public List <DataSourceShell> GetFolderByPage(int pageSize, int pageindex, out bool isEndPage)
{
ShellAPI.IEnumIDList shllEnum = null;
IntPtr ptrIDLChild = IntPtr.Zero;
Int32 isGotChild = 0;
List <DataSourceShell> lst = new List <DataSourceShell>();
LogHelper.DebugFormat("shell GetFolderByPage ==>{0}", this.ParsingName);
if (this._blibrary) //support for windows 7 library
{
#region For library
ShellAPI.IShellItem psi;
if (ShellAPI.SHCreateShellItem(IntPtr.Zero, null, PIDL, out psi) == 0)
{
Int32 length = 0;
if (ShellAPI.SHLoadLibraryFromItem(psi, ref length) == 0)
{
for (int i = 0; i <= length; i++)
{
ShellAPI.IShellItem psiarry;
if (ShellAPI.SHGetShellItemsAt(psi, i, out psiarry) == 0)
{
DataSourceShell shItem = new DataSourceShell(psiarry);
lst.Add(shItem);
}
}
isEndPage = true;
return(lst);
}
}
#endregion
}
#region init
isEndPage = false;
// Get the IEnumIDList interface pointer.
ShellAPI.SHCONTF flags = ShellAPI.SHCONTF.SHCONTF_FOLDERS;
if (shllEnum != null)
{
Marshal.ReleaseComObject(shllEnum);
}
uint result = ShellFolder.EnumObjects(IntPtr.Zero,
flags
, out shllEnum);
if (result != 0)
{
isEndPage = true;
LogHelper.Debug("result != 0 ==> true");
return(null);
}
#endregion
#region reset enum
ptrIDLChild = IntPtr.Zero;
isGotChild = 0;
shllEnum.Reset();
#endregion
#region skip pageIndex*pageSize
// Grab the first enumeration.
for (int i = 0; i <= ((pageindex - 1) * pageSize); i++)
{
// Free the PIDL and reset counters.
Marshal.FreeCoTaskMem(ptrIDLChild);
ptrIDLChild = IntPtr.Zero;
isGotChild = 0;
// Grab the next item.
shllEnum.Next(1, out ptrIDLChild, out isGotChild);
}
#endregion
LogHelper.Debug("enum .....");
#region enum item
int itemIndex = 0;
while (itemIndex < pageSize)
{
SpecialFolderType specialFolderType = CheckSpecialFolderType(shellFolder, ptrIDL, ptrIDLChild);
if (specialFolderType != SpecialFolderType.Internet &&
specialFolderType != SpecialFolderType.RecycleBin &&
specialFolderType != SpecialFolderType.MyComputerControlPanel &&
specialFolderType != SpecialFolderType.DesktopControlPanel &&
(SpecialFolderType != SpecialFolderType.MyComputer ||
(specialFolderType != SpecialFolderType.MyDocuments &&
specialFolderType != SpecialFolderType.SharedDocuments))
)
{
LogHelper.DebugFormat("enum-1 : {0}", ptrIDLChild);
// Create the new ShellItem object.
DataSourceShell shItem = new DataSourceShell(shellRoot, ptrIDLChild, this, false, specialFolderType);
if (shItem.IsFolder && !shItem.IsStream)
{
lst.Add(shItem);
}
LogHelper.DebugFormat("enum : {0}", shItem.ParsingName);
}
// Free the PIDL and reset counters.
Marshal.FreeCoTaskMem(ptrIDLChild);
ptrIDLChild = IntPtr.Zero;
isGotChild = 0;
// Grab the next item.
shllEnum.Next(1, out ptrIDLChild, out isGotChild);
if (ptrIDLChild.Equals(IntPtr.Zero) && isGotChild == 0)
{
LogHelper.Debug("ptrIDLChild.Equals(IntPtr.Zero) && iGotChild == 0 ==> true");
isEndPage = true;
break;
}
itemIndex++;
}
#endregion
LogHelper.Debug("enum <==");
#region sort item
// AH: If _getfolders flag is true, sort treeview items.
if (this.SpecialFolderType != SpecialFolderType.MyComputer)
{
List <DataSourceShell> tempLst = new List <DataSourceShell>();
IComparer <DataSourceShell> comparer = new SortAscending();
for (int i = 0; isRoot && i < lst.Count; i++)
{
if (lst[i].SpecialFolderType == SpecialFolderType.MyComputer ||
lst[i].SpecialFolderType == SpecialFolderType.DesktopControlPanel ||
lst[i].SpecialFolderType == SpecialFolderType.Network ||
lst[i].SpecialFolderType == SpecialFolderType.MyDocuments ||
lst[i].SpecialFolderType == SpecialFolderType.SharedDocuments ||
lst[i].SpecialFolderType == SpecialFolderType.CurrentUserProfile
)
{
tempLst.Add(lst[i]);
lst.RemoveAt(i);
i--;
}
}
lst.Sort(comparer);
for (int i = 0; isRoot && i < tempLst.Count; i++)
{
lst.Insert(i, tempLst[i]);
}
}
#endregion
LogHelper.Debug("enum end==");
return(lst);
}
/// <summary>
/// Retrieves an array of ShellItem objects for sub-folders of this shell item.
/// always sub-folders, non file
/// </summary>
/// <returns>ArrayList of ShellItem objects.</returns>
public List <DataSourceShell> GetSubItems()
{
//this._getfolders = getfolders;
//T#81733 - BIU support for Windows 7 libraries and the new Windows 7 open file dialog
if (this._blibrary) //support for windows 7 library
{
List <DataSourceShell> lst = new List <DataSourceShell>();
ShellAPI.IShellItem psi;
if (ShellAPI.SHCreateShellItem(IntPtr.Zero, null, PIDL, out psi) == 0)
{
Int32 length = 0;
if (ShellAPI.SHLoadLibraryFromItem(psi, ref length) == 0)
{
for (int i = 0; i <= length; i++)
{
ShellAPI.IShellItem psiarry;
if (ShellAPI.SHGetShellItemsAt(psi, i, out psiarry) == 0)
{
DataSourceShell shItem = new DataSourceShell(psiarry);
lst.Add(shItem);
}
}
return(lst);
}
}
return(lst);
}
else
{
// Make sure we have a folder.
if (IsFolder == false)
{
throw new Exception("Unable to retrieve sub-folders for a non-folder.");
}
// Get the IEnumIDList interface pointer.
ShellAPI.SHCONTF flags =
ShellAPI.SHCONTF.SHCONTF_INCLUDEHIDDEN;
flags |= ShellAPI.SHCONTF.SHCONTF_FOLDERS;
ShellAPI.IEnumIDList pEnum = null;
if (ShellFolder != null)
{
uint result = ShellFolder.EnumObjects(IntPtr.Zero,
flags
, out pEnum);
if (result == 0)
{
List <DataSourceShell> lst = GetPage(pEnum);
if (pEnum != null)
{
Marshal.ReleaseComObject(pEnum);
}
return(lst);
}
}
return(new List <DataSourceShell>());
}
}