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  • WPF - Two way binding use a user control...binding to object, not an element!

    - by Scott
    I created an object with a simple property with a default value. I then created a user control that has a text box in it. I set the datacontext of the user control to the object. The text box correctly shows the properties default value but I can't seem to update the property value when the user changes the text box value. I created a simple project to illustrate my code. Thanks for the help!! public partial class UserControl1 : UserControl { public UserControl1() { InitializeComponent(); } private string _titleValue; public string TitleValue { get { return _titleValue; } set { _titleValue = value; textBox1.Text = _titleValue; } } public static readonly DependencyProperty TitleValueProperty = DependencyProperty.Register( "TitleValue", typeof(string), typeof(UserControl1), new FrameworkPropertyMetadata(new PropertyChangedCallback(titleUpdated)) ); //Don't think I should need to do this!!! private static void titleUpdated(DependencyObject d, DependencyPropertyChangedEventArgs e) { ((UserControl1)d).TitleValue = (string)e.NewValue; } } <UserControl x:Class="WpfApplication1.UserControl1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" d:DesignHeight="300" d:DesignWidth="300"> <Grid> <TextBox Height="23" HorizontalAlignment="Left" Margin="94,97,0,0" Name="textBox1" VerticalAlignment="Top" Width="120" Text="{Binding Path=TitleValue, Mode=TwoWay}"/> </Grid> </UserControl> public partial class MainWindow : Window { public MainWindow() { InitializeComponent(); var dummy = new DummyObject("This is my title."); userControl11.DataContext = dummy; } private void button1_Click(object sender, RoutedEventArgs e) { MessageBox.Show("The value is: " + ((DummyObject)userControl11.DataContext).Title); } } <Window x:Class="WpfApplication1.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="MainWindow" Height="350" Width="525" xmlns:my="clr-namespace:WpfApplication1"> <Grid> <my:UserControl1 HorizontalAlignment="Left" Margin="95,44,0,0" x:Name="userControl11" VerticalAlignment="Top" Height="191" Width="293" TitleValue="{Binding Path=Title, Mode=TwoWay}"/> <Button Content="Check Value" Height="23" HorizontalAlignment="Left" Margin="20,12,0,0" Name="button1" VerticalAlignment="Top" Width="75" Click="button1_Click" /> </Grid> </Window>

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  • Java Interfaces/Implementation naming convention

    - by Amir Rachum
    How do you name different classes / interfaces you create? Sometimes I don't have implementation information to add to the implementation name - like interface FileHandler and class SqlFileHandler. hen this happens I usually name the interface in the "normal" name, like Truck and name the actual class TruckClass. How do you name interfaces and classes in this regard?

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  • Execute a jar file using Ant

    - by geetha
    I am trying to create a runnable jar file from java classes using ant. The java classes use external jars. When I execute the build.xml its showing class not found exception while running the java program. Its compiling fine. Part of My source code: <path id="project-libpath"> <fileset dir="${lib.dir}"> <include name="*.jar"/> </fileset> </path> <path id="project-classpath"> <fileset dir="C:/xmldecode/lib"> <include name="*.jar"/> </fileset> </path> <target name="compile" depends="prepare"> <javac srcdir="${src.dir}" destdir="${classes.dir}"> <classpath refid="project-classpath"/> </javac> </target> <target name="jar" depends="compile"> <copy todir="${classes.dir}"> <fileset dir="C:/xmldecode/lib"/> </copy> <pathconvert property="mf.classpath" pathsep=";"> <path refid="project-classpath" /> <flattenmapper /> </pathconvert> <jar destfile="${jar.dir}/${ant.project.name}.jar" basedir="${classes.dir}"> <manifest> <attribute name="Main-Class" value="${main-class}"/> <attribute name="Class-Path" value="${mf.classpath}"/> </manifest> </jar> </target> <target name="run" depends="jar"> <java jar="${jar.dir}/${ant.project.name}.jar" fork="true"> </java>

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  • when does static member gets memory.

    - by vaibhav
    I have a class which have a static member. As I understand all static members are common for all instance of the class. So it means static members would get memory only once. Where is this memory is allocated (Stack or Heap) and when this memory get allocated.

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  • A view model mvvm design issue

    - by Chen Kinnrot
    the best way to explain is with example so: this is the model public class Person { public int age; public string name; } this is the view model public class PersonVM { } my question is: should the vm expose the person to the datga template or encapsulate the model properties with his own properties?

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  • Unexpected tag T_ECHO in inline if

    - by Lombo
    I have something like this in one of my views <li <?php $isCurrent ? echo 'class="current"' : ''?> > <a href="SOME_LINK" class="SOME_CLASS">SOME_TEXT</a> </li> This causes a syntax error, unexpected T_ECHO. Changing echo for print solves the issue, but I would like to understand why I cannot use echo.

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  • PHP: Extending static member arrays

    - by tstenner
    I'm having the following scenario: class A { public static $arr=array(1,2); } class B extends A { public static $arr=array(3,4); } Is there any way to combine these 2 arrays so B::$arr is 1,2,3,4? I don't need to alter these arrays, but I can't declare them als const, as PHP doesn't allow const arrays.http://stackoverflow.com/questions/ask The PHP manual states, that I can only assign strings and constants, so parent::$arr + array(1,2) won't work, but I think it should be possible to do this.

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  • How do i cast an object to a string when object is not a string?

    - by acidzombie24
    I have class A, B, C. They all can implicitly convert to a string public static implicit operator A(string sz_) { ... return sz; } I have code that does this object AClassWhichImplicitlyConvertsToString { ... ((KnownType)(String)AClassWhichImplicitlyConvertsToString).KnownFunc() } The problem is, AClassWhichImplicitlyConvertsToString isnt a string even though it can be typecast into one implicitly. I get a bad cast exception. How do i say its ok as long as the class has an operator to convert into a string?

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  • Unit testing installation of services

    - by skiphoppy
    Our installer program is going to be installing a number of system services, under both Windows and UNIX, using JavaServiceWrapper. There will be a class responsible for creating JavaServiceWrapper config files, installing the services, etc. Can I have some suggestions on how to unit-test this class?

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  • 404 with spring 3

    - by markjason72
    hi I am going through my first lessons with spring 3.I created a dynamic web app in eclipse with the following structure. spring3mvc \src\my.spring.HelloWorldController.java \WebContent | |-----WEB-INF\jsp\hello.jsp |-----index.jsp |-----web.xml |-----WEB-INF\spring-servlet.xml |-----WEB-INF\lib\...*.jar files I created the spring-servlet.xml as below <context:component-scan base-package="my.spring" /> <bean id="viewResolver" class="org.springframework.web.servlet.view.UrlBasedViewResolver"> <property name="viewClass" value="org.springframework.web.servlet.view.JstlView" /> <property name="prefix" value="/WEB-INF/jsp/" /> <property name="suffix" value=".jsp" /> </bean> and coded the controller package my.spring; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; @Controller public class HelloWorldController { @RequestMapping("/hello") public ModelAndView helloWorld() { String message = "Hello World, Spring 3.0!"; return new ModelAndView("hello", "message", message); } } index.jsp has a link to hello view <html> <body> <a href="hello.html">Say Hello</a> </body> </html> finally in hello.jsp I have put <html> <body> ${message} </body> </html> My web.xml has <display-name>Spring3MVC</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>spring</servlet-name> <servlet-class> org.springframework.web.servlet.DispatcherServlet </servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>*.html</url-pattern> </servlet-mapping> When I run the app on Tomcat6 server( thru eclipse),I can see the index page at http://localhost:8080/Spring3MVC/ .It displays the link to hello page.When I click on it(http://localhost:8080/Spring3MVC/hello.html),I get a 404 error. message /Spring3MVC/hello.html description The requested resource (/Spring3MVC/hello.html) is not available. Any idea how I can solve this? thanks mark.

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  • Creating a Type object corresponding to a generic type

    - by Alexey Romanov
    In Java, how can I construct a Type object for Map<String, String>? System.out.println(Map<String, String>.class); doesn't compile. One workaround I can think of is private Map<String, String> dummy() { throw new Error(); } Type mapStringString = Class.forName("ThisClass").getMethod("dummy", null).getGenericReturnType(); Is this the correct way?

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  • Any special assertion to test if the resulting integer lies within a range

    - by barerd
    I would like to test if an instance variable lies in a range of numbers. I solved the problem by using assert_in_delta but would like to know if there is a formal assertion for this. #part of the tested class def initialize(value = 70 + rand(30)) @value = value end #test_value.rb class ValueTestCase < Test::Unit::TestCase def test_if_value_in_range assert_in_delta(85, p.value, 15) end end

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  • How can I convert a C# application that uses StandardInput and StandardOutput in .NET Compact Framew

    - by Chad
    I have an application that uses the Process class, StandardInput, and StandardOutput to communicate with an external executable. I am using this to pass strings back and forth, and it works well in my Windows application. On the mobile device, I do not see StandardInput or StandardOutput in the Process class. Is there an easy way to replicate this functionality on the Mobile?

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  • skip after_filter in controller before_filter

    - by Rafael Carício
    I'm using Intercom rails in my application and I would like to not include intercom script in a certain situation. So, I would like to skip the intercom after_filter when a value is set in the user session. I tried that, but it didn't worked: class ApplicationController < ActionController::Base before_filter :verify_session def verify_session if skip_intercom? self.class.skip_after_filter :intercom_rails_auto_include end end end Any idea if it's possible?

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  • redefineClasses in JVMTI

    I have two questions Does redefineClasses work with JIT enabled JVM? If so, in multithreaded applications, if one thread uses redefineClasses to redefine a class, does another thread see that redefined class? (especially, if the other thread is running jit compiled code?)

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  • PHP: Remove Simple Session with Get-Method

    - by elmaso
    Hello, I want to Remove the Sessions from this php code, actually if someone searches i get this url search.php?searchquery=test but if I reload the page, the results are cleaned. how can I remove the Sessions to get the Results still, if someone reloads the page? this are the codes: search.php <?php session_start(); ?> <form method="get" action="querygoogle.php"> <label for="searchquery"><span class="caption">Search this site</span> <input type="text" size="20" maxlength="255" title="Enter your keywords and click the search button" name="searchquery" /></label> <input type="submit" value="Search" /> </form> <?php if(!empty($_SESSION['googleresults'])) { echo $_SESSION['googleresults']; unset($_SESSION['googleresults']); } ?> querygoogle.php <?php session_start(); $url = 'http://www.example.com'; $handle = fopen($url, 'rb'); $body = ''; while (!feof($handle)) { $body .= fread($handle, 8192); } fclose($handle); $json = json_decode($body); foreach($json->responseData->results as $searchresult) { if($searchresult->GsearchResultClass == 'GwebSearch') { $formattedresults .= ' <div class="searchresult"> <h3><a href="' . $searchresult->unescapedUrl . '">' . $searchresult->titleNoFormatting . '</a></h3> <p class="resultdesc">' . $searchresult->content . '</p> <p class="resulturl">' . $searchresult->visibleUrl . '</p> </div>'; } } $_SESSION['googleresults'] = $formattedresults; header("Location: search.php?searchquery=" . $_GET['searchquery']); exit; ?> thank you for your help!!

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  • How change Castor mapping to remove "xmlns:xsi" and "xsi:type" attributes from element in XML output

    - by Derek Mahar
    How do I change the Castor mapping <?xml version="1.0"?> <!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN" "http://castor.org/mapping.dtd"> <mapping> <class name="java.util.ArrayList" auto-complete="true"> <map-to xml="ArrayList" /> </class> <class name="com.db.spgit.abstrack.ws.response.UserResponse"> <map-to xml="UserResponse" /> <field name="id" type="java.lang.String"> <bind-xml name="id" node="element" /> </field> <field name="deleted" type="boolean"> <bind-xml name="deleted" node="element" /> </field> <field name="name" type="java.lang.String"> <bind-xml name="name" node="element" /> </field> <field name="typeId" type="java.lang.Integer"> <bind-xml name="typeId" node="element" /> </field> <field name="regionId" type="java.lang.Integer"> <bind-xml name="regionId" node="element" /> </field> <field name="regionName" type="java.lang.String"> <bind-xml name="regionName" node="element" /> </field> </class> </mapping> to suppress the xmlns:xsi and xsi:type attributes in the element of the XML output? For example, instead of the output XML <?xml version="1.0" encoding="UTF-8"?> <ArrayList> <UserResponse xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:type="UserResponse"> <name>Tester</name> <typeId>1</typeId> <regionId>2</regionId> <regionName>US</regionName> </UserResponse> </ArrayList> I'd prefer <?xml version="1.0" encoding="UTF-8"?> <ArrayList> <UserResponse> <name>Tester</name> <typeId>1</typeId> <regionId>2</regionId> <regionName>US</regionName> </UserResponse> </ArrayList> such that the element name implies the xsi:type.

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  • Stepping into Ruby Meta-Programming: Generating proxy methods for multiple internal methods

    - by mstksg
    Hi all; I've multiply heard Ruby touted for its super spectacular meta-programming capabilities, and I was wondering if anyone could help me get started with this problem. I have a class that works as an "archive" of sorts, with internal methods that process and output data based on an input. However, the items in the archive in the class itself are represented and processed with integers, for performance purposes. The actual items outside of the archive are known by their string representation, which is simply number_representation.to_s(36). Because of this, I have hooked up each internal method with a "proxy method" that converts the input into the integer form that the archive recognizes, runs the internal method, and converts the output (either a single other item, or a collection of them) back into strings. The naming convention is this: internal methods are represented by _method_name; their corresponding proxy method is represented by method_name, with no leading underscore. For example: class Archive ## PROXY METHODS ## ## input: string representation of id's ## output: string representation of id's def do_something_with id result = _do_something_with id.to_i(36) return nil if result == nil return result.to_s(36) end def do_something_with_pair id_1,id_2 result = _do_something_with_pair id_1.to_i(36), id_2.to_i(36) return nil if result == nil return result.to_s(36) end def do_something_with_these ids result = _do_something_with_these ids.map { |n| n.to_i(36) } return nil if result == nil return result.to_s(36) end def get_many_from id result = _get_many_from id return nil if result == nil # no sparse arrays returned return result.map { |n| n.to_s(36) } end ## INTERNAL METHODS ## ## input: integer representation of id's ## output: integer representation of id's def _do_something_with id # does something with one integer-represented id, # returning an id represented as an integer end def do_something_with_pair id_1,id_2 # does something with two integer-represented id's, # returning an id represented as an integer end def _do_something_with_these ids # does something with multiple integer ids, # returning an id represented as an integer end def _get_many_from id # does something with one integer-represented id, # returns a collection of id's represented as integers end end There are a couple of reasons why I can't just convert them if id.class == String at the beginning of the internal methods: These internal methods are somewhat computationally-intensive recursive functions, and I don't want the overhead of checking multiple times at every step There is no way, without adding an extra parameter, to tell whether or not to re-convert at the end I want to think of this as an exercise in understanding ruby meta-programming Does anyone have any ideas? edit The solution I'd like would preferably be able to take an array of method names @@PROXY_METHODS = [:do_something_with, :do_something_with_pair, :do_something_with_these, :get_many_from] iterate through them, and in each iteration, put out the proxy method. I'm not sure what would be done with the arguments, but is there a way to test for arguments of a method? If not, then simple duck typing/analogous concept would do as well.

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  • RSA Encryption C#

    - by Ryan
    Hi guys, I have a class which in C# doing RSA encryption where I used the default RSACryptoServiceProvider class. But I have a concern regarding the following; If you have the word hello for an input and the encrypted string is returned as ABCDE, if you perform another encrypt operation on the input hello, using the same keys (public and private) for the RSA will the output be again ABCDE? Thanks in advance

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  • NetworkOnMainThreadException while using AsyncTask

    - by Fansher
    Im making an app that uses the internet to retrive information. I get an NetworkOnMainThreadException as i tried to run it on 3.0 and above and have therefore tried to set it up using AsyncTask, but it still gives the exception and i don't know what is wrong. Oddly enough i read on this thread Android NetworkOnMainThreadException inside of AsyncTask that if you just removes the android:targetSdkVersion="10" statement from the manifest file it will be able to run. This works but i don't find it as the right solution to solve the problem this way. So if anyone can tell me what im doing wrong with the AsyncTask i will really appriciate it. Also if there is anybody that knows why removing the statement in the manifest makes it work, im really interested in that also. My code looks like this: public class MainActivity extends Activity { static ArrayList<Tumblr> tumblrs; ListView listView; TextView footer; int offset = 0; ProgressDialog pDialog; View v; String responseBody = null; HttpResponse r; HttpEntity e; String searchUrl; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); final ConnectivityManager conMgr = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); final NetworkInfo activeNetwork = conMgr.getActiveNetworkInfo(); if (activeNetwork != null && activeNetwork.isConnected()) { setContentView(R.layout.main); try { tumblrs = getTumblrs(); listView = (ListView) findViewById(R.id.list); View v = getLayoutInflater().inflate(R.layout.footer_layout, null); footer = (TextView) v.findViewById(R.id.tvFoot); listView.addFooterView(v); listView.setAdapter(new UserItemAdapter(this, R.layout.listitem)); } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (JSONException e) { e.printStackTrace(); } new GetChicks().execute(); footer.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { new loadMoreListView().execute(); } }); } else { setContentView(R.layout.nonet); } } public class UserItemAdapter extends ArrayAdapter<Tumblr> { public UserItemAdapter(Context context, int imageViewResourceId) { super(context, imageViewResourceId, tumblrs); } @Override public View getView(int position, View convertView, ViewGroup parent) { View v = convertView; if (v == null) { LayoutInflater vi = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); v = vi.inflate(R.layout.listitem, null); } Tumblr tumblr = tumblrs.get(position); if (tumblr != null) { ImageView image = (ImageView) v.findViewById(R.id.avatar); if (image != null) { image.setImageBitmap(getBitmap(tumblr.image_url)); } } return v; } } public Bitmap getBitmap(String bitmapUrl) { try { URL url = new URL(bitmapUrl); return BitmapFactory.decodeStream(url.openConnection() .getInputStream()); } catch (Exception ex) { return null; } } public ArrayList<Tumblr> getTumblrs() throws ClientProtocolException, IOException, JSONException { searchUrl = "http://api.tumblr.com/v2/blog/"webside"/posts?api_key=API_KEY"; ArrayList<Tumblr> tumblrs = new ArrayList<Tumblr>(); return tumblrs; } private class GetChicks extends AsyncTask<Void, Void, Void> { @Override protected Void doInBackground(Void... unused) { // TODO Auto-generated method stub runOnUiThread(new Runnable() { public void run() { HttpClient client = new DefaultHttpClient(); HttpGet get = new HttpGet(searchUrl); HttpResponse r = null; try { r = client.execute(get); int status = r.getStatusLine().getStatusCode(); if (status == 200) { e = r.getEntity(); responseBody = EntityUtils.toString(e); } } catch (ClientProtocolException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } JSONObject jsonObject; try { jsonObject = new JSONObject(responseBody); JSONArray posts = jsonObject.getJSONObject("response") .getJSONArray("posts"); for (int i = 0; i < posts.length(); i++) { JSONArray photos = posts.getJSONObject(i) .getJSONArray("photos"); for (int j = 0; j < photos.length(); j++) { JSONObject photo = photos.getJSONObject(j); String url = photo.getJSONArray("alt_sizes") .getJSONObject(0).getString("url"); Tumblr tumblr = new Tumblr(url); tumblrs.add(tumblr); } } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }); return null; } } public class Tumblr { public String image_url; public Tumblr(String url) { this.image_url = url; } } private class loadMoreListView extends AsyncTask<Void, Void, Void> { @Override protected void onPreExecute() { // Showing progress dialog before sending http request pDialog = new ProgressDialog(MainActivity.this); pDialog.setMessage("More chicks coming up.."); pDialog.setIndeterminate(true); pDialog.setCancelable(false); pDialog.show(); } @Override protected Void doInBackground(Void... unused) { // TODO Auto-generated method stub runOnUiThread(new Runnable() { public void run() { // increment current page offset += 2; // Next page request tumblrs.clear(); String searchUrl = "http://api.tumblr.com/v2/blog/"webside"/posts?api_key=API_KEY&limit=2 + offset; HttpClient client = new DefaultHttpClient(); HttpGet get = new HttpGet(searchUrl); HttpResponse r = null; try { r = client.execute(get); int status = r.getStatusLine().getStatusCode(); if (status == 200) { HttpEntity e = r.getEntity(); responseBody = EntityUtils.toString(e); } } catch (ClientProtocolException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } catch (IOException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } JSONObject jsonObject; try { jsonObject = new JSONObject(responseBody); JSONArray posts = jsonObject.getJSONObject("response") .getJSONArray("posts"); for (int i = 0; i < posts.length(); i++) { JSONArray photos = posts.getJSONObject(i) .getJSONArray("photos"); for (int j = 0; j < photos.length(); j++) { JSONObject photo = photos.getJSONObject(j); String url = photo.getJSONArray("alt_sizes") .getJSONObject(0).getString("url"); Tumblr tumblr = new Tumblr(url); tumblrs.add(tumblr); } } } catch (JSONException e) { // TODO Auto-generated catch block e.printStackTrace(); } // Setting new scroll position listView.setSelectionFromTop(0, 0); } }); return null; } protected void onPostExecute(Void unused) { pDialog.dismiss(); } } @Override public boolean onCreateOptionsMenu(android.view.Menu menu) { // TODO Auto-generated method stub super.onCreateOptionsMenu(menu); MenuInflater blowUp = getMenuInflater(); blowUp.inflate(R.menu.cool_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // TODO Auto-generated method stub switch (item.getItemId()) { case R.id.aboutUs: Intent i = new Intent("com.example.example.ABOUT"); startActivity(i); break; case R.id.refresh: Intent f = new Intent(MainActivity.this, MainActivity.class); startActivity(f); finish(); break; case R.id.exit: finish(); break; } return false; } } Thanks for helping out.

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