public sealed class ShellInterop
{
private ShellInterop()
{
}
[DllImport("shell32.dll")]
public static extern void SHChangeNotify(int eventID, uint flags, IntPtr item1, IntPtr item2);
}
[ComVisible(false)]
[ComImport]
[Guid("0C6C4200-C589-11D0-999A-00C04FD655E1")]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
public interface IShellIconOverlayIdentifier
{
[PreserveSig]
int IsMemberOf([MarshalAs(UnmanagedType.LPWStr)]string path, uint attributes);
[PreserveSig]
int GetOverlayInfo(
IntPtr iconFileBuffer,
int iconFileBufferSize,
out int iconIndex,
out uint flags);
[PreserveSig]
int GetPriority(out int priority);
}
[ComVisible(true)]
[Guid("B8FA9E43-38E6-4654-8A13-FF905AD22CE5")]
public class MyIconOverlay : IShellIconOverlayIdentifier
{
#region IShellIconOverlayIdentifier Members
public int IsMemberOf(string path, uint attributes)
{
//Show everything with icon overlay
return 0; // S_OK
}
public int GetOverlayInfo(IntPtr iconFileBuffer, int
iconFileBufferSize,
out int iconIndex, out uint flags)
{
System.Diagnostics.Debug.WriteLine(string.Format("GetOverlayInfo::{0}", iconFileBuffer));
System.Diagnostics.Debug.WriteLine(string.Format("GetOverlayInfo::{0}", iconFileBufferSize));
string fname = @"c:\NormalIcon.ico";
int bytesCount = System.Text.Encoding.Unicode.GetByteCount(fname);
System.Diagnostics.Debug.WriteLine(string.Format("GetOverlayInfo::{0}", bytesCount));
byte[] bytes = System.Text.Encoding.Unicode.GetBytes(fname);
if (bytes.Length + 2 < iconFileBufferSize)
{
for (int i = 0; i < bytes.Length; i++)
{
Marshal.WriteByte(iconFileBuffer, i, bytes[i]);
}
//write the "\0\0"
Marshal.WriteByte(iconFileBuffer, bytes.Length, 0);
Marshal.WriteByte(iconFileBuffer, bytes.Length + 1, 0);
}
iconIndex = 0;
flags = 1; // ISIOI_ICONFILE
return 0; // S_OK
}
public int GetPriority(out int priority)
{
priority = 0; // 0-100 (0 is highest priority)
return 0; // S_OK
}
#endregion
#region Registry
[ComRegisterFunction]
public static void Register(Type t)
{
RegistryKey rk = Registry.LocalMachine.CreateSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers\_"
+ t.Name);
rk.SetValue(string.Empty, t.GUID.ToString("B").ToUpper());
rk.Close();
ShellInterop.SHChangeNotify(0x08000000, 0, IntPtr.Zero, IntPtr.Zero);
}
[ComUnregisterFunction]
public static void Unregister(Type t)
{
Registry.LocalMachine.DeleteSubKeyTree(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\ShellIconOverlayIdentifiers\_"
+ t.Name);
ShellInterop.SHChangeNotify(0x08000000, 0, IntPtr.Zero, IntPtr.Zero);
}
#endregion
}
如果有人能向我解释,请。我有一种情况,我必须为用户在特殊文件夹下创建的文件和文件夹实现图标叠加。
由于
答案 0 :(得分:0)
(编辑:修改regsvr32到regasm,抱歉我的错误)
此代码有三个主要部分:
1)IShellIconOverlayIdentifier
的互操作签名,shell是用来添加图标叠加的接口。
2)MyOverlay,该接口的一个实现,添加(我猜)“normalIcon.ico”作为叠加。
3)(这是重要的部分)代码,用于在注册表中注册和注销MyOverlay作为shell扩展。
我不太熟悉图标叠加的细节,但似乎要启用此功能,您需要调用Register方法。由于它标有[ComRegisterFunction]
,我猜你所要做的就是从具有管理员权限的命令提示符调用
C:\> regasm <path to your DLL>
应该叫Register。同样要卸载regasm /u <path>
。试一试。