Selective selection in listbox
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Hello, I was looking for a way to control further the possibility of selection (modification of the property 'Value' of a listbox) to make only the items who are present in the listbox. Indeed as seen in the image,
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/167872/image.png)
there is only four items in the listbox, but it is possible to select a non existent item by being able to select 'Value' that will be off limit from the box. It happen to cause an error when i use a delete function because of this over permissive selection. After many research on the forum and other place I couldn't manage to find ways to limit the value of the 'Value' property.
Thanks in advance for your help and time.
ps : I'm using the Matlab 2011b version
4 个评论
Image Analyst
2017-12-20
There were a lot of changes starting with R2014b. What version are you using?
Did my solution below work?
What is handles.counter? Is it supposed to be the number of items in the listbox? Why are you setting the 'Max' property? As I remember it, it was just 1 or 2 depending on whether you want it to be single selection or multiselection, not some arbitrary number.
回答(1 个)
Image Analyst
2017-12-19
Try this:
listBoxItems = handles.listbox1.String;
selectedItems = [];
for k = 1 : length(listBoxItems)
if length(strtrim(listBoxItems{k})) > 0
% Only select items that are not all whitespace.
selectedItems = [selectedItems, k];
end
end
handles.listbox1.Value = selectedItems;
2 个评论
ET1994
2018-11-17
Image Analyst, I want to choose a care from the listbox and set an if statement if one is chosen from the list the corresponding x% appear in a static Text.
Can you help for the coding?
![Capture.JPG](https://www.mathworks.com/matlabcentral/answers/uploaded_files/195449/Capture.jpeg)
Image Analyst
2018-11-17
selectedItem = handles.listbox1.Value
if selectedItem == 3
% Accident, so do whatever. It's the third item after Keyword and a blank line.
elseif selectedItem == 4
% Childbrith, so do whatever.
etc.
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