/// <summary>Initializes a new instance of the <see cref="ShellItem"/> class.</summary>
/// <param name="parent">The parent Shell item.</param>
/// <param name="pidl">The ID List of the child.</param>
public ShellItem(ShellItem parent, PIDL pidl)
{
if (parent == null)
{
throw new ArgumentNullException(nameof(parent));
}
if (pidl == null || pidl.IsInvalid)
{
throw new ArgumentNullException(nameof(pidl));
}
if (!parent.IsFolder)
{
throw new ArgumentException("Parent argument must be a folder.");
}
object ppv;
if (IsMinVista)
{
SHCreateItemWithParent(PIDL.Null, parent.GetIShellFolder(), pidl, typeof(IShellItem).GUID, out ppv);
}
else
{
var idList = PIDL.Combine(parent.PIDL, pidl);
ppv = new ShellItemImpl(idList, false);
}
Init((IShellItem)ppv);
}
/// <summary>Gets a child <see cref="ShellItem"/> reference from a parent and child PIDL.</summary>
/// <param name="relativePidl">A valid relative PIDL.</param>
/// <returns>A child <see cref="ShellItem"/> reference.</returns>
public ShellItem this[PIDL relativePidl]
{
get
{
if (relativePidl == null || relativePidl.IsInvalid)
{
throw new ArgumentNullException(nameof(relativePidl));
}
object ppv;
if (IsMinVista)
{
SHCreateItemWithParent(PIDL.Null, iShellFolder, relativePidl, typeof(IShellItem).GUID, out ppv);
}
else
{
ppv = new ShellItemImpl(PIDL.Combine(PIDL, relativePidl), false);
}
return(Open((IShellItem)ppv));
}
}
/// <summary>Gets the <see cref="ShellItem"/> with the specified child name.</summary>
/// <value>The <see cref="ShellItem"/> instance matching <paramref name="childName"/>.</value>
/// <param name="childName">Name of the child item.</param>
/// <returns>The <see cref="ShellItem"/> instance matching <paramref name="childName"/>, if it exists.</returns>
public ShellItem this[string childName]
{
get
{
if (string.IsNullOrEmpty(childName))
{
throw new ArgumentNullException(nameof(childName));
}
object ppv;
if (IsMinVista)
{
SHCreateItemFromRelativeName(iShellItem, childName, BindContext, typeof(IShellItem).GUID, out ppv).ThrowIfFailed();
}
else
{
SFGAO attr = 0;
iShellFolder.ParseDisplayName(IntPtr.Zero, null, childName, out uint _, out var tempPidl, ref attr);
ppv = new ShellItemImpl(PIDL.Combine(PIDL, tempPidl), false);
}
return(Open((IShellItem)ppv));
}
}
