[GUI] How to create a directory of files of a specific folder using Listbox

How to create a directory of files of a specific folder using Listbox.

I basically want to fill a listbox with files from folder.

Thanks, Shane

Answer 1

[Image Analyst]

Use the dir() command. For example see the LoadImageList() function below:

%=====================================================================
% --- Load up the listbox with image files in folder handles.handles.ImageFolder
function handles=LoadImageList(handles)        
  ListOfImageNames = {};
  folder = handles.ImageFolder;
  if length(folder) > 0 
    if exist(folder,'dir') == false
      msgboxw(['Folder ' folder ' does not exist.']);
      return;
    end
%     fprintf(1, 'Getting list of images in folder: %s\n', folder);
  else
    fprintf('No folder specified as input for function LoadImageList.\n');
    WarnUser('No folder specified as input for function LoadImageList.');
    return;
  end
  % If it gets to here, the folder is good.
  ImageFiles = dir([folder '\*.*']);
  for Index = 1:length(ImageFiles)
    baseFileName = ImageFiles(Index).name;
    [folder2, name, extension] = fileparts(baseFileName);
    extension = upper(extension);
    switch lower(extension)
    case {'.png', '.bmp', '.jpg', '.tif'}
      % Allow only PNG, TIF, JPG, or BMP images
      ListOfImageNames = [ListOfImageNames baseFileName];
    otherwise
    end
  end
  set(handles.lstImageList,'string',ListOfImageNames);
  % Need to deselect everything otherwise if new folder has fewer files than the last folder used, the listbox won't show up.
  set(handles.lstImageList,'value', []);
    return; % from LoadImageList()

[Jan]

exist(folder,'dir') replies 7 if folder is existing and 0 otherwise. Comparing the replied value with false works, but might be misleading.

[Image Analyst]

Since exist() returns an integer (or maybe a double that is an integer) I should be comparing it to an integer. Maybe long ago it used to return a boolean - I don't remember - or maybe I just did that because it seemed more intuitive. I should probably change it (though I've got that code in dozens of files). Thanks for the tip.