クリップボードを監視する短いプログラムを C# で作成しました。特定の文字列がクリップボードに入ると、Process.Start でプログラムを開く必要があります (文字列によって異なります)。すべて正常に動作しますが、アプリケーションが 2 回開かれることがあります。なぜこれが起こっているのかわかりません。
namespace ClipboardMonitor {
public class Form1 : System.Windows.Forms.Form {
[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);
[DllImport("kernel32.dll")]
static extern IntPtr GetConsoleWindow();
[DllImport("user32.dll")]
static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);
const int SW_HIDE = 0;
const int SW_SHOW = 5;
[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SetForegroundWindow(IntPtr hWnd);
IntPtr nextClipboardViewer;
private System.ComponentModel.Container components = null;
public Form1() {
InitializeComponent();
nextClipboardViewer = (IntPtr)SetClipboardViewer((int) this.Handle);
var handle = GetConsoleWindow();
ShowWindow(handle, SW_HIDE);
}
protected override void Dispose( bool disposing ) {
ChangeClipboardChain(this.Handle, nextClipboardViewer);
if( disposing ) {
if (components != null) {
components.Dispose();
}
}
base.Dispose( disposing );
}
private void InitializeComponent() {
this.WindowState = FormWindowState.Minimized;
this.ShowInTaskbar = false;
this.Name = "Form1";
}
[STAThread]
static void Main() {
Application.Run(new Form1());
}
protected override void WndProc(ref System.Windows.Forms.Message m) {
const int WM_DRAWCLIPBOARD = 0x308;
const int WM_CHANGECBCHAIN = 0x030D;
switch(m.Msg) {
case WM_DRAWCLIPBOARD:
DisplayClipboardData();
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 DisplayClipboardData() {
Thread.Sleep(500);
try {
IDataObject iData = new DataObject();
iData = Clipboard.GetDataObject();
if (iData.GetDataPresent(DataFormats.Text)) {
string path = iData.GetData(DataFormats.Text).ToString();
string[] words = path.Split('_');
if (words[0] == "startLO") {
ProcessStartInfo info = new ProcessStartInfo(words[1]);
Process p = Process.Start(info);
}
} else {
// We doen niets.
}
}
catch(Exception e) {
MessageBox.Show(e.ToString());
}
}
}