我正在学习Xamarin表单。我正在使用Google Place API for searching nearby
我已经设法在.NET中调用了API，但我只得到了20个结果，因为它是写在Google文档中的。
下面是我的代码：

string lati = location.Latitude.ToString().Replace(",", ".");
string longi = location.Longitude.ToString().Replace(",", ".");

string latitude = lati;
string longitude = longi;
string Myradius = "3000";

var URL = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?";
string urlParameters = "?location=" + latitude + "," + longitude + "&radius=" + Myradius + "&key=My_GOOGLE_KEY";

HttpClient client = new HttpClient();
client.BaseAddress = new Uri(URL);

// Add an Accept header for JSON format.
client.DefaultRequestHeaders.Accept.Add(
new MediaTypeWithQualityHeaderValue("application/json"));

// List data response.
HttpResponseMessage response = await client.GetAsync(urlParameters);

if (response.IsSuccessStatusCode)
{
    JObject joResponse = JObject.Parse(await response.Content.ReadAsStringAsync());

    JArray MyJsonResult = (JArray)joResponse["results"];

    // I want to have the second page result of my API Call
    string token = joResponse["next_page_token"].ToString(); // I have manage to get the token
    JArray MyJsonResult2 = await GetnextPageData(latitude, longitude, Myradius, token); //no result
}

async Task<JArray> GetnextPageData(string latitude, string longitude, string Myradius , string token)
{
    var URL = "https://maps.googleapis.com/maps/api/place/nearbysearch/json?";

    string urlParameters = "?location=" + latitude + "," + longitude + "&radius=" + Myradius + "&key=My_GOOGLE_KEY&pagetoken=" + token;

    HttpClient client = new HttpClient();
    client.BaseAddress = new Uri(URL);

    // Add an Accept header for JSON format.
    client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

    // List data response
    HttpResponseMessage response = await client.GetAsync(urlParameters);
    Console.WriteLine("MyPrint " + response);

    if (response.IsSuccessStatusCode)
    {
        JObject joResponse = JObject.Parse(await response.Content.ReadAsStringAsync());
        Console.WriteLine("MyPrint " + response);

        JArray MyJsonResult = (JArray)joResponse["results"];

        if (MyJsonResult != null)
        {
            return MyJsonResult;
        }
        else
        {
            return null;
        }
    }

    return null;
}

我已经找到了这些链接，但仍然无法为结果的其余部分添加参数：
Obtaining more than 20 results with Google Places API
How to get 20+ result from Google Places API?
问题：我设法获得了令牌，但当我将其放入参数时，没有得到任何结果-MyJsonResult2为空。
当我打印第二个呼叫的“响应”时，我看到了：

StatusCode: 200, ReasonPhrase: 'OK', Version: 1.1, Content: System.Net.Http.NSUrlSessionHandler+NSUrlSessionDataTaskStreamContent, Headers:
{
  server-timing: gfet4t7; dur=30
  Alt-Svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
  Server: scaffolding
  Server: on
  Server: HTTPServer2
  x-xss-protection: 0
  Cache-Control: public, max-age=300
  Date: Sun, 13 Nov 2022 02:19:16 GMT
  X-Frame-Options: SAMEORIGIN
  Vary: Accept-Language
  Content-Type: application/json; charset=UTF-8
  server-timing: gfet4t7; dur=30
  Alt-Svc: h3=":443"; ma=2592000,h3-29=":443"; ma=2592000,h3-Q050=":443"; ma=2592000,h3-Q046=":443"; ma=2592000,h3-Q043=":443"; ma=2592000,quic=":443"; ma=2592000; v="46,43"
  Content-Encoding: gzip
  x-xss-protection: 0
  Expires: Sun, 13 Nov 2022 02:24:16 GMT
  Content-Length: 86
  X-Frame-Options: SAMEORIGIN
}

当我为第二个调用打印“joResponse”时，我得到了以下内容：

{
  "html_attributions": [],
  "results": [],
  "status": "INVALID_REQUEST"
}

谢谢你的帮助。