MATLAB GUI: I want to display an error message if user selects the wrong file type

MATLAB GUI HELP:

I have an option for users to open wav files (using uigetfile). However, this doesn't stop them opening all file types and when they do this it breaks my GUI.

How can I get an error message to occur when they don't open a wav file?

Many thanks. I really appreciate your help.

Best regards

Answer 1

[Image Analyst]

Try this fairly robust code:

numberOfTries = 0;
while numberOfTries < 20  % Failsafe
  % Get the name of the file that the user wants to use.
  startingFolder = pwd; % Whatever you want.
  defaultFileName = fullfile(startingFolder, '*.*');
  [baseFileName, folder] = uigetfile(defaultFileName, 'Select a file');
  if baseFileName == 0
    % User clicked the Cancel button.
    break;
  end
  fullFileName = fullfile(folder, baseFileName)
  [folder, baseFileName, extension] = fileparts(fullFileName)
  if strcmpi(extension, '.wav')
    break; % out of while loop
  else
    message = sprintf('Error: you must pick a wav file, not a "%s" file.', extension);
    uiwait(warndlg(message));
  end
end

[Paul]

Thanks, this is great

[Image Analyst]

You could also try to force them to pick a wave file by only showing them:

defaultFileName = fullfile(startingFolder, '*.wav');