AutoCAD 剪贴板格式的 .net 声明

结构体声明

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

[StructLayout(LayoutKind.Sequential, Pack=8)]
struct Point3D
{
  public double x;
  public double y;
  public double z;
};

[StructLayout(LayoutKind.Sequential, Pack=8, CharSet = CharSet.Unicode)]
struct ClipboardInfo
{
  [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
  public string szTempFile;
  [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
  public string szSourceFile;
  [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
  public string szSignature;
  public int nFlags;
  public Point3D dptInsert;
  public Rect rectGDI;
  public IntPtr mpView;
  public int dwThreadId;
  public int nLen;
  public int nType;
  [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 1)]
  public string chData;
};

  class NativeMethods
  {
    [DllImport("user32.dll")]
    public static extern bool OpenClipboard(IntPtr hWndNewOwner);
    [DllImport("user32.dll")]
    public static extern bool CloseClipboard();
    [DllImport("user32.dll")]
    public static extern IntPtr GetClipboardData(uint uFormat);
    [DllImport("user32.dll")]
    public static extern uint RegisterClipboardFormat(string lpszFormat);
    [DllImport("user32.dll")]
    public static extern IntPtr SetClipboardData(uint uFormat, IntPtr hMem);
    [DllImport("user32.dll")]
    public static extern bool EmptyClipboard();
    [DllImport("kernel32.dll")]
    public static extern IntPtr GlobalLock(IntPtr hMem);
    [DllImport("kernel32.dll")]
    public static extern bool GlobalUnlock(IntPtr hMem);
    [DllImport("kernel32.dll")]
    public static extern IntPtr GlobalAlloc(uint uFlags, int dwBytes);
    [DllImport("kernel32.dll")]
    public static extern IntPtr GlobalFree(IntPtr hMem);
  };

读取

static void showClipboard(StringBuilder sb)
{
    uint cf = NativeMethods.RegisterClipboardFormat("AutoCAD.r22");
    if (NativeMethods.OpenClipboard(IntPtr.Zero)) {
      IntPtr data = NativeMethods.GetClipboardData(cf);
      IntPtr ptr = NativeMethods.GlobalLock(data);
      ClipboardInfo ci = (ClipboardInfo)Marshal.PtrToStructure(ptr,
        typeof(ClipboardInfo));
      sb.AppendLine();
      sb.AppendLine(string.Format("szTempFile={0}", ci.szTempFile));
      sb.AppendLine(string.Format("dptInsert: {0}, {1}, {2}", ci.dptInsert.x, ci.dptInsert.y, ci.dptInsert.z));
      NativeMethods.GlobalUnlock(data);
      NativeMethods.CloseClipboard();
  }
}

设置

public static int setClipboard()
{
  uint cf = NativeMethods.RegisterClipboardFormat("AutoCAD.r22");
  int size = Marshal.SizeOf(typeof(ClipboardInfo));
  IntPtr hglobal = NativeMethods.GlobalAlloc(0x0002, size);
  if (NativeMethods.OpenClipboard(IntPtr.Zero)) {
    NativeMethods.EmptyClipboard();
    IntPtr ptr = NativeMethods.GlobalLock(hglobal);
    ClipboardInfo ci;
    ci.szTempFile = "abcd.txt";
    ci.szSourceFile = "efgh.txt";
    ci.szSignature = "R15";
    ci.nFlags = 0;
    ci.dptInsert.x=ci.dptInsert.y=ci.dptInsert.z=1.0;
    ci.rectGDI.left = 0;
    ci.rectGDI.top = 0;
    ci.rectGDI.right = 20;
    ci.rectGDI.bottom = 30;
    ci.mpView = IntPtr.Zero;
    ci.dwThreadId = 124;
    ci.nLen = 0;
    ci.nType = 0;
    ci.chData = string.Empty;
    Marshal.StructureToPtr(ci, ptr, true);
    NativeMethods.GlobalUnlock(hglobal);
    NativeMethods.SetClipboardData(cf, hglobal);
    NativeMethods.CloseClipboard();
  }
  NativeMethods.GlobalFree(hglobal);
  return 1;
}