我有一個來自 REST 呼叫的以下 XML 回應示例
<GetHelloWorldResponse xmlns="http://www.helloworld.com/Services/HelloWorld">
<Available xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
<Pool>
<GameNumber>3081</GameNumber>
<PoolDate>2022-04-20</PoolDate>
<Category>MW</Category>
<ScheduledCloseDate>2022-04-20T13:00:00</ScheduledCloseDate>
<MinAllowedAST>2022-04-20T00:00:00</MinAllowedAST>
<MaxAllowedAST>2022-04-20T23:59:00</MaxAllowedAST>
<Randomised>false</Randomised>
<Pool xmlns:a="http://www.helloworld.com/Services/Common">
<a:PoolId>10089269</a:PoolId>
<a:RaceId>0</a:RaceId>
<a:FixtureSeq>0</a:FixtureSeq>
<a:RaceNum>0</a:RaceNum>
<a:PoolType>FN</a:PoolType>
<a:PoolStatus>CLOSED</a:PoolStatus>
<a:PayPlacesCount>0</a:PayPlacesCount>
<a:OverrideClosedInd>true</a:OverrideClosedInd>
我有這個類來設定屬性：
public class PoolDetails
{
public string GameNumber { get; set; }
public string PoolDate { get; set; }
public string Category { get; set; }
public string ScheduledCloseDate { get; set; }
public string MinAllowedAST { get; set; }
public string MaxAllowedAST { get; set; }
public IEnumerable<AdditionalPoolDetails> AdditionalPoolDetails { get; set; }
}
public class AdditionalPoolDetails
{
public string PoolId { get; set; }
public string PoolType { get; set; }
public string PoolStatus { get; set; }
}
現在我有這個類來選擇值：
XDocument xdoc = XDocument.Parse(GetResponseContent(response));
XNamespace xmlnsa = "http://www.helloworld.com/Services/HelloWorld";
XNamespace xmlnsb = "http://www.helloworld.com/Services/Common";
IEnumerable<XElement> available = from xml in xdoc.Descendants(xmlnsa "Available") select xml;
IEnumerable<PoolDetails> poolDetails =
from s in available.Descendants(xmlnsa "Pool")
select new PoolDetails()
{
GameNumber = (string)s.Element(xmlnsa "GameNumber"),
PoolDate = (string)s.Element(xmlnsa "PoolDate"),
Category = (string)s.Element(xmlnsa "Category"),
ScheduledCloseDate = (string)s.Element(xmlnsa "ScheduledCloseDate"),
MinAllowedAST = (string)s.Element(xmlnsa "MinAllowedAST"),
MaxAllowedAST = (string)s.Element(xmlnsa "MaxAllowedAST"),
AdditionalPoolDetails = from t in s.Descendants(xmlnsa "Pool")
select new AdditionalPoolDetails()
{
PoolId = (string)s.Element(xmlnsb "PoolId"),
PoolType = (string)s.Element(xmlnsb "PoolType"),
PoolStatus = (string)s.Element(xmlnsb "PoolStatus")
}
}
;
出于某種原因，IEnumerable AdditionalPoolDetails (PoolId, PoolType, PoolStatus) 都回傳 null。任何人都可以幫忙嗎？:)
uj5u.com熱心網友回復：
您必須在最后一次選擇中s替換為。t此外，最好不要強制Element轉換為string，而是訪問其Value屬性。
AdditionalPoolDetails = from t in s.Descendants(xmlnsa "Pool")
select new AdditionalPoolDetails()
{
PoolId = t.Element(xmlnsb "PoolId")?.Value,
PoolType = t.Element(xmlnsb "PoolType")?.Value,
PoolStatus = t.Element(xmlnsb "PoolStatus")?.Value
}
uj5u.com熱心網友回復：
您可以使用標準的序列化
void Main()
{
string str = "<GetHelloWorldResponse xmlns=\"http://www.helloworld.com/Services/HelloWorld\"><Available xmlns:i=\"http://www.w3.org/2001/XMLSchema-instance\"><Pool><GameNumber>3081</GameNumber><PoolDate>2022-04-20</PoolDate><Category>MW</Category><ScheduledCloseDate>2022-04-20T13:00:00</ScheduledCloseDate><MinAllowedAST>2022-04-20T00:00:00</MinAllowedAST><MaxAllowedAST>2022-04-20T23:59:00</MaxAllowedAST><Randomised>false</Randomised><Pool xmlns:a=\"http://www.helloworld.com/Services/Common\"><a:PoolId>10089269</a:PoolId><a:RaceId>0</a:RaceId><a:FixtureSeq>0</a:FixtureSeq><a:RaceNum>0</a:RaceNum><a:PoolType>FN</a:PoolType><a:PoolStatus>CLOSED</a:PoolStatus><a:PayPlacesCount>0</a:PayPlacesCount><a:OverrideClosedInd>true</a:OverrideClosedInd></Pool></Pool></Available></GetHelloWorldResponse>";
XDocument xDoc = XDocument.Parse(str);
var xns = new System.Xml.Serialization.XmlSerializerNamespaces();
xns.Add("", "http://www.helloworld.com/Services/HelloWorld");
xns.Add("a", "http://www.helloworld.com/Services/Common");
System.Xml.Serialization.XmlSerializer serializer = new System.Xml.Serialization.XmlSerializer(typeof(GetHelloWorldResponse));
GetHelloWorldResponse a = serializer.Deserialize(xDoc.Root.CreateReader()) as GetHelloWorldResponse;
a.Dump();
}
public static class Ext
{
public static T Deserialize<T>(String aXml)
{
T obj = Activator.CreateInstance<T>();
using (MemoryStream ms = new MemoryStream(Encoding.UTF8.GetBytes(aXml.Replace("\\", ""))))
{
try
{
XmlReader objXR = new XmlTextReader(ms);
XmlSerializer serializer = new XmlSerializer(obj.GetType());
obj = (T)serializer.Deserialize(objXR);
}
catch (InvalidOperationException ioex)
{
string sSource;
string sLog;
string sEvent;
sSource = "News Feed";
sLog = "Application";
sEvent = "Deserialize(): An error occured while deserializing an XML feed file. " ioex.Message;
if (!EventLog.SourceExists(sSource))
{
EventLog.CreateEventSource(sSource, sLog);
}
EventLog.WriteEntry(sSource, sEvent, EventLogEntryType.Warning);
}
return obj;
}
}
}
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.helloworld.com/Services/HelloWorld")]
[System.Xml.Serialization.XmlRootAttribute(Namespace = "http://www.helloworld.com/Services/HelloWorld", IsNullable = false)]
public partial class GetHelloWorldResponse
{
public GetHelloWorldResponseAvailable Available {get;set;}
}
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.helloworld.com/Services/HelloWorld")]
public partial class GetHelloWorldResponseAvailable
{
public GetHelloWorldResponseAvailablePool Pool {get;set;}
}
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.helloworld.com/Services/HelloWorld")]
public partial class GetHelloWorldResponseAvailablePool
{
public ushort GameNumber {get;set;}
[System.Xml.Serialization.XmlElementAttribute(DataType = "date")]
public System.DateTime PoolDate {get;set;}
public string Category {get;set;}
public System.DateTime ScheduledCloseDate {get;set;}
public System.DateTime MinAllowedAST {get;set;}
public System.DateTime MaxAllowedAST {get;set;}
public bool Randomised {get;set;}
public GetHelloWorldResponseAvailablePoolPool Pool {get;set;}
}
[System.Xml.Serialization.XmlTypeAttribute(AnonymousType = true, Namespace = "http://www.helloworld.com/Services/HelloWorld")]
public partial class GetHelloWorldResponseAvailablePoolPool
{
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public uint PoolId {get;set;}
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public byte RaceId {get;set;}
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public byte FixtureSeq {get;set;}
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public byte RaceNum {get;set;}
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public string PoolType {get;set;}
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public string PoolStatus {get;set;}
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public byte PayPlacesCount {get;set;}
[System.Xml.Serialization.XmlElementAttribute(Namespace = "http://www.helloworld.com/Services/Common")]
public bool OverrideClosedInd {get;set;}
}
public class AdditionalPoolDetails
{
public string PoolId { get; set; }
public string PoolType { get; set; }
public string PoolStatus { get; set; }
}
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