我有一个包含几组数据的xdocument，我希望能够为特定的xs：element选择数据。
例如我有这段代码：
// get xml string
var xmlResponse = _traineeCommands.GetTraineeDetails(personId.ToString());
// parse to xdocument
var doc = XDocument.Parse(xmlResponse);
// select specific element and children
var traineeDetails = doc.Descendants("xs:element")
.Select(x => (string) x.Attribute("name") == "TraineeDetails");
这是我的堆栈跟踪：
{
"Message": "An error has occurred.",
"ExceptionMessage": "The ':' character, hexadecimal value 0x3A, cannot be included in a name.",
"ExceptionType": "System.Xml.XmlException",
"StackTrace": " at System.Xml.XmlConvert.VerifyNCName(String name, ExceptionType exceptionType)\r\n at System.Xml.Linq.XName..ctor(XNamespace ns, String localName)\r\n at System.Xml.Linq.XNamespace.GetName(String localName)\r\n at IceServices.IpdApi.Controllers.JobController.GetTraineeDetailsForIpd(Int32 personId) in C:\\Users\\GOWDY_N\\Source\\Repos\\IceServices\\IceServices.IpdApi\\Controllers\\JobController.cs:line 134\r\n at IceServices.IpdApi.Controllers.JobController.<Get>d__6.MoveNext() in C:\\Users\\GOWDY_N\\Source\\Repos\\IceServices\\IceServices.IpdApi\\Controllers\\JobController.cs:line 66\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Threading.Tasks.TaskHelpersExtensions.<CastToObject>d__3`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()"
}
这是整个xml：
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope
xmlns:soap="http://www.w3.org/2003/05/soap-envelope"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<GetIPDTraineeDetailsResponse
xmlns="http://iris.co.uk/">
<GetIPDTraineeDetailsResult>
<xs:schema id="NewDataSet"
xmlns=""
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:UseCurrentLocale="true">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="TraineeDetails">
<xs:complexType>
<xs:sequence>
<xs:element name="ID" type="xs:decimal" minOccurs="0" />
<xs:element name="TRAINEE_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="ORG_REGISTRATION_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="TRAINING_SCHEME_TITLE" type="xs:string" minOccurs="0" />
<xs:element name="SELF_MANAGED" type="xs:decimal" minOccurs="0" />
<xs:element name="TRAINING_START_DATE" type="xs:string" minOccurs="0" />
<xs:element name="ANNUAL_REVIEW_STATUS" type="xs:string" minOccurs="0" />
<xs:element name="SCE_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="SCE_FORENAME" type="xs:string" minOccurs="0" />
<xs:element name="SCE_SURNAME" type="xs:string" minOccurs="0" />
<xs:element name="SCE_NAME" type="xs:string" minOccurs="0" />
<xs:element name="DE_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="DE_NAME" type="xs:string" minOccurs="0" />
<xs:element name="DE_PERSON_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="DE_FORENAMES" type="xs:string" minOccurs="0" />
<xs:element name="DE_FORENAME" type="xs:string" minOccurs="0" />
<xs:element name="DE_SURNAME" type="xs:string" minOccurs="0" />
<xs:element name="DE_EMAIL_ADDRESS" type="xs:string" minOccurs="0" />
<xs:element name="MENTOR_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="MENTOR_FORENAME" type="xs:string" minOccurs="0" />
<xs:element name="MENTOR_SURNAME" type="xs:string" minOccurs="0" />
<xs:element name="MENTOR_NAME" type="xs:string" minOccurs="0" />
<xs:element name="MENTOR_EMAIL" type="xs:string" minOccurs="0" />
<xs:element name="MENTOR_PERSONID" type="xs:decimal" minOccurs="0" />
<xs:element name="SELECTED_LEVEL" type="xs:string" minOccurs="0" />
<xs:element name="SELECTED_LEVEL_DESCRIPTION" type="xs:string" minOccurs="0" />
<xs:element name="TRAINEE_STATUS" type="xs:string" minOccurs="0" />
<xs:element name="TRAINEE_STATUS_DESCR" type="xs:string" minOccurs="0" />
<xs:element name="REQUESTED_DE_PERSON_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="REQUESTED_DE_SURNAME" type="xs:string" minOccurs="0" />
<xs:element name="REQUESTED_DE_FORENAME" type="xs:string" minOccurs="0" />
<xs:element name="PENDING_DE_EMAIL" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="PersonDetails">
<xs:complexType>
<xs:sequence>
<xs:element name="ID" type="xs:decimal" minOccurs="0" />
<xs:element name="FORENAMES" type="xs:string" minOccurs="0" />
<xs:element name="FORENAME" type="xs:string" minOccurs="0" />
<xs:element name="SURNAME" type="xs:string" minOccurs="0" />
<xs:element name="DOB" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_NAME" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_ADDRESS_1" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_ADDRESS_2" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_ADDRESS_3" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_TOWN" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_STATE" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_COUNTRY" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYER_POSTCODE" type="xs:string" minOccurs="0" />
<xs:element name="REASON_NOT_WORKING" type="xs:string" minOccurs="0" />
<xs:element name="IPD_STATUS" type="xs:decimal" minOccurs="0" />
<xs:element name="PAYMENT_RECEIVED" type="xs:decimal" minOccurs="0" />
<xs:element name="SM_PRODUCT_DESC" type="xs:string" minOccurs="0" />
<xs:element name="SM_PRODUCT_PRICE" type="xs:decimal" minOccurs="0" />
<xs:element name="ORIGINAL_TRAINING_START_DATE" type="xs:string" minOccurs="0" />
<xs:element name="REVIEW_DATE" type="xs:string" minOccurs="0" />
<xs:element name="TRANSFER_DATE" type="xs:string" minOccurs="0" />
<xs:element name="ELIGIBLE_LEVEL" type="xs:string" minOccurs="0" />
<xs:element name="ELIGIBLE_LEVEL_DESCRIPTION" type="xs:string" minOccurs="0" />
<xs:element name="DEFAULT_LEVEL" type="xs:string" minOccurs="0" />
<xs:element name="DEFAULT_LEVEL_DESCRIPTION" type="xs:string" minOccurs="0" />
<xs:element name="PERSON_AIM" type="xs:string" minOccurs="0" />
<xs:element name="EMPLOYEE_NUMBER" type="xs:string" minOccurs="0" />
<xs:element name="IPD_SIGNUP_DATE" type="xs:string" minOccurs="0" />
<xs:element name="REQUESTED_MENTOR_PERSON_ID" type="xs:decimal" minOccurs="0" />
<xs:element name="REQUESTED_MENTOR_SURNAME" type="xs:string" minOccurs="0" />
<xs:element name="REQUESTED_MENTOR_FORENAME" type="xs:string" minOccurs="0" />
<xs:element name="PENDING_MENTOR_EMAIL" type="xs:string" minOccurs="0" />
<xs:element name="PENDING_AIM" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
<diffgr:diffgram
xmlns:msdata="urn:schemas-microsoft-com:xml-msdata"
xmlns:diffgr="urn:schemas-microsoft-com:xml-diffgram-v1">
<NewDataSet
xmlns="">
<TraineeDetails diffgr:id="TraineeDetails1" msdata:rowOrder="0">
<ID>40798297</ID>
<SELF_MANAGED>0</SELF_MANAGED>
</TraineeDetails>
<PersonDetails diffgr:id="PersonDetails1" msdata:rowOrder="0">
<ID>40798297</ID>
<FORENAMES>Alan Gibson</FORENAMES>
<FORENAME>Alan</FORENAME>
<SURNAME>Mordey</SURNAME>
<DOB>21/10/1945</DOB>
<EMPLOYER_NAME>Atkins</EMPLOYER_NAME>
<EMPLOYER_ADDRESS_1>The Axis</EMPLOYER_ADDRESS_1>
<EMPLOYER_ADDRESS_2>10 Holliday Street</EMPLOYER_ADDRESS_2>
<EMPLOYER_TOWN>BIRMINGHAM</EMPLOYER_TOWN>
<EMPLOYER_STATE>West Midlands</EMPLOYER_STATE>
<EMPLOYER_COUNTRY>UK</EMPLOYER_COUNTRY>
<EMPLOYER_POSTCODE>B1 1TF</EMPLOYER_POSTCODE>
<IPD_STATUS>0</IPD_STATUS>
<PAYMENT_RECEIVED>0</PAYMENT_RECEIVED>
<SM_PRODUCT_DESC>Mentor Support Training</SM_PRODUCT_DESC>
<SM_PRODUCT_PRICE>340.75</SM_PRODUCT_PRICE>
<ELIGIBLE_LEVEL>UNK</ELIGIBLE_LEVEL>
<ELIGIBLE_LEVEL_DESCRIPTION>Unknown</ELIGIBLE_LEVEL_DESCRIPTION>
<DEFAULT_LEVEL>ENGTECH</DEFAULT_LEVEL>
<DEFAULT_LEVEL_DESCRIPTION>EngTech</DEFAULT_LEVEL_DESCRIPTION>
<PERSON_AIM>CENG</PERSON_AIM>
</PersonDetails>
</NewDataSet>
</diffgr:diffgram>
</GetIPDTraineeDetailsResult>
</GetIPDTraineeDetailsResponse>
</soap:Body>
</soap:Envelope>
我想在我的模式中选择xs：element TraineeDetails并将数据作为值返回，即IEnumerable of values，在这种情况下是IEnumerable的XElements。这会带回这些价值：
<TraineeDetails diffgr:id="TraineeDetails1" msdata:rowOrder="0">
<ID>40798297</ID>
<SELF_MANAGED>0</SELF_MANAGED>
</TraineeDetails>
有什么想法吗？它看起来应该很简单，但是在选择后代时我得到了堆栈跟踪错误。
答案 0 :(得分：1)
您显示的XML中没有xs前缀的名称空间声明。您的XML文件是否按顺序排列，或者您是否错过了这个文件？
xmlns:xs="http://www.w3.org/2001/XMLSchema"
如果没有，请确保在查询前缀元素时也添加命名空间：
XNamespace xs = "http://www.w3.org/2001/XMLSchema";
IEnumerable<XElement> elements = doc.Descendants(xs + "element");
答案 1 :(得分：0)
根据这篇文章中的反馈，您可以使用它来选择后代并返回一个IEnumerable的XElements：
var traineeDetails = xDocument.Descendants("TraineeDetails");
也可以在C＃中使用LINQ来选择这些值，但我最终使用选项1：
var traineeDetails = from c in doc.Descendants("TraineeDetails ") select c;