反序列化返回 0 但应该返回 1？答案

【问题标题】：Deserialize returns 0 but should be returning 1?反序列化返回 0 但应该返回 1？
【发布时间】：2020-11-17 22:31:47
【问题描述】：

我正在尝试使用对象列表反序列化 XML 文件。我的代码毫无例外地执行，但它总是返回 0 计数 (mRules.Count)？

mRules 总是返回 count = 0，我不知道为什么？我猜这与我的规则类中的对象列表（List（Of Rule））有关......或者可能更简单地使用“名称”作为属性而不是元素？

 <Rules>
    <Rule name="TV Offset">
        <ProductList>
            <Product name="Sony" spawnRatio="1">
                <Color r=".7" g=".8" b=".7"/>
            </Product>
            <Product name="LG" spawnRatio="1">
                <Color r=".7" g=".8" b=".7"/>
            </Product>
        </ProductList>
        <RegionList>
            <Location name="California South"/>
            <Location name="Texas East"/>
            <Location name="California North"/>
            <Location name="Nevada"/>
        </RegionList>
    </Rule>
    <Rule name="Oven Offset">
        <ProductList>
            <Product name="GE" spawnRatio="1">
                <Color r=".2" g=".2" b=".1"/>
            </Product>
            <Product name="KitchenAid" spawnRatio="2">
                <Color r=".2" g=".2" b=".1"/>
            </Product>
        </ProductList>
        <RegionList>
            <Location name="California South"/>
            <Location name="Texas East"/>
            <Location name="Washington North"/>
            <Location name="Oregon"/>
        </RegionList>
    </Rule> 
</Rules>
    
    
    Imports System.Xml.Serialization
    
    <Serializable(), XmlRoot("Rules"), System.Xml.Serialization.XmlInclude(GetType(Rules))>
    Public Class Rules
    
        <XmlElement("Rule")>
        Private _rule As List(Of Rule)
        Public Property Rule() As List(Of Rule)
            Get
                Return _rule
            End Get
            Set(ByVal value As List(Of Rule))
                _rule = value
            End Set
        End Property
    
    End Class

Imports System.Xml.Serialization

<Serializable(), System.Xml.Serialization.XmlInclude(GetType(Rule))>
Public Class Rule

    <XmlAttribute("name")>
    Private _name As String
    Public Property Name() As String
        Get
            Return _name
        End Get
        Set(ByVal value As String)
            _name = value
        End Set
    End Property

    ' TODO: ProductList  

    ' TODO: RegionList 

End Class


            Public Sub Load(ByVal vFile As String)
    
                Dim reader As New Xml.Serialization.XmlSerializer(GetType(Rules))
                Dim ruleFile As New StreamReader(vFile)
    
                Dim mRules As Rules
                mRules = CType(reader.Deserialize(ruleFile), Rules)
    
            End Sub

【问题讨论】：

标签： deserialization xmlserializer

【解决方案1】：

已解决：

在错误的行上，它需要高于 Public Property Rule()... XmlAttribute 相同。

错误：

<XmlElement("Rule")>
Private _rule As List(Of Rule)
Public Property Rule() As List(Of Rule)
    Get
        Return _rule
    End Get
    Set(ByVal value As List(Of Rule))
        _rule = value
    End Set
End Property

正确：

    Private _rule As List(Of Rule)
    <XmlElement("Rule")>
    Public Property Rule() As List(Of Rule)
        Get
            Return _rule
        End Get
        Set(ByVal value As List(Of Rule))
            _rule = value
        End Set
    End Property

【讨论】：