CategoryNameCollection Clase

Definición

Espacio de nombres:

System.Drawing.Design

Ensamblado:

System.Drawing.Common.dll

Paquete:

System.Drawing.Common v8.0.0

Source:

CategoryNameCollection.cs

Representa una colección de cadenas de nombre de categoría.

public ref class CategoryNameCollection sealed : System::Collections::ReadOnlyCollectionBase

public sealed class CategoryNameCollection : System.Collections.ReadOnlyCollectionBase

type CategoryNameCollection = class
    inherit ReadOnlyCollectionBase

Public NotInheritable Class CategoryNameCollection
Inherits ReadOnlyCollectionBase

Herencia

Object

ReadOnlyCollectionBase

CategoryNameCollection

Ejemplos

En el ejemplo de código siguiente se intenta recuperar IToolboxService cuando el control se encuentra en modo de diseño. IToolboxService Si se recupera , el código obtiene los nombres de cada categoría del cuadro de herramientas y dibuja cada nombre en la superficie del control.

#using <System.Windows.Forms.dll>
#using <System.Data.dll>
#using <System.Drawing.dll>
#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::ComponentModel;
using namespace System::ComponentModel::Design;
using namespace System::Drawing;
using namespace System::Drawing::Design;
using namespace System::Data;
using namespace System::Windows::Forms;

namespace ToolboxCategoryNamesControl
{
   public ref class ToolboxCategoryNamesControl: public System::Windows::Forms::UserControl
   {
   private:
      System::Drawing::Design::IToolboxService^ toolboxService;
      System::Drawing::Design::CategoryNameCollection^ categoryNames;

   public:
      ToolboxCategoryNamesControl()
      {
         this->BackColor = System::Drawing::Color::Beige;
         this->Name = "Category Names Display Control";
         this->Size = System::Drawing::Size( 264, 200 );
      }

      property System::ComponentModel::ISite^ Site 
      {
         // Obtain or reset IToolboxService^ reference on each siting of control.
         virtual System::ComponentModel::ISite^ get() override
         {
            return __super::Site;
         }

         virtual void set( System::ComponentModel::ISite^ value ) override
         {
            __super::Site = value;
            
            // If the component was sited, attempt to obtain
            // an IToolboxService^ instance.
            if ( __super::Site != nullptr )
            {
               toolboxService = dynamic_cast<IToolboxService^>(this->GetService( IToolboxService::typeid ));
               
               // If an IToolboxService* was located, update the category list.
               if ( toolboxService != nullptr )
                              categoryNames = toolboxService->CategoryNames;
            }
            else
                        toolboxService = nullptr;
         }
      }

   protected:
      [System::Security::Permissions::PermissionSetAttribute(System::Security::Permissions::SecurityAction::Demand, Name="FullTrust")]
      virtual void OnPaint( System::Windows::Forms::PaintEventArgs^ e ) override
      {
         if ( categoryNames != nullptr )
         {
            e->Graphics->DrawString( "IToolboxService category names list:", gcnew System::Drawing::Font( "Arial",9 ), Brushes::Black, 10, 10 );
            
            // categoryNames is a CategoryNameCollection obtained from
            // the IToolboxService*. CategoryNameCollection is a read-only
            // String* collection.
            // Output each category name in the CategoryNameCollection.
            for ( int i = 0; i < categoryNames->Count; i++ )
               e->Graphics->DrawString( categoryNames[ i ], gcnew System::Drawing::Font( "Arial",8 ), Brushes::Black, (float)10, (float)24 + (10 * i) );
         }
      }
   };
}

using System;
using System.Collections;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Drawing;
using System.Drawing.Design;
using System.Data;
using System.Windows.Forms;

namespace ToolboxCategoryNamesControl
{
    public class ToolboxCategoryNamesControl : System.Windows.Forms.UserControl
    {		
        private System.Drawing.Design.IToolboxService toolboxService;
        private System.Drawing.Design.CategoryNameCollection categoryNames;

        public ToolboxCategoryNamesControl()
        {
            this.BackColor = System.Drawing.Color.Beige;
            this.Name = "Category Names Display Control";
            this.Size = new System.Drawing.Size(264, 200);
        }

        // Obtain or reset IToolboxService reference on each siting of control.
        public override System.ComponentModel.ISite Site
        {
            get
            {
                return base.Site;
            }
            set
            {
                base.Site = value;

                // If the component was sited, attempt to obtain
                // an IToolboxService instance.
                if( base.Site != null )
                {
                    toolboxService = (IToolboxService)this.GetService(typeof(IToolboxService));
                    // If an IToolboxService was located, update the category list.
                    if( toolboxService != null )
                        categoryNames = toolboxService.CategoryNames;
                }
                else
                {
                    toolboxService = null;
                }
            }
        }

        protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
        {
            if( categoryNames != null )
            {
                e.Graphics.DrawString("IToolboxService category names list:", new Font("Arial", 9), Brushes.Black, 10, 10);
                // categoryNames is a CategoryNameCollection obtained from
                // the IToolboxService. CategoryNameCollection is a read-only
                // string collection.

                // Output each category name in the CategoryNameCollection.
                for( int i=0; i< categoryNames.Count; i++ )
                    e.Graphics.DrawString(categoryNames[i], new Font("Arial", 8), Brushes.Black, 10, 24+(10*i));
            }
        }
    }
}

Imports System.Collections
Imports System.ComponentModel
Imports System.ComponentModel.Design
Imports System.Drawing
Imports System.Drawing.Design
Imports System.Data
Imports System.Windows.Forms

<System.Security.Permissions.PermissionSetAttribute(System.Security.Permissions.SecurityAction.Demand, Name:="FullTrust")> _
Public Class ToolboxCategoryNamesControl
    Inherits System.Windows.Forms.UserControl
    Private toolboxService As System.Drawing.Design.IToolboxService
    Private categoryNames As System.Drawing.Design.CategoryNameCollection

    Public Sub New()
        Me.BackColor = System.Drawing.Color.Beige
        Me.Name = "Category Names Display Control"
        Me.Size = New System.Drawing.Size(264, 200)
    End Sub

    ' Obtain or reset IToolboxService reference on each siting of control.
    Public Overrides Property Site() As System.ComponentModel.ISite
        Get
            Return MyBase.Site
        End Get
        Set(ByVal Value As System.ComponentModel.ISite)
            MyBase.Site = Value

            ' If the component was sited, attempt to obtain 
            ' an IToolboxService instance.
            If (MyBase.Site IsNot Nothing) Then
                toolboxService = CType(Me.GetService(GetType(IToolboxService)), IToolboxService)
                ' If an IToolboxService was located, update the category list.
                If (toolboxService IsNot Nothing) Then
                    categoryNames = toolboxService.CategoryNames
                End If
            Else
                toolboxService = Nothing
            End If
        End Set
    End Property

    Protected Overrides Sub OnPaint(ByVal e As System.Windows.Forms.PaintEventArgs)
        If (categoryNames IsNot Nothing) Then
            e.Graphics.DrawString("IToolboxService category names list:", New Font("Arial", 9), Brushes.Black, 10, 10)

            ' categoryNames is a CategoryNameCollection obtained from 
            ' the IToolboxService. CategoryNameCollection is a read-only 
            ' string collection.                                
            ' Output each category name in the CategoryNameCollection.                                                
            Dim i As Integer
            For i = 0 To categoryNames.Count - 1
                e.Graphics.DrawString(categoryNames(i), New Font("Arial", 8), Brushes.Black, 10, 24 + 10 * i)
            Next i
        End If
    End Sub

End Class

Comentarios

Esta colección se usa para almacenar colecciones de nombres de categoría del cuadro de herramientas.

Constructores

CategoryNameCollection(CategoryNameCollection)	Inicializa una nueva instancia de la clase CategoryNameCollection utilizando la colección especificada.
CategoryNameCollection(String[])	Inicializa una nueva instancia de la clase CategoryNameCollection utilizando la matriz de nombres especificada.

Propiedades

Count	Obtiene el número de elementos contenidos en la instancia de ReadOnlyCollectionBase. (Heredado de ReadOnlyCollectionBase)
InnerList	Obtiene la lista de elementos incluidos en la instancia de ReadOnlyCollectionBase. (Heredado de ReadOnlyCollectionBase)
Item[Int32]	Obtiene el nombre de categoría en el índice especificado.

Métodos

Contains(String)	Indica si la categoría especificada está contenida en la colección.
CopyTo(String[], Int32)	Copia los elementos de la colección en el índice especificado de la matriz especificada.
Equals(Object)	Determina si el objeto especificado es igual que el objeto actual. (Heredado de Object)
GetEnumerator()	Devuelve un enumerador que recorre en iteración la instancia de ReadOnlyCollectionBase. (Heredado de ReadOnlyCollectionBase)
GetHashCode()	Sirve como la función hash predeterminada. (Heredado de Object)
GetType()	Obtiene el Type de la instancia actual. (Heredado de Object)
IndexOf(String)	Obtiene el índice del valor especificado.
MemberwiseClone()	Crea una copia superficial del Object actual. (Heredado de Object)
ToString()	Devuelve una cadena que representa el objeto actual. (Heredado de Object)

Métodos de extensión

Consulte también

• IToolboxService