Saving Items Different listbox in a text file (App designer)

It's the first time i'm using app designer i'm trying to save the items of different Listbox in one file.txt

I report the code of the list box.

The structure of the file should be "

Firstlist:

Item=Itemdata

Item1=ItemData1

Secondlist:

Itemsecondlist=Itemdatasecondlist

Thirdlist:

Itemthitdlist=Itemdatathirdlist

.."

function AddButtonPushed(app, event)
            %when the Addbutton is pushed the listbox is filled with the
            %string written in the editfield and a code is associated in
            %the ItemsDAta
            app.ComandiListBox.Items = [string(app.ComandiListBox.Items),string(app.aggiungiEditField.Value)];
            app.ComandiListBox.ItemsData = [app.ComandiListBox.ItemsData, app.codiceEditField.Value];
end
%I've tried something like that for the first listbox but isn't working
 function SaveButtonPushed(app, event)
            C=num2cell(app.ComandiListBox.ItemsData);
            C2=[app.ComandiListBox.Items; C];
           
            fileID = fopen('prova1.txt','w');
            formatSpec = '%s=%d\n';
            
            [nrows,ncols] = size(C2);
                for row = 1:nrows
                    fprintf(fileID,formatSpec,C2{row,:});
                end
           fclose(fileID);
        end

Answer 1

[Abhilash Padma]

If you want to save the items of a list box when selected, you can use the ‘’ValueChangedFcn” callback of list box to save the items in a text file. See the code below where I have used a list box in my app with different values and saving the value when selected:

function cityListBoxValueChanged(app, event)
    value = app.cityListBox.Value;
    fileID = fopen('example2.txt','w');
    fprintf(fileID,'%s = %s','val1',value); 
end