//Copyright (c) Microsoft Corporation. All rights reserved. using System; using System.Collections; using System.Collections.Generic; using System.Runtime.InteropServices; using MS.WindowsAPICodePack.Internal; namespace Microsoft.WindowsAPICodePack.Shell { class ShellFolderItems : IEnumerator<ShellObject> { #region Private Fields private IEnumIDList nativeEnumIdList = null; private ShellObject currentItem = null; ShellContainer nativeShellFolder; #endregion #region Internal Constructor internal ShellFolderItems(ShellContainer nativeShellFolder) { this.nativeShellFolder = nativeShellFolder; HRESULT hr = nativeShellFolder.NativeShellFolder.EnumObjects( IntPtr.Zero, ShellNativeMethods.SHCONT.SHCONTF_FOLDERS | ShellNativeMethods.SHCONT.SHCONTF_NONFOLDERS, out nativeEnumIdList); if( !CoreErrorHelper.Succeeded( (int)hr ) ) { if( hr == HRESULT.E_ERROR_CANCELLED ) { throw new System.IO.FileNotFoundException( ); } else { Marshal.ThrowExceptionForHR( (int)hr ); } } } #endregion #region IEnumerator<ShellObject> Members public ShellObject Current { get { return currentItem; } } #endregion #region IDisposable Members public void Dispose() { if (nativeEnumIdList != null) { Marshal.ReleaseComObject(nativeEnumIdList); nativeEnumIdList = null; } } #endregion #region IEnumerator Members object IEnumerator.Current { get { return currentItem; } } /// <summary> /// /// </summary> /// <returns></returns> public bool MoveNext() { if (nativeEnumIdList == null) return false; IntPtr item; uint numItemsReturned; uint itemsRequested = 1; HRESULT hr = nativeEnumIdList.Next(itemsRequested, out item, out numItemsReturned); if (numItemsReturned < itemsRequested || hr != HRESULT.S_OK) return false; currentItem = ShellObjectFactory.Create(item, nativeShellFolder); return true; } /// <summary> /// /// </summary> public void Reset() { if(nativeEnumIdList != null) nativeEnumIdList.Reset(); } #endregion } }
By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.
If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.
This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)