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ToolStripDropDownItem, classe

Remarque : cette classe est nouvelle dans le .NET Framework version 2.0.

Fournit des fonctionnalités de base pour les contrôles qui affichent un ToolStripDropDown lorsque l'utilisateur clique sur un contrôle ToolStripDropDownButton, ToolStripMenuItem, ou ToolStripSplitButton.

Espace de noms : System.Windows.Forms
Assembly : System.Windows.Forms (dans system.windows.forms.dll)

public abstract class ToolStripDropDownItem : ToolStripItem
public abstract class ToolStripDropDownItem extends ToolStripItem
public abstract class ToolStripDropDownItem extends ToolStripItem

ToolStripDropDownItem est la classe de base pour les contrôles ToolStripDropDownButton, ToolStripMenuItem et ToolStripSplitButton.

L'exemple de code suivant montre comment afficher et masquer des contrôles ToolStripMenuItem.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace ToolStripDropDownItemCS
{
    public class Form1 : Form
    {
        private ToolStrip toolStrip1;
        private StatusStrip statusStrip1;
        private ToolStripStatusLabel toolStripStatusLabel1;
        private ContextMenuStrip contextMenuStrip1;
        private ToolStripMenuItem menuItem1ToolStripMenuItem;
        private ToolStripMenuItem menuItem2ToolStripMenuItem;
        private ToolStripMenuItem subItemToolStripMenuItem;
        private ToolStripMenuItem subItem2ToolStripMenuItem;
        private Button showButton;
        private Button hideButton;
        private System.ComponentModel.IContainer components = null;

        public Form1()
        {
            InitializeComponent();
            this.InitializeToolStripDropDownItems();
        }

        // This utility method creates and initializes three 
        // ToolStripDropDownItem controls and adds them 
        // to the form's ToolStrip control.
        private void InitializeToolStripDropDownItems()
        {
            ToolStripDropDownButton b = new ToolStripDropDownButton("DropDownButton");
            b.DropDown = this.contextMenuStrip1;
            b.DropDownClosed += new EventHandler(toolStripDropDownItem_DropDownClosed);
            b.DropDownItemClicked += new ToolStripItemClickedEventHandler(toolStripDropDownItem_DropDownItemClicked);
            b.DropDownOpened += new EventHandler(toolStripDropDownItem_DropDownOpened);

            ToolStripMenuItem m = new ToolStripMenuItem("MenuItem");
            m.DropDown = this.contextMenuStrip1;
            m.DropDownClosed += new EventHandler(toolStripDropDownItem_DropDownClosed);
            m.DropDownItemClicked += new ToolStripItemClickedEventHandler(toolStripDropDownItem_DropDownItemClicked);
            m.DropDownOpened += new EventHandler(toolStripDropDownItem_DropDownOpened);

            ToolStripSplitButton sb = new ToolStripSplitButton("SplitButton");
            sb.DropDown = this.contextMenuStrip1;
            sb.DropDownClosed += new EventHandler(toolStripDropDownItem_DropDownClosed);
            sb.DropDownItemClicked += new ToolStripItemClickedEventHandler(toolStripDropDownItem_DropDownItemClicked);
            sb.DropDownOpened += new EventHandler(toolStripDropDownItem_DropDownOpened);

            this.toolStrip1.Items.AddRange(new ToolStripItem[] { b, m, sb });
        }

        // This method handles the DropDownOpened event from a 
        // ToolStripDropDownItem. It displays the value of the 
        // item's Text property in the form's StatusStrip control.
        void toolStripDropDownItem_DropDownOpened(object sender, EventArgs e)
        {
            ToolStripDropDownItem item = sender as ToolStripDropDownItem;

            string msg = String.Format("Item opened: {0}", item.Text);
            this.toolStripStatusLabel1.Text = msg;
        }

        // This method handles the DropDownItemClicked event from a 
        // ToolStripDropDownItem. It displays the value of the clicked
        // item's Text property in the form's StatusStrip control.
        void toolStripDropDownItem_DropDownItemClicked(object sender, ToolStripItemClickedEventArgs e)
        {
            string msg = String.Format("Item clicked: {0}", e.ClickedItem.Text);
            this.toolStripStatusLabel1.Text = msg;
        }

        // This method handles the DropDownClosed event from a 
        // ToolStripDropDownItem. It displays the value of the 
        // item's Text property in the form's StatusStrip control.
        void toolStripDropDownItem_DropDownClosed(object sender, EventArgs e)
        {
            ToolStripDropDownItem item = sender as ToolStripDropDownItem;

            string msg = String.Format("Item closed: {0}", item.Text);
            this.toolStripStatusLabel1.Text = msg;
        }

        // This method shows the drop-down for the first item
        // in the form's ToolStrip.
        private void showButton_Click(object sender, EventArgs e)
        {
            ToolStripDropDownItem item = this.toolStrip1.Items[0] as ToolStripDropDownItem;

            if (item.HasDropDownItems)
            {
                item.ShowDropDown();
            }
        }

        // This method hides the drop-down for the first item
        // in the form's ToolStrip.
        private void hideButton_Click(object sender, EventArgs e)
        {
            ToolStripDropDownItem item = this.toolStrip1.Items[0] as ToolStripDropDownItem;

            item.HideDropDown();
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows Form Designer generated code

        private void InitializeComponent()
        {
            this.components = new System.ComponentModel.Container();
            this.toolStrip1 = new System.Windows.Forms.ToolStrip();
            this.statusStrip1 = new System.Windows.Forms.StatusStrip();
            this.toolStripStatusLabel1 = new System.Windows.Forms.ToolStripStatusLabel();
            this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
            this.menuItem1ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.menuItem2ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.subItemToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.subItem2ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
            this.showButton = new System.Windows.Forms.Button();
            this.hideButton = new System.Windows.Forms.Button();
            this.statusStrip1.SuspendLayout();
            this.contextMenuStrip1.SuspendLayout();
            this.SuspendLayout();
            // 
            // toolStrip1
            // 
            this.toolStrip1.Location = new System.Drawing.Point(0, 0);
            this.toolStrip1.Name = "toolStrip1";
            this.toolStrip1.Size = new System.Drawing.Size(292, 25);
            this.toolStrip1.TabIndex = 0;
            this.toolStrip1.Text = "toolStrip1";
            // 
            // statusStrip1
            // 
            this.statusStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.toolStripStatusLabel1});
            this.statusStrip1.Location = new System.Drawing.Point(0, 251);
            this.statusStrip1.Name = "statusStrip1";
            this.statusStrip1.Size = new System.Drawing.Size(292, 22);
            this.statusStrip1.TabIndex = 1;
            this.statusStrip1.Text = "statusStrip1";
            // 
            // toolStripStatusLabel1
            // 
            this.toolStripStatusLabel1.Name = "toolStripStatusLabel1";
            this.toolStripStatusLabel1.Size = new System.Drawing.Size(38, 17);
            this.toolStripStatusLabel1.Text = "Ready";
            // 
            // contextMenuStrip1
            // 
            this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.menuItem1ToolStripMenuItem,
            this.menuItem2ToolStripMenuItem});
            this.contextMenuStrip1.Name = "contextMenuStrip1";
            this.contextMenuStrip1.RightToLeft = System.Windows.Forms.RightToLeft.No;
            this.contextMenuStrip1.Size = new System.Drawing.Size(146, 48);
            // 
            // menuItem1ToolStripMenuItem
            // 
            this.menuItem1ToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.subItemToolStripMenuItem});
            this.menuItem1ToolStripMenuItem.Name = "menuItem1ToolStripMenuItem";
            this.menuItem1ToolStripMenuItem.Size = new System.Drawing.Size(145, 22);
            this.menuItem1ToolStripMenuItem.Text = "Menu Item1";
            // 
            // menuItem2ToolStripMenuItem
            // 
            this.menuItem2ToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
            this.subItem2ToolStripMenuItem});
            this.menuItem2ToolStripMenuItem.Name = "menuItem2ToolStripMenuItem";
            this.menuItem2ToolStripMenuItem.Size = new System.Drawing.Size(145, 22);
            this.menuItem2ToolStripMenuItem.Text = "Menu Item 2";
            // 
            // subItemToolStripMenuItem
            // 
            this.subItemToolStripMenuItem.Name = "subItemToolStripMenuItem";
            this.subItemToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
            this.subItemToolStripMenuItem.Text = "Sub Item";
            // 
            // subItem2ToolStripMenuItem
            // 
            this.subItem2ToolStripMenuItem.Name = "subItem2ToolStripMenuItem";
            this.subItem2ToolStripMenuItem.Size = new System.Drawing.Size(152, 22);
            this.subItem2ToolStripMenuItem.Text = "Sub Item2";
            // 
            // showButton
            // 
            this.showButton.Location = new System.Drawing.Point(12, 180);
            this.showButton.Name = "showButton";
            this.showButton.Size = new System.Drawing.Size(75, 23);
            this.showButton.TabIndex = 2;
            this.showButton.Text = "Show";
            this.showButton.UseVisualStyleBackColor = true;
            this.showButton.Click += new System.EventHandler(this.showButton_Click);
            // 
            // hideButton
            // 
            this.hideButton.Location = new System.Drawing.Point(12, 209);
            this.hideButton.Name = "hideButton";
            this.hideButton.Size = new System.Drawing.Size(75, 23);
            this.hideButton.TabIndex = 3;
            this.hideButton.Text = "Hide";
            this.hideButton.UseVisualStyleBackColor = true;
            this.hideButton.Click += new System.EventHandler(this.hideButton_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(292, 273);
            this.Controls.Add(this.statusStrip1);
            this.Controls.Add(this.hideButton);
            this.Controls.Add(this.toolStrip1);
            this.Controls.Add(this.showButton);
            this.Name = "Form1";
            this.Text = "Form1";
            this.statusStrip1.ResumeLayout(false);
            this.statusStrip1.PerformLayout();
            this.contextMenuStrip1.ResumeLayout(false);
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion
    }

    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new Form1());
        }
    }
}

Les membres statiques publics (Shared en Visual Basic) de ce type sont thread-safe. Il n'est pas garanti que les membres d'instance soient thread-safe.

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile pour Pocket PC, Windows Mobile pour Smartphone, Windows Server 2003, Windows XP Édition Media Center, Windows XP Professionnel Édition x64, Windows XP SP2, Windows XP Starter Edition

Le .NET Framework ne prend pas en charge toutes les versions de chaque plate-forme. Pour obtenir la liste des versions prises en charge, consultez Configuration requise.

.NET Framework

Prise en charge dans : 2.0

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