Adding multiple items in GUI listbox?

Hello Everyone,

I am a newbie at Matlab. I am trying to create a listbox and populate it with audio filenames that is select by the user with upload pushbutton. I did it successfully, however when I try to select a different file by clicking the upload push button, the file names concat. I want the filename in a different line (i.e, value 2 of listbox)

This is what I did!

global SoundNameArray;

[filename, filepath, cCheck] = uigetfile('*.mp3', ... 'Select an audio file','MultiSelect','on');

SoundNameArray = [SoundNameArray filename];

h = msgbox(SoundNameArray);

% Check if the user selected one file or multiple

if(cCheck ~=0)

    %Reset selection to first entry
    set(handles.select_audio, 'Value', 1);

    %Show selected file names in the listbox
    set(handles.select_audio,'String', SoundNameArray);
else
end

I would be really grateful if anyone could help. Merry Christmas :)

Answer 1

[Walter Roberson]

The third output of uigetfile is the filter index, which will only be 0 if no file is selected.

With multiselect on, the filename will be a simple character vector if only one file is selected but will be a cell array of character vectors if more than one is selected. In order to have your listbox list multiple items you should be passing a cell array of character vectors as the string property. The easiest way to fix the code is to use

SoundNameArray = [SoundNameArray cellstr(fullfile(filepath, filename)) ];

[Nirajan Shrestha]

Thank you, Walter. Your answer helped me and I further found out how it (cell array) can be extracted and changed into string when I used audioread using that filename. Thank you so much. Much appreciated.