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How to got correct answer in if condition in GUI?

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Gytis Raudonius
Gytis Raudonius 2016-12-18
回答： Gytis Raudonius 2016-12-30
Hi, after retrieve all data about driver got other problem, with if condition. When car number plate correct if condition work great, but if i do task that car number plate not in database i got error. Please help me, where i do mistake. Code add below. P.S. Sorry for my bad english
conn = database('baze', 'root', 'root', 'Vendor', 'MYSQL', 'Server', 'localhost', 'PortNumber', 3306);
setdbprefs('datareturnformat','structure');
word = get(handles.edit4,'String');
if iscell(word) && numel(word) == 1
word = word{1};
end
if ~ischar(word) || isempty(word);
error('A valid string must be supplied!');
end
sqlquery = ['select vardas, pavarde, laipsnis, pareigos, telefonas, marke, numeris, tarnyba, nuotrauka from info '...
'where numeris = ' '''' word ''''];
curs = exec(conn, sqlquery);
setdbprefs('DataReturnFormat','cellarray');
curs = fetch(curs);
numeris = curs.data{1,7};
vardas = curs.data{1,1};
pavarde = curs.data{1,2};
laipsnis = curs.data{1,3};
pareigos = curs.data{1,4};
telefonas = curs.data{1,5};
marke = curs.data{1,6};
tarnyba = curs.data{1,8};
nuotrauka = curs.data(1,9);
set(handles.edit5,'string',vardas);
set(handles.edit6,'string',pavarde);
set(handles.edit7,'string',laipsnis);
set(handles.edit8,'string',pareigos);
set(handles.edit9,'string',telefonas);
set(handles.edit10,'string',marke);
set(handles.edit11,'string',numeris);
set(handles.edit12,'string',tarnyba);
axes(handles.axes4);
nuotrauka = nuotrauka{1};
jimage = javax.imageio.ImageIO.read(java.io.ByteArrayInputStream(typecast(nuotrauka, 'uint8')));
height = jimage.getHeight;
width = jimage.getWidth;
pixels = reshape(typecast(jimage.getData.getDataStorage, 'uint8'), [3,width,height]);
img = cat(3, ...
transpose(reshape(pixels(3,:,:), [width,height])), ...
transpose(reshape(pixels(2,:,:), [width,height])), ...
transpose(reshape(pixels(1,:,:), [width,height])));
imshow(img);
a = ('ENTRY');
b = ('DO NOT ENTRY');
if word == curs.data{1,7}
set(handles.text13,'foregroundcolor','green');
set(handles.text13,'string',a);
else
set(handles.text13,'foregroundcolor','red');
set(handles.text13,'string',b);
end
close(curs);
close(conn);
clear all
  2 个评论
Jan
Jan 2016-12-18
If you get an error message, please post a complete copy of it. It is much easier to understand a problem, if it is known.
Gytis Raudonius
Gytis Raudonius 2016-12-20
Error using subsref Index exceeds matrix dimensions.
Error in cursor/subsref (line 42) [varargout{1:nargout}] = builtin('subsref',A,S);
Error in Pagrindas>pushbutton1_Callback (line 200) numeris = curs.data{1,7};
Error in gui_mainfcn (line 96) feval(varargin{:});
Error in Pagrindas (line 42) gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)Pagrindas('pushbutton1_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating uicontrol Callback

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采纳的回答

Walter Roberson
Walter Roberson 2016-12-26
if isempty(curs.data)
%there was no match...
else
%okay to use the data
end
  11 个评论
显示 9更早的评论
Gytis Raudonius
Gytis Raudonius 2016-12-30
update code
curs = fetch(curs);
if isempty(curs) || ~isstruct(curs) || ~isfield(curs, 'data') || size(curs.data,2) < 7
set(handles.text13,'foregroundcolor','red');
set(handles.text13,'string','DO NOT ENTRY');
else
numeris = curs.data{7};
vardas = curs.data{1};
pavarde = curs.data{2};
laipsnis = curs.data{3};
pareigos = curs.data{4};
telefonas = curs.data{5};
marke = curs.data{6};
tarnyba = curs.data{8};
nuotrauka = curs.data(9);
set(handles.edit5,'string',vardas);
set(handles.edit6,'string',pavarde);
set(handles.edit7,'string',laipsnis);
set(handles.edit8,'string',pareigos);
set(handles.edit9,'string',telefonas);
set(handles.edit10,'string',marke);
set(handles.edit11,'string',numeris);
set(handles.edit12,'string',tarnyba);
axes(handles.axes4);
nuotrauka = nuotrauka{1};
jimage = javax.imageio.ImageIO.read(java.io.ByteArrayInputStream(typecast(nuotrauka, 'uint8')));
height = jimage.getHeight;
width = jimage.getWidth;
pixels = reshape(typecast(jimage.getData.getDataStorage, 'uint8'), [3,width,height]);
img = cat(3, ...
transpose(reshape(pixels(3,:,:), [width,height])), ...
transpose(reshape(pixels(2,:,:), [width,height])), ...
transpose(reshape(pixels(1,:,:), [width,height])));
imshow(img);
set(handles.text13,'foregroundcolor','green');
set(handles.text13,'string','ENTRY');
end
close(curs);
close(conn);
clear all
But have new problem, with this update if car plate not in database it write 'DO NOT ENRTY', but got same and if car plate in database

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更多回答（2 个）

Jan
Jan 2016-12-18
A bold guess:
if word == curs.data{1,7}
Do not compare strings by ==, but with strcmp
if strcmp(word, curs.data{1,7})
  3 个评论
显示 1更早的评论
Jan
Jan 2016-12-26
Please do not let us guess, but post the error message you get. In the shown code you compare "word" with "curs.data{1,7}" twice.
Gytis Raudonius
Gytis Raudonius 2016-12-26
Error while evaluating uicontrol Callback
Error using subsref Index exceeds matrix dimensions.
Error in cursor/subsref (line 42) [varargout{1:nargout}] = builtin('subsref',A,S);
Error in Pagrindas>pushbutton1_Callback (line 200) numeris = curs.data{1,7};
Error in gui_mainfcn (line 96) feval(varargin{:});
Error in Pagrindas (line 42) gui_mainfcn(gui_State, varargin{:});
Error in @(hObject,eventdata)Pagrindas('pushbutton1_Callback',hObject,eventdata,guidata(hObject))
Error while evaluating uicontrol Callback

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Gytis Raudonius
Gytis Raudonius 2016-12-30
solve full code
conn = database('baze', 'root', 'root', 'Vendor', 'MYSQL', 'Server', 'localhost', 'PortNumber', 3306);
setdbprefs('datareturnformat','structure');
word = get(handles.edit4,'String');
if iscell(word) && numel(word) == 1
word = word{1};
end
if ~ischar(word) || isempty(word);
error('A valid string must be supplied!');
end
sqlquery = ['select vardas, pavarde, laipsnis, pareigos, telefonas, marke, numeris, tarnyba, nuotrauka from info '...
'where numeris = ' '''' word ''''];
curs = exec(conn, sqlquery);
setdbprefs('DataReturnFormat','cellarray');
curs = fetch(curs);
set(handles.edit5,'string','');
set(handles.edit6,'string','');
set(handles.edit7,'string','');
set(handles.edit8,'string','');
set(handles.edit9,'string','');
set(handles.edit10,'string','');
set(handles.edit11,'string','');
set(handles.edit12,'string','');
axes(handles.axes4);
imshow(cla);
end
try
numeris = curs.data{7};
vardas = curs.data{1};
pavarde = curs.data{2};
laipsnis = curs.data{3};
pareigos = curs.data{4};
telefonas = curs.data{5};
marke = curs.data{6};
tarnyba = curs.data{8};
nuotrauka = curs.data(9);
set(handles.edit5,'string',vardas);
set(handles.edit6,'string',pavarde);
set(handles.edit7,'string',laipsnis);
set(handles.edit8,'string',pareigos);
set(handles.edit9,'string',telefonas);
set(handles.edit10,'string',marke);
set(handles.edit11,'string',numeris);
set(handles.edit12,'string',tarnyba);
axes(handles.axes4);
nuotrauka = nuotrauka{1};
jimage = javax.imageio.ImageIO.read(java.io.ByteArrayInputStream(typecast(nuotrauka, 'uint8')));
height = jimage.getHeight;
width = jimage.getWidth;
pixels = reshape(typecast(jimage.getData.getDataStorage, 'uint8'), [3,width,height]);
img = cat(3, ...
transpose(reshape(pixels(3,:,:), [width,height])), ...
transpose(reshape(pixels(2,:,:), [width,height])), ...
transpose(reshape(pixels(1,:,:), [width,height])));
imshow(img);
set(handles.text13,'foregroundcolor','green');
set(handles.text13,'string','LEIDŽIAMA');
catch
set(handles.text13,'foregroundcolor','red');
set(handles.text13,'string','DRAUŽIAMA');
end
close(curs);
close(conn);
clear all

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