你如何在WPF中进行AppBar对接（屏幕边缘，如WinAmp）？

Question

是否有关于在WPF中进行AppBar对接（例如锁定到屏幕边缘）的完整指导？ 我知道需要进行InterOp调用，但我正在寻找基于简单WPF表单的概念证明，或者可以使用的组件化版本。

相关资源：

• http://www.codeproject.com/KB/dotnet/AppBar.aspx
• http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/05c73c9c-e85d-4ecd-b9b6-4c714a65e72b/

Answer 1

请注意：此问题收集了大量反馈，下面的一些人已经提出了很多观点或修正。 因此，虽然我会在这里保留代码（并可能更新它），但我还在github上创建了一个WpfAppBar项目 。 随意发送拉请求。

该项目也构建为WpfAppBar nuget包

---

我从问题（ http://www.codeproject.com/KB/dotnet/AppBar.aspx ）中提供的第一个链接中获取代码并对其进行修改以执行以下两项操作：

1. 使用WPF
2. “独立” - 如果您将此单个文件放在项目中，则可以调用AppBarFunctions.SetAppBar（...）而无需对窗口进行任何进一步修改。

此方法不会创建基类。

要使用，只需从普通wpf窗口中的任何位置调用此代码（例如按钮单击或初始化）。 请注意，在窗口初始化之后才能调用它，如果尚未创建HWND（如在构造函数中），则会发生错误。

使窗口成为appbar：

AppBarFunctions.SetAppBar( this, ABEdge.Right );

将窗口恢复到正常窗口：

AppBarFunctions.SetAppBar( this, ABEdge.None );

这是文件的完整代码 - 请注意，您需要将第7行的命名空间更改为适当的名称。

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Threading;

namespace AppBarApplication
{    
    public enum ABEdge : int
    {
        Left = 0,
        Top,
        Right,
        Bottom,
        None
    }

    internal static class AppBarFunctions
    {
        [StructLayout(LayoutKind.Sequential)]
        private struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct APPBARDATA
        {
            public int cbSize;
            public IntPtr hWnd;
            public int uCallbackMessage;
            public int uEdge;
            public RECT rc;
            public IntPtr lParam;
        }

        private enum ABMsg : int
        {
            ABM_NEW = 0,
            ABM_REMOVE,
            ABM_QUERYPOS,
            ABM_SETPOS,
            ABM_GETSTATE,
            ABM_GETTASKBARPOS,
            ABM_ACTIVATE,
            ABM_GETAUTOHIDEBAR,
            ABM_SETAUTOHIDEBAR,
            ABM_WINDOWPOSCHANGED,
            ABM_SETSTATE
        }
        private enum ABNotify : int
        {
            ABN_STATECHANGE = 0,
            ABN_POSCHANGED,
            ABN_FULLSCREENAPP,
            ABN_WINDOWARRANGE
        }

        [DllImport("SHELL32", CallingConvention = CallingConvention.StdCall)]
        private static extern uint SHAppBarMessage(int dwMessage, ref APPBARDATA pData);

        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        private static extern int RegisterWindowMessage(string msg);

        private class RegisterInfo
        {
            public int CallbackId { get; set; }
            public bool IsRegistered { get; set; }
            public Window Window { get; set; }
            public ABEdge Edge { get; set; }
            public WindowStyle OriginalStyle { get; set; }            
            public Point OriginalPosition { get; set; }
            public Size OriginalSize { get; set; }
            public ResizeMode OriginalResizeMode { get; set; }


            public IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, 
                                    IntPtr lParam, ref bool handled)
            {
                if (msg == CallbackId)
                {
                    if (wParam.ToInt32() == (int)ABNotify.ABN_POSCHANGED)
                    {
                        ABSetPos(Edge, Window);
                        handled = true;
                    }
                }
                return IntPtr.Zero;
            }

        }
        private static Dictionary<Window, RegisterInfo> s_RegisteredWindowInfo 
            = new Dictionary<Window, RegisterInfo>();
        private static RegisterInfo GetRegisterInfo(Window appbarWindow)
        {
            RegisterInfo reg;
            if( s_RegisteredWindowInfo.ContainsKey(appbarWindow))
            {
                reg = s_RegisteredWindowInfo[appbarWindow];
            }
            else
            {
                reg = new RegisterInfo()
                    {
                        CallbackId = 0,
                        Window = appbarWindow,
                        IsRegistered = false,
                        Edge = ABEdge.Top,
                        OriginalStyle = appbarWindow.WindowStyle,                        
                        OriginalPosition =new Point( appbarWindow.Left, appbarWindow.Top),
                        OriginalSize = 
                            new Size( appbarWindow.ActualWidth, appbarWindow.ActualHeight),
                        OriginalResizeMode = appbarWindow.ResizeMode,
                    };
                s_RegisteredWindowInfo.Add(appbarWindow, reg);
            }
            return reg;
        }

        private static void RestoreWindow(Window appbarWindow)
        {
            RegisterInfo info = GetRegisterInfo(appbarWindow);

            appbarWindow.WindowStyle = info.OriginalStyle;            
            appbarWindow.ResizeMode = info.OriginalResizeMode;
            appbarWindow.Topmost = false;

            Rect rect = new Rect(info.OriginalPosition.X, info.OriginalPosition.Y, 
                info.OriginalSize.Width, info.OriginalSize.Height);
            appbarWindow.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle,
                    new ResizeDelegate(DoResize), appbarWindow, rect);

        }

        public static void SetAppBar(Window appbarWindow, ABEdge edge)
        {
            RegisterInfo info = GetRegisterInfo(appbarWindow);
            info.Edge = edge;

            APPBARDATA abd = new APPBARDATA();
            abd.cbSize = Marshal.SizeOf(abd);
            abd.hWnd = new WindowInteropHelper(appbarWindow).Handle;

            if( edge == ABEdge.None)
            {
                if( info.IsRegistered)
                {
                    SHAppBarMessage((int)ABMsg.ABM_REMOVE, ref abd);
                    info.IsRegistered = false;
                }
                RestoreWindow(appbarWindow);
                return;
            }

            if (!info.IsRegistered)
            {
                info.IsRegistered = true; 
                info.CallbackId = RegisterWindowMessage("AppBarMessage");
                abd.uCallbackMessage = info.CallbackId;

                uint ret = SHAppBarMessage((int)ABMsg.ABM_NEW, ref abd);

                HwndSource source = HwndSource.FromHwnd(abd.hWnd);
                source.AddHook(new HwndSourceHook(info.WndProc));
            }

            appbarWindow.WindowStyle = WindowStyle.None;            
            appbarWindow.ResizeMode = ResizeMode.NoResize;
            appbarWindow.Topmost = true;

            ABSetPos(info.Edge, appbarWindow);                
        }

        private delegate void ResizeDelegate(Window appbarWindow, Rect rect);
        private static void DoResize(Window appbarWindow, Rect rect)
        {
            appbarWindow.Width = rect.Width;
            appbarWindow.Height = rect.Height;
            appbarWindow.Top = rect.Top;
            appbarWindow.Left = rect.Left;
        }



        private static void ABSetPos(ABEdge edge, Window appbarWindow)
        {
            APPBARDATA barData = new APPBARDATA();
            barData.cbSize = Marshal.SizeOf(barData);
            barData.hWnd = new WindowInteropHelper(appbarWindow).Handle;
            barData.uEdge = (int)edge;

            if (barData.uEdge == (int)ABEdge.Left || barData.uEdge == (int)ABEdge.Right)
            {
                barData.rc.top = 0;
                barData.rc.bottom = (int)SystemParameters.PrimaryScreenHeight;
                if (barData.uEdge == (int)ABEdge.Left)
                {
                    barData.rc.left = 0;
                    barData.rc.right = (int)Math.Round(appbarWindow.ActualWidth);
                }
                else
                {
                    barData.rc.right = (int)SystemParameters.PrimaryScreenWidth;
                    barData.rc.left = barData.rc.right - (int)Math.Round(appbarWindow.ActualWidth);
                }
            }
            else
            {
                barData.rc.left = 0;
                barData.rc.right = (int)SystemParameters.PrimaryScreenWidth;
                if (barData.uEdge == (int)ABEdge.Top)
                {
                    barData.rc.top = 0;
                    barData.rc.bottom = (int)Math.Round(appbarWindow.ActualHeight);
                }
                else
                {
                    barData.rc.bottom = (int)SystemParameters.PrimaryScreenHeight;
                    barData.rc.top = barData.rc.bottom - (int)Math.Round(appbarWindow.ActualHeight);
                }
            }

            SHAppBarMessage((int)ABMsg.ABM_QUERYPOS, ref barData);
            SHAppBarMessage((int)ABMsg.ABM_SETPOS, ref barData);

            Rect rect = new Rect((double)barData.rc.left, (double)barData.rc.top, 
                (double)(barData.rc.right - barData.rc.left), (double)(barData.rc.bottom - barData.rc.top));
            //This is done async, because WPF will send a resize after a new appbar is added.  
            //if we size right away, WPFs resize comes last and overrides us.
            appbarWindow.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle, 
                new ResizeDelegate(DoResize), appbarWindow, rect);
        }
    }
}

Answer 2

我修改了Philip Rieck的代码（顺便说一下，非常感谢），可以在多种显示设置下工作。 这是我的解决方案。

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Threading;

namespace AppBarApplication
{
    public enum ABEdge : int
    {
        Left = 0,
        Top,
        Right,
        Bottom,
        None
    }

    internal static class AppBarFunctions
    {
        [StructLayout(LayoutKind.Sequential)]
        private struct RECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct APPBARDATA
        {
            public int cbSize;
            public IntPtr hWnd;
            public int uCallbackMessage;
            public int uEdge;
            public RECT rc;
            public IntPtr lParam;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct MONITORINFO
        {
          public int cbSize;
          public RECT  rcMonitor;
          public RECT  rcWork;
          public int dwFlags;
        }

        private enum ABMsg : int
        {
            ABM_NEW = 0,
            ABM_REMOVE,
            ABM_QUERYPOS,
            ABM_SETPOS,
            ABM_GETSTATE,
            ABM_GETTASKBARPOS,
            ABM_ACTIVATE,
            ABM_GETAUTOHIDEBAR,
            ABM_SETAUTOHIDEBAR,
            ABM_WINDOWPOSCHANGED,
            ABM_SETSTATE
        }
        private enum ABNotify : int
        {
            ABN_STATECHANGE = 0,
            ABN_POSCHANGED,
            ABN_FULLSCREENAPP,
            ABN_WINDOWARRANGE
        }

        [DllImport("SHELL32", CallingConvention = CallingConvention.StdCall)]
        private static extern uint SHAppBarMessage(int dwMessage, ref APPBARDATA pData);

        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        private static extern int RegisterWindowMessage(string msg);

        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        private static extern IntPtr MonitorFromWindow(IntPtr hwnd, uint dwFlags);

        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        private static extern bool GetMonitorInfo(IntPtr hMonitor, ref MONITORINFO mi);


        private const int MONITOR_DEFAULTTONEAREST = 0x2;
        private const int MONITORINFOF_PRIMARY = 0x1;

        private class RegisterInfo
        {
            public int CallbackId { get; set; }
            public bool IsRegistered { get; set; }
            public Window Window { get; set; }
            public ABEdge Edge { get; set; }
            public WindowStyle OriginalStyle { get; set; }
            public Point OriginalPosition { get; set; }
            public Size OriginalSize { get; set; }
            public ResizeMode OriginalResizeMode { get; set; }


            public IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam,
                                    IntPtr lParam, ref bool handled)
            {
                if (msg == CallbackId)
                {
                    if (wParam.ToInt32() == (int)ABNotify.ABN_POSCHANGED)
                    {
                        ABSetPos(Edge, Window);
                        handled = true;
                    }
                }
                return IntPtr.Zero;
            }

        }
        private static Dictionary<Window, RegisterInfo> s_RegisteredWindowInfo
            = new Dictionary<Window, RegisterInfo>();
        private static RegisterInfo GetRegisterInfo(Window appbarWindow)
        {
            RegisterInfo reg;
            if (s_RegisteredWindowInfo.ContainsKey(appbarWindow))
            {
                reg = s_RegisteredWindowInfo[appbarWindow];
            }
            else
            {
                reg = new RegisterInfo()
                {
                    CallbackId = 0,
                    Window = appbarWindow,
                    IsRegistered = false,
                    Edge = ABEdge.Top,
                    OriginalStyle = appbarWindow.WindowStyle,
                    OriginalPosition = new Point(appbarWindow.Left, appbarWindow.Top),
                    OriginalSize =
                        new Size(appbarWindow.ActualWidth, appbarWindow.ActualHeight),
                    OriginalResizeMode = appbarWindow.ResizeMode,
                };
                s_RegisteredWindowInfo.Add(appbarWindow, reg);
            }
            return reg;
        }

        private static void RestoreWindow(Window appbarWindow)
        {
            RegisterInfo info = GetRegisterInfo(appbarWindow);

            appbarWindow.WindowStyle = info.OriginalStyle;
            appbarWindow.ResizeMode = info.OriginalResizeMode;
            appbarWindow.Topmost = false;

            Rect rect = new Rect(info.OriginalPosition.X, info.OriginalPosition.Y,
                info.OriginalSize.Width, info.OriginalSize.Height);
            appbarWindow.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle,
                    new ResizeDelegate(DoResize), appbarWindow, rect);

        }

        public static void SetAppBar(Window appbarWindow, ABEdge edge)
        {
            RegisterInfo info = GetRegisterInfo(appbarWindow);

            info.Edge = edge;

            APPBARDATA abd = new APPBARDATA();
            abd.cbSize = Marshal.SizeOf(abd);
            abd.hWnd = new WindowInteropHelper(appbarWindow).Handle;

            if (edge == ABEdge.None)
            {
                if (info.IsRegistered)
                {
                    SHAppBarMessage((int)ABMsg.ABM_REMOVE, ref abd);
                    info.IsRegistered = false;
                }
                RestoreWindow(appbarWindow);
                return;
            }

            if (!info.IsRegistered)
            {
                info.IsRegistered = true;
                info.CallbackId = RegisterWindowMessage("AppBarMessage");
                abd.uCallbackMessage = info.CallbackId;

                uint ret = SHAppBarMessage((int)ABMsg.ABM_NEW, ref abd);

                HwndSource source = HwndSource.FromHwnd(abd.hWnd);
                source.AddHook(new HwndSourceHook(info.WndProc));
            }

            appbarWindow.WindowStyle = WindowStyle.None;
            appbarWindow.ResizeMode = ResizeMode.NoResize;
            appbarWindow.Topmost = true;

            ABSetPos(info.Edge, appbarWindow);
        }

        private delegate void ResizeDelegate(Window appbarWindow, Rect rect);
        private static void DoResize(Window appbarWindow, Rect rect)
        {
            appbarWindow.Width = rect.Width;
            appbarWindow.Height = rect.Height;
            appbarWindow.Top = rect.Top;
            appbarWindow.Left = rect.Left;
        }

        private static void GetActualScreenData(ABEdge edge, Window appbarWindow, ref int leftOffset, ref int topOffset, ref int actualScreenWidth, ref int actualScreenHeight)
        {
            IntPtr handle = new WindowInteropHelper(appbarWindow).Handle;
            IntPtr monitorHandle = MonitorFromWindow(handle, MONITOR_DEFAULTTONEAREST);

            MONITORINFO mi = new MONITORINFO();
            mi.cbSize = Marshal.SizeOf(mi);

            if (GetMonitorInfo(monitorHandle, ref mi))
            {
                if (mi.dwFlags == MONITORINFOF_PRIMARY)
                {
                    return;
                }
                leftOffset = mi.rcWork.left;
                topOffset = mi.rcWork.top;
                actualScreenWidth = mi.rcWork.right - leftOffset;
                actualScreenHeight = mi.rcWork.bottom - mi.rcWork.top;
            }
        }

        private static void ABSetPos(ABEdge edge, Window appbarWindow)
        {
            APPBARDATA barData = new APPBARDATA();
            barData.cbSize = Marshal.SizeOf(barData);
            barData.hWnd = new WindowInteropHelper(appbarWindow).Handle;
            barData.uEdge = (int)edge;

            int leftOffset = 0;
            int topOffset = 0;
            int actualScreenWidth = (int)SystemParameters.PrimaryScreenWidth;
            int actualScreenHeight = (int)SystemParameters.PrimaryScreenHeight;

            GetActualScreenData(edge, appbarWindow, ref leftOffset, ref topOffset, ref actualScreenWidth, ref actualScreenHeight);

            if (barData.uEdge == (int)ABEdge.Left || barData.uEdge == (int)ABEdge.Right)
            {
                barData.rc.top = topOffset;
                barData.rc.bottom = actualScreenHeight;
                if (barData.uEdge == (int)ABEdge.Left)
                {
                    barData.rc.left = leftOffset;
                    barData.rc.right = (int)Math.Round(appbarWindow.ActualWidth) + leftOffset;
                }
                else
                {
                    barData.rc.right = actualScreenWidth + leftOffset;
                    barData.rc.left = barData.rc.right - (int)Math.Round(appbarWindow.ActualWidth);
                }
            }
            else
            {
                barData.rc.left = leftOffset;
                barData.rc.right = actualScreenWidth + leftOffset;
                if (barData.uEdge == (int)ABEdge.Top)
                {
                    barData.rc.top = topOffset;
                    barData.rc.bottom = (int)Math.Round(appbarWindow.ActualHeight) + topOffset;
                }
                else
                {
                    barData.rc.bottom = actualScreenHeight + topOffset;
                    barData.rc.top = barData.rc.bottom - (int)Math.Round(appbarWindow.ActualHeight);
                }
            }

            SHAppBarMessage((int)ABMsg.ABM_QUERYPOS, ref barData);
            SHAppBarMessage((int)ABMsg.ABM_SETPOS, ref barData);

            Rect rect = new Rect((double)barData.rc.left, (double)barData.rc.top,
                (double)(barData.rc.right - barData.rc.left), (double)(barData.rc.bottom - barData.rc.top));
            //This is done async, because WPF will send a resize after a new appbar is added.  
            //if we size right away, WPFs resize comes last and overrides us.
            appbarWindow.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle,
                new ResizeDelegate(DoResize), appbarWindow, rect);
        }
    }
}

Answer 3

对不起我的英文...这是Philip Rieck的解决方案，有一些修正。 它正确地适用于任务栏位置和大小更改。

using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
using System.Windows.Threading;

namespace wpf_appbar
{
    public enum ABEdge : int
    {
        Left,
        Top,
        Right,
        Bottom,
        None
    }

    internal static class AppBarFunctions
    {
        [StructLayout(LayoutKind.Sequential)]
        private struct RECT
        {
            public int Left;
            public int Top;
            public int Right;
            public int Bottom;
            public RECT(Rect r)
            {
                Left = (int)r.Left;
                Right = (int)r.Right;
                Top = (int)r.Top;
                Bottom = (int)r.Bottom;
            }
            public static bool operator ==(RECT r1, RECT r2)
            {
                return r1.Bottom == r2.Bottom && r1.Left == r2.Left && r1.Right == r2.Right && r1.Top == r2.Top;
            }
            public static bool operator !=(RECT r1, RECT r2)
            {
                return !(r1 == r2);
            }
            public override bool Equals(object obj)
            {
                return base.Equals(obj);
            }
            public override int GetHashCode()
            {
                return base.GetHashCode();
            }
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct APPBARDATA
        {
            public int cbSize;
            public IntPtr hWnd;
            public int uCallbackMessage;
            public int uEdge;
            public RECT rc;
            public IntPtr lParam;
        }

        private enum ABMsg : int
        {
            ABM_NEW = 0,
            ABM_REMOVE,
            ABM_QUERYPOS,
            ABM_SETPOS,
            ABM_GETSTATE,
            ABM_GETTASKBARPOS,
            ABM_ACTIVATE,
            ABM_GETAUTOHIDEBAR,
            ABM_SETAUTOHIDEBAR,
            ABM_WINDOWPOSCHANGED,
            ABM_SETSTATE
        }
        private enum ABNotify : int
        {
            ABN_STATECHANGE = 0,
            ABN_POSCHANGED,
            ABN_FULLSCREENAPP,
            ABN_WINDOWARRANGE
        }

        private enum TaskBarPosition : int
        {
            Left,
            Top,
            Right,
            Bottom
        }

        [StructLayout(LayoutKind.Sequential)]
        class TaskBar
        {
            public TaskBarPosition Position;
            public TaskBarPosition PreviousPosition;
            public RECT Rectangle;
            public RECT PreviousRectangle;
            public int Width;
            public int PreviousWidth;
            public int Height;
            public int PreviousHeight;
            public TaskBar()
            {
                Refresh();
            }
            public void Refresh()
            {
                APPBARDATA msgData = new APPBARDATA();
                msgData.cbSize = Marshal.SizeOf(msgData);
                SHAppBarMessage((int)ABMsg.ABM_GETTASKBARPOS, ref msgData);
                PreviousPosition = Position;
                PreviousRectangle = Rectangle;
                PreviousHeight = Height;
                PreviousWidth = Width;
                Rectangle = msgData.rc;
                Width = Rectangle.Right - Rectangle.Left;
                Height = Rectangle.Bottom - Rectangle.Top;
                int h = (int)SystemParameters.PrimaryScreenHeight;
                int w = (int)SystemParameters.PrimaryScreenWidth;
                if (Rectangle.Bottom == h && Rectangle.Top != 0) Position = TaskBarPosition.Bottom;
                else if (Rectangle.Top == 0 && Rectangle.Bottom != h) Position = TaskBarPosition.Top;
                else if (Rectangle.Right == w && Rectangle.Left != 0) Position = TaskBarPosition.Right;
                else if (Rectangle.Left == 0 && Rectangle.Right != w) Position = TaskBarPosition.Left;
            }
        }

        [DllImport("SHELL32", CallingConvention = CallingConvention.StdCall)]
        private static extern uint SHAppBarMessage(int dwMessage, ref APPBARDATA pData);

        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        private static extern int RegisterWindowMessage(string msg);

        private class RegisterInfo
        {
            public int CallbackId { get; set; }
            public bool IsRegistered { get; set; }
            public Window Window { get; set; }
            public ABEdge Edge { get; set; }
            public ABEdge PreviousEdge { get; set; }
            public WindowStyle OriginalStyle { get; set; }
            public Point OriginalPosition { get; set; }
            public Size OriginalSize { get; set; }
            public ResizeMode OriginalResizeMode { get; set; }


            public IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam,
                                    IntPtr lParam, ref bool handled)
            {
                if (msg == CallbackId)
                {
                    if (wParam.ToInt32() == (int)ABNotify.ABN_POSCHANGED)
                    {
                        PreviousEdge = Edge;
                        ABSetPos(Edge, PreviousEdge, Window);
                        handled = true;
                    }
                }
                return IntPtr.Zero;
            }

        }
        private static Dictionary<Window, RegisterInfo> s_RegisteredWindowInfo
            = new Dictionary<Window, RegisterInfo>();
        private static RegisterInfo GetRegisterInfo(Window appbarWindow)
        {
            RegisterInfo reg;
            if (s_RegisteredWindowInfo.ContainsKey(appbarWindow))
            {
                reg = s_RegisteredWindowInfo[appbarWindow];
            }
            else
            {
                reg = new RegisterInfo()
                {
                    CallbackId = 0,
                    Window = appbarWindow,
                    IsRegistered = false,
                    Edge = ABEdge.None,
                    PreviousEdge = ABEdge.None,
                    OriginalStyle = appbarWindow.WindowStyle,
                    OriginalPosition = new Point(appbarWindow.Left, appbarWindow.Top),
                    OriginalSize =
                        new Size(appbarWindow.ActualWidth, appbarWindow.ActualHeight),
                    OriginalResizeMode = appbarWindow.ResizeMode,
                };
                s_RegisteredWindowInfo.Add(appbarWindow, reg);
            }
            return reg;
        }

        private static void RestoreWindow(Window appbarWindow)
        {
            RegisterInfo info = GetRegisterInfo(appbarWindow);

            appbarWindow.WindowStyle = info.OriginalStyle;
            appbarWindow.ResizeMode = info.OriginalResizeMode;
            appbarWindow.Topmost = false;

            Rect rect = new Rect(info.OriginalPosition.X, info.OriginalPosition.Y,
                info.OriginalSize.Width, info.OriginalSize.Height);
            appbarWindow.Dispatcher.BeginInvoke(DispatcherPriority.ApplicationIdle,
                    new ResizeDelegate(DoResize), appbarWindow, rect);

        }


        public static void SetAppBar(Window appbarWindow, ABEdge edge)
        {
            RegisterInfo info = GetRegisterInfo(appbarWindow);
            info.Edge = edge;

            APPBARDATA abd = new APPBARDATA();
            abd.cbSize = Marshal.SizeOf(abd);
            abd.hWnd = new WindowInteropHelper(appbarWindow).Handle;

            if (edge == ABEdge.None)
            {
                if (info.IsRegistered)
                {
                    SHAppBarMessage((int)ABMsg.ABM_REMOVE, ref abd);
                    info.IsRegistered = false;
                }
                RestoreWindow(appbarWindow);
                info.PreviousEdge = info.Edge;
                return;
            }

            if (!info.IsRegistered)
            {
                info.IsRegistered = true;
                info.CallbackId = RegisterWindowMessage("AppBarMessage");
                abd.uCallbackMessage = info.CallbackId;

                uint ret = SHAppBarMessage((int)ABMsg.ABM_NEW, ref abd);

                HwndSource source = HwndSource.FromHwnd(abd.hWnd);
                source.AddHook(new HwndSourceHook(info.WndProc));
            }

            appbarWindow.WindowStyle = WindowStyle.None;
            appbarWindow.ResizeMode = ResizeMode.NoResize;
            appbarWindow.Topmost = true;

            ABSetPos(info.Edge, info.PreviousEdge, appbarWindow);
        }

        private delegate void ResizeDelegate(Window appbarWindow, Rect rect);
        private static void DoResize(Window appbarWindow, Rect rect)
        {
            appbarWindow.Width = rect.Width;
            appbarWindow.Height = rect.Height;
            appbarWindow.Top = rect.Top;
            appbarWindow.Left = rect.Left;
        }

        static TaskBar tb = new TaskBar();

        private static void ABSetPos(ABEdge edge, ABEdge prevEdge, Window appbarWindow)
        {
            APPBARDATA barData = new APPBARDATA();
            barData.cbSize = Marshal.SizeOf(barData);
            barData.hWnd = new WindowInteropHelper(appbarWindow).Handle;
            barData.uEdge = (int)edge;
            RECT wa = new RECT(SystemParameters.WorkArea);
            tb.Refresh();
            switch (edge)
            {
                case ABEdge.Top:
                    barData.rc.Left = wa.Left - (prevEdge == ABEdge.Left ? (int)Math.Round(appbarWindow.ActualWidth) : 0);
                    barData.rc.Right = wa.Right + (prevEdge == ABEdge.Right ? (int)Math.Round(appbarWindow.ActualWidth) : 0);
                    barData.rc.Top = wa.Top - (prevEdge == ABEdge.Top ? (int)Math.Round(appbarWindow.ActualHeight) : 0) - ((tb.Position != TaskBarPosition.Top && tb.PreviousPosition == TaskBarPosition.Top) ? tb.Height : 0) + ((tb.Position == TaskBarPosition.Top && tb.PreviousPosition != TaskBarPosition.Top) ? tb.Height : 0);
                    barData.rc.Bottom = barData.rc.Top + (int)Math.Round(appbarWindow.ActualHeight);
                    break;
                case ABEdge.Bottom:
                    barData.rc.Left = wa.Left - (prevEdge == ABEdge.Left ? (int)Math.Round(appbarWindow.ActualWidth) : 0);
                    barData.rc.Right = wa.Right + (prevEdge == ABEdge.Right ? (int)Math.Round(appbarWindow.ActualWidth) : 0);
                    barData.rc.Bottom = wa.Bottom + (prevEdge == ABEdge.Bottom ? (int)Math.Round(appbarWindow.ActualHeight) : 0) - 1 + ((tb.Position != TaskBarPosition.Bottom && tb.PreviousPosition == TaskBarPosition.Bottom) ? tb.Height : 0) - ((tb.Position == TaskBarPosition.Bottom && tb.PreviousPosition != TaskBarPosition.Bottom) ? tb.Height : 0);
                    barData.rc.Top = barData.rc.Bottom - (int)Math.Round(appbarWindow.ActualHeight);
                    break;
            }

            SHAppBarMessage((int)ABMsg.ABM_QUERYPOS, ref barData);
            switch (barData.uEdge)
            {
                case (int)ABEdge.Bottom:
                    if (tb.Position == TaskBarPosition.Bottom && tb.PreviousPosition == tb.Position)
                    {
                        barData.rc.Top += (tb.PreviousHeight - tb.Height);
                        barData.rc.Bottom = barData.rc.Top + (int)appbarWindow.ActualHeight;
                    }
                    break;
                case (int)ABEdge.Top:
                    if (tb.Position == TaskBarPosition.Top && tb.PreviousPosition == tb.Position)
                    {
                        if (tb.PreviousHeight - tb.Height > 0) barData.rc.Top -= (tb.PreviousHeight - tb.Height);
                        barData.rc.Bottom = barData.rc.Top + (int)appbarWindow.ActualHeight;
                    }
                    break;
            }
            SHAppBarMessage((int)ABMsg.ABM_SETPOS, ref barData);

            Rect rect = new Rect((double)barData.rc.Left, (double)barData.rc.Top, (double)(barData.rc.Right - barData.rc.Left), (double)(barData.rc.Bottom - barData.rc.Top));
            appbarWindow.Dispatcher.BeginInvoke(new ResizeDelegate(DoResize), DispatcherPriority.ApplicationIdle, appbarWindow, rect);
        }
    }
}

您可以为左右边缘编写相同的代码。 好的，Philip Rieck，谢谢！

Answer 4

从1996年开始，有一篇优秀的MSDN文章是最新的： 用应用程序桌面工具栏扩展Windows 95 Shell 。 根据其指导生成基于WPF的appbar，该appbar处理许多场景，而本页面上的其他答案不会：

• 允许停靠在屏幕的任何一侧
• 允许停靠到特定的监视器
• 允许调整appbar的大小（如果需要）
• 处理屏幕布局更改并监视断开连接
• 处理Win + Shift + Left并尝试最小化或移动窗口
• 处理与其他appbars的合作（OneNote等）
• 处理每个监视器的DPI缩放

我有一个演示应用程序和GitHub上的AppBarWindow实现 。

使用示例：

<apb:AppBarWindow x:Class="WpfAppBarDemo.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:apb="clr-namespace:WpfAppBar;assembly=WpfAppBar"
    DataContext="{Binding RelativeSource={RelativeSource Self}}" Title="MainWindow" 
    DockedWidthOrHeight="200" MinHeight="100" MinWidth="100">
    <Grid>
        <Button x:Name="btClose" Content="Close" HorizontalAlignment="Left" VerticalAlignment="Top" Width="75" Height="23" Margin="10,10,0,0" Click="btClose_Click"/>
        <ComboBox x:Name="cbMonitor" SelectedItem="{Binding Path=Monitor, Mode=TwoWay}" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Margin="10,38,0,0"/>
        <ComboBox x:Name="cbEdge" SelectedItem="{Binding Path=DockMode, Mode=TwoWay}" HorizontalAlignment="Left" Margin="10,65,0,0" VerticalAlignment="Top" Width="120"/>

        <Thumb Width="5" HorizontalAlignment="Right" Background="Gray" x:Name="rzThumb" Cursor="SizeWE" DragCompleted="rzThumb_DragCompleted" />
    </Grid>
</apb:AppBarWindow>

代码隐藏：

public partial class MainWindow
{
    public MainWindow()
    {
        InitializeComponent();

        this.cbEdge.ItemsSource = new[]
        {
            AppBarDockMode.Left,
            AppBarDockMode.Right,
            AppBarDockMode.Top,
            AppBarDockMode.Bottom
        };
        this.cbMonitor.ItemsSource = MonitorInfo.GetAllMonitors();
    }

    private void btClose_Click(object sender, RoutedEventArgs e)
    {
        Close();
    }

    private void rzThumb_DragCompleted(object sender, DragCompletedEventArgs e)
    {
        this.DockedWidthOrHeight += (int)(e.HorizontalChange / VisualTreeHelper.GetDpi(this).PixelsPerDip);
    }
}

更改停靠位置：

用拇指调整大小：

与其他appbars合作：

如果你想使用它，请从GitHub克隆。 库本身只有三个文件，可以很容易地在项目中删除。

Answer 5

很高兴找到这个问题。 上面的类非常有用，但并不完全覆盖AppBar实现的所有基础。

要完全实现AppBar的所有行为（应对全屏应用程序等），您还需要阅读此MSDN文章。

http://msdn.microsoft.com/en-us/library/bb776821.aspx

Answer 6

作为商业替代方案，请参阅WPF的即用型ShellAppBar组件，该组件支持所有案例和任务栏，例如任务栏停靠在左侧，右侧，顶部，底部边缘，支持多个显示器，拖动对接，自动隐藏等。它可以节省你的时间和金钱，而不是试图自己处理所有这些情况。

免责声明 ：我为ShellAppBar的开发商LogicNP Software工作。

Answer 7

我花了几周时间探索这个挑战，最后创建了一个非常可靠的NuGet包，以非常友好的方式提供这个功能。 只需创建一个新的WPF应用程序，然后将主窗口的类从Window更改为DockWindow（在XAML中），就是这样！

获取此处的包，并查看演示应用程序的Git repo。

Answer 8

对不起，我发布的最后一个代码在调整任务栏大小时不起作用。 以下代码更改似乎更好：

  SHAppBarMessage((int)ABMsg.ABM_QUERYPOS, ref barData); if (barData.uEdge == (int)ABEdge.Top) barData.rc.bottom = barData.rc.top + (int)Math.Round(appbarWindow.ActualHeight); else if (barData.uEdge == (int)ABEdge.Bottom) barData.rc.top = barData.rc.bottom - (int)Math.Round(appbarWindow.ActualHeight); SHAppBarMessage((int)ABMsg.ABM_SETPOS, ref barData);