clear listbox in gui

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marwa marwan
marwa marwan 2017-12-15
评论： Hossein Davari 2021-3-5
I have a listbox in gui that display the result of execution... when I want to run another time I want the past resut in listbox to be removed and display the message(please wait the result)and then the new result is display i just dont know how to clear the listbox and display that message.

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回答（2 个）

Image Analyst
Image Analyst 2017-12-15
Did you try to set it to null?
handles.listbox1.String = [];
  5 个评论
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Image Analyst
Image Analyst 2017-12-17
Using a waitbar is not required for clearing a listbox. That's a totally separate issue. Perhaps you cleared it and immediately went into a computationally intensive loop and so the screen did not refresh. To have it refresh immediately, use drawnow.
handles.listbox1.String = [];
drawnow;
marwa marwan
marwa marwan 2017-12-18
I know its separate issue but I just didnt know why my list box didnt refreshed so I used wait bar just to knowledge the GUI user that the program is under execution thank you for explination that is exactly what I want..

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Hossein Davari
Hossein Davari 2021-3-5
ListBoxHandle.Items = {}; %clear the list of items in listbox
edg = errordlg('Message');
waitfor(edg) %program will continue when the dialog box is closed.
drawnow
  2 个评论
Walter Roberson
Walter Roberson 2021-3-5
Items is, I suspect, for list boxes in app designer.

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