C# WinForm 窗体最小化之后 点击最大化时 只显示整个窗体的一角，不显示全部

Posted 2023-05-17

代码是这样的：
private void pic_zx_Click(object sender, EventArgs e)//这是点击最小化按钮

this.WindowState = FormWindowState.Minimized;
this.Hide();


//下面是双击任务栏图标
this.Visible = true;
this.WindowState = FormWindowState.Normal;
最小化到系统托盘中
不行呀，还是不行，都试过了

双击最小化按钮时只用写成
this.Hide();
双击任务栏时代码改成
this.Show();
这样显示出来的就是你原来窗体最小化时的样子 参考技术A 是吧它缩放在任务栏图标还是系统托盘？
我看你的代码thsi.hide()想必你想是当用户点击最小化的时候把它放到系统托盘中把？应为你this.hide（）在任务栏是不显示的
若果是这样那你this.WindowState = FormWindowState.Minimized;
就是多余的了
直接this.Visible = false;
然后再双击托盘图标时this.Visible = true; 参考技术B Hidden=true;

Winform 最小化 最大化 关闭 点击任务栏隐藏显示 点击鼠标左键移动窗体

一 最大化

二 最小化

三 关闭

四 点击任务栏隐藏显示

五 点击鼠标左键移动窗体

六 阴影效果鼠标左键移动窗口

  #region UI设置  最大化、最小化、关闭、鼠标移动窗口、点击任务栏切换窗口

            this.pnlMin.MouseHover += new EventHandler(pnlMin_MouseMove);//最小化按钮的鼠标经过样式改变事件
            this.pnlMin.MouseLeave += new EventHandler(pnlMin_MouseLeave);//最小化按钮的鼠标离开样式改变事件
            this.pnlMin.Click += new EventHandler(pnlMin_Click);//最小化按钮单击事件

            this.pnlMax.MouseHover += new EventHandler(pnlMax_MouseMove);//最小化按钮的鼠标经过样式改变事件
            this.pnlMax.MouseLeave += new EventHandler(pnlMax_MouseLeave);//最小化按钮的鼠标离开样式改变事件
            this.pnlMax.Click += new EventHandler(pnlMax_Click);//最小化按钮单击事件

            this.pnlClose.MouseHover += new EventHandler(pnlClose_MouseMove);//鼠标经过关闭按钮时的样式改变
            this.pnlClose.MouseLeave += new EventHandler(pnlClose_MouseLeave);//鼠标离开关闭按钮事件
            this.pnlClose.Click += new EventHandler(pnlClose_Click);//关闭按钮的单击事件

            this.pnlHead1.MouseDown += new MouseEventHandler(sysSet_MouseDown);  //鼠标移动窗体位置
            this.pnlHead1.MouseMove += new MouseEventHandler(sysSet_MouseMove);//鼠标移动窗体位置
            this.pnlHead1.MouseUp += new MouseEventHandler(sysSet_MouseUp);//鼠标移动窗体位置

            #endregion

　　

 

  #region UI设置  最大化、最小化、关闭、鼠标移动窗口、点击任务栏切换窗口

        #region 单击任务栏，最小化
        protected override CreateParams CreateParams //点击任务栏实现最小化与还原  
        {
            get
            {
                const int WS_MINIMIZEBOX = 0x00020000;
                CreateParams cp = base.CreateParams;
                cp.Style = cp.Style | WS_MINIMIZEBOX;   // 允许最小化操作    
                return cp;
            }
        }

        #endregion

        #region 最小化按钮
        //最小化按钮的鼠标经过改变样式事件
        private void pnlMin_MouseMove(object sender, EventArgs e)
        {
            tip.SetToolTip(this.pnlMin, "最小化");
            this.pnlMin.BackColor = Color.FromArgb(30, 255, 255, 255);
        }
        //最小化按钮的鼠标离开改变样式事件
        private void pnlMin_MouseLeave(object sender, EventArgs e)
        {
            this.pnlMin.BackColor = Color.Transparent;
        }
        //最小化按钮的单击事件
        private void pnlMin_Click(object sender, EventArgs e)
        {
            if (WindowState != FormWindowState.Minimized)
            {
                WindowState = FormWindowState.Minimized;
            }
        }

        #endregion

        #region 最大化

        private void pnlMax_MouseMove(object sender, EventArgs e)
        {
            tip.SetToolTip(this.pnlMax, "最大化");
            if (WindowState == FormWindowState.Maximized)
            {
                tip.SetToolTip(this.pnlMax, "恢复");
            }
            this.pnlMax.BackColor = Color.FromArgb(30, 0, 0, 0);
        }
        //最小化按钮的鼠标离开改变样式事件
        private void pnlMax_MouseLeave(object sender, EventArgs e)
        {
            this.pnlMax.BackColor = Color.Transparent;
        }
        //最小化按钮的单击事件
        private void pnlMax_Click(object sender, EventArgs e)
        {
            int h = Screen.PrimaryScreen.WorkingArea.Height;
            int w = Screen.PrimaryScreen.WorkingArea.Width;
            if (WindowState == FormWindowState.Normal)
            {
                //this.MaximumSize = new Size(w, h);//设置窗体最大化为满屏
                this.MaximumSize = new Size(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height);
                this.pnlMax.BackgroundImage = global::Cnwin.Apps.Properties.Resources.max;
                //this.tbCnt.Dock = DockStyle.Right;
                //this.pnlCnt.Height = h - 10;
                //this.pnlCnt.Width = w - 2;
                //this.sptCnt.Width = 260;
                this.pnlMax.Invalidate();
                WindowState = FormWindowState.Maximized;
                //PnlRslt.Left = (w / 2);
                //sptCnt.SplitterDistance = 80;
                //dgvRslt.Width = w - 100;
            }
            else
            {
                this.FormBorderStyle = FormBorderStyle.None;
                this.pnlMax.BackgroundImage = global::Cnwin.Apps.Properties.Resources.max16;
                //this.pnlCnt.Height = 629;
                //this.pnlCnt.Width = 964;
                this.MaximumSize = new Size(966, 630);
                this.pnlMax.Invalidate();
                WindowState = FormWindowState.Normal;
                this.Height = 656;
                //PnlRslt.Left = 420;
                //sptCnt.SplitterDistance = 80;
                //dgvRslt.Width = 840;
                //dgvRslt.Height = 452;
                //pnlPage.Top = 508;
            }
            //int width = 0; int clmSum = this.dgvRslt.Columns.Count;
            ////对于DataGridView的每一个列都调整
            //for (int i = 0; i < clmSum; i++)
            //{
            //    //将每一列都调整为自动适应模式
            //    this.dgvRslt.AutoResizeColumn(i, DataGridViewAutoSizeColumnMode.AllCells);
            //    //记录整个DataGridView的宽度
            //    width += this.dgvRslt.Columns[i].Width;
            //}
            ////判断调整后的宽度与原来设定的宽度的关系，如果是调整后的宽度大于原来设定的宽度，
            ////则将DataGridView的列自动调整模式设置为显示的列即可，
            ////如果是小于原来设定的宽度，将模式改为填充。
            //if (width > this.dgvRslt.Size.Width)
            //{
            //    this.dgvRslt.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.DisplayedCells;
            //}
            //else
            //{
            //    //this.dgvRslt.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
            //}
            ////this.MaximizedBounds = Screen.PrimaryScreen.WorkingArea;
        }

        #endregion

        #region 关闭按钮
        //鼠标经过关闭按钮时触发样式改变
        private void pnlClose_MouseMove(object sender, EventArgs e)
        {
            tip.SetToolTip(this.pnlClose, "关闭");
            this.pnlClose.BackColor = Color.Red;
        }

        //鼠标离开关闭按钮触发样式改变
        private void pnlClose_MouseLeave(object sender, EventArgs e)
        {
            this.pnlClose.BackColor = Color.Transparent;
        }

        protected void pnlClose_Click(object sender, EventArgs e)
        {
            FrmMonitor lg = new FrmMonitor();
            lg.Dispose();
            Application.Exit();
        }

        #endregion

        #region 鼠标移动窗体移动

        //窗体拖动
        bool isMouseDown = false;
        Point cwpt = new Point(); //当前窗体位置
        Point cmpt = new Point(); //当前鼠标的按下位置
        private void sysSet_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                isMouseDown = true;
                cwpt = this.Location;
                cmpt = System.Windows.Forms.Control.MousePosition;
            }
        }
        private void sysSet_MouseUp(object sender, MouseEventArgs e)
        {
            isMouseDown = false;
        }
        private void sysSet_MouseMove(object sender, MouseEventArgs e)
        {
            int rangeX = 0, rangeY = 0; //计算当前鼠标光标的位移，让窗体进行相同大小的位移
            if (isMouseDown)
            {
                Point pt = System.Windows.Forms.Control.MousePosition;
                rangeX = cmpt.X - pt.X;
                rangeY = cmpt.Y - pt.Y;
                this.Location = new Point(cwpt.X - rangeX, cwpt.Y - rangeY);
            }
        }

        #endregion

        #endregion

 六 阴影效果鼠标左键移动窗口

1）引用API

 //窗体阴影API
        private const int CS_DropSHADOW = 0x20000;//窗体边框阴影
        private const int WM_MOVING = 0x0216;//窗体移动限制不超过屏幕
        private const int GCL_STYLE = (-26);
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int SetClassLong(IntPtr hwnd, int nIndex, int dwNewLong);
        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int GetClassLong(IntPtr hwnd, int nIndex);
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
        [DllImport("user32.dll", EntryPoint = "GetWindowLong", CharSet = CharSet.Auto)]
        public static extern int GetWindowLong(HandleRef hWnd, int nIndex);

        [DllImport("user32.dll", EntryPoint = "SetWindowLong", CharSet = CharSet.Auto)]
        public static extern IntPtr SetWindowLong(HandleRef hWnd, int nIndex, int dwNewLong);

        private const int WM_SYSCOMMAND = 0x0112;//点击窗口左上角那个图标时的系统信息  
        private const int SC_MOVE = 0xF010;//移动信息  
        private const int HTCAPTION = 0x0002;//表示鼠标在窗口标题栏时的系统信息  
        private const int WM_NCHITTEST = 0x84;//鼠标在窗体客户区（除了标题栏和边框以外的部分）时发送的消息  
        private const int HTCLIENT = 0x1;//表示鼠标在窗口客户区的系统消息  
        private const int SC_MAXIMIZE = 0xF030;//最大化信息  
        private const int SC_MINIMIZE = 0xF020;//最小化信息  

2）定义鼠标事件

 //窗体拖动
        bool isMouseDown = false;
        //Point cwpt = new Point(); //当前窗体位置
        //Point cmpt = new Point(); //当前鼠标的按下位置
        private void sysSet_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                isMouseDown = true;
                //cwpt = this.Location;
                //cmpt = System.Windows.Forms.Control.MousePosition;
            }
        }
        private void sysSet_MouseUp(object sender, MouseEventArgs e)
        {
            //if (WindowState == FormWindowState.Normal)
            //{
            //    this.Location = cwpt;               
            //    this.pnlMax.BackgroundImage = global::Cnwin.Apps.Properties.Resources.max12;
            //}
            //else
            //{
            //    this.pnlMax.BackgroundImage = global::Cnwin.Apps.Properties.Resources.min16w;
            //}
            isMouseDown = false;
        }
        private void sysSet_MouseMove(object sender, MouseEventArgs e)
        {
            //int rangeX = 0, rangeY = 0; //计算当前鼠标光标的位移，让窗体进行相同大小的位移
            //if (isMouseDown)
            //{
            //    Point pt = System.Windows.Forms.Control.MousePosition;
            //    rangeX = cmpt.X - pt.X;
            //    rangeY = cmpt.Y - pt.Y;
            //    this.Location = new Point(cwpt.X - rangeX, cwpt.Y - rangeY);
            //}

            //常量    
            int WM_SYSCOMMAND = 0x0112;
            //窗体移动    
            int SC_MOVE = 0xF010;
            int HTCAPTION = 0x0002;

            ReleaseCapture();
            SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);

            if (WindowState == FormWindowState.Normal && isMouseDown)
            {
                this.pnlMax.BackgroundImage = global::Cnwin.Apps.Properties.Resources.max16;
            }
            else if (isMouseDown)
            {
                this.pnlMax.BackgroundImage = global::Cnwin.Apps.Properties.Resources.max12;
            }
        }