剪贴板事件C＃

Answers:

73

我认为您必须使用一些p / invoke：

[DllImport("User32.dll", CharSet=CharSet.Auto)]
public static extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);

请参阅本文，了解如何在C＃中设置剪贴板监视器

基本上，您使用以下方式将应用程序注册为剪贴板查看器

_ClipboardViewerNext = SetClipboardViewer(this.Handle);

然后您将收到该WM_DRAWCLIPBOARD消息，您可以通过覆盖WndProc以下内容进行处理：

protected override void WndProc(ref Message m)
{
    switch ((Win32.Msgs)m.Msg)
    {
        case Win32.Msgs.WM_DRAWCLIPBOARD:
        // Handle clipboard changed
        break;
        // ... 
   }
}

（还有很多事情要做；沿着剪贴板链传递东西并取消注册视图，但是您可以从本文中获得）

— 丹尼尔·勒化学
source
它仅在第一个打开的表单上起作用...说如果我有MyForm1和myForm2，那么我先打开myForm1，然后再打开MyForm2，事件ClipboardChanged仅在MyForm1中引发。我的意思是，在MDI应用程序中……
— serhio 2011年
链接已死。您知道的任何备份吗？+1。
— 帕特里克·霍夫曼2014年
1
对于懒惰的人：设置一个计时器，在1ms时滴答。然后，每次打勾时，检查您的剪贴板内容是否已更改。这些挂钩在我的计算机上引发病毒和特洛伊木马警报。
— 2014年
1
它会将每个Windows MSG传递给表单，并使其很难调试代码
同样，将SharpClipboard作为一个库可能会更有好处，因为它将相同的功能封装到一个精细的组件库中。然后，您可以访问其ClipboardChanged事件并在剪切/复制它们时检测各种数据格式。
— 威利·木村
78

为了完整起见，这是我在生产代码中使用的控件。只需从设计器中拖动鼠标，然后双击以创建事件处理程序。

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Drawing;

namespace ClipboardAssist {

// Must inherit Control, not Component, in order to have Handle
[DefaultEvent("ClipboardChanged")]
public partial class ClipboardMonitor : Control 
{
    IntPtr nextClipboardViewer;

    public ClipboardMonitor()
    {
        this.BackColor = Color.Red;
        this.Visible = false;

        nextClipboardViewer = (IntPtr)SetClipboardViewer((int)this.Handle);
    }

    /// <summary>
    /// Clipboard contents changed.
    /// </summary>
    public event EventHandler<ClipboardChangedEventArgs> ClipboardChanged;

    protected override void Dispose(bool disposing)
    {
        ChangeClipboardChain(this.Handle, nextClipboardViewer);
    }

    [DllImport("User32.dll")]
    protected static extern int SetClipboardViewer(int hWndNewViewer);

    [DllImport("User32.dll", CharSet = CharSet.Auto)]
    public static extern bool ChangeClipboardChain(IntPtr hWndRemove, IntPtr hWndNewNext);

    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    public static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

    protected override void WndProc(ref System.Windows.Forms.Message m)
    {
        // defined in winuser.h
        const int WM_DRAWCLIPBOARD = 0x308;
        const int WM_CHANGECBCHAIN = 0x030D;

        switch (m.Msg)
        {
            case WM_DRAWCLIPBOARD:
                OnClipboardChanged();
                SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
                break;

            case WM_CHANGECBCHAIN:
                if (m.WParam == nextClipboardViewer)
                    nextClipboardViewer = m.LParam;
                else
                    SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
                break;

            default:
                base.WndProc(ref m);
                break;
        }
    }

    void OnClipboardChanged()
    {
        try
        {
            IDataObject iData = Clipboard.GetDataObject();
            if (ClipboardChanged != null)
            {
                ClipboardChanged(this, new ClipboardChangedEventArgs(iData));
            }

        }
        catch (Exception e)
        {
            // Swallow or pop-up, not sure
            // Trace.Write(e.ToString());
            MessageBox.Show(e.ToString());
        }
    }
}

public class ClipboardChangedEventArgs : EventArgs
{
    public readonly IDataObject DataObject;

    public ClipboardChangedEventArgs(IDataObject dataObject)
    {
        DataObject = dataObject;
    }
}
}
— dbkk
source
2
很好！但是，您的事件调用代码不是线程安全的。您应该创建本地副本，或者使用空的委托来初始化事件。您还忘记了ClipboardChanged的定义中的'event'关键字：)
— Ohad Schneider 2010年
1
@ohadsc感谢您的更正。据我所知，WndProc是在UI线程上调用的。由于该类是从Control派生的，因此客户端也应该在UI线程上调用它。
— dbkk 2010年
它仅在第一个打开的表单上起作用...说如果我有MyForm1和myForm2，那么我先打开myForm1，然后再打开MyForm2，事件ClipboardChanged仅在MyForm1中引发...我的意思是，在MDI应用程序中...
— serhio 2011年
您对SetClipboardViewer的调用以某种方式设置了Win32错误代码1400：“无效的窗口句柄”。但它仍然有效。这对我来说似乎有点奇怪。
— 2013年
1
SharpClipboard作为一种库可能会更具优势，因为它将相同的功能封装到一个精细的组件库中。然后，您可以访问其ClipboardChanged事件并在剪切/复制它们时检测各种数据格式。
— 威利·木村
26

我在WPF中遇到了这个挑战，最终使用了下面描述的方法。对于Windows窗体，此答案的其他地方都有出色的示例，例如ClipboardHelper控件。

对于WPF，我们无法覆盖WndProc，因此我们必须使用HwndSource AddHook调用使用窗口中的Source显式地将其挂钩。剪贴板侦听器仍使用AddClipboardFormatListener本机互操作调用。

本机方法：

internal static class NativeMethods
{
    // See http://msdn.microsoft.com/en-us/library/ms649021%28v=vs.85%29.aspx
    public const int WM_CLIPBOARDUPDATE = 0x031D;
    public static IntPtr HWND_MESSAGE = new IntPtr(-3);

    // See http://msdn.microsoft.com/en-us/library/ms632599%28VS.85%29.aspx#message_only
    [DllImport("user32.dll", SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool AddClipboardFormatListener(IntPtr hwnd);
}

剪贴板管理器类：

using System.Windows;
using System.Windows.Interop;

public class ClipboardManager
{
    public event EventHandler ClipboardChanged;

    public ClipboardManager(Window windowSource)
    {
        HwndSource source = PresentationSource.FromVisual(windowSource) as HwndSource;
        if(source == null)
        {
            throw new ArgumentException(
                "Window source MUST be initialized first, such as in the Window's OnSourceInitialized handler."
                , nameof(windowSource));
        }

        source.AddHook(WndProc);

        // get window handle for interop
        IntPtr windowHandle = new WindowInteropHelper(windowSource).Handle;

        // register for clipboard events
        NativeMethods.AddClipboardFormatListener(windowHandle);
    }

    private void OnClipboardChanged()
    {
        ClipboardChanged?.Invoke(this, EventArgs.Empty);
    }

    private static readonly IntPtr WndProcSuccess = IntPtr.Zero;

    private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
    {
        if (msg == NativeMethods.WM_CLIPBOARDUPDATE)
        {
            OnClipboardChanged();
            handled = true;
        }

        return WndProcSuccess;
    }
}

通过在OnSourceInitialized或更高版本中添加事件（例如Window.Loaded事件）或在操作过程中，可以在WPF窗口中使用此方法。（当我们有足够的信息来使用本机挂钩时）：

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
    }

    protected override void OnSourceInitialized(EventArgs e)
    {
        base.OnSourceInitialized(e);

        // Initialize the clipboard now that we have a window soruce to use
        var windowClipboardManager = new ClipboardManager(this);
        windowClipboardManager.ClipboardChanged += ClipboardChanged;
    }

    private void ClipboardChanged(object sender, EventArgs e)
    {
        // Handle your clipboard update here, debug logging example:
        if (Clipboard.ContainsText())
        {
            Debug.WriteLine(Clipboard.GetText());
        }
    }
}

我在流亡路径项目分析器项目中使用了这种方法，因为当您按Ctrl-C时，游戏会通过剪贴板显示项目信息。

https://github.com/ColinDabritz/PoeItemAnalyzer

我希望这可以帮助使用WPF剪贴板的人进行更改处理！

— 科林·达布里兹
source
1
如果有人不知道在C＃6中ClipboardChanged?.Invoke看到“ 使用新的空条件运算符”意味着什么，请参阅“ 其他方案”
— marbel82，2016年
11

好的，这是一篇过时的文章，但是我们找到了一个与当前答案相比非常简单的解决方案。我们正在使用WPF，并且如果剪贴板包含文本，我们希望启用和禁用自己的自定义命令（在ContextMenu中）。已经存在一个ApplicationCommands.Cut，Cut，Copy和Paste，并且这些命令可以正确响应剪贴板的更改。因此，我们仅添加了以下EventHandler。

ApplicationCommands.Paste.CanExecuteChanged += new EventHandler(Paste_CanExecuteChanged);

private void Paste_CanExecuteChanged(object sender, EventArgs e) {
  ourVariable= Clipboard.ContainsText();
}

实际上，我们是通过这种方式在自己的命令上控制CanExecute的。根据我们的需要工作，也许会帮助其他人。

— 埃里克
source
很好的解决方案，因为它是如此简单...谢谢！
— 好的
1
对于启用或禁用粘贴命令的特定问题，这是一个绝佳的解决方案。不幸的是，它没有涵盖特定的“文本已更改”方案，并且例如在复制多个不同行的文本时不会触发。
— Colin Dabritz
11

有多种方法可以执行此操作，但这是我的最爱并且对我有效。我创建了一个类库，以便其他人可以添加项目并包含DLL，然后简单地对其进行调用，并在他们希望在其应用程序中的任何地方使用它。

这个答案的帮助下做这一个。

  1. 创建类库项目，并将其命名为ClipboardHelper。
  2. 用ClipboardMonitor替换Class1名称。
  3. 将以下代码添加到其中。
  4. 添加System.Windows.Forms参考。

代码下的更多步骤。

using System;
using System.Windows.Forms;
using System.Threading;
using System.Runtime.InteropServices;

namespace ClipboardHelper
{
    public static class ClipboardMonitor
    {
        public delegate void OnClipboardChangeEventHandler(ClipboardFormat format, object data);
        public static event OnClipboardChangeEventHandler OnClipboardChange;

        public static void Start()
        {
            ClipboardWatcher.Start();
            ClipboardWatcher.OnClipboardChange += (ClipboardFormat format, object data) =>
            {
                if (OnClipboardChange != null)
                    OnClipboardChange(format, data);
            };
        }

        public static void Stop()
        {
            OnClipboardChange = null;
            ClipboardWatcher.Stop();
        }

        class ClipboardWatcher : Form
        {
            // static instance of this form
            private static ClipboardWatcher mInstance;

            // needed to dispose this form
            static IntPtr nextClipboardViewer;

            public delegate void OnClipboardChangeEventHandler(ClipboardFormat format, object data);
            public static event OnClipboardChangeEventHandler OnClipboardChange;

            // start listening
            public static void Start()
            {
                // we can only have one instance if this class
                if (mInstance != null)
                    return;

                var t = new Thread(new ParameterizedThreadStart(x => Application.Run(new ClipboardWatcher())));
                t.SetApartmentState(ApartmentState.STA); // give the [STAThread] attribute
                t.Start();
            }

            // stop listening (dispose form)
            public static void Stop()
            {
                mInstance.Invoke(new MethodInvoker(() =>
                {
                    ChangeClipboardChain(mInstance.Handle, nextClipboardViewer);
                }));
                mInstance.Invoke(new MethodInvoker(mInstance.Close));

                mInstance.Dispose();

                mInstance = null;
            }

            // on load: (hide this window)
            protected override void SetVisibleCore(bool value)
            {
                CreateHandle();

                mInstance = this;

                nextClipboardViewer = SetClipboardViewer(mInstance.Handle);

                base.SetVisibleCore(false);
            }

            [DllImport("User32.dll", CharSet = CharSet.Auto)]
            private static extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);

            [DllImport("User32.dll", CharSet = CharSet.Auto)]
            private static extern bool ChangeClipboardChain(IntPtr hWndRemove, IntPtr hWndNewNext);

            [DllImport("user32.dll", CharSet = CharSet.Auto)]
            private static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

            // defined in winuser.h
            const int WM_DRAWCLIPBOARD = 0x308;
            const int WM_CHANGECBCHAIN = 0x030D;

            protected override void WndProc(ref Message m)
            {
                switch (m.Msg)
                {
                    case WM_DRAWCLIPBOARD:
                        ClipChanged();
                        SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
                        break;

                    case WM_CHANGECBCHAIN:
                        if (m.WParam == nextClipboardViewer)
                            nextClipboardViewer = m.LParam;
                        else
                            SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
                        break;

                    default:
                        base.WndProc(ref m);
                        break;
                }
            }

            static readonly string[] formats = Enum.GetNames(typeof(ClipboardFormat));

            private void ClipChanged()
            {
                IDataObject iData = Clipboard.GetDataObject();

                ClipboardFormat? format = null;

                foreach (var f in formats)
                {
                    if (iData.GetDataPresent(f))
                    {
                        format = (ClipboardFormat)Enum.Parse(typeof(ClipboardFormat), f);
                        break;
                    }
                }

                object data = iData.GetData(format.ToString());

                if (data == null || format == null)
                    return;

                if (OnClipboardChange != null)
                    OnClipboardChange((ClipboardFormat)format, data);
            }
        }
    }

    public enum ClipboardFormat : byte
    {
        /// <summary>Specifies the standard ANSI text format. This static field is read-only.
        /// </summary>
        /// <filterpriority>1</filterpriority>
        Text,
        /// <summary>Specifies the standard Windows Unicode text format. This static field
        /// is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        UnicodeText,
        /// <summary>Specifies the Windows device-independent bitmap (DIB) format. This static
        /// field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Dib,
        /// <summary>Specifies a Windows bitmap format. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Bitmap,
        /// <summary>Specifies the Windows enhanced metafile format. This static field is
        /// read-only.</summary>
        /// <filterpriority>1</filterpriority>
        EnhancedMetafile,
        /// <summary>Specifies the Windows metafile format, which Windows Forms does not
        /// directly use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        MetafilePict,
        /// <summary>Specifies the Windows symbolic link format, which Windows Forms does
        /// not directly use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        SymbolicLink,
        /// <summary>Specifies the Windows Data Interchange Format (DIF), which Windows Forms
        /// does not directly use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Dif,
        /// <summary>Specifies the Tagged Image File Format (TIFF), which Windows Forms does
        /// not directly use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Tiff,
        /// <summary>Specifies the standard Windows original equipment manufacturer (OEM)
        /// text format. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        OemText,
        /// <summary>Specifies the Windows palette format. This static field is read-only.
        /// </summary>
        /// <filterpriority>1</filterpriority>
        Palette,
        /// <summary>Specifies the Windows pen data format, which consists of pen strokes
        /// for handwriting software, Windows Forms does not use this format. This static
        /// field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        PenData,
        /// <summary>Specifies the Resource Interchange File Format (RIFF) audio format,
        /// which Windows Forms does not directly use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Riff,
        /// <summary>Specifies the wave audio format, which Windows Forms does not directly
        /// use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        WaveAudio,
        /// <summary>Specifies the Windows file drop format, which Windows Forms does not
        /// directly use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        FileDrop,
        /// <summary>Specifies the Windows culture format, which Windows Forms does not directly
        /// use. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Locale,
        /// <summary>Specifies text consisting of HTML data. This static field is read-only.
        /// </summary>
        /// <filterpriority>1</filterpriority>
        Html,
        /// <summary>Specifies text consisting of Rich Text Format (RTF) data. This static
        /// field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Rtf,
        /// <summary>Specifies a comma-separated value (CSV) format, which is a common interchange
        /// format used by spreadsheets. This format is not used directly by Windows Forms.
        /// This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        CommaSeparatedValue,
        /// <summary>Specifies the Windows Forms string class format, which Windows Forms
        /// uses to store string objects. This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        StringFormat,
        /// <summary>Specifies a format that encapsulates any type of Windows Forms object.
        /// This static field is read-only.</summary>
        /// <filterpriority>1</filterpriority>
        Serializable,
    }
}
  1. 在其他项目中，右键单击解决方案，然后单击添加->退出项目-> ClipboardHelper.csproj
  2. 在项目上，转到并右键单击引用->添加引用->解决方案->选择ClipboardHelper。
  3. 在项目的类文件中，使用ClipboardHelper键入。

  4. 您现在可以键入ClipboardMonitor.Start或.Stop或.OnClipboardChanged

    using ClipboardHelper;

namespace Something.Something.DarkSide
{
    public class MainWindow
    {

        public MainWindow()
        {
            InitializeComponent();

            Loaded += MainWindow_Loaded;
        }

        void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            ClipboardMonitor.OnClipboardChange += ClipboardMonitor_OnClipboardChange;
            ClipboardMonitor.Start();
        }               

        private void ClipboardMonitor_OnClipboardChange(ClipboardFormat format, object data)
        {
            // Do Something...
        }
}
— 阿扎马齐兹
source
6

我相信较早的解决方案之一不会检查dispose方法是否为null：

using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Drawing;

namespace ClipboardAssist {

// Must inherit Control, not Component, in order to have Handle
[DefaultEvent("ClipboardChanged")]
public partial class ClipboardMonitor : Control 
{
    IntPtr nextClipboardViewer;

    public ClipboardMonitor()
    {
        this.BackColor = Color.Red;
        this.Visible = false;

        nextClipboardViewer = (IntPtr)SetClipboardViewer((int)this.Handle);
    }

    /// <summary>
    /// Clipboard contents changed.
    /// </summary>
    public event EventHandler<ClipboardChangedEventArgs> ClipboardChanged;

    protected override void Dispose(bool disposing)
    {
        if(nextClipboardViewer != null)
            ChangeClipboardChain(this.Handle, nextClipboardViewer);
    }

    [DllImport("User32.dll")]
    protected static extern int SetClipboardViewer(int hWndNewViewer);

    [DllImport("User32.dll", CharSet = CharSet.Auto)]
    public static extern bool ChangeClipboardChain(IntPtr hWndRemove, IntPtr hWndNewNext);

    [DllImport("user32.dll", CharSet = CharSet.Auto)]
    public static extern int SendMessage(IntPtr hwnd, int wMsg, IntPtr wParam, IntPtr lParam);

    protected override void WndProc(ref System.Windows.Forms.Message m)
    {
        // defined in winuser.h
        const int WM_DRAWCLIPBOARD = 0x308;
        const int WM_CHANGECBCHAIN = 0x030D;

        switch (m.Msg)
        {
            case WM_DRAWCLIPBOARD:
                OnClipboardChanged();
                SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
                break;

            case WM_CHANGECBCHAIN:
                if (m.WParam == nextClipboardViewer)
                    nextClipboardViewer = m.LParam;
                else
                    SendMessage(nextClipboardViewer, m.Msg, m.WParam, m.LParam);
                break;

            default:
                base.WndProc(ref m);
                break;
        }
    }

    void OnClipboardChanged()
    {
        try
        {
            IDataObject iData = Clipboard.GetDataObject();
            if (ClipboardChanged != null)
            {
                ClipboardChanged(this, new ClipboardChangedEventArgs(iData));
            }

        }
        catch (Exception e)
        {
            // Swallow or pop-up, not sure
            // Trace.Write(e.ToString());
            MessageBox.Show(e.ToString());
        }
    }
}

    public class ClipboardChangedEventArgs : EventArgs
    {
        public readonly IDataObject DataObject;

        public ClipboardChangedEventArgs(IDataObject dataObject)
        {
            DataObject = dataObject;
        }
    }
}
— 山姆·菲舍尔83
source
它永远不会为null，因为构造函数对其进行了设置。我唯一会做不同的事情是base.Dispose()在dispose方法中调用。
— jedmao 2012年
无论如何。为了进行校验，就像你上市，你应该使用IntPtr.Zero为NULL（注意，这不是等同于C＃空）stackoverflow.com/questions/1456861/...
— 瓦尔特
1
在所有msdn示例中，始终在退出时执行ChangeClipboardChain
— walter
目的是将自己从剪贴板查看器链中删除
— walter 2012年
5

SharpClipboard作为一种库可能会更具优势，因为它将相同的功能封装到一个精细的组件库中。然后，您可以访问其ClipboardChanged事件并在剪切/复制它们时检测各种数据格式。

您可以选择要监视的各种数据格式：

var clipboard = new SharpClipboard();

clipboard.ObservableFormats.Texts = true;
clipboard.ObservableFormats.Files = true;
clipboard.ObservableFormats.Images = true;
clipboard.ObservableFormats.Others = true;

这是使用其ClipboardChanged事件的示例：

private void ClipboardChanged(Object sender, ClipboardChangedEventArgs e)
{
    // Is the content copied of text type?
    if (e.ContentType == SharpClipboard.ContentTypes.Text)
    {
        // Get the cut/copied text.
        Debug.WriteLine(clipboard.ClipboardText);
    }

    // Is the content copied of image type?
    else if (e.ContentType == SharpClipboard.ContentTypes.Image)
    {
        // Get the cut/copied image.
        Image img = clipboard.ClipboardImage;
    }

    // Is the content copied of file type?
    else if (e.ContentType == SharpClipboard.ContentTypes.Files)
    {
        // Get the cut/copied file/files.
        Debug.WriteLine(clipboard.ClipboardFiles.ToArray());

        // ...or use 'ClipboardFile' to get a single copied file.
        Debug.WriteLine(clipboard.ClipboardFile);
    }

    // If the cut/copied content is complex, use 'Other'.
    else if (e.ContentType == SharpClipboard.ContentTypes.Other)
    {
        // Do something with 'e.Content' here...
    }
}

您还可以找出发生剪切/复制事件的应用程序及其详细信息：

private void ClipboardChanged(Object sender, SharpClipboard.ClipboardChangedEventArgs e)
{
    // Gets the application's executable name.
    Debug.WriteLine(e.SourceApplication.Name);
    // Gets the application's window title.
    Debug.WriteLine(e.SourceApplication.Title);
    // Gets the application's process ID.
    Debug.WriteLine(e.SourceApplication.ID.ToString());
    // Gets the application's executable path.
    Debug.WriteLine(e.SourceApplication.Path);
}

还有其他事件，例如 MonitorChanged每当禁用剪贴板监视时便监听事件，这意味着您可以在运行时启用或禁用监视剪贴板。

除此之外，由于它是组件，因此您可以通过将其拖放到Windows窗体中的方式在Designer视图中使用它，这使任何人都可以非常轻松地自定义其选项并处理其内置事件。

SharpClipboard似乎是.NET中剪贴板监视方案的最佳选择。

— 威利·木村（Willy Kimura）
source
0 
        [DllImport("User32.dll", CharSet = CharSet.Auto)]
        public static extern IntPtr SetClipboardViewer(IntPtr hWndNewViewer);
        private IntPtr _ClipboardViewerNext;

        private void Form1_Load(object sender, EventArgs e)
        {
            _ClipboardViewerNext = SetClipboardViewer(this.Handle);
        }

        protected override void WndProc(ref System.Windows.Forms.Message m)
        {
            const int WM_DRAWCLIPBOARD = 0x308;

            switch (m.Msg)
            {
                case WM_DRAWCLIPBOARD:
                    //Clipboard is Change 
                    //your code..............
                    break; 
                default:
                    base.WndProc(ref m);
                    break;
            }
        }
— 侯赛因·哈吉扎德
source
By using our site, you acknowledge that you have read and understand our Cookie Policy and Privacy Policy.
Licensed under cc by-sa 3.0 with attribution required.