无法隐式转换类型“Newtonsoft.Json.Linq.JObject”

Question

我需要返回一个 json 对象，但出现以下错误：

错误 1 ​​无法将类型“Newtonsoft.Json.Linq.JObject”隐式转换为“System.Collections.Generic.IEnumerable<Newtonsoft.Json.Linq.JObject>”。存在显式转换（您是否缺少演员表？）

谁能帮我解决这个错误？

public static IEnumerable<JObject> GetListOfHotels()
{
    const string dataPath = "https://api.eancdn.com/ean-services/rs/hotel/v3/list?minorRev=99&cid=55505&apiKey=key&customerUserAgent=Google&customerIpAddress=123.456&locale=en_US&currencyCode=USD&destinationString=washington,united+kingdom&supplierCacheTolerance=MED&arrivalDate=12/12/2013&departureDate=12/15/2013&room1=2&mberOfResults=1&supplierCacheTolerance=MED_ENHANCED";
    var request           = WebRequest.Create(dataPath);
    request.Method        = "POST";
    const string postData = dataPath;
    var byteArray         = Encoding.UTF8.GetBytes(postData);
    request.ContentType    = "application/json";
    request.ContentLength  = byteArray.Length;
    var dataStream = request.GetRequestStream();
    dataStream.Write(byteArray, 0, byteArray.Length);
    dataStream.Close();

    var response = request.GetResponse();
    var responseCode = (((HttpWebResponse) response).StatusDescription);

    var responseStream = response.GetResponseStream();

    var responseReader = new StreamReader(responseStream, Encoding.UTF8);
    var responseString = responseReader.ReadToEnd();

    var root = JObject.Parse(responseString);

    return root;
}

Answer 1

问题是您试图返回 a JObject，但由于您的函数的当前签名，编译器假定它需要IEnumerable<JObject>返回。

因此，您需要将函数的签名从期望更改为IEnumerable<JObject>：

public static IEnumerable<JObject> GetListOfHotels()

接受 aJObject代替：

public static JObject GetListOfHotels()