AttributeCollection.Item[] 屬性

public:
 virtual property Attribute ^ default[int] { Attribute ^ get(int index); };

public virtual Attribute this[int index] { get; }

member this.Item(int) : Attribute

Default Public Overridable ReadOnly Property Item(index As Integer) As Attribute

參數

屬性值

該 具有 Attribute 指定的索引號。

範例

以下程式碼範例使用了 Item[] 該特性，將指定的名稱 Attribute 由索引號印入文字框中。 由於索引號是以零為基礎，此程式碼範例會在文字框中列印第二個 Attribute 索引的名稱。 它假設 button1 並 textBox1 被創造在一個形式上。

private:
   void PrintIndexItem()
   {
      // Creates a new collection and assigns it the attributes for button1.
      AttributeCollection^ attributes;
      attributes = TypeDescriptor::GetAttributes( button1 );
      
      // Prints the second attribute's name.
      textBox1->Text = attributes[ 1 ]->ToString();
   }

private void PrintIndexItem() {
    // Creates a new collection and assigns it the attributes for button1.
    AttributeCollection attributes;
    attributes = TypeDescriptor.GetAttributes(button1);

    // Prints the second attribute's name.
    textBox1.Text = attributes[1].ToString();
 }

Private Sub PrintIndexItem
    ' Creates a new collection and assigns it the attributes for button1.
    Dim attributes As AttributeCollection
    attributes = TypeDescriptor.GetAttributes(button1)

    ' Prints the second attribute's name.
    textBox1.Text = attributes(1).ToString
End Sub

備註

指數號是以零為基礎。 因此，你必須從某個特定 Attribute 點的數值位置減去1才能取得該點 Attribute。 例如，要得到第三 Attribute個 ，你需要指定 myColl[2]。

另請參閱

• Attribute

public:
 virtual property Attribute ^ default[Type ^] { Attribute ^ get(Type ^ attributeType); };

public virtual Attribute this[Type attributeType] { get; }

member this.Item(Type) : Attribute

Default Public Overridable ReadOnly Property Item(attributeType As Type) As Attribute

參數

屬性值

該 Attribute 屬性為指定型別，或若屬性不存在，則為該屬性類型的預設值。

範例

以下程式碼範例從集合中取得 並 DesignerAttribute 列印其值。 它假設 且 button1textBox1 已被創造在一個表單上。

要執行此程式碼範例，您必須提供完全限定的組合名稱。 關於如何取得完全合格的議會名稱，請參閱議會名稱。

void PrintIndexItem2()
{
   
   // Creates a new collection and assigns it the attributes for button1.
   AttributeCollection^ attributes;
   attributes = TypeDescriptor::GetAttributes( button1 );
   
   // Gets the designer attribute from the collection.
   DesignerAttribute^ myDesigner;
   
   // You must supply a valid fully qualified assembly name here. 
   myDesigner = dynamic_cast<DesignerAttribute^>(attributes[ Type::GetType(  "Assembly text name, Version, Culture, PublicKeyToken" ) ]);
   textBox1->Text = myDesigner->DesignerTypeName;
}

private void PrintIndexItem2() {
    // Creates a new collection and assigns it the attributes for button1.
    AttributeCollection attributes;
    attributes = TypeDescriptor.GetAttributes(button1);
 
    // Gets the designer attribute from the collection.
    DesignerAttribute myDesigner; 
    // You must supply a valid fully qualified assembly name here. 
    myDesigner = (DesignerAttribute)attributes[Type.GetType("Assembly text name, Version, Culture, PublicKeyToken")];
    textBox1.Text = myDesigner.DesignerTypeName;
 }

Private Sub PrintIndexItem2
    ' Creates a new collection and assigns it the attributes for button1.
    Dim attributes As AttributeCollection
    attributes = TypeDescriptor.GetAttributes(button1)

    ' Gets the designer attribute from the collection.
    Dim myDesigner As DesignerAttribute
            ' You must supply a valid fully qualified assembly name here. 
    myDesigner = CType(attributes(Type.GetType("Assembly text name, Version, Culture, PublicKeyToken")), DesignerAttribute)
    textBox1.Text = myDesigner.DesignerTypeName
End Sub

備註

如果該屬性不存在於集合中，這個屬性會回傳該屬性類型的預設值。

另請參閱

• Attribute