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CategoryNameCollection Class

Represents a collection of category name strings.

Namespace:  System.Drawing.Design
Assembly:  System.Drawing (in System.Drawing.dll)

'Declaration
<PermissionSetAttribute(SecurityAction.LinkDemand, Name := "FullTrust")> _
Public NotInheritable Class CategoryNameCollection _
	Inherits ReadOnlyCollectionBase
'Usage
Dim instance As CategoryNameCollection

This collection is used to store collections of toolbox category names.

The following code example attempts to retrieve the IToolboxService when the control is sited in design mode. If the IToolboxService is retrieved, the code gets the names of each toolbox category and draws each name on the surface of the control.

Imports System
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

System.Object
  System.Collections.ReadOnlyCollectionBase
    System.Drawing.Design.CategoryNameCollection

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0
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