dropdown list cancel option

Question

Muazma Ali 2021-12-26

回答： Simon Chan 2021-12-26

Hi

I have this code:

S={'NH4Cl'; 'MgCl2'; 'CaCl2'; 'KCl'; 'ZnSO4'; 'NaCl'; 'ZnBr2'; 'CH3CO2K';'HCOOK';' HCOONa'; 'CaBr2'};

str={'Choose the salts available'};

result=listdlg('Promptstring',str, 'ListSize', [100,100], 'ListString', S, 'SelectionMode', 'multiple');

% And I want to set up a disp sentence correponding to that user action where the user has pushed the buttton for cancel.

I tried with if result==[ ] but it didnt work.

Answer 1

Simon Chan 2021-12-26

Try function isempty:

if isempty(result)
    disp('User select to cancel');
end