如何获取任务栏的位置和大小？
如何获取任务栏的位置和大小？
提问于 2009-08-12 05:50:07
我想知道如何获取任务栏所占的矩形(底部、顶部、左侧和右侧)。我如何在C#中做到这一点呢？
回答 8
Stack Overflow用户
发布于 2011-09-07 02:05:27
private enum TaskBarLocation { TOP, BOTTOM, LEFT, RIGHT}
private TaskBarLocation GetTaskBarLocation()
{
TaskBarLocation taskBarLocation = TaskBarLocation.BOTTOM;
bool taskBarOnTopOrBottom = (Screen.PrimaryScreen.WorkingArea.Width == Screen.PrimaryScreen.Bounds.Width);
if (taskBarOnTopOrBottom)
{
if (Screen.PrimaryScreen.WorkingArea.Top > 0) taskBarLocation = TaskBarLocation.TOP;
}
else
{
if (Screen.PrimaryScreen.WorkingArea.Left > 0)
{
taskBarLocation = TaskBarLocation.LEFT;
}
else
{
taskBarLocation = TaskBarLocation.RIGHT;
}
}
return taskBarLocation;
}Stack Overflow用户
发布于 2012-03-23 00:13:58
它实际上比上面显示的要复杂得多。首先，任务栏不必在主屏幕上，它可以拖到任何屏幕上。另一方面，从理论上讲，在每个给定屏幕的每个边缘上都可以停靠一些东西。上面的代码错误地假设，找到停靠到一条边的东西会排除所有其他边。
只有当所有屏幕中只有一条边有停靠的东西时，任务栏的位置才能从bound vs workingarea确定。
下面的函数返回一个矩形数组，每个矩形表示一个停靠的任务栏，并将计数写入其byref参数。如果计数器为1，则返回数组元素0是任务栏占用的矩形。如果大于1，那么是时候猜测了吗？
Public Function FindDockedTaskBars(ByRef DockedRectCounter As Integer) As Rectangle()
Dim TmpScrn As Screen = Nothing
Dim LeftDockedWidth As Integer = 0
Dim TopDockedHeight As Integer = 0
Dim RightDockedWidth As Integer = 0
Dim BottomDockedHeight As Integer = 0
Dim DockedRects(Screen.AllScreens.Count * 4) As Rectangle
DockedRectCounter = 0
For Each TmpScrn In Screen.AllScreens
If Not TmpScrn.Bounds.Equals(TmpScrn.WorkingArea) Then
LeftDockedWidth = Math.Abs(Math.Abs(TmpScrn.Bounds.Left) - Math.Abs(TmpScrn.WorkingArea.Left))
TopDockedHeight = Math.Abs(Math.Abs(TmpScrn.Bounds.Top) - Math.Abs(TmpScrn.WorkingArea.Top))
RightDockedWidth = (TmpScrn.Bounds.Width - LeftDockedWidth) - TmpScrn.WorkingArea.Width
BottomDockedHeight = (TmpScrn.Bounds.Height - TopDockedHeight) - TmpScrn.WorkingArea.Height
If LeftDockedWidth > 0 Then
DockedRects(DockedRectCounter).X = TmpScrn.Bounds.Left
DockedRects(DockedRectCounter).Y = TmpScrn.Bounds.Top
DockedRects(DockedRectCounter).Width = LeftDockedWidth
DockedRects(DockedRectCounter).Height = TmpScrn.Bounds.Height
DockedRectCounter += 1
End If
If RightDockedWidth > 0 Then
DockedRects(DockedRectCounter).X = TmpScrn.WorkingArea.Right
DockedRects(DockedRectCounter).Y = TmpScrn.Bounds.Top
DockedRects(DockedRectCounter).Width = RightDockedWidth
DockedRects(DockedRectCounter).Height = TmpScrn.Bounds.Height
DockedRectCounter += 1
End If
If TopDockedHeight > 0 Then
DockedRects(DockedRectCounter).X = TmpScrn.WorkingArea.Left
DockedRects(DockedRectCounter).Y = TmpScrn.Bounds.Top
DockedRects(DockedRectCounter).Width = TmpScrn.WorkingArea.Width
DockedRects(DockedRectCounter).Height = TopDockedHeight
DockedRectCounter += 1
End If
If BottomDockedHeight > 0 Then
DockedRects(DockedRectCounter).X = TmpScrn.WorkingArea.Left
DockedRects(DockedRectCounter).Y = TmpScrn.WorkingArea.Bottom
DockedRects(DockedRectCounter).Width = TmpScrn.WorkingArea.Width
DockedRects(DockedRectCounter).Height = BottomDockedHeight
DockedRectCounter += 1
End If
End If
Next
Return DockedRects
End Function或者对于那些更喜欢C#的人来说...(注意:此移植的代码未经过测试)
using System.Drawing;
using System.Windows.Forms;
public Rectangle[] FindDockedTaskBars(ref int DockedRectCounter)
{
int LeftDockedWidth = 0;
int TopDockedHeight = 0;
int RightDockedWidth = 0;
int BottomDockedHeight = 0;
Rectangle[] DockedRects = new Rectangle[Screen.AllScreens.Count() * 4];
DockedRectCounter = 0;
foreach (Screen TmpScrn in Screen.AllScreens)
{
if (!TmpScrn.Bounds.Equals(TmpScrn.WorkingArea))
{
LeftDockedWidth = Math.Abs(Math.Abs(TmpScrn.Bounds.Left) - Math.Abs(TmpScrn.WorkingArea.Left));
TopDockedHeight = Math.Abs(Math.Abs(TmpScrn.Bounds.Top) - Math.Abs(TmpScrn.WorkingArea.Top));
RightDockedWidth = (TmpScrn.Bounds.Width - LeftDockedWidth) - TmpScrn.WorkingArea.Width;
BottomDockedHeight = (TmpScrn.Bounds.Height - TopDockedHeight) - TmpScrn.WorkingArea.Height;
if (LeftDockedWidth > 0)
{
DockedRects[DockedRectCounter].X = TmpScrn.Bounds.Left;
DockedRects[DockedRectCounter].Y = TmpScrn.Bounds.Top;
DockedRects[DockedRectCounter].Width = LeftDockedWidth;
DockedRects[DockedRectCounter].Height = TmpScrn.Bounds.Height;
DockedRectCounter += 1;
}
if (RightDockedWidth > 0)
{
DockedRects[DockedRectCounter].X = TmpScrn.WorkingArea.Right;
DockedRects[DockedRectCounter].Y = TmpScrn.Bounds.Top;
DockedRects[DockedRectCounter].Width = RightDockedWidth;
DockedRects[DockedRectCounter].Height = TmpScrn.Bounds.Height;
DockedRectCounter += 1;
}
if (TopDockedHeight > 0)
{
DockedRects[DockedRectCounter].X = TmpScrn.WorkingArea.Left;
DockedRects[DockedRectCounter].Y = TmpScrn.Bounds.Top;
DockedRects[DockedRectCounter].Width = TmpScrn.WorkingArea.Width;
DockedRects[DockedRectCounter].Height = TopDockedHeight;
DockedRectCounter += 1;
}
if (BottomDockedHeight > 0)
{
DockedRects[DockedRectCounter].X = TmpScrn.WorkingArea.Left;
DockedRects[DockedRectCounter].Y = TmpScrn.WorkingArea.Bottom;
DockedRects[DockedRectCounter].Width = TmpScrn.WorkingArea.Width;
DockedRects[DockedRectCounter].Height = BottomDockedHeight;
DockedRectCounter += 1;
}
}
}
return DockedRects;
}Stack Overflow用户
发布于 2017-05-16 17:54:37
基于David's answer，这里有一个更好的实现，它使用P/Invoke来正确确定任务栏的位置和大小。到目前为止，我所知道的唯一限制是，当多个监视器被设置为以扩展模式显示时，它不会返回正确的边界。
包含所有后续更新的代码可在https://git.io/v9bCx上作为要点获得。
/******************************************************************************
* Name: Taskbar.cs
* Description: Class to get the taskbar's position, size and other properties.
* Author: Franz Alex Gaisie-Essilfie
* based on code from https://winsharp93.wordpress.com/2009/06/29/find-out-size-and-position-of-the-taskbar/
*
* Change Log:
* Date | Description
* -------------|--------------------------------------------------------------
* 2017-05-16 | Initial design
*/
using System;
using System.Drawing;
using System.Runtime.InteropServices;
namespace System.Windows.Forms
{
public enum TaskbarPosition
{
Unknown = -1,
Left,
Top,
Right,
Bottom,
}
public static class Taskbar
{
private enum ABS
{
AutoHide = 0x01,
AlwaysOnTop = 0x02,
}
////private enum ABE : uint
private enum AppBarEdge : uint
{
Left = 0,
Top = 1,
Right = 2,
Bottom = 3
}
////private enum ABM : uint
private enum AppBarMessage : uint
{
New = 0x00000000,
Remove = 0x00000001,
QueryPos = 0x00000002,
SetPos = 0x00000003,
GetState = 0x00000004,
GetTaskbarPos = 0x00000005,
Activate = 0x00000006,
GetAutoHideBar = 0x00000007,
SetAutoHideBar = 0x00000008,
WindowPosChanged = 0x00000009,
SetState = 0x0000000A,
}
private const string ClassName = "Shell_TrayWnd";
private static APPBARDATA _appBarData;
/// <summary>Static initializer of the <see cref="Taskbar" /> class.</summary>
static Taskbar()
{
_appBarData = new APPBARDATA
{
cbSize = (uint)Marshal.SizeOf(typeof(APPBARDATA)),
hWnd = FindWindow(Taskbar.ClassName, null)
};
}
/// <summary>
/// Gets a value indicating whether the taskbar is always on top of other windows.
/// </summary>
/// <value><c>true</c> if the taskbar is always on top of other windows; otherwise, <c>false</c>.</value>
/// <remarks>This property always returns <c>false</c> on Windows 7 and newer.</remarks>
public static bool AlwaysOnTop
{
get
{
int state = SHAppBarMessage(AppBarMessage.GetState, ref _appBarData).ToInt32();
return ((ABS)state).HasFlag(ABS.AlwaysOnTop);
}
}
/// <summary>
/// Gets a value indicating whether the taskbar is automatically hidden when inactive.
/// </summary>
/// <value><c>true</c> if the taskbar is set to auto-hide is enabled; otherwise, <c>false</c>.</value>
public static bool AutoHide
{
get
{
int state = SHAppBarMessage(AppBarMessage.GetState, ref _appBarData).ToInt32();
return ((ABS)state).HasFlag(ABS.AutoHide);
}
}
/// <summary>Gets the current display bounds of the taskbar.</summary>
public static Rectangle CurrentBounds
{
get
{
var rect = new RECT();
if (GetWindowRect(Handle, ref rect))
return Rectangle.FromLTRB(rect.Left, rect.Top, rect.Right, rect.Bottom);
return Rectangle.Empty;
}
}
/// <summary>Gets the display bounds when the taskbar is fully visible.</summary>
public static Rectangle DisplayBounds
{
get
{
if (RefreshBoundsAndPosition())
return Rectangle.FromLTRB(_appBarData.rect.Left,
_appBarData.rect.Top,
_appBarData.rect.Right,
_appBarData.rect.Bottom);
return CurrentBounds;
}
}
/// <summary>Gets the taskbar's window handle.</summary>
public static IntPtr Handle
{
get { return _appBarData.hWnd; }
}
/// <summary>Gets the taskbar's position on the screen.</summary>
public static TaskbarPosition Position
{
get
{
if (RefreshBoundsAndPosition())
return (TaskbarPosition)_appBarData.uEdge;
return TaskbarPosition.Unknown;
}
}
/// <summary>Hides the taskbar.</summary>
public static void Hide()
{
const int SW_HIDE = 0;
ShowWindow(Handle, SW_HIDE);
}
/// <summary>Shows the taskbar.</summary>
public static void Show()
{
const int SW_SHOW = 1;
ShowWindow(Handle, SW_SHOW);
}
private static bool RefreshBoundsAndPosition()
{
//! SHAppBarMessage returns IntPtr.Zero **if it fails**
return SHAppBarMessage(AppBarMessage.GetTaskbarPos, ref _appBarData) != IntPtr.Zero;
}
#region DllImports
[DllImport("user32.dll", SetLastError = true)]
private static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
private static extern bool GetWindowRect(IntPtr hWnd, ref RECT lpRect);
[DllImport("shell32.dll", SetLastError = true)]
private static extern IntPtr SHAppBarMessage(AppBarMessage dwMessage, [In] ref APPBARDATA pData);
[DllImport("user32.dll")]
private static extern int ShowWindow(IntPtr hwnd, int command);
#endregion DllImports
[StructLayout(LayoutKind.Sequential)]
private struct APPBARDATA
{
public uint cbSize;
public IntPtr hWnd;
public uint uCallbackMessage;
public AppBarEdge uEdge;
public RECT rect;
public int lParam;
}
[StructLayout(LayoutKind.Sequential)]
private struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1264406
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