(); i++)
    {
        ...
        responsesFromServer[i] = await reader.ReadToEndAsync();
    }
    return new JsonResult(responsesFromServer);

c#c#google-places-api json