c# - 将返回类型转换为数组 C#

Question

我有一个 ts 返回数组的方法。我遇到了一个无法将返回类型转换为数组的类的问题。

这是我的方法:

      public Model.BaseType[] returnPayment_Gateway()
    {
        IncomingWebRequestContext request = WebOperationContext.Current.IncomingRequest;
        WebHeaderCollection headers = request.Headers;
        var settings = new DataContractJsonSerializerSettings { EmitTypeInformation = EmitTypeInformation.Never };

        MemoryStream stream1 = new MemoryStream();

        DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(Model.BaseType),settings);

        Model.Payment_Gateway[] allRecords = null;


        if (headers["ServiceAuthentication"] != null)
        {
         string   ServiceAuthentication = headers["ServiceAuthentication"].ToString();
          bool  serviceAuth = Service_Authentication(ServiceAuthentication);

          DAL.DataManager dal = new DAL.DataManager();

            if (serviceAuth == true)
            {
               allRecords = dal.Get_Payment_Gateway();

            }
        }

        else
        {


               // Create a new customer to return


            return new Model.ReturnResponse() { StatusCode = 201, StatusDescription = "Authentication Fails" };


        }

        return allRecords;
    }

我的问题在其他部分，不确定如何将 Model.ReturnResponse() 转换为数组，现在我收到此错误:

不能将类型 ReturnResponse 隐式转换为 Model.BaseType[]

如果您想看我的 3 个类(class):

这是基类:

[Serializable]
[DataContract]
[KnownType(typeof(Payment_Gateway))]
[KnownType(typeof(ReturnResponse))]

public class BaseType 
{

}

这是 Payment_Gateway 类:

[DataContract]
public class Payment_Gateway:BaseType
{
    [DataMember]
    public int Payment_Gateway_ID { get; set; }

    [DataMember]
    public string Payment_Gateway_Name { get; set; }

    [DataMember]
    public string Payment_Gateway_URL { get; set; }

    [DataMember]
    public string Payment_Gateway_Description { get; set; }

这是 ReturnResponse 类:

[DataContract]
public class ReturnResponse:BaseType
{
    [DataMember]
    public int StatusCode { get; set; }

    [DataMember]
    public string StatusDescription { get; set; }


}

Answer 1

而不是尝试返回单个 ReturnResponse:

return new Model.ReturnResponse()
    { StatusCode = 201, StatusDescription = "Authentication Fails" };

返回一个数组，其中包含单个元素，因为这是您的方法应返回的内容:

return new[] {
    new Model.ReturnResponse()
        { StatusCode = 201, StatusDescription = "Authentication Fails" }
    }