将 CookComputing XMLRpcStruct (IEnumerable<Object>) 转换为实际的 C# 类

Question

所以，我正在使用 CookComputings XMLRPC 库来与 InfusionSoft 交谈（这是一个非常流行的在线 CRM）。主要方法是：

 [XmlRpcMethod("DataService.query")]
 IEnumerable<object> QuerySubscriptionStatus(string apiKey, 
        string table, int limit, int page, 
        IDictionary queryData, string[] selectedFields);

遗憾的是，我需要使用IEnumerable<object>，因为 InfusionSoft XML/RPC API 需要它。我希望不是这样，但很遗憾是这样。

由于我使用 .NET 4.5，我想我可以做一个动态转换：

  var subStatus = proxy.QuerySubscriptionStatus(
      _key, "RecurringOrder", 500, 0, dict, sarray);
  var result = subStatus.Cast<SubscriptionStatus>();

不幸的是，这不起作用，我收到了来自 C# 的一个非常令人沮丧的错误：

无法将“CookComputing.XmlRpc.XmlRpcStruct”类型的对象转换为“WBI.Model.SubscriptionStatus”类型。`

我尝试将我的班级指定为struct；哎呀，我什至尝试使用XMLRpcMember() 标签指定它，但不，它只是不会转换。

如何与IEnumerable 中的数据进行交互？

我尝试过的类/结构类型

public struct SubStatus
{
    public int AffiliateId;
    public int AutoCharge;
    public double BillingAmt;
    public string BillingCycle;
    public int CC1;
    public int CC2;
    public int ContactId;
    public DateTime EndDate;
    public int Frequency;
    public int Id;
    public DateTime LastBillDate;
    public int LeadAffiliateId;
    public int MaxRetry;
    public int MerchantAccountId;
    public DateTime NextBillDate;
    public int NumDaysBetweenRetry;
    public int OriginatingOrderId;
    public DateTime PaidThruDate;
    public int PaymentGatewayId;
    public int ProductId;
    public int ProgramId;
    public string PromoCode;
    public int Qty;
    public string ReasonStopped;
    public int ShippingOptionId;
    public DateTime StartDate;
    public string Status;
    public int SubscriptionPlanId;
}

我还尝试了一个带有XMLRpcMember 标签的简单类：

public class SubscriptionStatus
{
    [XmlRpcMember("AffiliateId")]
    public int AffiliateId { get; set; }
    [XmlRpcMember("AutoCharge")]
    public int AutoCharge { get; set; }
    [XmlRpcMember("BillingAmt")]
    public double BillingAmt { get; set; }
    [XmlRpcMember("BillingCycle")]
    public string BillingCycle { get; set; }
    [XmlRpcMember("CC1")]
    public int CC1 { get; set; }
    [XmlRpcMember("CC2")]
    public int CC2 { get; set; }
    [XmlRpcMember("ContactId")]
    public int ContactId { get; set; }
    [XmlRpcMember("EndDate")]
    public DateTime EndDate { get; set; }
    [XmlRpcMember("Frequency")]
    public int Frequency { get; set; }
    [XmlRpcMember("Id")]
    public int Id { get; set; }
    [XmlRpcMember("LastBillDate")]
    public DateTime LastBillDate { get; set; }
    [XmlRpcMember("LeadAffiliateId")]
    public int LeadAffiliateId { get; set; }
    [XmlRpcMember("MaxRetry")]
    public int MaxRetry { get; set; }
    [XmlRpcMember("MerchantAccountId")]
    public int MerchantAccountId { get; set; }
    [XmlRpcMember("NextBillDate")]
    public DateTime NextBillDate { get; set; }
    [XmlRpcMember("NumDaysBetweenRetry")]
    public int NumDaysBetweenRetry { get; set; }
    [XmlRpcMember("OriginatingOrderId")]
    public int OriginatingOrderId { get; set; }
    [XmlRpcMember("PaidThruDate")]
    public DateTime PaidThruDate { get; set; }
    [XmlRpcMember("PaymentGatewayId")]
    public int PaymentGatewayId { get; set; }
    [XmlRpcMember("ProductId")]
    public int ProductId { get; set; }
    [XmlRpcMember("ProgramId")]
    public int ProgramId { get; set; }
    [XmlRpcMember("PromoCode")]
    public string PromoCode { get; set; }
    [XmlRpcMember("Qty")]
    public int Qty { get; set; }
    [XmlRpcMember("ReasonStopped")]
    public string ReasonStopped { get; set; }
    [XmlRpcMember("ShippingOptionId")]
    public int ShippingOptionId { get; set; }
    [XmlRpcMember("StartDate")]
    public DateTime StartDate { get; set; }
    [XmlRpcMember("Status")]
    public string Status { get; set; }
    [XmlRpcMember("SubscriptionPlanId")]
    public int SubscriptionPlanId { get; set; }
}

Answer 1

因此，在另一位高级开发人员的帮助下，事实证明我们能够对结构进行一些更改：

    private string[] retFlds = { "Id", "ContactId", "OriginatingOrderId", "ProgramId", "SubscriptionPlanId", "ProductId", "StartDate", "NextBillDate", "BillingCycle", "Frequency", "BillingAmt", "Status", "ReasonStopped", "AutoCharge", "CC1", "CC2", "NumDaysBetweenRetry", "MaxRetry", "MerchantAccountId", "AffiliateId", "PromoCode", "LeadAffiliateId", "Qty", "ShippingOptionId" };
    private string table = "RecurringOrder";
    private DataTable dt = new DataTable();
    // here's the query 
    XmlRpcStruct[] retData = proxy.Query(Auth.key, table, 1000, 0, qryData, returnFields);
    dt = StructArrayToDT(retData);

    public static DataTable StructArrayToDT(XmlRpcStruct[] data)
    {
        DataTable dt = new DataTable();
        if (data.Length == 0) { return dt; }

        // do columns
        foreach (DictionaryEntry d in data[0])
        {
            dt.Columns.Add(d.Key.ToString(), typeof(object));
        }

        foreach (XmlRpcStruct xmlstruct in data)
        {
            DataRow dr = dt.NewRow();
            foreach (DictionaryEntry d in xmlstruct)
            {
                try
                {
                    dr[d.Key.ToString()] = d.Value;
                }
                catch (Exception ex)
                { 
                    // handle errors
                }

            }
            dt.Rows.Add(dr);
        }
        return dt;
    }

现在终于可以毫无问题地访问该数据了。

Answer 2

查看 QuerySubscriptionStatus 的签名及其返回的 IEnumerable。如果您再次查看正在实现 IDictionary、ICollection、IEnumerable 的 XmlRpcStruct (Fork of XML.Rpc.Net) 的定义。因此，如果我们假设 QuerySubscriptionStatus 返回实现 IEnumerable 的 XmlRpcStruct ，那么您将获得 Enumeration 作为响应，它本质上是项目的集合（即使它包含单个项目）。您正在尝试将枚举类型转换为不是集合的结构 (SubscriptionStatus)。因此错误。 如果 Enumeration 中包含的项目属于 SubscriptionStatus 结构类型，那么下面的行应该可以解决问题。

var resultList = subStatus.ToList<SubscriptionStatus();

然后遍历 resultList 以访问来自 QuerySubscriptionStatus 方法的响应。

foreach(var result in resultList)
{

}

或者，如果您确定响应列表将只有一个条目，那么您也可以使用以下

var result = resultList.FirstOrDefault();

希望对您有所帮助。