public class AnchorPanel    {        List<PanelMenu> lst = new List<PanelMenu>();        Control MenuPan { get; set; }        XtraScrollableControl XSControl;        public AnchorPanel(Panel PanMenu, XtraScrollableControl xtraScrollableControl)        {            MenuPan = PanMenu;            XSControl = xtraScrollableControl;            XSControl.Scroll += XSControl_Scroll;            XSControl.MouseWheel += XSControl_MouseWheel;            XSControl.SizeChanged += XSControl_SizeChanged;            XSControl.VerticalScroll.LargeChange = 20;        }        void XSControl_SizeChanged(object sender, EventArgs e)        {            if (LastAnchor != null && LastAnchorIniHeight < (sender as Control).Height)            {                LastAnchor.AnchorContainer.Height = (sender as Control).Height;            }        }        #region 容器滚动条移动事件        void XSControl_MouseWheel(object sender, MouseEventArgs e)        {            XSControl_Scroll(sender, null);        }        void XSControl_Scroll(object sender, XtraScrollEventArgs e)        {            CurrentLable = GetMenu((sender as XtraScrollableControl).VerticalScroll.Value);        }        #endregion        #region 添加锚点        PanelMenu LastAnchor;        int LastAnchorIniHeight;        /// <summary>        /// 添加锚点        /// </summary>        /// <param name="col">默认为控件的Top，Height,Text属性</param>        /// <param name="LastControl">是否是最后一一个锚点，为了保证最后一个锚点定位在顶部，需要动态设置最后一个锚点的高度，如果最后一个锚点区域高度小于容器高度，则设置其高度为容器高度</param>        public void AddAnchor(Control col, bool LastControl)        {            AddAnchor(col, col.Text, LastControl);        }        /// <summary>        /// 添加锚点        /// </summary>        /// <param name="col">默认为控件的Top，Height属性</param>        /// <param name="Caption">如果Caption为空则取Col的Text属性</param>        /// <param name="LastControl">是否是最后一一个锚点，为了保证最后一个锚点定位在顶部，需要动态设置最后一个锚点的高度，如果最后一个锚点区域高度小于容器高度，则设置其高度为容器高度</param>        public void AddAnchor(Control col, string Caption, bool LastControl)        {            Label lbl = new Label()            {                AutoSize = false,                Dock = System.Windows.Forms.DockStyle.Top,                Location = new System.Drawing.Point(0, 0),                /*lbl.Size = new System.Drawing.Size(219, 37);*/                Height = 37,                TabIndex = 0,                Text = Caption,                TextAlign = System.Drawing.ContentAlignment.MiddleRight,                Tag = col.Top.ToString()            };            IniEventLable(lbl);            if (LastControl)            {                LastAnchor = new PanelMenu(lbl, col);                LastAnchorIniHeight = col.Height;                lst.Add(LastAnchor);            }            else                lst.Add(new PanelMenu(lbl, col));            MenuPan.Controls.Add(lbl);            MenuPan.Controls.SetChildIndex(lbl, 0);        }        #endregion        /// <summary>        /// 根据滚动条位置获得对应的锚点空间        /// </summary>        /// <param name="ScrollValue">滚动条的值</param>        /// <returns></returns>        public Label GetMenu(int ScrollValue)        {            Label lbl = null;            foreach (PanelMenu menu in lst)            {                if (menu.Top <= ScrollValue && menu.Buttom > ScrollValue)                    lbl = menu.Label;            }            if (lbl == null)            {                return null;            }            return lbl;        }        /// <summary>        /// 初始化锚点的事件        /// </summary>        /// <param name="lbl"></param>        void IniEventLable(Label lbl)        {            lbl.MouseEnter += lbl_MouseEnter;            lbl.MouseLeave += lbl_MouseLeave;            lbl.MouseClick += lbl_MouseClick;        }        #region 锚点单击        Label _CurrentLable;        public Label CurrentLable        {            set            {                if (value =http://www.mamicode.com/= null) return;                if (_CurrentLable == value) return;                value.BackColor = Color.LightPink;                if (_CurrentLable != null)                    _CurrentLable.BackColor = Color.Transparent;                _CurrentLable = value;            }            get { return _CurrentLable; } //{ return CurrentLable; }        }        /// <summary>        /// 鼠标点击        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        void lbl_MouseClick(object sender, MouseEventArgs e)        {            if (e.Button == MouseButtons.Left)            {                CurrentLable = sender as Label;                XSControl.VerticalScroll.Value = int.Parse((sender as Label).Tag.ToString()) - CurrentLable.Top;            }        }        /// <summary>        /// 设置鼠标进入时背景色        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void lbl_MouseEnter(object sender, EventArgs e)        {            if ((sender as Label) != CurrentLable)                (sender as Label).BackColor = Color.FromArgb(0xFF, 0xFF, 0x99);        }        /// <summary>        /// 鼠标移出，还原背景色        /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        private void lbl_MouseLeave(object sender, EventArgs e)        {            if ((sender as Label) != CurrentLable)                (sender as Label).BackColor = Color.Transparent;        }        #endregion    }    public class PanelMenu    {        public PanelMenu(Label label, Control anchorContainer)        {            Label = label;            AnchorContainer = anchorContainer;            Top = anchorContainer.Top;        }        public PanelMenu(Label label, int top, int height)        {            Label = label;            Top = top;            Height = height;        }        /// <summary>        /// 锚点定位的容器对象，通常是Panel        /// </summary>        public Control AnchorContainer { get; set; }        /// <summary>        /// 锚点，Lable        /// </summary>        public Label Label { get; set; }        public int Top        {            get;            set;        }        private int _height;        public int Height        {            get            {                if (AnchorContainer != null)                    return AnchorContainer.Height;                else                    return _height;            }            set { _height = value; }        }        public int Buttom { get { return Top + Height; } }    }

AnchorPanel APanel;       private void Form3_Load(object sender, EventArgs e)       {           APanel = new AnchorPanel(panel1, xtraScrollableControl1);           labelControl1.Text = groupControl6.Height.ToString();           if (groupControl6.Height < xtraScrollableControl1.Height)               groupControl6.Height = xtraScrollableControl1.Height;           panel1.Controls.Clear();           APanel.AddAnchor(groupControl1, false);           APanel.AddAnchor(groupControl2, false);           APanel.AddAnchor(groupControl3, false);           APanel.AddAnchor(groupControl4, false);           APanel.AddAnchor(groupControl5, false);           APanel.AddAnchor(groupControl6, true);                                                                      APanel.CurrentLable = APanel.GetMenu(0);                                                                   }