我需要知道 Windows 任务栏是否隐藏。我相信没有 .NET 方法可以做到这一点，而且我也遇到过很多“如何隐藏和显示任务栏”示例，但我没有看到任何基于我正在寻找的东西。我不熟悉Windows API，所以很难看懂传统的Windows代码。有人可以告诉我一篇文章或类型代码告诉我任务栏的当前状态是否隐藏吗？我正在用 C# 编写代码。

谢谢。

最佳答案

winSharp93 提供了一个似乎有效的辅助类(“Find out Size (and position) of the taskbar”)。它使用 Win32 的 SHAppBarMessage function .

以下是他博客中的代码(添加了少量内容):

using System;
using System.Drawing;
using System.Runtime.InteropServices;

namespace TaskbarTest
{
    public enum TaskbarPosition
    {
        Unknown = -1,
        Left,
        Top,
        Right,
        Bottom,
    }

    public sealed class Taskbar
    {
        private const string ClassName = "Shell_TrayWnd";

        public Rectangle Bounds {
            get;
            private set;
        }
        public TaskbarPosition Position {
            get;
            private set;
        }
        public Point Location {
            get {
                return this.Bounds.Location;
            }
        }
        public Size Size {
            get {
                return this.Bounds.Size;
            }
        }
        //Always returns false under Windows 7
        public bool AlwaysOnTop {
            get;
            private set;
        }
        public bool AutoHide {
            get;
            private set;
        }

        public Taskbar() {
            IntPtr taskbarHandle = User32.FindWindow(Taskbar.ClassName, null);

            APPBARDATA data = new APPBARDATA();
            data.cbSize = (uint)Marshal.SizeOf(typeof(APPBARDATA));
            data.hWnd = taskbarHandle;
            IntPtr result = Shell32.SHAppBarMessage(ABM.GetTaskbarPos, ref data);
            if (result == IntPtr.Zero)
                throw new InvalidOperationException();

            this.Position = (TaskbarPosition)data.uEdge;
            this.Bounds = Rectangle.FromLTRB(data.rc.left, data.rc.top, data.rc.right, data.rc.bottom);

            data.cbSize = (uint)Marshal.SizeOf(typeof(APPBARDATA));
            result = Shell32.SHAppBarMessage(ABM.GetState, ref data);
            int state = result.ToInt32();
            this.AlwaysOnTop = (state & ABS.AlwaysOnTop) == ABS.AlwaysOnTop;
            this.AutoHide = (state & ABS.Autohide) == ABS.Autohide;
        }
    }

    public enum ABM : uint
    {
        New = 0x00000000,
        Remove = 0x00000001,
        QueryPos = 0x00000002,
        SetPos = 0x00000003,
        GetState = 0x00000004,
        GetTaskbarPos = 0x00000005,
        Activate = 0x00000006,
        GetAutoHideBar = 0x00000007,
        SetAutoHideBar = 0x00000008,
        WindowPosChanged = 0x00000009,
        SetState = 0x0000000A,
    }

    public enum ABE : uint
    {
        Left = 0,
        Top = 1,
        Right = 2,
        Bottom = 3
    }

    public static class ABS
    {
        public const int Autohide = 0x0000001;
        public const int AlwaysOnTop = 0x0000002;
    }

    public static class Shell32
    {
        [DllImport("shell32.dll", SetLastError = true)]
        public static extern IntPtr SHAppBarMessage(ABM dwMessage, [In] ref APPBARDATA pData);
    }

    public static class User32
    {
        [DllImport("user32.dll", SetLastError = true)]
        public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
    }

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

    [StructLayout(LayoutKind.Sequential)]
    public struct RECT
    {
        public int left;
        public int top;
        public int right;
        public int bottom;
    }
}

作者声称它可以在他的 Windows 7 机器上运行，而且似乎也可以在我的 XP Pro 机器上运行。

以下是您可能如何使用它:

    Taskbar tb = new Taskbar();
    Console.WriteLine("w:{0}, h:{1} - hide:{2}", tb.Size.Width, tb.Size.Height, tb.AutoHide);

其中:tb.Size.Width 和 tb.Size.Height 返回任务栏的宽度和高度，如果任务栏被隐藏则 tb.AutoHide 返回 true，否则返回 false。

关于c# - 如何以编程方式确定 Windows 任务栏是否隐藏？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/2032461/