关于GUI编程的一个问题！

xipizb

<P>各位好！我想请教大家一个问题：我用matlab的GUI设计工具设计了一个界面，界面是一个listbox控件，控件里面有8项，每次用户选中某一项时会弹出相应的新窗口，以下是我编写的listbox控件的callback例程代码：<BR><BR>function listbox1_Callback(hObject, eventdata, handles)<BR>% hObject    handle to listbox1 (see GCBO)<BR>% eventdata  reserved - to be defined in a future version of MATLAB<BR>% handles    structure with handles and user data (see GUIDATA)</P>
<P>% Hints: contents = get(hObject,'String') returns listbox1 contents as cell array<BR>%        contents{get(hObject,'Value')} returns selected item from listbox1<BR>index=get(handles.listbox1,'value');<BR>switch index<BR>    case 1<BR>        openfig('xxbxlsbcs','reuse');<BR>    case 2<BR>        openfig('fcbxlsbcs','reuse');<BR>    case 3<BR>        openfig('gcbxlsbcs','reuse');<BR>    case 4<BR>        openfig('sbtbxlsbcs','reuse');<BR>    case '5<BR>        openfig('sblbxlsbcs','reuse');<BR>    case 6<BR>        openfig('gpbxlsbcs','reuse');<BR>    case 7<BR>        openfig('mlbxlsbcs','reuse');<BR>    case 8<BR>        openfig('jsbxlsbcs','reuse');<BR>end<BR>   但是我每次在控件中选中某一项时，matlab窗口就显示以下错误代码：<BR><BR>??? Attempt to reference field of non-structure array.</P>
<P>Error in ==&gt; sbcssr&gt;listbox1_Callback at 86<BR>index=get(handles.listbox1,'value');</P>
<P>Error in ==&gt; gui_mainfcn at 75<BR>        feval(varargin{:});</P>
<P>Error in ==&gt; sbcssr at 44<BR>    gui_mainfcn(gui_State, varargin{:});</P>
<P>??? Error while evaluating uicontrol Callback.<BR><BR>请高手们帮指导一下我的编程出了什么问题，不胜感激！</P>

glise

错误和给的代码好像没什么关系阿

bainhome

错误很可能是由于前面用GUIhandles和guidata搜集handle变成结构数组时,没有对相应的句柄标明tag,导致域名handles.listbox1不存在而致.单步调一下即可,应该不难