Inserting rows into uitable??

3 次查看（过去 30 天）
Animesh
Animesh 2013-12-24
评论： Animesh 2013-12-25
I have a simple gui containing two edit boxes and a push button.On pressing the push button the values of the edit boxes are inserted into a uitable.The code for pushback button callback is:
function pushbutton1_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
name=get(handles.edit1,'String');%the value of the first edit box
Idno=get(handles.edit2,'String');%the value of the second edit box
g=exist('C:\Users\Animesh\Documents\MATLAB\dbt3.mat')%ckecks for the existence of table
if g==0
comp=[];
dbt3 = uitable('Data',comp,'Position', [25 25 700 200]);
Exist=get(dbt3, 'Data');
New={name,Idno};
comp=[Exist;New]
set(dbt3, 'Data',comp);
save('dbt3')
else
load('C:\Users\Animesh\Documents\MATLAB\dbt3.mat')
dbt3 = uitable('Data',comp,'Position', [25 25 700 200]);
Exist=get(dbt3, 'Data');
New={name,Idno};
comp=[Exist;New]
set(dbt3, 'Data',comp);
save('dbt3')
end
The problem is that when I run it for the first time the control is in the if block and the first row is added into the uitable.But when i run the 2nd time the control goes to the else block but the next row added is the same as the previous row.. Can anyone help?? Thanks a lot in advance..

请先登录，再回答此问题。

采纳的回答

Walter Roberson
Walter Roberson 2013-12-24
Why would it be different() ? When you load(), you are not affecting "name" or "Idno". Unless, that is, one of those happens to be the name of a variable stored in the .mat file, which is something I would not assume.
It is poor programming practice to rely on load() overwriting variables in the workspace. It is better to use the form of load() that assigns to a variable, and pull the appropriate data out of the variable.
InData = load('C:\Users\Animesh\Documents\MATLAB\dbt3.mat');
Idno = InData.Idno;
...
  6 个评论
显示 4更早的评论
Walter Roberson
Walter Roberson 2013-12-25
Every call to uitable creates a new uitable object and does not remove the old object. The old object might be covered over by the new object.
You should be using load() to return a structure, and you should be specific about what you are save()'ing.
I don't think you should be using load() / save() here at all. See
http://matlab.wikia.com/wiki/FAQ#How_can_I_share_data_between_callback_functions_in_my_GUI.3F
Animesh
Animesh 2013-12-25
Thanks a lot sir for helping me throughout..I got my error.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Whos 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by