2

我们有一个带有以下合约的 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;
    }
}
  • 这些基于使用xsd.exe.
  • 然后,我们更改架构以使用自定义命名空间添加自定义元素以区分它并重新生成类。
  • 这工作得很好。

它补充说:

[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{...}
}

这是想要的。

然后在 WCF 服务中,我们可以使用新的类和成员:

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

然后将其序列化并通过网络发送,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 文档没有对"urn:bccdx.ca"命名空间的引用。我假设它会在序列化时自动添加到文档根元素中,但我错了。这就是最终的样子:

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

当真正需要的是:

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

注意带有前缀的 urn:bccdx.ca

我想知道,如果我们可以添加多个命名空间,如何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。以前肯定已经考虑过并处理过这个问题吗?

4

1 回答 1

3

首先,我将假设,在您的服务合同的某处,您指定使用XmlSerializerby using [XmlSerializerFormat],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[System.Xml.Serialization.XmlElementAttribute(...)]您的类型中的属性声明将无效,因为它们被DataContractSerializer.

其次,我将假设您的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; }
}

当前,您的服务正在返回如下所示的 XML:

<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。在第二种情况下,它在文件的开头用前缀定义。无论哪种方式,元素<distributionStatus>及其子元素都最终位于正确的命名空间中。

因此,您可以简单地按原样接受 XML。

如果由于某种原因,您必须让命名空间出现在带有前缀的 XML 的开头x:,您可以向您添加一个[XmlNamespaceDeclarations]属性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.
        }
    }
}

文档中所述,此属性

指定目标属性、参数、返回值或类成员包含与 XML 文档中使用的名称空间相关联的前缀。

现在,您的服务应该根据需要返回带有根元素上的命名空间的 XML。

于 2017-02-24T01:12:55.030 回答