MATLAB: Remove Items

guilistbox

How I can Remove a specific Items from listbox ??

Best Answer

You have to get the 'String' value of the listbox, which will be a cell array.

currentItems = get(hListbox, 'String');

Set the row for the item you want to remove equal to[].

newItems = currentItems;
newItems(rowToDelete) = []; % Or something like that - maybe it's {}

Then send the cell array back to the listbox with the

set(hListbox, 'String', newItems)

function.

Related Solutions

MATLAB: App Designer: How to delete items from listbox

Hi Marie,

Below code will delete your corresponding item.

 function ButtonPushed(app, event)
            [~,idx] = ismember(app.ListBox.Value,app.ListBox.Items);
            app.ListBox.Items(idx) = [];
 end

The below part in your code currentItems will give you the properties of the list box not the Item List in the listbox.

That's how get method works. Get method, gets the properties of the object you are referring in a struct. So that's why you see an error, you can see but you can't set all of the properties of an object because some of them might be protected.

hListBox = app.ListBox;
currentItems = get(hListBox);

When you debug your code(put red dot inside the pushbutton callback and evaluate the line currentItems = get(hListBox) with one step forward), you will see currentItems will give you the below properties:

currentItems = 
  struct with fields:
         Multiselect: 'off'
               Value: 'Item 1'
               Items: {'Item 1'  'Item 3'  'Item 4'}
           ItemsData: []
     ValueChangedFcn: [function_handle]
              Parent: [1×1 Figure]
    HandleVisibility: 'on'
          BusyAction: 'queue'
        BeingDeleted: 'off'
       Interruptible: 'on'
           CreateFcn: ''
           DeleteFcn: ''
                Type: 'uilistbox'
                 Tag: ''
            UserData: []
              Enable: 'on'
             Visible: 'on'
            FontName: 'Helvetica'
            FontSize: 12
          FontWeight: 'normal'
           FontAngle: 'normal'
           FontColor: [0 0 0]
     BackgroundColor: [1 1 1]
       InnerPosition: [147 333 100 74]
            Position: [147 333 100 74]
       OuterPosition: [147 333 100 74]

MATLAB: List box dissapearing when removing items from it.

I've done similar things, having a "Remove" button, if clicked, it removes the highlighted item in the list box. Here is my code for your reference. I remember that I have to take care of the synchronization of the 'string' and 'value' property of the list box. Also, you need to take care when the list box is empty.

contents = get(handles.lbDataItemSelected,'String');
if length(contents)<1; return; end; %if already empty, do nothing
Index=get(handles.lbDataItemSelected,'Value');
contents(Index)=[]; %remove the item
Value=Index-1;
if Value<1; Value=1;end %take care of exception
set(handles.lbDataItemSelected,'String',contents,'Value',Value);

Best Answer

Related Solutions

MATLAB: App Designer: How to delete items from listbox

MATLAB: List box dissapearing when removing items from it.

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