DefaultPropertyAttribute 类

定义

public ref class DefaultPropertyAttribute sealed : Attribute

[System.AttributeUsage(System.AttributeTargets.Class)]
public sealed class DefaultPropertyAttribute : Attribute

public sealed class DefaultPropertyAttribute : Attribute

[<System.AttributeUsage(System.AttributeTargets.Class)>]
type DefaultPropertyAttribute = class
    inherit Attribute

type DefaultPropertyAttribute = class
    inherit Attribute

Public NotInheritable Class DefaultPropertyAttribute
Inherits Attribute

继承

Object

Attribute

DefaultPropertyAttribute

属性

AttributeUsageAttribute

示例

以下示例定义名为 的 MyControl控件。 类标记为指定DefaultPropertyAttributeMyProperty为默认属性的 。

[DefaultProperty("MyProperty")]
ref class MyControl: public Control
{
public:

   property int MyProperty 
   {
      int get()
      {
         // Insert code here.
         return 0;
      }

      void set( int value )
      {
         // Insert code here.
      }
   }
   // Insert any additional code.
};

[DefaultProperty("MyProperty")]
 public class MyControl : Control {
 
    public int MyProperty {
       get {
          // Insert code here.
          return 0;
       }
       set {
          // Insert code here.
       }
    }
 
    // Insert any additional code.
 }

<DefaultProperty("MyProperty")> _
Public Class MyControl
    Inherits Control

    Public Property MyProperty() As Integer
        Get
            ' Insert code here.
            Return 0
        End Get
        Set
            ' Insert code here.
        End Set 
    End Property
    ' Insert any additional code.
End Class

下一个示例创建 的 MyControl实例。 然后，它获取 类的属性，提取 DefaultPropertyAttribute， 并输出默认属性的名称。

int main()
{
   // Creates a new control.
   Form1::MyControl^ myNewControl = gcnew Form1::MyControl;

   // Gets the attributes for the collection.
   AttributeCollection^ attributes = TypeDescriptor::GetAttributes( myNewControl );

   /* Prints the name of the default property by retrieving the 
       * DefaultPropertyAttribute from the AttributeCollection. */
   DefaultPropertyAttribute^ myAttribute = dynamic_cast<DefaultPropertyAttribute^>(attributes[ DefaultPropertyAttribute::typeid ]);
   Console::WriteLine( "The default property is: {0}", myAttribute->Name );
   return 0;
}

public static int Main() {
    // Creates a new control.
    MyControl myNewControl = new MyControl();
 
    // Gets the attributes for the collection.
    AttributeCollection attributes = TypeDescriptor.GetAttributes(myNewControl);
 
    /* Prints the name of the default property by retrieving the 
     * DefaultPropertyAttribute from the AttributeCollection. */
    DefaultPropertyAttribute myAttribute = 
       (DefaultPropertyAttribute)attributes[typeof(DefaultPropertyAttribute)];
    Console.WriteLine("The default property is: " + myAttribute.Name);
  
    return 0;
 }

Public Shared Function Main() As Integer
    ' Creates a new control.
    Dim myNewControl As New MyControl()
    
    ' Gets the attributes for the collection.
    Dim attributes As AttributeCollection = TypeDescriptor.GetAttributes(myNewControl)
    
    ' Prints the name of the default property by retrieving the
    ' DefaultPropertyAttribute from the AttributeCollection. 
    Dim myAttribute As DefaultPropertyAttribute = _
        CType(attributes(GetType(DefaultPropertyAttribute)), DefaultPropertyAttribute)
    Console.WriteLine(("The default property is: " + myAttribute.Name))
    Return 0
End Function 'Main

注解

Name使用 属性获取默认属性的名称。

有关更多信息，请参阅特性。

构造函数

字段

属性

方法

显式接口实现

适用于

另请参阅

• Attribute