c#: 任务栏进度显示(TaskbarManager)

Win7及以上系统支持任务栏进度条，为有进度类应用显示进度于任务栏，甚为方便。

以c#之WinForm实现其，大多采用Windows API Code Pack这个方案，加多引用，比较繁琐，而我总也打不开了其页面。

鄙人不喜欢多引用东西，即寻求方法抽取其相关代码，简化其应用。费些工夫，实现效果。

 

一、TaskbarManager

此为抽取必要代码而组成同名类，全部代码如下：

//抽取TaskBar代码，用其设置任务栏进度部分
//Copyright (c) Microsoft Corporation.  All rights reserved.using System;
using System.Diagnostics;
using System.Runtime.InteropServices;namespace wApp
{/// <summary>/// Represents an instance of the Windows taskbar/// </summary>public class TaskbarManager{// Hide the default constructorprivate TaskbarManager(){}// Best practice recommends defining a private object to lock onprivate static object _syncLock = new object();private static TaskbarManager _instance;/// <summary>/// Represents an instance of the Windows Taskbar/// </summary>public static TaskbarManager Instance{get{if (_instance == null){lock (_syncLock){if (_instance == null)_instance = new TaskbarManager();}}return _instance;}}/// <summary>/// Indicates whether this feature is supported on the current platform./// </summary>public static bool IsPlatformSupported{get { return Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version.CompareTo(new Version(6, 1)) >= 0; }}/// <summary>/// Displays or updates a progress bar hosted in a taskbar button of the main application window /// to show the specific percentage completed of the full operation./// </summary>/// <param name="currentValue">An application-defined value that indicates the proportion of the operation that has been completed at the time the method is called.</param>/// <param name="maximumValue">An application-defined value that specifies the value currentValue will have when the operation is complete.</param>public void SetProgressValue(int currentValue, int maximumValue){if (IsPlatformSupported)TaskbarList.Instance.SetProgressValue(OwnerHandle,Convert.ToUInt32(currentValue),Convert.ToUInt32(maximumValue));}/// <summary>/// Displays or updates a progress bar hosted in a taskbar button of the given window handle /// to show the specific percentage completed of the full operation./// </summary>/// <param name="windowHandle">The handle of the window whose associated taskbar button is being used as a progress indicator./// This window belong to a calling process associated with the button's application and must be already loaded.</param>/// <param name="currentValue">An application-defined value that indicates the proportion of the operation that has been completed at the time the method is called.</param>/// <param name="maximumValue">An application-defined value that specifies the value currentValue will have when the operation is complete.</param>public void SetProgressValue(int currentValue, int maximumValue, IntPtr windowHandle){if (IsPlatformSupported)TaskbarList.Instance.SetProgressValue(windowHandle,Convert.ToUInt32(currentValue),Convert.ToUInt32(maximumValue));}/// <summary>/// Sets the type and state of the progress indicator displayed on a taskbar button of the main application window./// </summary>/// <param name="state">Progress state of the progress button</param>public void SetProgressState(TaskbarProgressBarState state){if (IsPlatformSupported)TaskbarList.Instance.SetProgressState(OwnerHandle, (TaskbarProgressBarStatus)state);}/// <summary>/// Sets the type and state of the progress indicator displayed on a taskbar button /// of the given window handle /// </summary>/// <param name="windowHandle">The handle of the window whose associated taskbar button is being used as a progress indicator./// This window belong to a calling process associated with the button's application and must be already loaded.</param>/// <param name="state">Progress state of the progress button</param>public void SetProgressState(TaskbarProgressBarState state, IntPtr windowHandle){if (IsPlatformSupported)TaskbarList.Instance.SetProgressState(windowHandle, (TaskbarProgressBarStatus)state);}private IntPtr _ownerHandle;/// <summary>/// Sets the handle of the window whose taskbar button will be used/// to display progress./// </summary>internal IntPtr OwnerHandle{get{if (_ownerHandle == IntPtr.Zero){Process currentProcess = Process.GetCurrentProcess();if (currentProcess != null && currentProcess.MainWindowHandle != IntPtr.Zero)_ownerHandle = currentProcess.MainWindowHandle;}return _ownerHandle;}}}/// <summary>/// Represents the thumbnail progress bar state./// </summary>public enum TaskbarProgressBarState{/// <summary>/// No progress is displayed./// </summary>NoProgress = 0,/// <summary>/// The progress is indeterminate (marquee)./// </summary>Indeterminate = 0x1,/// <summary>/// Normal progress is displayed./// </summary>Normal = 0x2,/// <summary>/// An error occurred (red)./// </summary>Error = 0x4,/// <summary>/// The operation is paused (yellow)./// </summary>Paused = 0x8}/// <summary>/// Provides internal access to the functions provided by the ITaskbarList4 interface,/// without being forced to refer to it through another singleton./// </summary>internal static class TaskbarList{private static object _syncLock = new object();private static ITaskbarList4 _taskbarList;internal static ITaskbarList4 Instance{get{if (_taskbarList == null){lock (_syncLock){if (_taskbarList == null){_taskbarList = (ITaskbarList4)new CTaskbarList();_taskbarList.HrInit();}}}return _taskbarList;}}}[GuidAttribute("56FDF344-FD6D-11d0-958A-006097C9A090")][ClassInterfaceAttribute(ClassInterfaceType.None)][ComImportAttribute()]internal class CTaskbarList { }[ComImportAttribute()][GuidAttribute("c43dc798-95d1-4bea-9030-bb99e2983a1a")][InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]internal interface ITaskbarList4{// ITaskbarList
        [PreserveSig]void HrInit();[PreserveSig]void AddTab(IntPtr hwnd);[PreserveSig]void DeleteTab(IntPtr hwnd);[PreserveSig]void ActivateTab(IntPtr hwnd);[PreserveSig]void SetActiveAlt(IntPtr hwnd);// ITaskbarList2
        [PreserveSig]void MarkFullscreenWindow(IntPtr hwnd,[MarshalAs(UnmanagedType.Bool)] bool fFullscreen);// ITaskbarList3
        [PreserveSig]void SetProgressValue(IntPtr hwnd, UInt64 ullCompleted, UInt64 ullTotal);[PreserveSig]void SetProgressState(IntPtr hwnd, TaskbarProgressBarStatus tbpFlags);[PreserveSig]void RegisterTab(IntPtr hwndTab, IntPtr hwndMDI);[PreserveSig]void UnregisterTab(IntPtr hwndTab);[PreserveSig]void SetTabOrder(IntPtr hwndTab, IntPtr hwndInsertBefore);[PreserveSig]void SetTabActive(IntPtr hwndTab, IntPtr hwndInsertBefore, uint dwReserved);[PreserveSig]HResult ThumbBarAddButtons(IntPtr hwnd,uint cButtons,[MarshalAs(UnmanagedType.LPArray)] ThumbButton[] pButtons);[PreserveSig]HResult ThumbBarUpdateButtons(IntPtr hwnd,uint cButtons,[MarshalAs(UnmanagedType.LPArray)] ThumbButton[] pButtons);[PreserveSig]void ThumbBarSetImageList(IntPtr hwnd, IntPtr himl);[PreserveSig]void SetOverlayIcon(IntPtr hwnd,IntPtr hIcon,[MarshalAs(UnmanagedType.LPWStr)] string pszDescription);[PreserveSig]void SetThumbnailTooltip(IntPtr hwnd,[MarshalAs(UnmanagedType.LPWStr)] string pszTip);[PreserveSig]void SetThumbnailClip(IntPtr hwnd,IntPtr prcClip);// ITaskbarList4void SetTabProperties(IntPtr hwndTab, SetTabPropertiesOption stpFlags);}internal enum TaskbarProgressBarStatus{NoProgress = 0,Indeterminate = 0x1,Normal = 0x2,Error = 0x4,Paused = 0x8}internal enum ThumbButtonMask{Bitmap = 0x1,Icon = 0x2,Tooltip = 0x4,THB_FLAGS = 0x8}[Flags]internal enum ThumbButtonOptions{Enabled = 0x00000000,Disabled = 0x00000001,DismissOnClick = 0x00000002,NoBackground = 0x00000004,Hidden = 0x00000008,NonInteractive = 0x00000010}internal enum SetTabPropertiesOption{None = 0x0,UseAppThumbnailAlways = 0x1,UseAppThumbnailWhenActive = 0x2,UseAppPeekAlways = 0x4,UseAppPeekWhenActive = 0x8}[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]internal struct ThumbButton{/// <summary>/// WPARAM value for a THUMBBUTTON being clicked./// </summary>internal const int Clicked = 0x1800;[MarshalAs(UnmanagedType.U4)]internal ThumbButtonMask Mask;internal uint Id;internal uint Bitmap;internal IntPtr Icon;[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]internal string Tip;[MarshalAs(UnmanagedType.U4)]internal ThumbButtonOptions Flags;}/// <summary>/// HRESULT Wrapper/// </summary>public enum HResult{/// <summary>/// S_OK/// </summary>Ok = 0x0000,/// <summary>/// S_FALSE/// </summary>False = 0x0001,/// <summary>/// E_INVALIDARG/// </summary>InvalidArguments = unchecked((int)0x80070057),/// <summary>/// E_OUTOFMEMORY/// </summary>OutOfMemory = unchecked((int)0x8007000E),/// <summary>/// E_NOINTERFACE/// </summary>NoInterface = unchecked((int)0x80004002),/// <summary>/// E_FAIL/// </summary>Fail = unchecked((int)0x80004005),/// <summary>/// E_ELEMENTNOTFOUND/// </summary>ElementNotFound = unchecked((int)0x80070490),/// <summary>/// TYPE_E_ELEMENTNOTFOUND/// </summary>TypeElementNotFound = unchecked((int)0x8002802B),/// <summary>/// NO_OBJECT/// </summary>NoObject = unchecked((int)0x800401E5),/// <summary>/// Win32 Error code: ERROR_CANCELLED/// </summary>Win32ErrorCanceled = 1223,/// <summary>/// ERROR_CANCELLED/// </summary>Canceled = unchecked((int)0x800704C7),/// <summary>/// The requested resource is in use/// </summary>ResourceInUse = unchecked((int)0x800700AA),/// <summary>/// The requested resources is read-only./// </summary>AccessDenied = unchecked((int)0x80030005)}
}

 

静态类实现方法(推荐使用这个)：

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;namespace wApp
{/// <summary>/// Represents an instance of the Windows taskbar/// </summary>public static class TaskbarManager{/// <summary>/// Sets the handle of the window whose taskbar button will be used/// to display progress./// </summary>private static IntPtr ownerHandle = IntPtr.Zero;static TaskbarManager(){var currentProcess = Process.GetCurrentProcess();if (currentProcess != null && currentProcess.MainWindowHandle != IntPtr.Zero)ownerHandle = currentProcess.MainWindowHandle;}/// <summary>/// Indicates whether this feature is supported on the current platform./// </summary>private static bool IsPlatformSupported{get { return Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version.CompareTo(new Version(6, 1)) >= 0; }}/// <summary>/// Displays or updates a progress bar hosted in a taskbar button of the main application window /// to show the specific percentage completed of the full operation./// </summary>/// <param name="currentValue">An application-defined value that indicates the proportion of the operation that has been completed at the time the method is called.</param>/// <param name="maximumValue">An application-defined value that specifies the value currentValue will have when the operation is complete.</param>public static void SetProgressValue(int currentValue, int maximumValue){if (IsPlatformSupported && ownerHandle != IntPtr.Zero)TaskbarList.Instance.SetProgressValue(ownerHandle,Convert.ToUInt32(currentValue),Convert.ToUInt32(maximumValue));}/// <summary>/// Displays or updates a progress bar hosted in a taskbar button of the given window handle /// to show the specific percentage completed of the full operation./// </summary>/// <param name="windowHandle">The handle of the window whose associated taskbar button is being used as a progress indicator./// This window belong to a calling process associated with the button's application and must be already loaded.</param>/// <param name="currentValue">An application-defined value that indicates the proportion of the operation that has been completed at the time the method is called.</param>/// <param name="maximumValue">An application-defined value that specifies the value currentValue will have when the operation is complete.</param>public static void SetProgressValue(int currentValue, int maximumValue, IntPtr windowHandle){if (IsPlatformSupported)TaskbarList.Instance.SetProgressValue(windowHandle,Convert.ToUInt32(currentValue),Convert.ToUInt32(maximumValue));}/// <summary>/// Sets the type and state of the progress indicator displayed on a taskbar button of the main application window./// </summary>/// <param name="state">Progress state of the progress button</param>public static void SetProgressState(TaskbarProgressBarState state){if (IsPlatformSupported && ownerHandle != IntPtr.Zero)TaskbarList.Instance.SetProgressState(ownerHandle, (TaskbarProgressBarStatus)state);}/// <summary>/// Sets the type and state of the progress indicator displayed on a taskbar button /// of the given window handle /// </summary>/// <param name="windowHandle">The handle of the window whose associated taskbar button is being used as a progress indicator./// This window belong to a calling process associated with the button's application and must be already loaded.</param>/// <param name="state">Progress state of the progress button</param>public static void SetProgressState(TaskbarProgressBarState state, IntPtr windowHandle){if (IsPlatformSupported)TaskbarList.Instance.SetProgressState(windowHandle, (TaskbarProgressBarStatus)state);}}/// <summary>/// Represents the thumbnail progress bar state./// </summary>public enum TaskbarProgressBarState{/// <summary>/// No progress is displayed./// </summary>NoProgress = 0,/// <summary>/// The progress is indeterminate (marquee)./// </summary>Indeterminate = 0x1,/// <summary>/// Normal progress is displayed./// </summary>Normal = 0x2,/// <summary>/// An error occurred (red)./// </summary>Error = 0x4,/// <summary>/// The operation is paused (yellow)./// </summary>Paused = 0x8}/// <summary>/// Provides internal access to the functions provided by the ITaskbarList4 interface,/// without being forced to refer to it through another singleton./// </summary>internal static class TaskbarList{private static object _syncLock = new object();private static ITaskbarList4 _taskbarList;internal static ITaskbarList4 Instance{get{if (_taskbarList == null){lock (_syncLock){if (_taskbarList == null){_taskbarList = (ITaskbarList4)new CTaskbarList();_taskbarList.HrInit();}}}return _taskbarList;}}}[GuidAttribute("56FDF344-FD6D-11d0-958A-006097C9A090")][ClassInterfaceAttribute(ClassInterfaceType.None)][ComImportAttribute()]internal class CTaskbarList { }[ComImportAttribute()][GuidAttribute("c43dc798-95d1-4bea-9030-bb99e2983a1a")][InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]internal interface ITaskbarList4{// ITaskbarList
        [PreserveSig]void HrInit();[PreserveSig]void AddTab(IntPtr hwnd);[PreserveSig]void DeleteTab(IntPtr hwnd);[PreserveSig]void ActivateTab(IntPtr hwnd);[PreserveSig]void SetActiveAlt(IntPtr hwnd);// ITaskbarList2
        [PreserveSig]void MarkFullscreenWindow(IntPtr hwnd,[MarshalAs(UnmanagedType.Bool)] bool fFullscreen);// ITaskbarList3
        [PreserveSig]void SetProgressValue(IntPtr hwnd, UInt64 ullCompleted, UInt64 ullTotal);[PreserveSig]void SetProgressState(IntPtr hwnd, TaskbarProgressBarStatus tbpFlags);[PreserveSig]void RegisterTab(IntPtr hwndTab, IntPtr hwndMDI);[PreserveSig]void UnregisterTab(IntPtr hwndTab);[PreserveSig]void SetTabOrder(IntPtr hwndTab, IntPtr hwndInsertBefore);[PreserveSig]void SetTabActive(IntPtr hwndTab, IntPtr hwndInsertBefore, uint dwReserved);[PreserveSig]HResult ThumbBarAddButtons(IntPtr hwnd,uint cButtons,[MarshalAs(UnmanagedType.LPArray)] ThumbButton[] pButtons);[PreserveSig]HResult ThumbBarUpdateButtons(IntPtr hwnd,uint cButtons,[MarshalAs(UnmanagedType.LPArray)] ThumbButton[] pButtons);[PreserveSig]void ThumbBarSetImageList(IntPtr hwnd, IntPtr himl);[PreserveSig]void SetOverlayIcon(IntPtr hwnd,IntPtr hIcon,[MarshalAs(UnmanagedType.LPWStr)] string pszDescription);[PreserveSig]void SetThumbnailTooltip(IntPtr hwnd,[MarshalAs(UnmanagedType.LPWStr)] string pszTip);[PreserveSig]void SetThumbnailClip(IntPtr hwnd,IntPtr prcClip);// ITaskbarList4void SetTabProperties(IntPtr hwndTab, SetTabPropertiesOption stpFlags);}internal enum TaskbarProgressBarStatus{NoProgress = 0,Indeterminate = 0x1,Normal = 0x2,Error = 0x4,Paused = 0x8}internal enum ThumbButtonMask{Bitmap = 0x1,Icon = 0x2,Tooltip = 0x4,THB_FLAGS = 0x8}[Flags]internal enum ThumbButtonOptions{Enabled = 0x00000000,Disabled = 0x00000001,DismissOnClick = 0x00000002,NoBackground = 0x00000004,Hidden = 0x00000008,NonInteractive = 0x00000010}internal enum SetTabPropertiesOption{None = 0x0,UseAppThumbnailAlways = 0x1,UseAppThumbnailWhenActive = 0x2,UseAppPeekAlways = 0x4,UseAppPeekWhenActive = 0x8}[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]internal struct ThumbButton{/// <summary>/// WPARAM value for a THUMBBUTTON being clicked./// </summary>internal const int Clicked = 0x1800;[MarshalAs(UnmanagedType.U4)]internal ThumbButtonMask Mask;internal uint Id;internal uint Bitmap;internal IntPtr Icon;[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]internal string Tip;[MarshalAs(UnmanagedType.U4)]internal ThumbButtonOptions Flags;}/// <summary>/// HRESULT Wrapper/// </summary>public enum HResult{/// <summary>/// S_OK/// </summary>Ok = 0x0000,/// <summary>/// S_FALSE/// </summary>False = 0x0001,/// <summary>/// E_INVALIDARG/// </summary>InvalidArguments = unchecked((int)0x80070057),/// <summary>/// E_OUTOFMEMORY/// </summary>OutOfMemory = unchecked((int)0x8007000E),/// <summary>/// E_NOINTERFACE/// </summary>NoInterface = unchecked((int)0x80004002),/// <summary>/// E_FAIL/// </summary>Fail = unchecked((int)0x80004005),/// <summary>/// E_ELEMENTNOTFOUND/// </summary>ElementNotFound = unchecked((int)0x80070490),/// <summary>/// TYPE_E_ELEMENTNOTFOUND/// </summary>TypeElementNotFound = unchecked((int)0x8002802B),/// <summary>/// NO_OBJECT/// </summary>NoObject = unchecked((int)0x800401E5),/// <summary>/// Win32 Error code: ERROR_CANCELLED/// </summary>Win32ErrorCanceled = 1223,/// <summary>/// ERROR_CANCELLED/// </summary>Canceled = unchecked((int)0x800704C7),/// <summary>/// The requested resource is in use/// </summary>ResourceInUse = unchecked((int)0x800700AA),/// <summary>/// The requested resources is read-only./// </summary>AccessDenied = unchecked((int)0x80030005)}
}

 

二、使用方法

它有一静态公用变量Instance，直引用即可；或以静态类直接引用，而不再加以.Instance。以引用静态类为例：

        private void trackBar_ValueChanged(object sender, EventArgs e){TaskbarManager.SetProgressValue(trackBar.Value, trackBar.Maximum);}private void btnNoProgress_Click(object sender, EventArgs e){TaskbarManager.SetProgressState(TaskbarProgressBarState.NoProgress);}private void btnIndeterminate_Click(object sender, EventArgs e){TaskbarManager.SetProgressState(TaskbarProgressBarState.Indeterminate);}private void btnNormal_Click(object sender, EventArgs e){TaskbarManager.SetProgressState(TaskbarProgressBarState.Normal);TaskbarManager.SetProgressValue(trackBar.Value, trackBar.Maximum);}private void btn_Click(object sender, EventArgs e){TaskbarManager.SetProgressState(TaskbarProgressBarState.Error);TaskbarManager.SetProgressValue(trackBar.Value, trackBar.Maximum);}private void btnPaused_Click(object sender, EventArgs e){TaskbarManager.SetProgressState(TaskbarProgressBarState.Paused);TaskbarManager.SetProgressValue(trackBar.Value, trackBar.Maximum);}

 

三、效果如下图示：

 

 

 

参考资料：

Windows 7 progress bar in taskbar in C#? - Stack Overflow

dbarros/WindowsAPICodePack: A fork of the Windows API Code Pack with additional fixes and features by yours truly.

转载于:https://www.cnblogs.com/crwy/p/10091034.html

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