序列化包含对象列表的对象

Question

我已经构建了一个 NotInheritable Serilizer，它可以成功地对我的所有类和类列表进行序列化。 直到我建立了一个包含类列表的类列表。 我得到运行时异常：生成 XML 文档时出错。导致一个完全空的 XML :(

这些是我要序列化的类：

<System.Serializable> _
<System.Xml.Serialization.XmlInclude(GetType(StatisticItem))> _
Public Class Statistic
    Public StatItem As New list(Of StatisticItem)
    'Bla bla bla
end class


<Serializable> _
Public Class StatisticItem              
        Private stStatPath As String = ""    
        Private eStatType As StatType = 0
        Private iBatchNumber As Int32 = 0
end class

还有序列化器：

Public NotInheritable Class XmlSerializer       

    Public Shared Sub Serialize(Of T)(ByVal obj As T, sConfigFilePath As String)        
        Dim XmlBuddy As New System.Xml.Serialization.XmlSerializer(GetType(T))
        Dim MySettings As New System.Xml.XmlWriterSettings()
        MySettings.Indent = True
        MySettings.CloseOutput = True       
        Dim MyWriter As System.Xml.XmlWriter=System.Xml.XmlWriter.Create(sConfigFilePath,MySettings)        
        XmlBuddy.Serialize(MyWriter,obj) 
        MyWriter.Flush()
        MyWriter.Close()    

        ' ----- OLD CODE FOR SERIALIZE, NEXTLINE IN XML DOESNT WORK ON WIN CE -------, 
        ' B.T.W. Using This code to serilize gives the exact same fault             
        'Dim XmlBuddy As New System.Xml.Serialization.XmlSerializer(GetType(T))
        'Dim objStreamWriter As New StreamWriter(sConfigFilePath)
        'XmlBuddy.Serialize(objStreamWriter, obj)
        'objStreamWriter.Close()
    End Sub
 end class

这就是电话：

 XmlSerializer.Serialize(Of list(Of Statistic))(StatCollection, CommCtrl.PathStatisticFile)

如果我在 StatisticItem 中评论列表，一切正常。

我想如果我在 StatisticItem 中实现 IXmlSerializable 我可以告诉序列化程序如何工作以使其工作，但我在互联网上看到其他代码示例无需所有这些努力就可以工作 而且我更喜欢一个干净的解决方案，这与我所有其他课程大致相同。

希望你们能帮帮我

Answer 1

是的，解决了！老实说，我改变了很多小东西，以至于我仍然不知道原因是什么。 也许还有一些私人成员。 无论如何，也许代码对任何人都有用：

Public Class Statistic 

    'Properties         
    Private eStatName As String                     
    Private eStatSort As StatSort            
    Private StatItem As New list(Of StatisticItem)


    Public Property Name() As String
      Get
          Return eStatName
      End Get
      Set(ByVal value As String)
          eStatName = value
      End Set
    End Property

    'Other public properties
End class



Public Class StatisticItem  
    Private stStatPath As String = ""    
    Private eStatType As StatType = 0
    Private iBatchNumber As Int32 = 0

Public Property Path() As String
    Get
        Return stStatPath
    End Get
    Set(ByVal Value As String)
        stStatPath = Value
    End Set
End Property

' The other Public Properties

序列化器：

Public NotInheritable Class XmlSerializer

    ''' <summary>
    ''' Convert a class state into XML
    ''' </summary>
    ''' <typeparam name="T">The type of object</typeparam>
    ''' <param name="obj">The object to serilize</param>
    ''' <param name="sConfigFilePath">The path to the XML</param>
    Public Shared Sub Serialize(Of T)(ByVal obj As T, sConfigFilePath As String)        
        Dim XmlBuddy As New System.Xml.Serialization.XmlSerializer(GetType(T))
        Dim MySettings As New System.Xml.XmlWriterSettings()
        MySettings.Indent = True
        MySettings.CloseOutput = True       
        Dim MyWriter As System.Xml.XmlWriter = System.Xml.XmlWriter.Create(sConfigFilePath,MySettings)      
        XmlBuddy.Serialize(MyWriter,obj) 
        MyWriter.Flush()
        MyWriter.Close()    
    End Sub



''' <summary>
''' Restore a class state from XML
''' </summary>
''' <typeparam name="T">The type of object</typeparam>
''' <param name="xml">the path to the XML</param>
''' <returns>The object to return</returns>
Public Shared Function Deserialize(Of T)(ByVal xml As String) As T      
    Dim XmlBuddy As New System.Xml.Serialization.XmlSerializer(GetType(T))
    Dim fs As New FileStream(xml, FileMode.Open)
    Dim reader As New Xml.XmlTextReader(fs) 
    If XmlBuddy.CanDeserialize(reader) Then
        Dim tempObject As Object = DirectCast(XmlBuddy.Deserialize(reader), T)         
        reader.Close()
        Return tempObject
    Else
        Return Nothing
    End If
End Function
end class

序列化器的调用：

Try                     
     XmlSerializer.Serialize(Of list(Of Statistic))(StatCollection, CommCtrl.PathStatisticFile)
Catch ex As Exception
     msgbox(ex.Message)
End Try

反序列化器的调用：

Try
     StatCollection = XmlSerializer.Deserialize(Of list(Of Statistic)(CommCtrl.PathStatisticFile)
Catch ex As Exception
     msgbox(ex.Message)
end Try

Answer 2

我也需要这样做，但要创建一个字符串。这是我的解决方案：

    Public Shared Function Serialize(Of T)(ByVal obj As T) As String
        Dim xml As New System.Xml.Serialization.XmlSerializer(GetType(T))
        Dim ns As New System.Xml.Serialization.XmlSerializerNamespaces()
        ns.Add("", "") 'No namespaces needed.
        Dim sw As New IO.StringWriter()
        xml.Serialize(sw, obj, ns)

        If sw IsNot Nothing Then
            Return sw.ToString()
        Else
            Return ""
        End If
    End Function


    Public Shared Function Deserialize(Of T)(ByVal serializedXml As String) As T
        Dim xml As New System.Xml.Serialization.XmlSerializer(GetType(T))
        Dim sr As New IO.StringReader(serializedXml)
        Dim obj As T = CType(xml.Deserialize(sr), T)

        Return obj
    End Function