I'm getting an error is Attempt to reference field of non-structure array.

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Maruthi Maruthi 2017-3-25

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331855-i-m-getting-an-error-is-attempt-to-reference-field-of-non-structure-array

评论： Adam 2017-3-25

function varargout = user_name(varargin) % USER_NAME MATLAB code for user_name.fig % USER_NAME, by itself, creates a new USER_NAME or raises the existing % singleton*. % % H = USER_NAME returns the handle to a new USER_NAME or the handle to % the existing singleton*. % % USER_NAME('CALLBACK',hObject,eventData,handles,...) calls the local % function named CALLBACK in USER_NAME.M with the given input arguments. % % USER_NAME('Property','Value',...) creates a new USER_NAME or raises the % existing singleton*. Starting from the left, property value pairs are % applied to the GUI before user_name_OpeningFcn gets called. An % unrecognized property name or invalid value makes property application % stop. All inputs are passed to user_name_OpeningFcn via varargin. % % *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one % instance to run (singleton)". % % See also: GUIDE, GUIDATA, GUIHANDLES

% Edit the above text to modify the response to help user_name

% Last Modified by GUIDE v2.5 20-Mar-2017 14:49:24

% Begin initialization code - DO NOT EDIT gui_Singleton = 1; gui_State = struct('gui_Name', mfilename, ... 'gui_Singleton', gui_Singleton, ... 'gui_OpeningFcn', @user_name_OpeningFcn, ... 'gui_OutputFcn', @user_name_OutputFcn, ... 'gui_LayoutFcn', [] , ... 'gui_Callback', []); if nargin && ischar(varargin{1}) gui_State.gui_Callback = str2func(varargin{1}); end

if nargout [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:}); else gui_mainfcn(gui_State, varargin{:}); end % End initialization code - DO NOT EDIT end

% --- Executes just before user_name is made visible. function user_name_OpeningFcn(hObject, eventdata, handles, varargin) % This function has no output args, see OutputFcn. % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) % varargin command line arguments to user_name (see VARARGIN)

% Choose default command line output for user_name handles.output = hObject;

% Update handles structure guidata(hObject, handles);

% UIWAIT makes user_name wait for user response (see UIRESUME) % uiwait(handles.figure1);

end % --- Outputs from this function are returned to the command line. function varargout = user_name_OutputFcn(hObject, eventdata, handles) % varargout cell array for returning output args (see VARARGOUT); % hObject handle to figure % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure varargout{1} = handles.output;

end % --- Executes on button press in Signup. function Signup_Callback(hObject, eventdata, handles) % hObject handle to Signup (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) fig=openfig('signup','reuse','visible'); set(fig,'Color',get(0,'defaultUicontrolBackgroundColor'));

end

% --- Executes on button press in signin. function signin_Callback(hObject, eventdata, handles) % hObject handle to signin (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA) global user_name_exist; uname1 = get(handles.uname,'String'); %edit1 being Tag of ur edit box if isempty(uname1) % errordlg('Please enter Username'); uiwait(warndlg('Please Enter Username')); end conn = database('mani','root','MARUTHI'); curs=exec(conn,'select uname from user2'); curs=fetch(curs);curs.Data

for i=numel(curs.Data) if(strcmp(curs.Data(i),uname1)) disp(curs.Data(i)) % Create figure user_name_exist=1; disp(user_name_exist); disp('hai'); break;

      else
          user_name_exist=0;
          continue;%figure('Name','imgsel.fig');
      end
end
     if(user_name_exist==1)
   %  Image_mag(handles.uname);
    fig=openfig('Image_mag','reuse','visible');
  set(fig,'Color',get(0,'defaultUicontrolBackgroundColor'));
% handles.fig=figure('Units','Pixels', ... 
 %    'Position',[100 100 500 500]);
  % msgbox(size(curs.Data));
 %han1111dles.signin=Image_mag;
 %set(handles.fig,Image_mag,{ImagesExample,handles});
     else
         uiwait(warndlg('Please enter a valid User name'));
     end
 close(curs);
      close(conn);
 end

function uname_Callback(hObject, eventdata, handles) % hObject handle to uname (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of uname as text % str2double(get(hObject,'String')) returns contents of uname as a double guidata(hObject, handles);

end

% --- Executes during object creation, after setting all properties. function uname_CreateFcn(hObject, eventdata, handles) % hObject handle to uname (see GCBO) % eventdata reserved - to be defined in a future version of MATLAB % handles empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows. % See ISPC and COMPUTER. if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor')) set(hObject,'BackgroundColor','white'); end

end

I written the above code and execute well yesterday,but today while executing this code Attempt to reference field of non-structure array.

Attempt to reference field of non-structure array.

Error in signup>submit1_Callback (line 106) uname1 = get(handles.u_name,'String');

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in signup (line 42) gui_mainfcn(gui_State, varargin{:});

Error in @(hObject,eventdata)signup('submit1_Callback',hObject,eventdata,guidata(hObject))

Error while evaluating uicontrol Callback

Please help me.....

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Adam 2017-3-25

Please format your code properly so that it is readable. Also your error points to a submit1_Callback. Of all the code you have included this function doesn't appear to be here.

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Answer 1

Maruthi Maruthi 2017-3-25

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/331855-i-m-getting-an-error-is-attempt-to-reference-field-of-non-structure-array#answer_260298

在 MATLAB Online 中打开

I'm getting error in signup.m is "attempt to reference field of non-structure array." and in the user_name.m file have a for loop that is not at all executing... Please help me the code for working properly.

Attempt to reference field of non-structure array.
Error in signup>submit1_Callback (line 106)
uname1 = get(handles.u_name,'String');
Error in gui_mainfcn (line 96)
        feval(varargin{:});
Error in signup (line 42)
    gui_mainfcn(gui_State, varargin{:});
Error in
@(hObject,eventdata)signup('submit1_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating uicontrol Callback

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Maruthi Maruthi 2017-3-25

Mam, I sent the query again... Please reply me as early as possible,

Adam 2017-3-25

Why have you added this as an answer and also accepted it? People are far less likely to come and answer your questions if thy see there is already an accepted answer.

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I'm getting an error is Attempt to reference field of non-structure array.

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I'm getting an error is Attempt to reference field of non-structure array.

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