XmlAttributes.XmlAnyElements 属性

参考

定义

命名空间:: System.Xml.Serialization

程序集:: System.Xml.XmlSerializer.dll

程序集:: System.Xml.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

获取要替代的 XmlAnyElementAttribute 对象集合。

public:
 property System::Xml::Serialization::XmlAnyElementAttributes ^ XmlAnyElements { System::Xml::Serialization::XmlAnyElementAttributes ^ get(); };

public System.Xml.Serialization.XmlAnyElementAttributes XmlAnyElements { get; }

member this.XmlAnyElements : System.Xml.Serialization.XmlAnyElementAttributes

Public ReadOnly Property XmlAnyElements As XmlAnyElementAttributes

属性值

XmlAnyElementAttributes

表示 XmlAnyElementAttributes 对象集合的 XmlAnyElementAttribute 对象。

示例

以下示例创建一个新 XmlAnyElementAttribute 对象，并将其添加到通过 XmlAnyElements 属性访问的对象集合中。然后将该 XmlAttributes 对象添加到 XmlAttributeOverrides 用于创建 XmlSerializer 对象的对象。用于 XmlSerializer 序列化或反序列化对象。若要查看使用XmlAnyElementAttributes属性的效果，请在方法中Main运行SerializeObject方法，创建名为“UnknownElements.xml”的 XML 文档。编辑生成的文档以包含其他 (未知) 元素。注释掉 SerializeObject 方法中的 Main 调用，并取消注释对 DeserializeObject 方法的调用，该方法输出任何未知 XML 元素的名称和值。

#using <System.dll>
#using <System.xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml::Serialization;
using namespace System::Xml;
public ref class Group
{
public:
   String^ GroupName;

   [XmlAnyElement]
   array<Object^>^Things;
};

void SerializeObject( String^ filename );
void DeserializeObject( String^ filename );
XmlSerializer^ CreateOverrideSerializer();
int main()
{
   // 1 Run this and create the XML document.
   // 2 Add new elements to the XML document.
   // 3 Comment out the next line, and uncomment
   // the DeserializeObject line to deserialize the
   // XML document and see unknown elements.
   SerializeObject( "UnknownElements.xml" );

   // DeserializeObject(S"UnknownElements.xml");
}

void SerializeObject( String^ filename )
{
   XmlSerializer^ ser = gcnew XmlSerializer( Group::typeid );
   TextWriter^ writer = gcnew StreamWriter( filename );
   Group^ g = gcnew Group;
   g->GroupName = "MyGroup";
   ser->Serialize( writer, g );
   writer->Close();
}

void DeserializeObject( String^ filename )
{
   XmlSerializer^ ser = CreateOverrideSerializer();

   // A FileStream is needed to read the XML document.
   FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
   Group^ g = safe_cast<Group^>(ser->Deserialize( fs ));
   fs->Close();
   Console::WriteLine( g->GroupName );
   Console::WriteLine( g->Things->Length );
   for ( int i = 0; i < g->Things->Length; ++i )
   {
      XmlElement^ xelement = safe_cast<XmlElement^>(g->Things[ i ]);
      Console::WriteLine( "{0}: {1}", xelement->Name, xelement->InnerXml );
   }
}

XmlSerializer^ CreateOverrideSerializer()
{
   XmlAnyElementAttribute^ myAnyElement = gcnew XmlAnyElementAttribute;
   XmlAttributeOverrides^ xOverride = gcnew XmlAttributeOverrides;
   XmlAttributes^ xAtts = gcnew XmlAttributes;
   xAtts->XmlAnyElements->Add( myAnyElement );
   xOverride->Add( Group::typeid, "Things", xAtts );
   return gcnew XmlSerializer( Group::typeid,xOverride );
}

using System;
using System.IO;
using System.Xml.Serialization;
using System.Xml;

public class Group{
   public string GroupName;
   [XmlAnyElement]
   public object[]Things;
}

public class Test{
   static void Main(){
      Test t = new Test();
      // 1 Run this and create the XML document.
      // 2 Add new elements to the XML document.
      // 3 Comment out the new line, and uncomment
      // the DeserializeObject line to deserialize the
      // XML document and see unknown elements.
      t.SerializeObject("UnknownElements.xml");
     
      // t.DeserializeObject("UnknownElements.xml");
   }

   private void SerializeObject(string filename){
      XmlSerializer ser = new XmlSerializer(typeof (Group));
      TextWriter writer = new StreamWriter(filename);
      Group g = new Group();
      g.GroupName = "MyGroup";
      ser.Serialize(writer, g);
      writer.Close();
   }

   private void DeserializeObject(string filename){

      XmlSerializer ser = CreateOverrideSerializer();
      // A FileStream is needed to read the XML document.
      FileStream fs = new FileStream(filename, FileMode.Open);
     Group g = (Group)
        ser.Deserialize(fs);
     fs.Close();
     Console.WriteLine(g.GroupName);
     Console.WriteLine(g.Things.Length);
     foreach(XmlElement xelement in g.Things){
     Console.WriteLine(xelement.Name + ": " + xelement.InnerXml);
     }
   }

   private XmlSerializer CreateOverrideSerializer(){
      XmlAnyElementAttribute myAnyElement = 
      new XmlAnyElementAttribute();
      XmlAttributeOverrides xOverride = 
      new XmlAttributeOverrides();
      XmlAttributes xAtts = new XmlAttributes();
      xAtts.XmlAnyElements.Add(myAnyElement);
      xOverride.Add(typeof(Group), "Things", xAtts);
      return new XmlSerializer(typeof(Group) , xOverride);
   }
}

Imports System.IO
Imports System.Xml.Serialization
Imports System.Xml

Public Class Group
   Public GroupName As String 
   <XmlAnyElement> _
   Public Things () As object
End Class

Public Class Test
   Shared Sub Main()
      Dim t As Test = New Test()
      ' 1 Run this and create the XML document.
      ' 2 Add New elements to the XML document.
      ' 3 Comment out the New line, and uncomment
      ' the DeserializeObject line to deserialize the
      ' XML document and see unknown elements.
     t.SerializeObject("UnknownElements.xml")
     
      't.DeserializeObject("UnknownElements.xml")
   End Sub

   Private Sub SerializeObject(filename As String)
      Dim ser As XmlSerializer = New XmlSerializer(GetType (Group))
      Dim writer As TextWriter = New StreamWriter(filename)
      
      Dim g As Group = New Group()
      g.GroupName = "MyGroup"
      ser.Serialize(writer, g)
      writer.Close()
   End Sub

   
   Private Sub DeserializeObject(filename As String)

      Dim ser As XmlSerializer = CreateOverrideSerializer()
      ' A FileStream is needed to read the XML document.
      Dim fs As FileStream = New FileStream(filename, FileMode.Open)
     Dim g As Group = CType( _
        ser.Deserialize(fs), Group)
     fs.Close()
     Console.WriteLine(g.GroupName)
     Console.WriteLine(g.Things.Length)
     Dim xelement As XmlELement
     for each xelement in g.Things
        Console.WriteLine(xelement.Name &": " & xelement.InnerXml)
     next
   End Sub
   

   Private Function CreateOverrideSerializer() As XmlSerializer 
      Dim myAnyElement As XmlAnyElementAttribute = _
      New XmlAnyElementAttribute()
      Dim xOverride As XmlAttributeOverrides = _
      New XmlAttributeOverrides()
      Dim xAtts As XmlAttributes = New XmlAttributes()
      xAtts.XmlAnyElements.Add(myAnyElement)
      xOverride.Add(GetType(Group), "Things", xAtts)
      return New XmlSerializer(GetType(Group) , xOverride)
   End Function
End Class

注解

XmlAnyElementAttribute可以应用于返回反序列化对象数组XmlElement的成员。这样，就可以 XmlSerializer 反序列化对象中没有相应成员的任何元素，因此这些元素对该元素是“未知”的 XmlSerializer。当 XML Web 服务更改 XML 流或已知随机数据始终包含在 XML 流中时，这非常有用。

该 XmlAnyElements 属性允许重写成员的序列化，使其充当已应用的成员 XmlAnyElementAttribute 。

适用于

另请参阅

XmlAnyAttribute

通过

XmlAttributes.XmlAnyElements 属性

定义

属性值

示例

注解

适用于

另请参阅

其他资源