/// <summary>
/// Constructor. Create a sub-item shell item object.
/// </summary>
/// <param name="shDesktop">IShellFolder interface of the Desktop</param>
/// <param name="pIDL">The fully qualified PIDL for this shell item</param>
/// <param name="shParent">The ShellItem object for this item's parent</param>
public ShellItem(ShellAPI.IShellFolder shDesktop, IntPtr pIDL, ShellItem shParent)
{
// We need the Desktop shell item to exist first.
if (m_bHaveRootShell == false)
throw new Exception("The root shell item must be created before creating a sub-item");
// Create the FQ PIDL for this new item.
m_pIDL = ShellAPI.ILCombine(shParent.PIDL, pIDL);
// Get the properties of this item.
ShellAPI.SFGAOF uFlags = ShellAPI.SFGAOF.SFGAO_FOLDER | ShellAPI.SFGAOF.SFGAO_HASSUBFOLDER;
// Here we get some basic attributes.
shDesktop.GetAttributesOf(1, out m_pIDL, out uFlags);
IsFolder = Convert.ToBoolean(uFlags & ShellAPI.SFGAOF.SFGAO_FOLDER);
HasSubFolder = Convert.ToBoolean(uFlags & ShellAPI.SFGAOF.SFGAO_HASSUBFOLDER);
// Now we want to get extended attributes such as the icon index etc.
ShellAPI.SHFILEINFO shInfo = new ShellAPI.SHFILEINFO();
ShellAPI.SHGFI vFlags =
ShellAPI.SHGFI.SHGFI_SMALLICON |
ShellAPI.SHGFI.SHGFI_SYSICONINDEX |
ShellAPI.SHGFI.SHGFI_PIDL |
ShellAPI.SHGFI.SHGFI_DISPLAYNAME;
ShellAPI.SHGetFileInfo(m_pIDL, 0, out shInfo, (uint)Marshal.SizeOf(shInfo), vFlags);
DisplayName = shInfo.szDisplayName;
IconIndex = shInfo.iIcon;
Path = GetPath();
// Create the IShellFolder interface for this item.
if (IsFolder)
{
uint hRes = shParent.m_shShellFolder.BindToObject(pIDL, IntPtr.Zero, ref ShellAPI.IID_IShellFolder, out m_shShellFolder);
if (hRes != 0)
Marshal.ThrowExceptionForHR((int)hRes);
}
}