DockPanel 右键增加关闭，除此之外全部关闭的功能

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;namespace WeifenLuo.WinFormsUI.Docking{    public class DockContentEx : WeifenLuo.WinFormsUI.Docking.DockContent    {        private ContextMenuStrip contextMenuStrip1;        private ToolStripMenuItem 关闭ToolStripMenuItem;        private ToolStripMenuItem 全部关闭ToolStripMenuItem;        private ToolStripMenuItem 除此之外全部关闭ToolStripMenuItem;        private IContainer components;            public DockContentEx()        {            //ContextMenuStrip cms = new System.Windows.Forms.ContextMenuStrip();            //ToolStripMenuItem tsmiClose = new System.Windows.Forms.ToolStripMenuItem();            //ToolStripMenuItem tsmiCloseAll = new System.Windows.Forms.ToolStripMenuItem();            //tsmiClose.Name = "cms";            //tsmiClose.Size = new System.Drawing.Size(98, 22);            //tsmiClose.Text = "关闭";            //tsmiClose.Click += new System.EventHandler(this.tsmiClose_Click);            //cms.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {tsmiClose});            //cms.Name = "tsmiClose";            //cms.Size = new System.Drawing.Size(99, 26);            InitializeComponent();            this.TabPageContextMenuStrip = contextMenuStrip1;        }        private void InitializeComponent()        {            this.components = new System.ComponentModel.Container();            this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);            this.关闭ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();            this.除此之外全部关闭ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();            this.全部关闭ToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();            this.contextMenuStrip1.SuspendLayout();            this.SuspendLayout();            //             // contextMenuStrip1            //             this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {            this.关闭ToolStripMenuItem,            this.除此之外全部关闭ToolStripMenuItem,            this.全部关闭ToolStripMenuItem});            this.contextMenuStrip1.Name = "contextMenuStrip1";            this.contextMenuStrip1.ShowImageMargin = false;            this.contextMenuStrip1.Size = new System.Drawing.Size(142, 92);            //             // 关闭ToolStripMenuItem            //             this.关闭ToolStripMenuItem.Name = "关闭ToolStripMenuItem";            this.关闭ToolStripMenuItem.Size = new System.Drawing.Size(141, 22);            this.关闭ToolStripMenuItem.Text = "关闭";            this.关闭ToolStripMenuItem.Click += new System.EventHandler(this.关闭ToolStripMenuItem_Click);            //             // 除此之外全部关闭ToolStripMenuItem            //             this.除此之外全部关闭ToolStripMenuItem.Name = "除此之外全部关闭ToolStripMenuItem";            this.除此之外全部关闭ToolStripMenuItem.Size = new System.Drawing.Size(141, 22);            this.除此之外全部关闭ToolStripMenuItem.Text = "除此之外全部关闭";            this.除此之外全部关闭ToolStripMenuItem.Click += new System.EventHandler(this.除此之外全部关闭ToolStripMenuItem_Click);            //             // 全部关闭ToolStripMenuItem            //             this.全部关闭ToolStripMenuItem.Name = "全部关闭ToolStripMenuItem";            this.全部关闭ToolStripMenuItem.Size = new System.Drawing.Size(141, 22);            this.全部关闭ToolStripMenuItem.Text = "全部关闭";            this.全部关闭ToolStripMenuItem.Click += new System.EventHandler(this.全部关闭ToolStripMenuItem_Click);            //             // DockContentEx            //             this.ClientSize = new System.Drawing.Size(292, 273);            this.Font = new System.Drawing.Font("SimSun", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));            this.Name = "DockContentEx";            this.contextMenuStrip1.ResumeLayout(false);            this.ResumeLayout(false);        }        private void 关闭ToolStripMenuItem_Click(object sender, EventArgs e)        {            this.Close();        }        private void 除此之外全部关闭ToolStripMenuItem_Click(object sender, EventArgs e)        {            IDockContent[] documents = DockPanel.DocumentsToArray();            foreach (IDockContent content in documents)            {                if (!content.Equals(this))                {                    content.DockHandler.Close();                                    }            }        }        private void 全部关闭ToolStripMenuItem_Click(object sender, EventArgs e)        {            IDockContent[] documents = DockPanel.DocumentsToArray();            foreach (IDockContent content in documents)            {                content.DockHandler.Close();            }        }    }}

其他准备以dockpanel方式打开的form都改为继承自上面这个DockPanelEx类