How do I update a listbox with the strings which I enter using a inputdlg command? I tried the same, but when I enter the second string, the first string gets replaced by the new one.

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matlablearner 2014-7-11

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https://ww2.mathworks.cn/matlabcentral/answers/141465-how-do-i-update-a-listbox-with-the-strings-which-i-enter-using-a-inputdlg-command-i-tried-the-same

评论： Geoff Hayes 2014-7-11

I have entered the below code in the corresponding function. prompt={'Please enter the component name:'}; name='Input Component Name'; numlines=1; defaultanswer={'geometry'}; handles.answer=inputdlg(prompt,name,numlines,defaultanswer,'on'); set(handles.componentlistbox,'String',handles.answer);

My objective is, everytime when the dialogbox asks me to enter a text, the entered text should get added in the listbox in addition to the already typed text.I am using a GUIDE gui for this task. Problems I face: Each time I enter a string in the input dialog box, the previously entered string disappears. I would like to add the newly typed string below the existing string. Kindly request your support.

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Answer 1

Geoff Hayes 2014-7-11

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https://ww2.mathworks.cn/matlabcentral/answers/141465-how-do-i-update-a-listbox-with-the-strings-which-i-enter-using-a-inputdlg-command-i-tried-the-same#answer_144674

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All you need to do is append the new string to the existing list

 % prompt the user for some input
 answer = inputdlg(prompt,name,numlines,defaultanswer,'on');
 % get the current list box selections
 selections = get(handles.componentlistbox,'String');
 % append the answer to the list
 selections = [selections ; answer];
 % update the list box with the new selection
 set(handles.componentlistbox,'String',selections);

Note that in the above, the answer is not being saved to handles.answer as that duplicates what is in the list box.

Note also that you should put in a check of some kind to ensure that duplicate entries aren't added to the list.

Try the above and see what happens!

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matlablearner 2014-7-11

Thanks a lot for your quick response. The code solves my requirement. As you have mentioned, I will look for a way to ensure that same name entries are not added to the list again.

Have a Nice weekend. Cheers.