AttributeCollection.Item[] Property

Definition

Namespace:

System.ComponentModel

Assembly:

System.ComponentModel.TypeConverter.dll

Gets the attribute with the specified index.

Overloads

Item[Int32]	Gets the attribute with the specified index number.
Item[Type]	Gets the attribute with the specified type.

Item[Int32]

Source:

AttributeCollection.cs

Gets the attribute with the specified index number.

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

Parameters

index

Int32

The zero-based index of AttributeCollection.

Property Value

Attribute

The Attribute with the specified index number.

Examples

The following code example uses the Item[] property to print the name of the Attribute specified by the index number in a text box. Because the index number is zero-based, this code example prints the name of the second Attribute in a text box. It assumes button1 and textBox1 have been created on a form.

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

Remarks

The index number is zero-based. Therefore, you must subtract 1 from the numerical position of a particular Attribute to access that Attribute. For example, to get the third Attribute, you need to specify myColl[2].

See also

• Attribute

Item[Type]

Source:

AttributeCollection.cs

Gets the attribute with the specified type.

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

Parameters

attributeType

Type

The Type of the Attribute to get from the collection.

Property Value

Attribute

The Attribute with the specified type or, if the attribute does not exist, the default value for the attribute type.

Examples

The following code example gets the DesignerAttribute from the collection and prints its value. It assumes that button1 and textBox1 have been created on a form.

For this code example to run, you must provide the fully qualified assembly name. For information about how to obtain the fully qualified assembly name, see Assembly Names.

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

Remarks

If the attribute does not exist in the collection, this property returns the default value for the attribute type.

See also

• Attribute