.Net服务端Soap接口返回xml的添加namespace格式问题

下面这段xml格式是一般soap的接口所返回的格式，但实际项目中的header和body部分的根节点是需要有前缀 “ns2”，实际上只需要添加一个namespace就行，但之前没有接触过。节点类似soapenv:Envelope

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <soap:Header>
  <responseHeader xmlns:ns2="http://www.org/">
   <numberOfHits>2</numberOfHits>
  </responseHeader>
 </soap:Header>
 <soap:Body>
  <getItem xmlns:ns2="http://www.org/" />
 </soap:Body>
</soap:Envelope>

百度是个坑，查到的结果大部分都是关于请求部分，很少有返回部分的例子，谷歌也搜了半天，最后终于找到解决办法。

下面的代码为 VB，C#可参照转换

<System.Xml.Serialization.XmlNamespaceDeclarations> _
    Public Property xmlns() As XmlSerializerNamespaces

        Get
            Dim xsn = New XmlSerializerNamespaces()
            xsn.Add("ns2", "http://www.org/")
            Return xsn
        End Get
        Set(value As XmlSerializerNamespaces)

        End Set
    End Property

把上面这段代码添加到需要“ns2”前缀的类里边去，比如我上面的responseHeader和getItem部分：

'''<remarks/>
<System.CodeDom.Compiler.GeneratedCodeAttribute("wsdl", "4.0.30319.17929"), _
 System.SerializableAttribute(), _
 System.Diagnostics.DebuggerStepThroughAttribute(), _
 System.ComponentModel.DesignerCategoryAttribute("code"), _
 System.Xml.Serialization.XmlTypeAttribute([Namespace]:="http://resolvingmo.ws.gs1.org/")> _
Partial Public Class getItem

    Private gepirItemField() As ItemDataLineType

    <System.Xml.Serialization.XmlNamespaceDeclarations> _
    Public Property xmlns() As XmlSerializerNamespaces

        Get
            Dim xsn = New XmlSerializerNamespaces()
            xsn.Add("ns2", "http://resolvingmo.ws.gs1.org/")
            Return xsn
        End Get
        Set(value As XmlSerializerNamespaces)

        End Set
    End Property
    '''<remarks/>
    <System.Xml.Serialization.XmlArrayAttribute(Form:=System.Xml.Schema.XmlSchemaForm.Unqualified), _
     System.Xml.Serialization.XmlArrayItemAttribute("itemDataLine", Form:=System.Xml.Schema.XmlSchemaForm.Unqualified, IsNullable:=False)> _
    Public Property gepirItem() As ItemDataLineType()
        Get
            Return Me.gepirItemField
        End Get
        Set(value As ItemDataLineType())
            Me.gepirItemField = value
        End Set
    End Property
End Class

最后生成的结果就行想要的了，xml添加了指定的前缀

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
 <soap:Header>
  <ns2:responseHeader xmlns:ns2="http://www.org/">
   <numberOfHits>2</numberOfHits>
  </ns2:responseHeader>
 </soap:Header>
 <soap:Body>
  <ns2:getItem xmlns:ns2="http://www.org/" />
 </soap:Body>
</soap:Envelope>

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