CategoryNameCollection 類別

定義

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

繼承

Object

ReadOnlyCollectionBase

CategoryNameCollection

範例

以下程式碼範例嘗試在控制項置於設計模式時擷取。IToolboxService 若被檢索， IToolboxService 程式碼會取得每個工具箱類別的名稱，並在控制項表面繪製每個名稱。

#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

備註

此集合用於儲存工具箱類別名稱的集合。

另請參閱

• IToolboxService