向 MessageContract WCF 响应对象 (MessageBodyMember) 添加多个命名空间

Adding multiple namespaces to MessageContract WCF response object (MessageBodyMember)

我们有一个包含以下合同的 WCF 设置:

    [ServiceContract(
    Namespace = Constants.Namespaces.HL7Namespace,
    Name = Constants.Roles.ContentRequiredDocumentManagementSystem)]
// XmlSerializerFormat is needed to expose the HL7 schema fields without the "Field" suffix on each one, eg: idField
[XmlSerializerFormat]
public interface ICDARequest
{
    [OperationContract(
        // wsdl request action
        Action = Constants.Namespaces.HL7Namespace + ":" + Constants.Interactions.RCMR_IN000029UV01 + "." + Constants.VersionType.NormativeCode + Constants.Version.InteractionVersion,
        // wsdl operation name
        Name = Constants.Interactions.RCMR_IN000029UV01,
        // wsdl response action
        ReplyAction = Constants.Namespaces.HL7Namespace + ":" + Constants.Interactions.RCMR_IN000030UV01 + "." + Constants.VersionType.NormativeCode + Constants.Version.InteractionVersion)]
    SearchMessagesResponse SearchMessages(SearchMessagesRequest RCMR_IN000029UV01);


    [MessageContract(
        IsWrapped = false]
    public class SearchMessagesResponse
    {
        [MessageBodyMember(
            Name = State.Constants.Interactions.RCMR_IN000030UV01,
            Namespace = State.Constants.Namespaces.HL7Namespace)]
        public RCMR_IN000030UV01 data;
    }
}

添加了:

[System.Xml.Serialization.XmlTypeAttribute(TypeName = "BCCDX.DistributionStatus", Namespace = "urn:bccdx.ca")]
public partial class BCCDXDistributionStatus
{
    [System.Xml.Serialization.XmlElementAttribute("receivedTime", Namespace = "urn:bccdx.ca", IsNullable = false)]
    public TS receivedTime{...}
}

这是我们想要的。

然后在 WCF 服务中我们可以使用新的 class 和成员:

var distStatus = new BCCDXDistributionStatus();
distStatus.receivedTime = CreateTS(locStat.MessageDownloadDate);

然后将其序列化并通过网络发送出去,如下所示:

<distributionStatus xmlns="urn:bccdx.ca">
    <receivedTime value="201702150956-0800"/>
</distributionStatus>

这几乎是正确的。问题在于 XML 文档没有引用 "urn:bccdx.ca" 命名空间。我原以为它会在序列化时自动添加到文档根元素,但我错了。这是最终的样子:

<RCMR_IN000030UV01 ITSVersion="XML_1.0" xmlns="urn:hl7-org:v3">
...
</RCMR_IN000030UV01>

当真正想要的是:

<RCMR_IN000030UV01 ITSVersion="XML_1.0" xmlns="urn:hl7-org:v3" xmlns:x="urn:bccdx.ca">
...
</RCMR_IN000030UV01>

请注意带有前缀

的urn:bccdx.ca

我想知道如果我们可以添加多个名称空间,并通过合同为生成的序列化消息 XML 添加前缀?我在网上看到了覆盖默认序列化程序的提示,但我宁愿不这样做。这肯定是以前考虑过和处理过的吧?

首先,我将假设,在您的服务合同中的某处,您通过使用 [XmlSerializerFormat] 指定使用 XmlSerializer,例如:

[ServiceContract()]
[XmlSerializerFormat]
public interface IService1
{
    [OperationContract(
        // wsdl request action
        Action = Constants.Namespaces.HL7Namespace + ":" + Constants.Interactions.RCMR_IN000029UV01 + "." + Constants.VersionType.NormativeCode + Constants.Version.InteractionVersion,
        // wsdl operation name
        Name = Constants.Interactions.RCMR_IN000029UV01,
        // wsdl response action
        ReplyAction = Constants.Namespaces.HL7Namespace + ":" + Constants.Interactions.RCMR_IN000030UV01 + "." + Constants.VersionType.NormativeCode + Constants.Version.InteractionVersion)]
    SearchMessagesResponse SearchMessages(/* SearchMessagesRequest RCMR_IN000029UV01*/);
}

虽然您的问题中没有提到这一点,但如果您没有这样做,那么您类型中的 [System.Xml.Serialization.XmlElementAttribute(...)] 属性声明将没有任何效果,因为它们会被 DataContractSerializer 忽略。

其次,我假设您的 RCMR_IN000030UV01 类型当前看起来像这样:

[XmlRoot(ElementName = "RCMR_IN000030UV01", Namespace = "urn:hl7-org:v3")]
public partial class RCMR_IN000030UV01
{
    // The initially auto-generated code
    [XmlAttribute(AttributeName = "ITSVersion")]
    public string ITSVersion { get; set; }
}

public partial class RCMR_IN000030UV01
{
    // The added property
    [System.Xml.Serialization.XmlElementAttribute("distributionStatus", Namespace = "urn:bccdx.ca", IsNullable = false)]
    public BCCDXDistributionStatus distStatus { get; set; }
}

[System.Xml.Serialization.XmlTypeAttribute(TypeName = "BCCDX.DistributionStatus", Namespace = "urn:bccdx.ca")]
public partial class BCCDXDistributionStatus
{
    [System.Xml.Serialization.XmlElementAttribute("receivedTime", Namespace = "urn:bccdx.ca", IsNullable = false)]
    public TS receivedTime { get; set; }
}

public class TS
{
    [XmlAttribute("value")]
    public DateTime Value { get; set; }
}

目前您的服务 returning XML 看起来像这样:

<RCMR_IN000030UV01 ITSVersion="1.0"
    xmlns="urn:hl7-org:v3"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <distributionStatus
        xmlns="urn:bccdx.ca">
        <receivedTime value="2017-02-23T00:00:00-05:00"/>
    </distributionStatus>
</RCMR_IN000030UV01>

但是,你想要这个:

<RCMR_IN000030UV01 ITSVersion="1.0"
    xmlns="urn:hl7-org:v3"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    <!---This should be added ---->
    xmlns:x="urn:bccdx.ca">
    <!---And distributionStatus should be prefixed with x: ---->
    <x:distributionStatus>
        <x:receivedTime value="2017-02-23T00:00:00-05:00"/>
    </x:distributionStatus>
</RCMR_IN000030UV01>

首先我会注意到这两个 XML 文件在语义上是相同的。在第一种情况下,命名空间 "urn:bccdx.ca" 被声明为实际需要它的最低元素上的默认命名空间。在第二个中,它是在文件开头用前缀定义的。无论哪种方式,元素 <distributionStatus> 及其子元素最终都会出现在正确的命名空间中。

因此,您可以简单地接受 XML 原样正确。

如果出于某种原因,您必须让命名空间出现在 XML 的开头并带有 x: 前缀,您可以添加一个[XmlNamespaceDeclarations] 属性 到您的 RCMR_IN000030UV01 以强制在更高级别声明您的命名空间:

public partial class RCMR_IN000030UV01
{
    [XmlNamespaceDeclarations]
    public XmlSerializerNamespaces xmlsn
    {
        get
        {
            var ns = new XmlSerializerNamespaces();
            ns.Add("x", "urn:bccdx.ca");
            return ns;
        }
        set
        {
            // Do nothing - fake property.
        }
    }
}

docs 中所述,此属性

Specifies that the target property, parameter, return value, or class member contains prefixes associated with namespaces that are used within an XML document.

现在您的服务应该 return XML 具有根元素上所需的命名空间。