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LMDShellFolder.ChDir takes ages to display disconnected network drives

Michael Tesch
in LMD IDE-Tools Vote Up0Vote Down
I am using a form with just LMDShellFolder, LMDShellTree, and LMDShellList. LMDShellFolder.ChDir takes ages to display disconnected network drives in the LMDShellTree/LMDShellList. How can I hide or exclude such drives from the display? Or is there a different approach?

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  • 6 Comments sorted by Votes Date Added
  • Michael Tesch
    edited June 16 Posts: 11Vote Up0Vote Down
    I found no 
    LMDShellFolder1.ShowNetworkFolders := False 
    or 
    LMDShellFolder1.ExcludeDrives ....

    LMDShellFolder1.ExcludeDrives LMS
    LMDShellFolder1.ShowNetworkFolders := LMDShellFolder1.ShowNetworkFolders := 
    LMDShellFolder1.ShowNetworkFolders := False;LMDShellFolder1.ShowNetworkFolders := False;
    LMDShellFolder1.ShowNetworkFolders := False;
  • Eugene Balabuev (LMD)
    Posts: 0Vote Up0Vote Down
    I can confirm the issue. Need some time to decide what can be done.
  • Eugene Balabuev (LMD)
    edited July 29 Posts: 0Vote Up0Vote Down
    1) I've added new IsSlow property to TLMDShellItem class (SFGAO_ISSLOW). It can be theoretically used for filtering, but it seems that it does not set for my network drives.

    2) I've changed the way, a tree node detects, whether it has children (to show [+] expand button). Now it based on SFGAO_HASSUBFOLDER attribute, which should not block the program in case of inaccessible network drives, according to MS documentation. However, this does not solve the issue completely.

    3) I was unable to find good way to filtering out network drives, the only was, which worked for me is to use tree or list OnFilterItem event and set Filtered property to True as follows:

    procedure TForm1.LMDShellList1FilterItem(Sender: TObject;
      ShellItem: TLMDCustomShellItem; var Accept: Boolean);
    begin
      Accept := not ShellItem.DisplayName.Contains('\\');
    end;

    But, as you can see, we looking at DisplayName, which is not a good technical solution.

  • Michael Tesch
    edited August 3 Posts: 11Vote Up0Vote Down
    The first impression is good. After mapping a new network drive, it appeared in neither the tree view nor the list. Isn't there some way to configure this so that it applies only to disconnected drives??
  • Eugene Balabuev (LMD)
    Posts: 0Vote Up0Vote Down
    > Isn't there some way to configure this so that it applies only to disconnected drives??

    No. As I understand after experimentation, Windows itself don't know whether drive is connected or not.
  • Michael Tesch
    Posts: 11Vote Up0Vote Down
    Ok. Thank you for your support. You can close this case.
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