Document Library Upload 'Choose Folder' programming Issues

Question

Hello,
I have a document library with folders and subfolders and all folders have unique security inheritance applied. Administrator is able to upload to any folder using below dialog. I want everyone who does not have permission to the folders and subfolders to
upload file. So I decided to programmatically incorporate the ‘Choose Folder’ functionalities via SPSecurity.RunwithElivatedPrivillages(Delegate(){ “…” });
I incorporated fetching document library and populate hierarchies inside the security code so code run as system account. However when I call
LaunchPickerTreeDialog
it populates based on user permission and hence if user does not have permission to folder, it does not populate at
all.
How can I make sure to give this Upload file functionality to all users via dialog box with full permission so it generates all folders and subfolder of the document library when user select ‘Choose Folder’ option?
Please note that if I type the correct doc library folder url, it successfully uploads to any folders as my code is inside the elevated permission. It is not good approach to give textbox to end user to type as they might make a mistake, so I need to provide
a ‘Choose folder’ dialog functions but I want to run as elevated privileges as everyone who do not have permission also can upload the file.
I also tried using
http://howtosharepoint.blogspot.com/2010/02/sharepoint-2010-folder-selector-and.html but the following code can’t be resolved
if
(_hiddenSelectionField != null
&& !string.IsNullOrEmpty(_hiddenSelectionField.Value))
  _listUrl.Text = GetObjectUrl(_hiddenSelectionField.Value);
  _hiddenSelectionField.Value = string.Empty; }
How can I declare and make use of  hiddenselectionField and
ListURL in my webpart?
Thanks

Answer 1

There's always a few challenges when trying to get around SharePoint's security model. Your options would be to try to extend the LaunchPickerTreeDialog if it's not sealed or to write a custom folder picker control. If you go the custom route, you could
even include it directly on that upload page to avoid the additional clicks.
Dimitri Ayrapetov (MCSE: SharePoint)