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CategoryNameCollection Class

Represents a collection of category name strings.

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

[PermissionSetAttribute(SecurityAction.LinkDemand, Name = "FullTrust")]
public sealed class CategoryNameCollection : ReadOnlyCollectionBase

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.

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
    [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name = "FullTrust")] 
	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
                return base.Site;
                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;                   
                    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));                


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