Actually, building on Shameer's suggestion,
[file,path] = uigetfile('*.csv','Select a CSV file');
if ischar(file)
filename=fullfile(path,file);
S=uiimport(filename);
end
let's you "have your cake and eat it, too!" :) Use uigetfile for the file dialog and then pass the selected file to uiimport.
You could wrap this in an outer loop, to allow repetitive calls, but you'll have to be careful because the uiimport is asynchronous and the dialog box may reappear again before you're ready...I'm sure there must be some way around it but didn't have time to 'spearmint...
Good luck...
Or, of course, you can just live with the default file selection list and type *.csv in the selection box to get the list...
