Generic InvokeRequired pattern - (C# Multi-Threading)

Tody I read article on InokeRequired patterns posted in code project ( Read Full Article )

I have wrote more generic version of the same ( Less code !!!!! ...clear & crisp...)

public static class ControlExtension
{
public static void UpdateControl(this Control control, MethodInvoker code)
{
if (control.InvokeRequired) {
control.Invoke(code);
}
else{
code.Invoke();
}
}

using 'Control' type param in Extension mentod give us an advantage to call UpdateControl on any control.

for eg:- In the below example I have called 'UpdateControl' extension method on textbox control.

private void btnUpdate_Click(object sender, EventArgs e)
{
Thread th = new Thread(new ThreadStart( () => txtInfo.UpdateControl(Display) ) );
th.Start();
}

private void Display()
{
txtInfo.Text += "Updated";
}

Using Web Services with MATLAB

This video explains how to consume Web services in matlab.

Note:- use 'createClassFromWsdl' function to generate matlab equivalent proxy class from wsdl.




Code snippet of Currency converter GUI application that is used for this demo,

file name :- CurrencyConverterGUI.m
------------------------------------

function varargout = CurrencyConverterGUI(varargin)
% CURRENCYCONVERTERGUI M-file for CurrencyConverterGUI.fig
% CURRENCYCONVERTERGUI, by itself, creates a new CURRENCYCONVERTERGUI or raises the existing
% singleton*.
%
% H = CURRENCYCONVERTERGUI returns the handle to a new CURRENCYCONVERTERGUI or the handle to
% the existing singleton*.
%
% CURRENCYCONVERTERGUI('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in CURRENCYCONVERTERGUI.M with the given input arguments.
%
% CURRENCYCONVERTERGUI('Property','Value',...) creates a new CURRENCYCONVERTERGUI or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before CurrencyConverterGUI_OpeningFunction gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to CurrencyConverterGUI_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 CurrencyConverterGUI

% Last Modified by GUIDE v2.5 13-Jun-2009 08:58:28

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @CurrencyConverterGUI_OpeningFcn, ...
'gui_OutputFcn', @CurrencyConverterGUI_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


% --- Executes just before CurrencyConverterGUI is made visible.
function CurrencyConverterGUI_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 CurrencyConverterGUI (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = CurrencyConverterGUI_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;


% --- Executes on selection change in popupmenu1.
function popupmenu1_Callback(hObject, eventdata, handles)
% hObject handle to popupmenu1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns popupmenu1 contents as cell array
% contents{get(hObject,'Value')} returns selected item from popupmenu1


% --- Executes during object creation, after setting all properties.
function popupmenu1_CreateFcn(hObject, eventdata, handles)
% hObject handle to popupmenu1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu 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


% --- Executes on selection change in ToCurrency.
function ToCurrency_Callback(hObject, eventdata, handles)
% hObject handle to ToCurrency (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns ToCurrency contents as cell array
% contents{get(hObject,'Value')} returns selected item from ToCurrency


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

% Hint: popupmenu 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


% --- Executes on selection change in FromCurrency.
function FromCurrency_Callback(hObject, eventdata, handles)
% hObject handle to FromCurrency (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns FromCurrency contents as cell array
% contents{get(hObject,'Value')} returns selected item from FromCurrency


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

% Hint: popupmenu 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



function convertedValue_Callback(hObject, eventdata, handles)
% hObject handle to convertedValue (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 convertedValue as text
% str2double(get(hObject,'String')) returns contents of convertedValue as a double


% --- Executes during object creation, after setting all properties.
function convertedValue_CreateFcn(hObject, eventdata, handles)
% hObject handle to convertedValue (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


% --- Executes on button press in Convert.
function Convert_Callback(hObject, eventdata, handles)
% hObject handle to Convert (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

%instantiate object
service = CurrencyConvertor;

fromCurrency = getSelectedValueFromPopupMenu(handles.FromCurrency);
toCurrency = getSelectedValueFromPopupMenu(handles.ToCurrency);

value = ConversionRate(service, fromCurrency,toCurrency);
set(handles.convertedValue,'String',value);

function [selectedValue] = getSelectedValueFromPopupMenu(handle)
contents = get(handle,'String');
selectedValue = contents{ get(handle,'value') };