MATLAB: GUI report error if something is wrong

errorgui

I have a GUI that has a static text box which I use to update for the status of the code. The GUI needs to load data from an excel file (xlsread), and sometimes the load fails due to mistakes in the data file. I want to have a string saying "Error loading data!" to appear if the xlsread function fails. Is there a good way to do it. Thanks

Best Answer

You could use try/catch statements where you use the xlsread function. Edit the code in your callback function like this:
try
    NumData = xlsread(FileName);  %wrap your xlsread with try/catch statement
catch
    set(handles.text1, 'String', 'Error loading data!'); %update your status text
    drawnow; %redraw GUI to ensure the new string shows
    return   %end the callback function prematurely due to error
end
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