c# 可移动可改变大小的控件

因为业务需要，百度了个可移动可改变大小的控件，然后自己修改了下，功能类似vs的设计面板中的功能差不多，可拖拽，改变大小

拖动的

 public class MoveControl
    {
        #region 自定义事件
        /// <summary>
        /// 控件移动时触发事件
        /// </summary>
        public event EventHandler ControlMoving;
        /// <summary>
        /// 控件移动完成触发事件
        /// </summary>
        public event EventHandler ControlMoved;
        /// <summary>
        /// 控件改变大小时触发事件
        /// </summary>
        public event EventHandler ControlResizing;
        /// <summary>
        /// 控件改变大小完成触发事件
        /// </summary>
        public event EventHandler ControlResized;
        /// <summary>
        /// 选中控件时发生
        /// </summary>
        public event EventHandler ControlSelected;
        #endregion
        /// <summary>
        /// 是否可调整尺寸
        /// </summary>
        bool m_blnResize = true;
        MoveControlType m_moveType;
        #region Constructors
        /// <summary>
        /// 功能描述:构造函数
        /// 作　　者:beck.huang
        /// 创建日期:2018-07-07 09:20:41
        /// 任务编号:中餐
        /// </summary>
        /// <param name="ctrl">ctrl</param>
        /// <param name="blnResize">是否可调整尺寸</param>
        /// <param name="moveType">移动模式</param>
        public MoveControl(Control ctrl, bool blnResize = true, MoveControlType moveType = MoveControlType.ANY)
        {
            m_blnResize = blnResize;
            m_moveType = moveType;
            currentControl = ctrl;
            AddEvents();
        }
        #endregion

        #region Fields
        private Control currentControl; //传入的控件
        private Point pPoint; //上个鼠标坐标
        private Point cPoint; //当前鼠标坐标
        FrameControl fc;//边框控件
        #endregion

        #region Properties

        #endregion

        #region Methods
        /// <summary>
        /// 挂载事件
        /// </summary>
        private void AddEvents()
        {
            currentControl.MouseClick -= new MouseEventHandler(MouseClick);
            currentControl.MouseClick += new MouseEventHandler(MouseClick);
            currentControl.MouseDown -= new MouseEventHandler(MouseDown);
            currentControl.MouseDown += new MouseEventHandler(MouseDown);
            currentControl.MouseMove -= new MouseEventHandler(MouseMove);
            currentControl.MouseMove += new MouseEventHandler(MouseMove);
            currentControl.MouseUp -= new MouseEventHandler(MouseUp);
            currentControl.MouseUp += new MouseEventHandler(MouseUp);
        }

        /// <summary>
        /// 绘制拖拉时的黑色边框
        /// </summary>
        public static void DrawDragBound(Control ctrl)
        {
            ctrl.Refresh();
            Graphics g = ctrl.CreateGraphics();
            int width = ctrl.Width;
            int height = ctrl.Height;
            Point[] ps = new Point[]{new Point(,),new Point(width -,),
                new Point(width -,height -),new Point(,height-),new Point(,)};
            g.DrawLines(new Pen(Color.Black), ps);
        }

        #endregion

        #region Events
        /// <summary>
        /// 鼠标单击事件：用来显示边框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void MouseClick(object sender, MouseEventArgs e)
        {
            if (m_blnResize)
            {
                this.currentControl.Parent.Refresh();//刷新父容器，清除掉其他控件的边框
                for (int i = currentControl.Parent.Controls.Count-; i >=; i--)
                {
                    Control item = currentControl.Parent.Controls[i];
                    if (item is FrameControl)
                    {
                        currentControl.Parent.Controls.RemoveAt(i);
                    }
                }

                this.currentControl.BringToFront();
                fc = new FrameControl(this.currentControl);
                fc.ControlResized += fc_ControlResized;
                fc.ControlResizing += fc_ControlResizing;
                this.currentControl.Parent.Controls.Add(fc);
                fc.Visible = true;
                fc.Draw();
            }
            if (ControlSelected != null)
            {
                ControlSelected(this.currentControl, e);
            }
        }

        /// <summary>
        /// 功能描述:控件改变大小时事件
        /// 作　　者:beck.huang
        /// 创建日期:2018-07-07 09:51:27
        /// 任务编号:中餐
        /// </summary>
        /// <param name="sender">sender</param>
        /// <param name="e">e</param>
        void fc_ControlResizing(object sender, EventArgs e)
        {
            if (ControlResizing != null)
            {
                ControlResizing(sender, e);
            }
        }

        /// <summary>
        /// 功能描述:控件改变大小完成事件
        /// 作　　者:beck.huang
        /// 创建日期:2018-07-07 09:51:12
        /// 任务编号:中餐
        /// </summary>
        /// <param name="sender">sender</param>
        /// <param name="e">e</param>
        void fc_ControlResized(object sender, EventArgs e)
        {
            if (ControlResized != null)
            {
                ControlResized(sender, e);
            }
        }

        /// <summary>
        /// 鼠标按下事件：记录当前鼠标相对窗体的坐标
        /// </summary>
        void MouseDown(object sender, MouseEventArgs e)
        {
            pPoint = Cursor.Position;
        }

        /// <summary>
        /// 鼠标移动事件：让控件跟着鼠标移动
        /// </summary>
        void MouseMove(object sender, MouseEventArgs e)
        {
            if (m_moveType != MoveControlType.NONE)
            {
                if (m_moveType == MoveControlType.ANY)
                {
                    Cursor.Current = Cursors.SizeAll;
                }
                else if (m_moveType == MoveControlType.VERTICAL)
                {
                    Cursor.Current = Cursors.HSplit;
                }
                else
                {
                    Cursor.Current = Cursors.VSplit;
                }
                // Cursor.Current = Cursors.SizeAll; //当鼠标处于控件内部时，显示光标样式为SizeAll
                //当鼠标左键按下时才触发
                if (e.Button == MouseButtons.Left)
                {
                    MoveControl.DrawDragBound(this.currentControl);
                    if (fc != null) fc.Visible = false; //先隐藏
                    cPoint = Cursor.Position;//获得当前鼠标位置

                    int x = cPoint.X - pPoint.X;
                    int y = cPoint.Y - pPoint.Y;
                    if (m_moveType == MoveControlType.ANY)
                    {
                        currentControl.Location = new Point(currentControl.Location.X + x, currentControl.Location.Y + y);
                    }
                    else if (m_moveType == MoveControlType.VERTICAL)
                    {
                        currentControl.Location = new Point(currentControl.Location.X, currentControl.Location.Y + y);
                    }
                    else
                    {
                        currentControl.Location = new Point(currentControl.Location.X + x, currentControl.Location.Y);
                    }
                    pPoint = cPoint;
                    if (ControlMoving != null)
                    {
                        ControlMoving(currentControl, e);
                    }
                }
            }
        }

        /// <summary>
        /// 鼠标弹起事件：让自定义的边框出现
        /// </summary>
        void MouseUp(object sender, MouseEventArgs e)
        {
            this.currentControl.Refresh();
            if (fc != null)
            {
                fc.Visible = true;
                fc.Draw();
            }
            if (ControlMoved != null)
            {
                ControlMoved(currentControl, e);
            }
        }
        #endregion
    }
    /// <summary>
    /// 移动控件模式
    /// </summary>
    public enum MoveControlType
    {
        /// <summary>
        /// 任意
        /// </summary>
        ANY = ,
        /// <summary>
        /// 垂直
        /// </summary>
        VERTICAL,
        /// <summary>
        /// 水平
        /// </summary>
        HORIZONTAL,
        /// <summary>
        /// 不可移动
        /// </summary>
        NONE
    }

改变大小的类

public class FrameControl : UserControl
    {
        /// <summary>
        /// 控件改变大小时触发事件
        /// </summary>
        public event EventHandler ControlResizing;
        /// <summary>
        /// 控件改变大小完成触发事件
        /// </summary>
        public event EventHandler ControlResized;
        #region Constructors
        /// <summary>
        /// 构造函数
        /// </summary>
        public FrameControl(Control ctrl)
        {
            baseControl = ctrl;
            AddEvents();
            CreateBounds();
        }
        #endregion

        #region Fields
        const int Band = ; //调整大小的响应边框
        private int MinWidth = ; //最小宽度
        private int MinHeight = ;//最小高度
        Size square = new Size(Band, Band);//小矩形大小
        Control baseControl; //基础控件，即被包围的控件
        Rectangle[] smallRects = new Rectangle[];//边框中的八个小圆圈
        Rectangle[] sideRects = new Rectangle[];//四条边框，用来做响应区域
        Point[] linePoints = new Point[];//四条边，用于画虚线
        Graphics g; //画图板
        Rectangle ControlRect; //控件包含边框的区域
        private Point pPoint; //上个鼠标坐标
        private Point cPoint; //当前鼠标坐标
        private MousePosOnCtrl mpoc;

        #endregion

        #region Properties
        /// <summary>
        /// 鼠标在控件中位置
        /// </summary>
        enum MousePosOnCtrl
        {
            NONE = ,
            TOP = ,
            RIGHT = ,
            BOTTOM = ,
            LEFT = ,
            TOPLEFT = ,
            TOPRIGHT = ,
            BOTTOMLEFT = ,
            BOTTOMRIGHT = ,
        }
        #endregion

        #region Methods
        /// <summary>
        /// 加载事件
        /// </summary>
        private void AddEvents()
        {
            this.Name = "FrameControl" + baseControl.Name;
            this.MouseDown += new MouseEventHandler(FrameControl_MouseDown);
            this.MouseMove += new MouseEventHandler(FrameControl_MouseMove);
            this.MouseUp += new MouseEventHandler(FrameControl_MouseUp);
        }

        #region 创建边框
        /// <summary>
        /// 建立控件可视区域
        /// </summary>
        private void CreateBounds()
        {
            //创建边界
            int X = baseControl.Bounds.X - square.Width - ;
            int Y = baseControl.Bounds.Y - square.Height - ;
            int Height = baseControl.Bounds.Height + (square.Height * ) + ;
            int Width = baseControl.Bounds.Width + (square.Width * ) + ;
            this.Bounds = new Rectangle(X, Y, Width, Height);
            this.BringToFront();
            SetRectangles();
            //设置可视区域
            this.Region = new Region(BuildFrame());
            g = this.CreateGraphics();
        }

        /// <summary>
        /// 设置定义8个小矩形的范围
        /// </summary>
        void SetRectangles()
        {
            //左上
            smallRects[] = new Rectangle(new Point(, ), square);
            //右上
            smallRects[] = new Rectangle(new Point(this.Width - square.Width - , ), square);
            //左下
            smallRects[] = new Rectangle(new Point(, this.Height - square.Height - ), square);
            //右下
            smallRects[] = new Rectangle(new Point(this.Width - square.Width - , this.Height - square.Height - ), square);
            //上中
            smallRects[] = new Rectangle(new Point(this.Width /  - , ), square);
            //下中
            smallRects[] = new Rectangle(new Point(this.Width /  - , this.Height - square.Height - ), square);
            //左中
            smallRects[] = new Rectangle(new Point(, this.Height /  - ), square);
            //右中
            smallRects[] = new Rectangle(new Point(square.Width + baseControl.Width + , this.Height /  - ), square);

            //四条边线
            //左上
            linePoints[] = new Point(square.Width / , square.Height / );
            //右上
            linePoints[] = new Point(this.Width - square.Width /  - , square.Height / );
            //右下
            linePoints[] = new Point(this.Width - square.Width /  - , this.Height - square.Height / );
            //左下
            linePoints[] = new Point(square.Width / , this.Height - square.Height /  - );
            //左上
            linePoints[] = new Point(square.Width / , square.Height / );

            //整个包括周围边框的范围
            ControlRect = new Rectangle(new Point(, ), this.Bounds.Size);
        }

        /// <summary>
        /// 设置边框控件可视区域
        /// </summary>
        /// <returns></returns>
        private GraphicsPath BuildFrame()
        {
            GraphicsPath path = new GraphicsPath();
            //上边框
            sideRects[] = new Rectangle(, , this.Width - square.Width - , square.Height + );
            //左边框
            sideRects[] = new Rectangle(, square.Height + , square.Width + , this.Height - square.Height - );
            //下边框
            sideRects[] = new Rectangle(square.Width + , this.Height - square.Height - , this.Width - square.Width - , square.Height + );
            //右边框
            sideRects[] = new Rectangle(this.Width - square.Width - , , square.Width + , this.Height - square.Height - );

            path.AddRectangle(sideRects[]);
            path.AddRectangle(sideRects[]);
            path.AddRectangle(sideRects[]);
            path.AddRectangle(sideRects[]);
            return path;
        }
        #endregion

        /// <summary>
        /// 绘图
        /// </summary>
        public void Draw()
        {
            this.BringToFront();
            //g.FillRectangles(Brushes.LightGray, sideRects); //填充四条边框的内部
            Pen pen = new Pen(Color.Black);
            pen.DashStyle = DashStyle.Dot;//设置为虚线,用虚线画四边，模拟微软效果
            g.DrawLines(pen, linePoints);//绘制四条边线
            g.FillRectangles(Brushes.White, smallRects); //填充8个小矩形的内部
            foreach (Rectangle smallRect in smallRects)
            {
                g.DrawEllipse(Pens.Black, smallRect);    //绘制8个小椭圆
            }
            //g.DrawRectangles(Pens.Black, smallRects);  //绘制8个小矩形的黑色边线
        }

        /// <summary>
        /// 设置光标状态
        /// </summary>
        public bool SetCursorShape(int x, int y)
        {
            Point point = new Point(x, y);
            if (!ControlRect.Contains(point))
            {
                Cursor.Current = Cursors.Arrow;
                return false;
            }
            else if (smallRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeNWSE;
                mpoc = MousePosOnCtrl.TOPLEFT;
            }
            else if (smallRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeNESW;
                mpoc = MousePosOnCtrl.TOPRIGHT;
            }
            else if (smallRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeNESW;
                mpoc = MousePosOnCtrl.BOTTOMLEFT;
            }
            else if (smallRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeNWSE;
                mpoc = MousePosOnCtrl.BOTTOMRIGHT;
            }
            else if (sideRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeNS;
                mpoc = MousePosOnCtrl.TOP;
            }
            else if (sideRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeWE;
                mpoc = MousePosOnCtrl.LEFT;
            }
            else if (sideRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeNS;
                mpoc = MousePosOnCtrl.BOTTOM;
            }
            else if (sideRects[].Contains(point))
            {
                Cursor.Current = Cursors.SizeWE;
                mpoc = MousePosOnCtrl.RIGHT;
            }
            else
            {
                Cursor.Current = Cursors.Arrow;
            }
            return true;
        }

        /// <summary>
        /// 控件移动
        /// </summary>
        private void ControlMove(MouseEventArgs e)
        {
            cPoint = Cursor.Position;
            int x = cPoint.X - pPoint.X;
            int y = cPoint.Y - pPoint.Y;
            switch (this.mpoc)
            {
                case MousePosOnCtrl.TOP:
                    if (baseControl.Height - y > MinHeight)
                    {
                        baseControl.Top += y;
                        baseControl.Height -= y;
                    }
                    else
                    {
                        baseControl.Top -= MinHeight - baseControl.Height;
                        baseControl.Height = MinHeight;
                    }
                    break;
                case MousePosOnCtrl.BOTTOM:
                    if (baseControl.Height + y > MinHeight)
                    {
                        baseControl.Height += y;
                    }
                    else
                    {
                        baseControl.Height = MinHeight;
                    }
                    break;
                case MousePosOnCtrl.LEFT:
                    if (baseControl.Width - x > MinWidth)
                    {
                        baseControl.Left += x;
                        baseControl.Width -= x;
                    }
                    else
                    {
                        baseControl.Left -= MinWidth - baseControl.Width;
                        baseControl.Width = MinWidth;
                    }

                    break;
                case MousePosOnCtrl.RIGHT:
                    if (baseControl.Width + x > MinWidth)
                    {
                        baseControl.Width += x;
                    }
                    else
                    {
                        baseControl.Width = MinWidth;
                    }
                    break;
                case MousePosOnCtrl.TOPLEFT:
                    if (baseControl.Height - y > MinHeight)
                    {
                        baseControl.Top += y;
                        baseControl.Height -= y;
                    }
                    else
                    {
                        baseControl.Top -= MinHeight - baseControl.Height;
                        baseControl.Height = MinHeight;
                    }
                    if (baseControl.Width - x > MinWidth)
                    {
                        baseControl.Left += x;
                        baseControl.Width -= x;
                    }
                    else
                    {
                        baseControl.Left -= MinWidth - baseControl.Width;
                        baseControl.Width = MinWidth;
                    }
                    break;
                case MousePosOnCtrl.TOPRIGHT:
                    if (baseControl.Height - y > MinHeight)
                    {
                        baseControl.Top += y;
                        baseControl.Height -= y;
                    }
                    else
                    {
                        baseControl.Top -= MinHeight - baseControl.Height;
                        baseControl.Height = MinHeight;
                    }
                    if (baseControl.Width + x > MinWidth)
                    {
                        baseControl.Width += x;
                    }
                    else
                    {
                        baseControl.Width = MinWidth;
                    }
                    break;
                case MousePosOnCtrl.BOTTOMLEFT:
                    if (baseControl.Height + y > MinHeight)
                    {
                        baseControl.Height += y;
                    }
                    else
                    {
                        baseControl.Height = MinHeight;
                    }
                    if (baseControl.Width - x > MinWidth)
                    {
                        baseControl.Left += x;
                        baseControl.Width -= x;
                    }
                    else
                    {
                        baseControl.Left -= MinWidth - baseControl.Width;
                        baseControl.Width = MinWidth;
                    }
                    break;
                case MousePosOnCtrl.BOTTOMRIGHT:
                    if (baseControl.Height + y > MinHeight)
                    {
                        baseControl.Height += y;
                    }
                    else
                    {
                        baseControl.Height = MinHeight;
                    }
                    if (baseControl.Width + x > MinWidth)
                    {
                        baseControl.Width += x;
                    }
                    else
                    {
                        baseControl.Width = MinWidth;
                    }
                    break;

            }
            pPoint = Cursor.Position;
            if (ControlResizing != null)
            {
                ControlResizing(baseControl, e);
            }
        }

        #endregion

        #region Events
        /// <summary>
        /// 鼠标按下事件：记录当前鼠标相对窗体的坐标
        /// </summary>
        void FrameControl_MouseDown(object sender, MouseEventArgs e)
        {
            pPoint = Cursor.Position;
        }

        /// <summary>
        /// 鼠标移动事件：让控件跟着鼠标移动
        /// </summary>
        void FrameControl_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                this.Visible = false;
                MoveControl.DrawDragBound(baseControl);
                ControlMove(e);
            }
            else
            {
                this.Visible = true;
                SetCursorShape(e.X, e.Y); //更新鼠标指针样式
            }
        }

        /// <summary>
        /// 鼠标弹起事件：让自定义的边框出现
        /// </summary>
        void FrameControl_MouseUp(object sender, MouseEventArgs e)
        {
            this.baseControl.Refresh(); //刷掉黑色边框
            this.Visible = true;
            CreateBounds();
            Draw();
            if (ControlResized != null)
            {
                ControlResized(this.baseControl, e);
            }
        }
        #endregion

        private void InitializeComponent()
        {
            this.SuspendLayout();
            //
            // FrameControl
            //
            this.BackColor = System.Drawing.Color.Transparent;
            this.Name = "FrameControl";
            this.ResumeLayout(false);

        }
    }

使用方法

private void Form1_Load(object sender, EventArgs e)
        {
            //this.TransparencyKey = SystemColors.Control;
            foreach (Control subCtrl in this.Controls)
            {
              MoveControl mc=  new MoveControl(subCtrl,false, MoveControlType.HORIZONTAL);
              mc.ControlMoving += mc_ControlMoving;
              mc.ControlMoved += mc_ControlMoved;
              mc.ControlResized += mc_ControlResized;
              mc.ControlResizing += mc_ControlResizing;
            }
        }

        void mc_ControlResizing(object sender, EventArgs e)
        {
            Console.WriteLine("Resizing");
        }

        void mc_ControlResized(object sender, EventArgs e)
        {
            Console.WriteLine("Resized");
        }

        void mc_ControlMoved(object sender, EventArgs e)
        {
            Console.WriteLine("moved");
        }

        void mc_ControlMoving(object sender, EventArgs e)
        {
            Console.WriteLine("moving");
        }

效果如下