XmlElementAttributes 类

定义

表示 XmlSerializer 用于重写其序列化类的默认方式的 XmlElementAttribute 对象的集合。Represents a collection of XmlElementAttribute objects used by the XmlSerializer to override the default way it serializes a class.

public ref class XmlElementAttributes : System::Collections::IList
public ref class XmlElementAttributes : System::Collections::CollectionBase
public class XmlElementAttributes : System.Collections.IList
public class XmlElementAttributes : System.Collections.CollectionBase
type XmlElementAttributes = class
    interface ICollection
    interface IEnumerable
    interface IList
type XmlElementAttributes = class
    inherit CollectionBase
Public Class XmlElementAttributes
Implements IList
Public Class XmlElementAttributes
Inherits CollectionBase
继承
XmlElementAttributes
继承
XmlElementAttributes
实现

示例

下面的示例对 Transportation 类进行序列化,该类包含一个名为 Vehicles 的字段,该字段返回 ArrayListThe following example serializes the Transportation class, which contains a single field named Vehicles that returns an ArrayList. 该示例首先将类的两个实例应用于 XmlElementAttribute Vehicles 字段,该字段指定 XmlSerializer 插入到数组中的对象的类型。The example first applies two instances of the XmlElementAttribute class to the Vehicles field that specifies the types of objects the XmlSerializer inserts into the array. 然后,该示例创建两个 XmlElementAttribute 对象来重写应用于属性的特性的行为 VehiclesThe example then creates two XmlElementAttribute objects to override the behavior of the attributes applied to the Vehicles property. 两个重写对象被添加到的 XmlElementAttributes 集合中 XmlAttributesThe two overriding objects are added to the XmlElementAttributes collection of an XmlAttributes. 最后,此示例将添加 XmlAttributesXmlAttributeOverrides ,以允许将 XmlSerializer 新的对象类型插入 ArrayList 字段返回的中 VehiclesLastly, the example adds the XmlAttributes to an XmlAttributeOverrides, allowing the XmlSerializer to insert the new object types into the ArrayList returned by the Vehicles field.

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

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

public ref class Car
{
public:
   String^ Name;
};

public ref class Plane
{
public:
   String^ Name;
};

public ref class Truck
{
public:
   String^ Name;
};

public ref class Train
{
public:
   String^ Name;
};

public ref class Transportation
{
public:

   // Override these two XmlElementAttributes.

   [XmlElement(Car::typeid),
   XmlElement(Plane::typeid)]
   ArrayList^ Vehicles;
};

XmlSerializer^ CreateOverrider()
{
   // Create XmlAtrributes and XmlAttributeOverrides instances. 
   XmlAttributes^ attrs = gcnew XmlAttributes;
   XmlAttributeOverrides^ xOver = gcnew XmlAttributeOverrides;

   /* Create an XmlElementAttributes object to override 
      one of the attributes applied to the Vehicles property. */
   XmlElementAttribute^ xElement1 = gcnew XmlElementAttribute( Truck::typeid );

   // Add the XmlElementAttribute to the collection.
   attrs->XmlElements->Add( xElement1 );

   /* Create a second XmlElementAttribute and 
      add it to the collection. */
   XmlElementAttribute^ xElement2 = gcnew XmlElementAttribute( Train::typeid );
   attrs->XmlElements->Add( xElement2 );

   /* Add the XmlAttributes to the XmlAttributeOverrides,
      specifying the member to override. */
   xOver->Add( Transportation::typeid, "Vehicles", attrs );

   // Create the XmlSerializer, and return it.
   XmlSerializer^ xSer = gcnew XmlSerializer( Transportation::typeid,xOver );
   return xSer;
}

void SerializeObject( String^ filename )
{
   // Create an XmlSerializer instance.
   XmlSerializer^ xSer = CreateOverrider();

   // Create the object.
   Transportation^ myTransportation = gcnew Transportation;

   /* Create two new, overriding objects that can be
      inserted into the Vehicles array. */
   myTransportation->Vehicles = gcnew ArrayList;
   Truck^ myTruck = gcnew Truck;
   myTruck->Name = "MyTruck";
   Train^ myTrain = gcnew Train;
   myTrain->Name = "MyTrain";
   myTransportation->Vehicles->Add( myTruck );
   myTransportation->Vehicles->Add( myTrain );
   TextWriter^ writer = gcnew StreamWriter( filename );
   xSer->Serialize( writer, myTransportation );
}

int main()
{
   SerializeObject( "OverrideElement.xml" );
}
using System;
using System.IO;
using System.Xml.Serialization;
using System.Collections;
using System.Xml;

public class Transportation
{
   // Override these two XmlElementAttributes.
   [XmlElement(typeof(Car)),
   XmlElement(typeof(Plane))]
   public ArrayList Vehicles;
}

public class Car
{
   public string Name;
}

public class Plane
{
   public string Name;
}

public class Truck
{
   public string Name;
}

public class Train
{
   public string Name;
}

public class Test
{
   public static void Main()
   {
      Test t = new Test();
      t.SerializeObject("OverrideElement.xml");
   }

   public XmlSerializer CreateOverrider()
   {
      // Create XmlAtrributes and XmlAttributeOverrides instances.

      XmlAttributes attrs = new XmlAttributes();

      XmlAttributeOverrides xOver =
      new XmlAttributeOverrides();

      /* Create an XmlElementAttributes object to override
      one of the attributes applied to the Vehicles property. */
      XmlElementAttribute xElement1 =
      new XmlElementAttribute(typeof(Truck));
      // Add the XmlElementAttribute to the collection.
      attrs.XmlElements.Add(xElement1);

      /* Create a second XmlElementAttribute and
      add it to the collection. */
      XmlElementAttribute xElement2 =
      new XmlElementAttribute(typeof(Train));
      attrs.XmlElements.Add(xElement2);

      /* Add the XmlAttributes to the XmlAttributeOverrides,
      specifying the member to override. */
      xOver.Add(typeof(Transportation), "Vehicles", attrs);

      // Create the XmlSerializer, and return it.
      XmlSerializer xSer = new XmlSerializer
      (typeof(Transportation), xOver);
      return xSer;
   }

   public void SerializeObject(string filename)
   {
      // Create an XmlSerializer instance.
      XmlSerializer xSer = CreateOverrider();

      // Create the object.
      Transportation myTransportation =
      new Transportation();

      /* Create two new, overriding objects that can be
      inserted into the Vehicles array. */
      myTransportation.Vehicles = new ArrayList();
      Truck myTruck = new Truck();
      myTruck.Name = "MyTruck";

      Train myTrain = new Train();
      myTrain.Name = "MyTrain";

      myTransportation.Vehicles.Add(myTruck);
      myTransportation.Vehicles.Add(myTrain);

      TextWriter writer = new StreamWriter(filename);
      xSer.Serialize(writer, myTransportation);
   }
}

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


Public Class Transportation
    ' Override these two XmlElementAttributes.
    <XmlElement(GetType(Car)), _
     XmlElement(GetType(Plane))> _
    Public Vehicles As ArrayList
End Class

Public Class Car
    Public Name As String
End Class

Public Class Plane
    Public Name As String
End Class

Public Class Truck
    Public Name As String
End Class

Public Class Train
    Public Name As String
End Class

Public Class Test
    
    Public Shared Sub Main()
        Dim t As New Test()
        t.SerializeObject("OverrideElement.xml")
    End Sub
    
    
    Public Function CreateOverrider() As XmlSerializer
        ' Create XmlAtrributes and XmlAttributeOverrides instances. 
        Dim attrs As New XmlAttributes()
        
        Dim xOver As New XmlAttributeOverrides()
        
        ' Create an XmlElementAttributes object to override
        ' one of the attributes applied to the Vehicles property. 
        Dim xElement1 As New XmlElementAttribute(GetType(Truck))
        ' Add the XmlElementAttribute to the collection.
        attrs.XmlElements.Add(xElement1)
        
        ' Create a second XmlElementAttribute and
        ' add it to the collection. 
        Dim xElement2 As New XmlElementAttribute(GetType(Train))
        attrs.XmlElements.Add(xElement2)
        
        ' Add the XmlAttributes to the XmlAttributeOverrides,
        ' specifying the member to override. 
        xOver.Add(GetType(Transportation), "Vehicles", attrs)
        
        ' Create the XmlSerializer, and return it.
        Dim xSer As New XmlSerializer(GetType(Transportation), xOver)
        Return xSer
    End Function
    
    
    Public Sub SerializeObject(ByVal filename As String)
        ' Create an XmlSerializer instance.
        Dim xSer As XmlSerializer = CreateOverrider()
        
        ' Create the object.
        Dim myTransportation As New Transportation()
        
        ' Create two new, overriding objects that can be
        ' inserted into the Vehicles array. 
        myTransportation.Vehicles = New ArrayList()
        Dim myTruck As New Truck()
        myTruck.Name = "MyTruck"
        
        Dim myTrain As New Train()
        myTrain.Name = "MyTrain"
        
        myTransportation.Vehicles.Add(myTruck)
        myTransportation.Vehicles.Add(myTrain)
        
        Dim writer As New StreamWriter(filename)
        xSer.Serialize(writer, myTransportation)
    End Sub
End Class

注解

XmlElementAttributes由类的属性返回 XmlElements XmlAttributesThe XmlElementAttributes is returned by the XmlElements property of the XmlAttributes class. 通过使用 XmlAttributeOverrides 类和 XmlAttributes 类,可以重写 XmlSerializer 序列化类的默认方式。By using the XmlAttributeOverrides class and the XmlAttributes class, you can override the default way that the XmlSerializer serializes a class.

构造函数

XmlElementAttributes()

初始化 XmlElementAttributes 类的新实例。Initializes a new instance of the XmlElementAttributes class.

属性

Capacity

获取或设置 CollectionBase 可包含的元素数。Gets or sets the number of elements that the CollectionBase can contain.

(继承自 CollectionBase)
Count

获取 ICollection 中包含的元素数。Gets the number of elements contained in the ICollection.

Count

获取 CollectionBase 实例中包含的元素数。Gets the number of elements contained in the CollectionBase instance. 不能重写此属性。This property cannot be overridden.

(继承自 CollectionBase)
InnerList

获取一个 ArrayList,它包含 CollectionBase 实例中元素的列表。Gets an ArrayList containing the list of elements in the CollectionBase instance.

(继承自 CollectionBase)
Item[Int32]

获取或设置指定索引处的元素。Gets or sets the element at the specified index.

List

获取一个 IList,它包含 CollectionBase 实例中元素的列表。Gets an IList containing the list of elements in the CollectionBase instance.

(继承自 CollectionBase)

方法

Add(XmlElementAttribute)

XmlElementAttribute 添加到集合中。Adds an XmlElementAttribute to the collection.

Clear()

IList 中移除所有项。Removes all items from the IList.

Clear()

CollectionBase 实例移除所有对象。Removes all objects from the CollectionBase instance. 不能重写此方法。This method cannot be overridden.

(继承自 CollectionBase)
Contains(XmlElementAttribute)

确定集合中是否包含指定的对象。Determines whether the collection contains the specified object.

CopyTo(XmlElementAttribute[], Int32)

XmlElementAttributes 或它的一部分复制到一维数组中。Copies the XmlElementAttributes, or a portion of it to a one-dimensional array.

Equals(Object)

确定指定对象是否等于当前对象。Determines whether the specified object is equal to the current object.

(继承自 Object)
GetEnumerator()

返回循环访问集合的枚举数。Returns an enumerator that iterates through a collection.

GetEnumerator()

返回循环访问 CollectionBase 实例的枚举器。Returns an enumerator that iterates through the CollectionBase instance.

(继承自 CollectionBase)
GetHashCode()

作为默认哈希函数。Serves as the default hash function.

(继承自 Object)
GetType()

获取当前实例的 TypeGets the Type of the current instance.

(继承自 Object)
IndexOf(XmlElementAttribute)

获取指定 XmlElementAttribute 的索引。Gets the index of the specified XmlElementAttribute.

Insert(Int32, XmlElementAttribute)

向集合插入 XmlElementAttributeInserts an XmlElementAttribute into the collection.

MemberwiseClone()

创建当前 Object 的浅表副本。Creates a shallow copy of the current Object.

(继承自 Object)
OnClear()

清除 CollectionBase 实例的内容时执行其他自定义进程。Performs additional custom processes when clearing the contents of the CollectionBase instance.

(继承自 CollectionBase)
OnClearComplete()

在清除 CollectionBase 实例的内容之后执行其他自定义进程。Performs additional custom processes after clearing the contents of the CollectionBase instance.

(继承自 CollectionBase)
OnInsert(Int32, Object)

在向 CollectionBase 实例中插入新元素之前执行其他自定义进程。Performs additional custom processes before inserting a new element into the CollectionBase instance.

(继承自 CollectionBase)
OnInsertComplete(Int32, Object)

在向 CollectionBase 实例中插入新元素之后执行其他自定义进程。Performs additional custom processes after inserting a new element into the CollectionBase instance.

(继承自 CollectionBase)
OnRemove(Int32, Object)

当从 CollectionBase 实例移除元素时执行其他自定义进程。Performs additional custom processes when removing an element from the CollectionBase instance.

(继承自 CollectionBase)
OnRemoveComplete(Int32, Object)

在从 CollectionBase 实例中移除元素之后执行其他自定义进程。Performs additional custom processes after removing an element from the CollectionBase instance.

(继承自 CollectionBase)
OnSet(Int32, Object, Object)

当在 CollectionBase 实例中设置值之前执行其他自定义进程。Performs additional custom processes before setting a value in the CollectionBase instance.

(继承自 CollectionBase)
OnSetComplete(Int32, Object, Object)

当在 CollectionBase 实例中设置值后执行其他自定义进程。Performs additional custom processes after setting a value in the CollectionBase instance.

(继承自 CollectionBase)
OnValidate(Object)

当验证值时执行其他自定义进程。Performs additional custom processes when validating a value.

(继承自 CollectionBase)
Remove(XmlElementAttribute)

从集合中删除指定的对象。Removes the specified object from the collection.

RemoveAt(Int32)

移除位于指定索引处的 IList 项。Removes the IList item at the specified index.

RemoveAt(Int32)

移除 CollectionBase 实例的指定索引处的元素。Removes the element at the specified index of the CollectionBase instance. 此方法不可重写。This method is not overridable.

(继承自 CollectionBase)
ToString()

返回表示当前对象的字符串。Returns a string that represents the current object.

(继承自 Object)

显式接口实现

ICollection.CopyTo(Array, Int32)

从特定的 ICollection 索引开始,将 Array 的元素复制到一个 Array 中。Copies the elements of the ICollection to an Array, starting at a particular Array index.

ICollection.CopyTo(Array, Int32)

从目标数组的指定索引处开始将整个 CollectionBase 复制到兼容的一维 ArrayCopies the entire CollectionBase to a compatible one-dimensional Array, starting at the specified index of the target array.

(继承自 CollectionBase)
ICollection.IsSynchronized

获取一个值,该值指示是否同步对 ICollection 的访问(线程安全)。Gets a value indicating whether access to the ICollection is synchronized (thread safe).

ICollection.IsSynchronized

获取一个值,该值指示是否同步对 CollectionBase 的访问(线程安全)。Gets a value indicating whether access to the CollectionBase is synchronized (thread safe).

(继承自 CollectionBase)
ICollection.SyncRoot

获取可用于同步对 ICollection 的访问的对象。Gets an object that can be used to synchronize access to the ICollection.

ICollection.SyncRoot

获取可用于同步对 CollectionBase 的访问的对象。Gets an object that can be used to synchronize access to the CollectionBase.

(继承自 CollectionBase)
IList.Add(Object)

将某项添加到 IList 中。Adds an item to the IList.

IList.Add(Object)

将对象添加到 CollectionBase 的结尾处。Adds an object to the end of the CollectionBase.

(继承自 CollectionBase)
IList.Contains(Object)

确定 IList 是否包含特定值。Determines whether the IList contains a specific value.

IList.Contains(Object)

确定 CollectionBase 是否包含特定元素。Determines whether the CollectionBase contains a specific element.

(继承自 CollectionBase)
IList.IndexOf(Object)

确定 IList 中特定项的索引。Determines the index of a specific item in the IList.

IList.IndexOf(Object)

搜索指定的 Object,并返回整个 CollectionBase 中第一个匹配项的从零开始的索引。Searches for the specified Object and returns the zero-based index of the first occurrence within the entire CollectionBase.

(继承自 CollectionBase)
IList.Insert(Int32, Object)

IList 中的指定索引处插入一个项。Inserts an item to the IList at the specified index.

IList.Insert(Int32, Object)

将元素插入 CollectionBase 的指定索引处。Inserts an element into the CollectionBase at the specified index.

(继承自 CollectionBase)
IList.IsFixedSize

获取一个值,该值指示 IList 是否具有固定大小。Gets a value indicating whether the IList has a fixed size.

IList.IsFixedSize

获取一个值,该值指示 CollectionBase 是否具有固定大小。Gets a value indicating whether the CollectionBase has a fixed size.

(继承自 CollectionBase)
IList.IsReadOnly

获取一个值,该值指示 IList 是否为只读。Gets a value indicating whether the IList is read-only.

IList.IsReadOnly

获取一个值,该值指示 CollectionBase 是否为只读。Gets a value indicating whether the CollectionBase is read-only.

(继承自 CollectionBase)
IList.Item[Int32]

获取或设置指定索引处的元素。Gets or sets the element at the specified index.

IList.Item[Int32]

获取或设置指定索引处的元素。Gets or sets the element at the specified index.

(继承自 CollectionBase)
IList.Remove(Object)

IList 中移除特定对象的第一个匹配项。Removes the first occurrence of a specific object from the IList.

IList.Remove(Object)

CollectionBase 中移除特定对象的第一个匹配项。Removes the first occurrence of a specific object from the CollectionBase.

(继承自 CollectionBase)

扩展方法

Cast<TResult>(IEnumerable)

IEnumerable 的元素强制转换为指定的类型。Casts the elements of an IEnumerable to the specified type.

OfType<TResult>(IEnumerable)

根据指定类型筛选 IEnumerable 的元素。Filters the elements of an IEnumerable based on a specified type.

AsParallel(IEnumerable)

启用查询的并行化。Enables parallelization of a query.

AsQueryable(IEnumerable)

IEnumerable 转换为 IQueryableConverts an IEnumerable to an IQueryable.

适用于

另请参阅