我会从 xml 创建一个类.在执行此操作之前，请获取 xml 样本，如上所述，并将轴节点添加到任何一个行星节点.然后在visual studio中，编辑>>将Xml粘贴为类.它将创建您的模型.

I would create a class from the xml. Before you do that, take a sample of the xml, as you have above, and add the axis node to any one of the planet nodes. Then in visual studio, Edit >> Paste Xml as Classes. It will create your model.

XML:

<planets>
  <planet>
    <name>A Place</name>
    <xcood>-123.764</xcood>
    <ycood>272.182</ycood>
  </planet>
  <planet>
    <name>Abadan</name>
    <xcood>-70.319</xcood>
    <ycood>-95.949</ycood>
    <axis>some string</axis> <!--added this-->
    <pressure>3</pressure>
    <gravity>1.03</gravity>
    <lifeForm>7</lifeForm>
    <climate>2</climate>
    <percentWater>63</percentWater>
    <temperature>22</temperature>
    <spectralClass>F</spectralClass>
    <subtype>1</subtype>
    <luminosity>V</luminosity>
    <sysPos>5</sysPos>
    <socioIndustrial>C-C-D-C-C</socioIndustrial>
    <landMass>Abadan Major (Abbasid)</landMass>
    <landMass>Abadan Minor</landMass>
    <landMass>Kuran Major</landMass>
    <landMass>Kuran Minor</landMass>
    <hpg>B</hpg>
  </planet>
  <planet>
    <name>Abagnar</name>
    <xcood>380.231</xcood>
    <ycood>314.823</ycood>
    <faction>UND</faction>
    <factionChange>
      <date>2750-01-01</date>
      <faction>DC</faction>
    </factionChange>
  </planet>
</planets>

生成的类:

'''<remarks/>
<System.Xml.Serialization.XmlTypeAttribute(AnonymousType:=True),
    System.Xml.Serialization.XmlRootAttribute([Namespace]:="", IsNullable:=False)>
Partial Public Class planets

    Private planetField() As planetsPlanet

    '''<remarks/>
    <System.Xml.Serialization.XmlElementAttribute("planet")>
    Public Property planet() As planetsPlanet()
        Get
            Return Me.planetField
        End Get
        Set
            Me.planetField = Value
        End Set
    End Property
End Class

'''<remarks/>
<System.Xml.Serialization.XmlTypeAttribute(AnonymousType:=True)>
Partial Public Class planetsPlanet

    Private nameField As String

    Private xcoodField As Decimal

    Private ycoodField As Decimal

    Private factionField As String

    Private factionChangeField As planetsPlanetFactionChange

    Private axisField As String

    Private pressureField As Byte

    Private pressureFieldSpecified As Boolean

    Private gravityField As Decimal

    Private gravityFieldSpecified As Boolean

    Private lifeFormField As Byte

    Private lifeFormFieldSpecified As Boolean

    Private climateField As Byte

    Private climateFieldSpecified As Boolean

    Private percentWaterField As Byte

    Private percentWaterFieldSpecified As Boolean

    Private temperatureField As Byte

    Private temperatureFieldSpecified As Boolean

    Private spectralClassField As String

    Private subtypeField As Byte

    Private subtypeFieldSpecified As Boolean

    Private luminosityField As String

    Private sysPosField As Byte

    Private sysPosFieldSpecified As Boolean

    Private socioIndustrialField As String

    Private landMassField() As String

    Private hpgField As String

    '''<remarks/>
    Public Property name() As String
        Get
            Return Me.nameField
        End Get
        Set
            Me.nameField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property xcood() As Decimal
        Get
            Return Me.xcoodField
        End Get
        Set
            Me.xcoodField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property ycood() As Decimal
        Get
            Return Me.ycoodField
        End Get
        Set
            Me.ycoodField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property faction() As String
        Get
            Return Me.factionField
        End Get
        Set
            Me.factionField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property factionChange() As planetsPlanetFactionChange
        Get
            Return Me.factionChangeField
        End Get
        Set
            Me.factionChangeField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property axis() As String
        Get
            Return Me.axisField
        End Get
        Set
            Me.axisField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property pressure() As Byte
        Get
            Return Me.pressureField
        End Get
        Set
            Me.pressureField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property pressureSpecified() As Boolean
        Get
            Return Me.pressureFieldSpecified
        End Get
        Set
            Me.pressureFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property gravity() As Decimal
        Get
            Return Me.gravityField
        End Get
        Set
            Me.gravityField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property gravitySpecified() As Boolean
        Get
            Return Me.gravityFieldSpecified
        End Get
        Set
            Me.gravityFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property lifeForm() As Byte
        Get
            Return Me.lifeFormField
        End Get
        Set
            Me.lifeFormField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property lifeFormSpecified() As Boolean
        Get
            Return Me.lifeFormFieldSpecified
        End Get
        Set
            Me.lifeFormFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property climate() As Byte
        Get
            Return Me.climateField
        End Get
        Set
            Me.climateField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property climateSpecified() As Boolean
        Get
            Return Me.climateFieldSpecified
        End Get
        Set
            Me.climateFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property percentWater() As Byte
        Get
            Return Me.percentWaterField
        End Get
        Set
            Me.percentWaterField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property percentWaterSpecified() As Boolean
        Get
            Return Me.percentWaterFieldSpecified
        End Get
        Set
            Me.percentWaterFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property temperature() As Byte
        Get
            Return Me.temperatureField
        End Get
        Set
            Me.temperatureField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property temperatureSpecified() As Boolean
        Get
            Return Me.temperatureFieldSpecified
        End Get
        Set
            Me.temperatureFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property spectralClass() As String
        Get
            Return Me.spectralClassField
        End Get
        Set
            Me.spectralClassField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property subtype() As Byte
        Get
            Return Me.subtypeField
        End Get
        Set
            Me.subtypeField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property subtypeSpecified() As Boolean
        Get
            Return Me.subtypeFieldSpecified
        End Get
        Set
            Me.subtypeFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property luminosity() As String
        Get
            Return Me.luminosityField
        End Get
        Set
            Me.luminosityField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property sysPos() As Byte
        Get
            Return Me.sysPosField
        End Get
        Set
            Me.sysPosField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlIgnoreAttribute()>
    Public Property sysPosSpecified() As Boolean
        Get
            Return Me.sysPosFieldSpecified
        End Get
        Set
            Me.sysPosFieldSpecified = Value
        End Set
    End Property

    '''<remarks/>
    Public Property socioIndustrial() As String
        Get
            Return Me.socioIndustrialField
        End Get
        Set
            Me.socioIndustrialField = Value
        End Set
    End Property

    '''<remarks/>
    <System.Xml.Serialization.XmlElementAttribute("landMass")>
    Public Property landMass() As String()
        Get
            Return Me.landMassField
        End Get
        Set
            Me.landMassField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property hpg() As String
        Get
            Return Me.hpgField
        End Get
        Set
            Me.hpgField = Value
        End Set
    End Property
End Class

'''<remarks/>
<System.Xml.Serialization.XmlTypeAttribute(AnonymousType:=True)>
Partial Public Class planetsPlanetFactionChange

    Private dateField As Date

    Private factionField As String

    '''<remarks/>
    <System.Xml.Serialization.XmlElementAttribute(DataType:="date")>
    Public Property [date]() As Date
        Get
            Return Me.dateField
        End Get
        Set
            Me.dateField = Value
        End Set
    End Property

    '''<remarks/>
    Public Property faction() As String
        Get
            Return Me.factionField
        End Get
        Set
            Me.factionField = Value
        End Set
    End Property
End Class

现在，这个类很容易使用，因为您拥有 .NET 类，而不是尝试导航 xml 文件.我建议使用 xml 序列化将 xml 加载到 .NET 对象中:

Now, this class is very easy to work with because you have .NET classes instead of trying to navigate an xml file. I suggest using xml serialization to load the xml into the .NET object:

Imports System.Xml.Serialization
Imports System.IO

Module Module1

    Sub Main()
        Dim s As New XmlSerializer(GetType(planets))
        Dim p As planets
        ' load the xml file
        Using fs As New FileStream("planets.xml", FileMode.Open)
            p = s.Deserialize(fs)
        End Using
        ' operations on the planet objects
        For Each planet In p.planet
            planet.axis = "new value"
        Next
        ' overwrite the xml file
        Using fs As New FileStream("planets.xml", FileMode.Truncate)
            s.Serialize(fs, p)
        End Using
    End Sub

End Module

如您所见，此代码会将每个行星的轴设置为新值".当然，您可以将其设置为任何您想要的值，因为在 for each 循环中您可以访问该星球的所有其他属性.不将它们视为 xml 节点会使它们更易于使用.

As you see, this code will set each planet's axis to "new value". Of course you can set it to whatever you want because in the for each loop you have access to all the other properties of the planet. Not thinking of them as xml nodes makes them much easier to work with.

注意:Visual Studio 的 Paste XML as Classes 很棒，但是如果您的字符串确实应该限制为几个值，那么将它们设为 Enum 是个好主意(如果没有您的干预，生成器不可能知道).您应该修改生成的类或模型，使其更准确地表示您的数据.

Note: Visual Studio's Paste XML as Classes is great, but if you have strings which should really be limited to a few values, it's a good idea to make them Enums (which the generator can't possibly know without your intervention). You should modify the generated classes or model to make it more accurately represent your data.