XmlAnyAttributeAttribute 類別

定義

命名空間:

System.Xml.Serialization

組件:

System.Xml.ReaderWriter.dll

Source:

XmlAnyAttributeAttribute.cs

指定成員 (傳回 XmlAttribute 物件陣列的欄位) 可以包含任何 XML 屬性。

public ref class XmlAnyAttributeAttribute : Attribute

[System.AttributeUsage(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, AllowMultiple=false)]
public class XmlAnyAttributeAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Field | System.AttributeTargets.Parameter | System.AttributeTargets.Property | System.AttributeTargets.ReturnValue, AllowMultiple=false)>]
type XmlAnyAttributeAttribute = class
    inherit Attribute

Public Class XmlAnyAttributeAttribute
Inherits Attribute

繼承

Object

Attribute

XmlAnyAttributeAttribute

屬性

AttributeUsageAttribute

範例

下列範例會將所有未知屬性收集到 物件的陣列 XmlAttribute 中。 若要嘗試此範例，請建立名為 UnknownAttributes.xml 的檔案，其中包含下列 XML：

<?xml version="1.0" encoding="utf-8"?>  
<Group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"   
xmlns:xsd="http://www.w3.org/2001/XMLSchema"   
GroupType = 'Technical' GroupNumber = '42' GroupBase = 'Red'>  
  <GroupName>MyGroup</GroupName>  
</Group>  

#using <System.dll>
#using <System.Xml.dll>

using namespace System;
using namespace System::Collections;
using namespace System::IO;
using namespace System::Xml::Serialization;
using namespace System::Xml;

public ref class Group
{
public:
   String^ GroupName;

   // The UnknownAttributes array will be used to collect all unknown
   // attributes found when deserializing.

   [XmlAnyAttributeAttribute]
   array<XmlAttribute^>^XAttributes;
};

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

void DeserializeObject( String^ filename )
{
   XmlSerializer^ ser = gcnew XmlSerializer( Group::typeid );

   // 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();

   // Write out the data, including unknown attributes.
   Console::WriteLine( g->GroupName );
   Console::WriteLine(  "Number of unknown attributes: {0}", g->XAttributes->Length );
   for ( IEnumerator ^ e = g->XAttributes->GetEnumerator(); e->MoveNext();  )
   {
      XmlAttribute^ xAtt = safe_cast<XmlAttribute^>(e->Current);
      Console::WriteLine( "{0}: {1}", xAtt->Name, xAtt->InnerXml );
   }
   SerializeObject( "AttributesAdded.xml", g );
}

int main()
{
   // Deserialize the file containing unknown attributes.
   DeserializeObject(  "UnknownAttributes.xml" );
}

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

public class Group{
   public string GroupName;
   // The UnknownAttributes array will be used to collect all unknown
   // attributes found when deserializing.
   [XmlAnyAttribute]
    public XmlAttribute[]XAttributes;
}

public class Test{
   static void Main(){
      Test t = new Test();
      // Deserialize the file containing unknown attributes.

      t.DeserializeObject("UnknownAttributes.xml");
   }

   private void DeserializeObject(string filename){
      XmlSerializer ser = new XmlSerializer(typeof(Group));
      // A FileStream is needed to read the XML document.
     FileStream fs = new FileStream(filename, FileMode.Open);
     Group g = (Group) ser.Deserialize(fs);
     fs.Close();
     // Write out the data, including unknown attributes.
     Console.WriteLine(g.GroupName);
     Console.WriteLine("Number of unknown attributes: " + 
     g.XAttributes.Length);
     foreach(XmlAttribute xAtt in g.XAttributes){
     Console.WriteLine(xAtt.Name + ": " + xAtt.InnerXml);
     }
     // Serialize the object again with the attributes added.
     this.SerializeObject("AttributesAdded.xml",g);
   }

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

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

Public Class Group
   Public GroupName As String 
   ' The UnknownAttributes array will be used to collect all unknown
   ' attributes found when deserializing.
   <XmlAnyAttribute> _
    Public UnknownAttributes()As XmlAttribute
End Class

Public Class Test
   Shared Sub Main()
      Dim t  As Test = New Test()
      ' Deserialize the file containing unknown attributes.
      t.DeserializeObject("UnknownAttributes.xml")
   End Sub

   Private Sub DeserializeObject(filename As String)
      Dim ser As XmlSerializer = New XmlSerializer(GetType(Group))
      ' 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()
     ' Write out the data, including unknown attributes.
     Console.WriteLine(g.GroupName)
     Console.WriteLine("Number of unknown attributes: " & _ 
     g.UnknownAttributes.Length)
     Dim xAtt As XmlAttribute
     for each xAtt in g.UnknownAttributes
        Console.WriteLine(xAtt.Name & ": " & xAtt.InnerXml)
     Next
     ' Serialize the object again with the attributes added.
     Me.SerializeObject("AttributesAdded.xml",g)
   End Sub

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

備註

XmlAnyAttributeAttribute使用 包含任意資料 (做為 XML 屬性，) 做為 XML 檔的一部分傳送，例如，以檔一部分傳送的中繼資料。

將 XmlAnyAttributeAttribute 套用至傳回 或 XmlNode 物件陣列的 XmlAttribute 欄位。 Deserialize呼叫 類別的 方法時，所有在要還原序列化之類別中沒有對應成員的 XmlSerializer XML 屬性都會收集在陣列中。 還原序列化之後，您可以逐一查看專案的集合 XmlAttribute 來處理資料。

UnknownNode如果您將 套用 XmlAnyAttributeAttribute 至 類別的成員，則不會發生 的 和 UnknownAttribute 事件 XmlSerializer 。

注意

您可以在程式碼中使用字組 XmlAnyAttribute ，而不是較長 XmlAnyAttributeAttribute 的 。

如需使用屬性的詳細資訊，請參閱 屬性。

建構函式

XmlAnyAttributeAttribute()

建構 XmlAnyAttributeAttribute 類別的新執行個體。

屬性

TypeId

在衍生類別中實作時，取得這個 Attribute 的唯一識別碼。 (繼承來源 Attribute)

方法

Equals(Object)	傳回值，這個值指出此執行個體是否與指定的物件相等。 (繼承來源 Attribute)
GetHashCode()	傳回這個執行個體的雜湊碼。 (繼承來源 Attribute)
GetType()	取得目前執行個體的 Type。 (繼承來源 Object)
IsDefaultAttribute()	在衍生類別中覆寫時，表示這個執行個體的值是衍生類別的預設值。 (繼承來源 Attribute)
Match(Object)	在衍生類別中覆寫時，會傳回值，表示這個執行個體是否等於指定物件。 (繼承來源 Attribute)
MemberwiseClone()	建立目前 Object 的淺層複製。 (繼承來源 Object)
ToString()	傳回代表目前物件的字串。 (繼承來源 Object)

另請參閱

• XmlAnyElementAttribute
• XmlSerializer
• XmlAttributes
• XML 序列化簡介
• HOW TO：指定 XML 資料流的替代元素名稱
• 使用屬性控制 XML 序列化
• XML 序列化的範例
• XML 結構描述定義工具 (Xsd.exe)