/// <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_ICON |
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);
}
}
//Icon icon = (Icon)Icon.FromHandle(shInfo.hIcon).Clone();
//icon.ToBitmap().Save(shInfo.szDisplayName + ".png");
//User32.DestroyIcon(shInfo.hIcon);
}
/// <summary>
/// 属性を初期化する。
/// </summary>
private void InitAtr(InitMode mode, IntPtr pIDL, ShellAPI.IShellFolder parentSf)
{
// 基本的な属性を初期化する
ShellAPI.SFGAOF uFlags = 0;
switch (mode)
{
case InitMode.Desktop:
{
this.IsFolder = true;
this.IsFileSystem = false;
this.HasSubFolder = true;
}
break;
case InitMode.Path:
case InitMode.Child:
{
uFlags =
ShellAPI.SFGAOF.SFGAO_FOLDER |
ShellAPI.SFGAOF.SFGAO_FILESYSTEM |
ShellAPI.SFGAOF.SFGAO_FILESYSANCESTOR;
parentSf.GetAttributesOf(1, out pIDL, out uFlags);
this.IsFolder = Convert.ToBoolean(uFlags & ShellAPI.SFGAOF.SFGAO_FOLDER);
this.IsFileSystem = Convert.ToBoolean(uFlags & ShellAPI.SFGAOF.SFGAO_FILESYSTEM);
if (this.IsFolder)
{
// GetAttributesOf で SFGAO_HASSUBFOLDER を調べるとかなり遅くなる、
// そもそも this.HasSubFolder はヒントとして使用するだけなのでフォルダの場合は問答無用で
// this.HasSubFolder に true をセットする
this.HasSubFolder = true;
// このオブジェクト用の IShellFolder インターフェース取得
m_ShellFolder = ShellAPI.BindToIShellFolder(parentSf, pIDL);
}
}
break;
}
// パス名取得
m_Path = ShellAPI.SHGetPathFromIDList(m_pIDL);
// アイコンインデックス番号とかの属性取得
ShellAPI.SHFILEINFO shInfo = new ShellAPI.SHFILEINFO();
ShellAPI.SHGetFileInfoW(
m_pIDL,
0,
out shInfo,
(uint)Marshal.SizeOf(shInfo),
ShellAPI.SHGFI.SHGFI_SMALLICON |
ShellAPI.SHGFI.SHGFI_SYSICONINDEX |
ShellAPI.SHGFI.SHGFI_PIDL |
ShellAPI.SHGFI.SHGFI_DISPLAYNAME |
ShellAPI.SHGFI.SHGFI_TYPENAME
);
m_DisplayName = shInfo.szDisplayName;
m_TypeName = shInfo.szTypeName;
m_iIconIndex = shInfo.iIcon;
// 選択時のアイコンインデックス番号取得
ShellAPI.SHGetFileInfoW(
m_pIDL,
0,
out shInfo,
(uint)Marshal.SizeOf(shInfo),
ShellAPI.SHGFI.SHGFI_PIDL |
ShellAPI.SHGFI.SHGFI_SMALLICON |
ShellAPI.SHGFI.SHGFI_SYSICONINDEX |
ShellAPI.SHGFI.SHGFI_OPENICON
);
m_iSelectedIconIndex = shInfo.iIcon;
// いろいろ調べてアイテム種類(m_ItemType)を確定する
if (this.IsFileSystem)
{
bool bValidated = false;
m_FileName = "";
try
{
m_FileName = System.IO.Path.GetFileName(m_Path);
if (this.IsFolder)
{
if (System.IO.Path.GetPathRoot(m_Path) == m_Path)
{
// パス名とルートパスが同じならドライブのはず
m_ItemType = ShellItemType.Drive;
bValidated = true;
}
else if (Convert.ToBoolean(uFlags & ShellAPI.SFGAOF.SFGAO_FILESYSANCESTOR))
{
// ファイルシステムアイテムを含むことができるフォルダ＝ファイルフォルダ（だと思う）
m_ItemType = ShellItemType.Folder;
bValidated = true;
}
}
}
catch
{
// システムのアイテムの場合まともなパス名ではなくて、例外が出ちゃうので
// ここで例外キャッチ
}
if (!bValidated)
{
m_ItemType = ShellItemType.File;
bValidated = true;
}
}
else
{
if (this.IsFolder)
{
m_ItemType = ShellItemType.SpecialFolder;
}
else
{
m_ItemType = ShellItemType.SpecialItem;
}
}
}