In AppDesigner, how to input a CSV file using a checkbox?

I would like add a checkbox to my App Designer GUI, so that when checked, it opens a file explorer field (similar to a load button) and imports a selected CSV file.

So ulimately, when I hit 'calculate' on my GUI, if the checkbox is selected, use the imported CSV in my calculations, otherwise when not selected, it doesn't use the CSV data. Basically an 'Include a CSV datafile in calcultions' checkbox...

What is the best way to accomplish what I am trying to do?

Do I need to import that CSV data to a variable to store it, then check if the checkbox is selected before calculating?

Thanks in advance.

Answer 1

[Cris LaPierre]

Looks like you might want to use uigetfile in the checkbox callback function.

[Scotty Mac]

Here is my code. Thanks @Cris LaPierre.

       % Value changed function: InclCalibrationFileCheckBox
        function InclCalibrationFileCheckBoxValueChanged(app, event)
            value = app.InclCalibrationFileCheckBox.Value;

            if (value == 1) % Checkbox is Checked   
                 % Allow the user to select any CSV file
                [file,path] = uigetfile('*.csv');
                if isequal(file,0)
                    % User selected cancel
                    return;
                else
                    csvData = readmatrix(file);
                end                
            end
            
            %% Placeholder for how to add csvData to the calculation.
            
        end
    end