我尝试实现IPersisFile和IExtractIcon接口来设置文件夹的自定义图标。这是我的实施:
[ComImport(), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("000214FA-0000-0000-C000-000000000046")]
public interface IExtractIcon
{
[PreserveSig]
uint GetIconLocation(
uint uFlags,
/*[MarshalAs(UnmanagedType.LPTStr)]*/
StringBuilder pszIconFile,
uint cchMax,
ref int piIndex,
ref uint pwFlags);
[PreserveSig]
uint Extract(
string pzsFile,
uint nIconIndex,
ref IntPtr phiconLarge,
ref IntPtr phiconSmall,
uint nIconSize);
}
/// <summary>
///
/// </summary>
enum UFlags : uint
{
GIL_ASYNC =0x0020,
GIL_DEFAULTICON =0x0040,
GIL_FORSHELL =0x0002,
GIL_FORSHORTCUT =0x0080,
GIL_OPENICON =0x0001,
GIL_CHECKSHIELD =0x0200
}
/// <summary>
///
/// </summary>
enum PWFlags : uint
{
GIL_DONTCACHE =0x0010,
GIL_NOTFILENAME =0x0008,
GIL_PERCLASS =0x0004,
GIL_PERINSTANCE =0x0002,
GIL_SIMULATEDOC =0x0001,
GIL_SHIELD =0x0200,
GIL_FORCENOSHIELD =0x0400
}
这是代码
[ClassInterface(ClassInterfaceType.None)]
[Guid("096F8A92-49E2-451B-8CB3-9BFD19C286FD"), ComVisible(true)]
public class IconHandler : IPersistFile, IExtractIcon
{
#region fileds
Guid t = new Guid("096F8A92-49E2-451B-8CB3-9BFD19C286FD");
string FileName;
/// <summary>
/// Хранит путь к иконке
/// </summary>
string IconLocation = @"C:\Users\root\Desktop\Tosafe2\Sync2.png";
/// <summary>
/// Установочный флаг
/// </summary>
string SmalIconLocation = @"C:\Users\root\Desktop\Tosafe2\Sync3.png";
bool Flag;
public IconHandler() { }
#endregion
#region registartion Methods
[ComRegisterFunction]
public static void Register(Type t)
{
try
{
NativeMethods.Register(t.GUID, "Directory", "TosafeIconExtention.IconHandler Class");
}
catch (Exception exe)
{
throw;
}
}
[ComUnregisterFunction]
public static void Unregister(Type t)
{
try
{
NativeMethods.Unregister(t.GUID, "Directory");
}
catch (Exception exe) { throw; }
}
#endregion
#region implementation methods of IPersistFile interface
public void GetClassID(out Guid pClassID)
{
throw new NotImplementedException();
}
public void GetCurFile(out string ppszFileName)
{
throw new NotImplementedException();
}
public int IsDirty()
{
throw new NotImplementedException();
}
public void Load(string pszFileName, int dwMode)
{
FileName = pszFileName;
}
public void Save(string pszFileName, bool fRemember)
{
throw new NotImplementedException();
}
public void SaveCompleted(string pszFileName)
{
throw new NotImplementedException();
}
#endregion
#region implementation methods of IExtractIcon interface
public uint GetIconLocation(
uint uFlags,
/*[MarshalAs(UnmanagedType.LPTStr)]*/
StringBuilder pszIconFile,
uint cchMax,
ref int piIndex,
ref uint pwFlags)
{
try
{
string path = @"C:\Users\root\Desktop\3";
if (FileName.Contains(path))
Flag = true;
else
Flag = false;
pwFlags = (uint)PWFlags.GIL_NOTFILENAME | (uint)PWFlags.GIL_DONTCACHE;
return NativeMethods.S_OK;
}
catch (Exception exe)
{
return NativeMethods.S_FALSE;
}
}
public uint Extract(
string pzsFile,
uint nIconIndex,
ref IntPtr phiconLarge,
ref IntPtr phiconSmall,
uint nIconSize)
{
if (Flag)
{
if (phiconLarge != IntPtr.Zero)
{
Bitmap b = (Bitmap)Image.FromFile(IconLocation);
b.MakeTransparent(b.GetPixel(0, 0));
phiconLarge = b.GetHbitmap();
}
if (phiconSmall != IntPtr.Zero)
{
Bitmap b = (Bitmap)Image.FromFile(SmalIconLocation);
b.MakeTransparent(b.GetPixel(0, 0));
phiconLarge = b.GetHbitmap();
}
return NativeMethods.S_OK;
}
else
{
return NativeMethods.S_FALSE;
}
}
#endregion
}
问题是没有调用IPersistFile :: Load方法,IExtractIcon接口的方法也是如此。请帮我解决这个问题。