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• How to build a simulation of a login hardware token in .Net

  - by Michel

  Hi, i have a hardware token for remote login to some citrix environment. When i click the button on the device, i get an id and i can use that to login to the citrix farm. I can click the button as much as i like, and every time a new code gets generated, and they all work. Now i want to secure my private website likewise, but not with the hardware token, but with a 'token app' on my phone. So i run an app on my phone, generate a key, and use that to (partly) authenticate myself on the server. But here's the point: i don't know how it works! How can i generate 1, 2 or 100 keys at one time which i can see (on the server) are all valid, but without the server and the phone app having contact (the hardware token also is an 'offline' solution). Can you help me with a hint how i would do this? This is what i thought of so far: the phone app and the server app know (hardcoded) the same encryption key. The phone app encrypts the current time. The server app decrypts the string to the current time and if the diff between that time and the actual server time is less than 10 minutes it's an ok. Difficult for other users to fake a key, but encryption gives such nasty strings to enter, and the hardware token gives me nice things like 'H554TU8' And this is probably not how the real hardware token works, because the server and the phone app must 'know' the same encryption key. Michel

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• Spring import runs hibernate persistence twice

  - by Jaanus

  I have 2 spring configurations : spring-servlet.xml spring-security.xml needed to add this line to security: <beans:import resource="spring-servlet.xml"/> Now hibernate is ran twice, this is log screenshot : my web.xml: <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>/</url-pattern> </servlet-mapping> <listener> <listener-class> org.springframework.web.context.ContextLoaderListener </listener-class> </listener> <context-param> <param-name>contextConfigLocation</param-name> <param-value> /WEB-INF/spring-security.xml </param-value> </context-param>

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• Java: Tracking a user login session - Session EJBs vs HTTPSession

  - by bguiz

  If I want to keep track of a conversational state with each client using my web application, which is the better alternative - a Session Bean or a HTTP Session - to use? Using HTTP Session: //request is a variable of the class javax.servlet.http.HttpServletRequest //UserState is a POJO HttpSession session = request.getSession(true); UserState state = (UserState)(session.getAttribute("UserState")); if (state == null) { //create default value .. } String uid = state.getUID(); //now do things with the user id Using Session EJB: In the implementation of ServletContextListener registered as a Web Application Listener in WEB-INF/web.xml: //UserState NOT a POJO this this time, it is //the interface of the UserStateBean Stateful Session EJB @EJB private UserState userStateBean; public void contextInitialized(ServletContextEvent sce) { ServletContext servletContext = sce.getServletContext(); servletContext.setAttribute("UserState", userStateBean); ... In a JSP: public void jspInit() { UserState state = (UserState)(getServletContext().getAttribute("UserState")); ... } Elsewhere in the body of the same JSP: String uid = state.getUID(); //now do things with the user id It seems to me that the they are almost the same, with the main difference being that the UserState instance is being transported in the HttpRequest.HttpSession in the former, and in a ServletContext in the case of the latter. Which of the two methods is more robust, and why?

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• How to "wrap" implementation in C#

  - by igor

  Hello, I have these classes in C# (.NET Framework 3.5) described below: public class Base { public int State {get; set;} public virtual int Method1(){} public virtual string Method2(){} ... public virtual void Method10(){} } public class B: Base { // some implementation } public class Proxy: Base { private B _b; public class Proxy(B b) { _b = b; } public override int Method1() { if (State == Running) return _b.Method1(); else return base.Method1(); } public override string Method2() { if (State == Running) return _b.Method2(); else return base.Method2(); } public override void Method10() { if (State == Running) _b.Method10(); else base.Method10(); } } I want to get something this: public Base GetStateDependentImplementation() { if (State == Running) // may be some other rule return _b; else return base; // compile error } and my Proxy's implementation will be: public class Proxy: Base { ... public override int Method1() { return GetStateDependentImplementation().Method1(); } public override string Method2() { return GetStateDependentImplementation().Method2(); } ... } Of course, I can do this (aggregation of base implementation): public RepeaterOfBase: Base // no any overrides, just inheritance { } public class Proxy: Base { private B _b; private RepeaterOfBase _Base; public class Proxy(B b, RepeaterOfBase aBase) { _b = b; _base = aBase; } } ... public Base GetStateDependentImplementation() { if (State == Running) return _b; else return _Base; } ... But instance of Base class is very huge and I have to avoid to have other additional copy in memory. So I have to simplify my code have to "wrap" implementation have to avoid a code duplication have to avoid aggregation of any additional instance of Base class (duplication) Is it possible to reach these goals?

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• SWT Browser Drag and Drop

  - by scottalas

  I'm trying to use drag-n-drop with an embedded SWT Browser, so that my application can drag hyperlinks from the Browser to another Control. I've been able to set up the destination to receive data from an external browser, but the internal does not seem to participate in the drag-n-drop. Any ideas? I would guess that I need something like a selection listener to track when something is grabbed in the browser, or some way to ask the browser what is currently selected, perhaps using javascript. My current setup of the Browser is simplistic, looking like this: browser = new Browser(top, SWT.NONE); // MOZILLA createDragSource(browser); // below // a selection listener never receives events: browser.addListener(SWT.Selection, new Listener() { @Override public void handleEvent(Event event) { System.out.println("Selection listener event"); } }); ... private void createDragSource(final Browser browser) { Transfer[] types = new Transfer[] { URLTransfer.getInstance(), HTMLTransfer.getInstance(), TextTransfer.getInstance(), ImageTransfer.getInstance(), }; int mode = DND.DROP_COPY | DND.DROP_LINK | DND.DROP_MOVE; DragSource dragSource = new DragSource(browser, mode); dragSource.setTransfer(types); dragSource.addDragListener(new DragSourceListener() { public void dragStart(DragSourceEvent event) { System.out.println("source.dragStart"); } public void dragSetData(DragSourceEvent event) { System.out.println("source.dragSetData"); // Is there a way to get the Browser's drag item here? } public void dragFinished(DragSourceEvent event) { System.out.println("source.dragFinished"); //do nothing } }); } Thanks for any help!

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• Android: How to periodically check current location without draining the battery

  - by uyahalom

  I have a background service which works periodically by timer.scheduleAtFixedRate. It wakes up every amount of time (let's say 60 seconds for example) and checks for the location. The location is checked by locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 60000, 5, listener); and the actual location is collected from the listener's onLocationChanged. Now, when the phone is outside and GPS reception is good, this works fine. But, if the phone is inside, the GPS is almost always active - looking for a signal, and the battery is drained rapidly. I created another thread using a Handler and a Runnable in order to conrol the GPS active time accurately: I used locManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, listener); and locManager.removeUpdates(listener); so I can open and close the GPS as I want. In this case, I can open the GPS for the exact amount of time, but found out that it doesn't lock in an area with good reception even after 10 seconds. So here I'm draining the battery again... I'm using API level 7, hence I cannot use locationManager.requestSingleUpdate. I have two questions: Is there any way to optimize this process? Will upgrading to API level 9 (and use locationManager.requestSingleUpdate) improve the process significantly? I mean, does it worth upgrading?

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• What's the *right* way to handle a POST in FP?

  - by Malvolio

  I'm just getting started with FP and I'm using Scala, which may not be the best way, since I can always fall back to an imperative style if the going gets tough. I'd just rather not. I've got a very specific question that points to a broader lacuna in my understanding of FP. When a web application is processing a GET request, the user wants information that already exists on the web-site. The application only has to process and format the data in some way. The FB way is clear. When a web application is processing a POST request, the user wants change the information held on the site. True, the information is not typically held in application variables, it's in a database or a flat-file, but still, I get the feeling I'm not grokking FP properly. Is there a pattern for handling updates to static data in an FP language? My vague picture of this is that the application is handed the request and the then-current site state. The application does its thing and returns the new site-state. If the current site-state hasn't changed since the application started, the new state becomes the current state and the reply is sent back to the browser (this is my dim image of Clojure's style); if the current state has been changed (by another thread, well, something else happens ...

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• What is the best way to get a reference to a spring bean in the backend layers?

  - by java_pill

  I have two spring config files and I'm specifying them in my web.xml as in below. web.xml snippet .. <context-param> <param-name>contextConfigLocation</param-name> <param-value>WEB-INF/classes/domain-context.xml WEB-INF/classes/client-ws.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> .. From my domain object I have to invoke a Web Service Client and in order to get a reference to the Web Service client I do this: ApplicationContext context = new ClassPathXmlApplicationContext("client-ws.xml"); //b'cos I don't want to use WebApplicationContextUtils ProductServiceClient client = (ProductServiceClient) context.getBean("productClient"); .. client.find(prodID); //calls a Web Service .. However, I have concerns that looking up the client-ws.xml file and getting a reference to the ProductServiceClient bean is not efficient. I thought of getting it using WebApplicationContextUtils. However, I don't want my domain objects to have a dependency on the ServletContext (a web/control layer object) because WebApplicationContextUtils depends on ServletContext. What is the best way to get a reference to a spring bean in the backend layers? Thanks!

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• database table design

  - by e.b.white

  I design the tables as below for the system which looks like a package delivering system For example, after user received the package, postman should record in system, and the state(history table) is "delivered",and operator is this postman, the current state(state table) is of course "delivered" history table: +---------------+--------------------------+ | Field | Desc | +---------------+--------------------------+ | id | PRIMARY KEY | +---------------+--------------------------+ | package_id | package_tacking_id | +---------------+--------------------------+ | state | package_state | +---------------+--------------------------+ | operators | operators | +---------------+--------------------------+ | create_time| create_time | +---------------+--------------------------+ state table: +---------------+--------------------------+ | Field | Desc | +---------------+--------------------------+ | id | PRIMARY KEY | +---------------+--------------------------+ | package_id | package_tacking_id | +---------------+--------------------------+ | state | latest_package_state | +---------------+--------------------------+ Above is just the basic information to record, some other information( like invoice, destination,...) should be recored as well. But there are different service types like s1 and s2, for s1 it is not needed to record invoice but s1 need, and maybe s1 need some other information to record (like the tel of end user). After all, at delivering way stations there are additional information to record, and for different service type the information type is different. My question is: 1. For different service type, shall I need to declare different tables(option A) or just one big table which can record all information for all types(option B)? 2. If option A, since the basic information above is MUST, how can prevent from declaring there duplicate fields in different tables?

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• What is the common way to program action listeners?

  - by Roman

  I just started to learn how to use action listeners. To my understanding it works in the following way: There are some classes which contains "addActionListener" method by default (for example classes for buttons). Using this method we add an action listener to an object. For example: listenedObject.addActionListener(listeningObject). When an action with the "listenedObject" is performed, the "actionPerformed" method of the "listeningObject" will be called. So, it means that when we program a class for the listeningObject, we need to put there "actionPerformed" method. What is not clear to me, should we create a new class for every object that we want to listen. It does not seem to me as an elegant solution. On the other hand, if we have one action listener class for all (or at least many) object, than we have a problem since a instance of this class will not know which object is calling the "actionPerformed" method (and we need to know that since actions performed by the actionPerformed differs depending on who is called for this method). In my opinion, for every listened object we need to create are "personal" action listener and we can do it by setting a specific value to the corresponding field of the action listener. But I am not sure that it is a standard way to go? How do usually people do it?

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• naming a function that exhibits "set if not equal" behavior

  - by Chris Sears

  This might be an odd question, but I'm looking for a word to use in a function name. I'm normally good at coming up with succinct, meaningful function names, but this one has me stumped so I thought I'd appeal for help. The function will take some desired state as an argument and compare it to the current state. If no change is needed, the function will exit normally without doing anything. Otherwise, the function will take some action to achieve the desired state. For example, if wanted to make sure the front door was closed, i might say: my_house.<something>_front_door('closed') What word or term should use in place of the something? I'd like it to be short, readable, and minimize the astonishment factor. A couple clarifying points... I would want someone calling the function to intuitively know they didn't need to wrap the function an 'if' that checks the current state. For example, this would be bad: if my_house.front_door_is_open(): my_house.<something>_front_door('closed') Also, they should know that the function won't throw an exception if the desired state matches the current state. So this should never happen: try: my_house.<something>_front_door('closed') except DoorWasAlreadyClosedException: pass Here are some options I've considered: my_house.set_front_door('closed') my_house.setne_front_door('closed') # ne=not equal, from the setne x86 instruction my_house.ensure_front_door('closed') my_house.configure_front_door('closed') my_house.update_front_door('closed') my_house.make_front_door('closed') my_house.remediate_front_door('closed') And I'm open to other forms, but most I've thought of don't improve readability. Such as... my_house.ensure_front_door_is('closed') my_house.conditionally_update_front_door('closed') my_house.change_front_door_if_needed('closed') Thanks for any input!

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• Flash Builder 4 "includeIn" property causing design view error

  - by Chris

  I am creating a custom TextInput component that will define an "error" state. I have extended the TextInput class to change the state to "error" if the errorString property's length is greater than 0. In the skin class, I have defined an "error" state, and added some logic to detect the size and position of the error icon. However, if I have this code at the same time I use the "includeIn" property in the bitmap image tag, I get a design view error. If I either A) Only include that code with no "includeIn" property set, it works or B) dont include the code to set the icon size and position and only use the "includeIn" property, it works. Any ideas what could be causing the design view problem when I use both the "includeIn" property and the icon size/position code at the same time? TextInput Class: package classes { import spark.components.TextInput; public class TextInput extends spark.components.TextInput { [SkinState("error")]; public function TextInput() { super(); } override public function set errorString( value:String ):void { super.errorString = value; invalidateSkinState(); } override protected function getCurrentSkinState():String { if (errorString.length>0) { return "error"; } return super.getCurrentSkinState(); } } } TextInput Skin File: override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void { //THIS IS THE CODE THAT SEEMS TO BE CAUSING THE PROBLEM if(getStyle("iconSize") == "large") { errorIcon.right = -12; errorIcon.source = new errorIconLg(); } else { errorIcon.right = -5; errorIcon.source = new errorIconSm(); } super.updateDisplayList(unscaledWidth, unscaledHeight); } </fx:Script> <s:states> <s:State name="normal"/> <s:State name="disabled"/> <s:State name="error"/> </s:states> //If I remove the problem code above or if I take out the includeIn //property here, it works <s:BitmapImage id="errorIcon" verticalCenter="0" includeIn="error" /> </s:SparkSkin>

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• Creating 3rd party library in Android. Need suggestions!!

  - by Lalith

  Hello all, I am planning to create a 3rd party library for android application developers. Also the main concern is I do not want the users to make many changes to their code base. The following are the main things I want to clarify before diving into the project. 1) I want to attach my own event handlers dynamically to the application. As per above limitations I mentioned, I cannot make users put the relevant code in their handlers as I need to support existing applications as well. I found out that we cannot attach more than one event handler per one listener. For example Button.setOnclickListener(somelistener) .. will set one listener. In traditional desktop applications we can add more than one handlers but here if I do one more Button.setOnclickListener(someOtherListener) this one overwrites the previous listener. Is there any way I can attach my own listener along with application's existing listeners dynamically? Also is it really not supported on android yet? 2) Is there any 3rd party alternative that exists already that monitors user's interactions in androidi? 3) If this is not supported now are there any future plans to support this feature? Please let me know about this as I did not get much feedback on Stackoverflow. Any suggestions and workarounds would really help me continue with this project. Regards, Lalith

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• jquery-ui drag and drop - how to dropped items?

  - by user246114

  Hi, I'm trying to use jquery-ui. I am using one of the drag and drop examples which is pretty much exactly what I need, except instead of moving items between the two lists, I'd like the items to be cloned: http://jqueryui.com/demos/sortable/#connect-lists $(function() { $("#sortable1, #sortable2").sortable({ connectWith: '.connectedSortable' }).disableSelection(); }); <ul id="sortable1" class="connectedSortable"> <li class="ui-state-default">Item 1</li> <li class="ui-state-default">Item 2</li> <li class="ui-state-default">Item 3</li> </ul> <ul id="sortable2" class="connectedSortable"> <li class="ui-state-default">Item 1</li> <li class="ui-state-default">Item 2</li> <li class="ui-state-default">Item 3</li> </ul> so moving an item from the first list to the second list results in list 1 have 2 items, and list 2 having 4 items. I just want it to make clones of the items on the drop. So in the above example, list 1 would still have 3 items, but list 2 would have 4 items, Thank you

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• The Importance of a Security Assessment - by Michael Terra, Oracle

  - by Darin Pendergraft

  Today's Blog was written by Michael Terra, who was the Subject Matter Expert for the recently announced Oracle Online Security Assessment. You can take the Online Assessment here: Take the Online Assessment Over the past decade, IT Security has become a recognized and respected Business discipline.  Several factors have contributed to IT Security becoming a core business and organizational enabler including, but not limited to, increased external threats and increased regulatory pressure. Security is also viewed as a key enabler for strategic corporate activities such as mergers and acquisitions.Now, the challenge for senior security professionals is to develop an ongoing dialogue within their organizations about the importance of information security and how it can impact their organization's strategic objectives/mission. The importance of conducting regular “Security Assessments” across the IT and physical infrastructure has become increasingly important. Security standards and frameworks, such as the international standard ISO 27001, are increasingly being adopted by organizations and their business partners as proof of their security posture and “Security Assessments” are a great way to ensure a continued alignment to these frameworks.Oracle offers a number of different security assessment covering a broad range of technologies. Some of these are short engagements conducted for free with our strategic customers and partners. Others are longer term paid engagements delivered by Oracle Consulting Services or one of our partners. The goal of a security assessment, (also known as a security audit or security review), is to ensure that necessary security controls are integrated into the design and implementation of a project, application or technology.  A properly completed security assessment should provide documentation outlining any security gaps that exist in an infrastructure and the associated risks for those gaps. With that knowledge, an organization can choose to either mitigate, transfer, avoid or accept the risk. One example of an Oracle offering is a Security Readiness Assessment:The Oracle Security Readiness Assessment is a practical security architecture review focused on aligning an organization’s enterprise security architecture to their business principals and strategic objectives. The service will establish a multi-phase security architecture roadmap focused on supporting new and existing business initiatives.Offering OverviewThe Security Readiness Assessment will: Define an organization’s current security posture and provide a roadmap to a desired future state architecture by mapping  security solutions to business goals Incorporate commonly accepted security architecture concepts to streamline an organization’s security vision from strategy to implementation Define the people, process and technology implications of the desired future state architecture The objective is to deliver cohesive, best practice security architectures spanning multiple domains that are unique and specific to the context of your organization. Offering DetailsThe Oracle Security Readiness Assessment is a multi-stage process with a dedicated Oracle Security team supporting your organization.  During the course of this free engagement, the team will focus on the following: Review your current business operating model and supporting IT security structures and processes Partner with your organization to establish a future state security architecture leveraging Oracle’s reference architectures, capability maps, and best practices Provide guidance and recommendations on governance practices for the rollout and adoption of your future state security architecture Create an initial business case for the adoption of the future state security architecture If you are interested in finding out more, ask your Sales Consultant or Account Manager for details.

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• Silverlight Cream for March 22, 2010 -- #817

  - by Dave Campbell

  In this Issue: Bart Czernicki, Tim Greenfield, Andrea Boschin(-2-), AfricanGeek, Fredrik Normén, Ian Griffiths, Christian Schormann, Pete Brown, Jeff Handley, Brad Abrams, and Tim Heuer. Shoutout: At the beginning of MIX10, Brad Abrams reported Silverlight 4 and RIA Services Release Candidate Available NOW From SilverlightCream.com: Using the Bing Maps Silverlight control on the Windows Phone 7 Bart Czernicki has a very cool BingMaps and WP7 tutorial up... you're going to want to bookmark this one for sure! Code included and external links... thanks Bart! Silverlight Rx DataClient within MVVM Tim Greenfield has a great post up about Rx and MVVM with Silverlight 3. Lots of good insight into Rx and interesting code bits. SilverVNC - a VNC Viewer with Silverlight 4.0 RC Andrea Boschin digs into Silverlight 4 RC and it's full-trust on sockets and builds an implementation of RFB protocol... give it a try and give Andrea some feedback. Chromeless Window for OOB applications in Silverlight 4.0 RC Andrea Boschin also has a post up on investigating the OOB no-chrome features in SL4RC. Windows Phone 7 and WCF AfricanGeek has his latest video tutorial up and it's on WCF and WP7... I've got a feeling we're all going to have to get our arms around this. Some steps for moving WCF RIA Services Preveiw to the RC version Fredrik Normén details his steps in transitioning to the RC version of RIA Services. Silverlight Business Apps: Module 8.5 - The Value of MEF with Silverlight Ian Griffiths has a video tutorial up at Channel 9 on MEF and Silverlight, posted by John Papa Introducing Blend 4 – For Silverlight, WPF and Windows Phone Christian Schormann has an early MIX10 post up about te new features in Expression Blend with regard to Silverlight, WPF, and WP7. Building your first Silverlight for Windows Phone Application Pete Brown has his first post up on building a WP7 app with the MIX10 bits. Lookups in DataGrid and DataForm with RIA Services Jeff Handley elaborates on a post by someone else about using lookup data in the DataGrid and DataForm with RIA Services Silverlight 4 + RIA Services - Ready for Business: Starting a New Project with the Business Application Template Brad Abrams is starting a series highlighting the key features of Silverlight 4 and RIA with the new releases. He has a post up Silverlight 4 + RIA Services - Ready for Business: Index, including links and source. Then in this first post of the series, he introduces the Business Application Template. Custom Window Chrome and Events Watch a tutorial video by Tim Heuer on creating custom chrome for OOB apps. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for March 27, 2010 -- #822

  - by Dave Campbell

  In this Issue: MSDN, Bill Reiss, Charlie Kindel(-2-), SilverLaw, Scott Marlowe, Kenny Young, Andrea Boschin, Mike Taulty, Damon Payne, and Jeff Handley(-2-). Shoutouts: Scott Morrison has his material up for his talk at MIX 10: Silverlight 4 Business Applications Matthias Shapiro posted his MIX10 “Information Visualization in Silverlight” Slides and Code for MIX10 Information Visualization Talk Demos Dan Wahlin has his MIX10 material all posted as well: Syncing Audio, Video and Animations in Silverlight Timmy Kokke has an interesting MEF post up: Building extensions for Expression Blend 4 using MEF From SilverlightCream.com: How to: Add an Application Bar to Your Application In case you missed this MSDN post on adding an Application Bar to your WP7 app Simulating accelerometer data in the Windows Phone 7 emulator Got a Wii? How about a Wii remote? Bill Reiss shows how to use the Wii remote to simulate accelerometer data on the WP7 emulator ... really! Windows Phone 7 Series Icon Pack Charlie Kindel announced the release of a WP7 Icon pack ... great external MSDN link on using them as well. Windows Phone Developer Documentation Charlie Kindel also posted WP7 Documentation, and a quick overview of what you'll find ... samples, references, all good stuff to check out and download. GlossyTextblock Custom Control - Silverlight 3 SilverLaw has his GlossyTextblock rebuilt as a Custom Control and in the Expresseion Gallery. Check the blog for a screenshot. A Windows Phone 7 Silverlight TagList Scott Marlowe has a great post up for WP7 accessing his blog tag list via WCF and displaying the data on the emulator... wow! Dynamic Layout and Transitions in Expression Blend 4 Kenny Young has a great companion blog post to a demo app on Expression Gallery. There's also a link on the page to Kenny's MIX10 session Using XmlDefinition and XmlPrefix to better organize namespaces Andrea Boschin comes to our rescue about the maze of namespaces in XAML by using a solution from the RC: XmlDefinition and XmlPrefix Silverlight 4 RC – Socket Security Changes Mike Taulty is discussing changes in the RC with regard to sockets that have come about since he did his series of posts. Lots of good code. Cascading ItemsSource Bindings in Silverlight Damon Payne addresses an issue he came acros with multiple DataGrids on the same screen. He demonstrates the problem, and then demonstrates his solution. ContosoSales Application for RIA Services RC Jeff Handley posted about the refresh to the ContosoSales application shown in the PDC keynote, and details the changes. Lots of good code and links. DomainDataSource Filters and Parameters Jeff Handley has another post up about RIA Services and the fact that ControlParameter is gone... and he shows how to use ElementName binding instead. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for January 03, 2011 -- #1021

  - by Dave Campbell

  In this all-Submittal Issue: Gill Cleeren(-2-), Brian Noyes, Brian Genisio, René Schulte, and Andy Schwam(-2-). Above the Fold: Silverlight: "The INavigationContentLoader interface in Silverlight 4" Gill Cleeren WP7: "Sending Windows Phone Screenshots in an Email" René Schulte WCF RIA Services: "WCF RIA Services Part 10 - Exposing Domain Services To Other Clients" Brian Noyes Shoutouts: Want to know what it takes to be an MVP? Check out René Schulte's recap of 2010: Goodbye 2010 - Hello 2011 ... awesome, René! Rui Marinho sent me this post... it's WPF, but wow... WPF and Kinect! Kinect & WPF From SilverlightCream.com: The INavigationContentLoader interface in Silverlight 4 Gill Cleeren has a couple posts up... this first is a break-out of the INavigationContentLoader... what all can be done with it, in addition to the flow of the page load process broken out. Working with the RaiseCanExecuteChanged in MVVM Light (Silverlight) Gill Cleeren' latest post is a discussion of the Silverlight ICommand interface and Laurent Bugnion's RaiseCanExecuteChanged in MVVM Light, with example code. WCF RIA Services Part 10 - Exposing Domain Services To Other Clients Brian Noyes has Part 10 in his WCF RIA Services Tutorial series up at SilverlightShow ... with info on, for example, exposint an OData, SOAP, or REST/JSON endpoint, or how to consume them. Cross-Training in Silverlight & Flex–MVVM vs Presentation Model Brian Genisio finished the year off with this post in his on-going Silverlight/Flex seris comparing MVVM vs Presentation Model .. lots of good MVVM/ViewModel tips and code in this post. Sending Windows Phone Screenshots in an Email René Schulte is the perfect guy to be doing this... how about emailing a screenshot directly from inside an app, for instance Laurent's taking a screenshot from inside an app... too cool, Rene! Windows Phone 7 Application Development Tips Andy Schwam has a post up with tips he learned while creating his first WP7 app... lots of good tips, Gestures, Camera, ISO... check it out, could save you some time and tears :) WP7 Tip: Using the CameraCaptureTask for Windows Phone 7 Andy Schwam's most recent post is WP7 dev as well, and has a bunch of tips and code for using the camera, such as capturing an image, resizing, saving... good stuff. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for May 17, 2010 -- #863

  - by Dave Campbell

  In this Issue: Christian Schormann, Vladimir Bodurov, Pete Brown, Justin Angel, John Papa(-2-), Fons Sonnemans, Miroslav Miroslavov, and Jeremy Likness. Shoutouts: Jeff Brand has been doing WP7 presentations and posted Windows Phone 7 Presentation and Sample Code Mark Tucker posted about his Windows Phone 7 Presentation at Desert Code Camp 2010 John Allwright discusses 4 New case Studies on Silverlight at the Winter Olympics From SilverlightCream.com: New Video by Jon Harris: Blend 4 for Windows Phone in 90 Seconds Christian Schormann is discussing a second 90-second Expression Blend video tutorial by Jon Harris... this second one is about Blend 4 for WP7. XmlCodeEditor – Silverlight 4 control for editing XML and HTML on the browser Vladimir Bodurov has a post up extending the RichTextBox control to add coloring for HTML and XAML ... it colors as you type, and he plans on adding Intellisense! Creating a Simple Report Writer in Silverlight 4 While working on his book, Pete Brown decided to share some Silverlight 'Report Writer' work with us... check out that list of goals near the top that are all met... looks great to me! Windows Phone 7 - Unlocked ROMs Justin Angel has a good long post about a subject I've stayed away from until now that someone of Justin's level of knowledge has approached it: WP7 ROMs. Silverlight 4 Tools for Visual Studio 2010 Launch: New Designer Capabilities (Silverlight TV 27) John Papa has Silverlight TV 27 up today and is talking about the Silverlight 4 Tools for VS2010 launch with Mark Wilson-Thomas ... the video would be a great place to pick up some of the new features (hint, hint) WCF RIA Services v1.0 Launch! (Silverlight TV 28) John Papa also has Silverlight TV 28 up, talking with Nikhil Kothari and Dinesh Kulkarni about the v 1.0 release of WCF RIA Services. RightMouseTrigger Fons Sonnemans updated his MineSweeper game and has it posted at Silver Arcade, this version supports right mouse click via RightMouseTrigger code that he is sharing. Smoke effect The 'Smoke Effect' menus at the CompleteIT site are awesome, and this time out, Miroslav Miroslavov discusses how that was done and gives up the code...! WebClient and DeploymentCatalog gotchas in Silverlight OOB Jeremy Likness has a post up to give you some relief if you hit the same MEF/Silverlight gotcha he did when running OOB... like not running in OOB for instance. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for November 20, 2011 - 2 -- #1170

  - by Dave Campbell

  In this Issue: Michael Washington, Oliver Fuh, Jeremy Likness, Derik Whittaker, Jesse Liberty, Jeff Blankenburg(-2-), and Michael Crump. Above the Fold: Silverlight: "Handling Extremely Large Data Sets in Silverlight" Jeremy Likness WP7: "31 Days of Mango | Day #8: Contacts API" Jeff Blankenburg LightSwitch: "LightSwitch Chat Application Using A Data Source Extension" Michael Washington Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up Check out Shawn Wildermuth's take on the AppStore and WP7 in general: 40,000 Apps - What Does It Mean? Be sure to check out Jesse Liberty & Paul Betts new book: Programming Reactive Extensions and LINQ, I've just had a little time to look at mine, but don't let the size fool you... this is the good stuff! From SilverlightCream.com: LightSwitch Chat Application Using A Data Source Extension In his latest LightSwitch post, Michael Washington gives up code that will enable two people using the same LightSwitch app to chat. Great detailed tutorial as usual! Handling AdControl Fetching Exception WindowsPhoneGeek turns the blog reigns over to Oliver Fuh for this post about using the AdControl in your WP7 app and handling a common exception you get with the Microsoft AdControl Handling Extremely Large Data Sets in Silverlight In this excerpt from his book, Jeremy Likness discusses reading *LARGE* data sets with Silverlight using 3 different patterns: OData, WCF RIA Services, and MVVM. Using MVVM with the AutoCompleteTextBox in Silverlight 4 Derik Whittaker takes a break from WinRT to discuss the Silverlight 4 AutoCompleteTextBox and MVVM ... including a custom Behavior to allow the backing property to be updated and a command to trigger background searches Yet Another Podcast #52–Peter Torr on Windows Phone Multitasking Jesse Liberty scored Peter Torr on his Latest Yet Another Podcast .. talking about Multitasking on Windows Phone including background agents, the backstack, and other Mango features 31 Days of Mango | Day #8: Contacts API Jeff Blankenburg's Day 8 is about a new namespace on WP7: Microsoft.Phone.UserData ... now giving us the ability to treat the user's contact list like a local database 31 Days of Mango | Day #9: Calendar API On Day 9 in his series, Jeff Blankenburg revisits the Microsoft.Phone.UserData namespace and looks at another set of data: the calendar Want to Decompile Silverlight XAP files? Try JustDecompile Beta! Michael Crump has a post up about the new free developer productivity tool from Telerik that provides assembly browsing and decompiling: JustDecompile ... Just download it! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for June 15, 2010 -- #882

  - by Dave Campbell

  In this Issue: Colin Eberhardt Zoltan Arvai, Marcel du Preez, Mark Tucker, John Papa, Phil Middlemiss, Andy Beaulieu, and Chad Campbell. From SilverlightCream.com: Throttling Silverlight Mouse Events to Keep the UI Responsive Colin Eberhardt sent me this link to his latest at Scott Logic... about how to throttle Silverlight -- no not that, you'd have to go to one of the *other* blogs for that :) ... this is throttling the mouse, particularly the mouse wheel to keep the UI from freezing up ... check out the demos, you'll want to read the code Data Driven Applications with MVVM Part I: The Basics Zoltan Arvai started a series of tutorials on Data-Driven Applications with MVVM at SilverlightShow... this is number 1, and it looks like it's going to be a good series to read. Red-To-Green scale using an IValueConverter Marcel du Preez has an interesting post up at SilverlightShow using an IValueConverter to do a red/yellow/green progress bar ... this is pretty cool. Infragistics XamWebOutlookBar & Caliburn With assistance from Rob Eisenburg, Mark Tucker was able to build a Caliburn sample including the Infragistics XamWebOutlookBar, and he's sharing his experience (and code) with all of us. Printing Tip – Handling User Initiated Dialogs Exceptions John Papa responded to a common printing problem by writing it up in his blog. Note this problem quite often appears during debug, so check it out... John also has a quick tip on an update to the PrintAPI in Silverlight 4. Automatic Rectangle Radius X and Y Phil Middlemiss has another great Blend post up -- this one on rounding off buttons... they look great to me, but he's looking for advice -- how about that Phil? They look great to me :) WP7 Back Button in Games Planning on selling 'stuff' in the Windows Phone Marketplace? Are you familiar with the required use of the Back Button? How about in a game? ... Andy Beaulieu discusses all this and has some code you'll want to use. Windows Phone 7 – Call Phone Number from HyperlinkButton Chad Campbell [no relation :) ] is discussing dialing a number from a hyperlink in WP7 - oh yeah, it's a phone as well :) -- I think I've only seen a number attempt to be called -- hmm... and we're not yet either because we all have emulators, but this is a good intro to the functionality for when we may actually have devices! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for May 05, 2010 -- #856

  - by Dave Campbell

  In this Issue: Jeremy Alles(-2-), Kunal Chowdhury, anand iyer, Yochay Kiriaty(-2-, -3-), Max Paulousky, David Kelley, smartyP, Tim Heuer, and Dan Wahlin. Shoutout: Tim Heuer provides links for all the Ways to give feedback on Silverlight From SilverlightCream.com: [WP7] Bug when using NavigationService in Windows Phone 7 Jeremy Alles has blogged about a bug he found using the Navigation service in WP7. He gives the steps to reproduce and a couple possible workarounds. [WP7] Using the camera in the emulator Jeremy Alles is also digging into the camera functionality in the emulator. He has code demonstrating launching a camera task, and a list of other tasks available. Silverlight Tutorials Chapter 3: Introduction to Panels Kunal Chowdhury has Chapter 3 of his Silverlight 4 Tutorial series up and he's talking about Panels this time out. Push Notifications in Windows Phone 7 developer tools CTP April Refresh anand iyer is discussing the Push Notifications, only from a code perspective. Good information and good additional links to follow. Windows Phone Application Life Cycle Yochay Kiriaty talks with Tudor Toma and Jaime Rodriguez about the WP7 application lifecycle on Channel 9. Understanding Microsoft Push Notifications for Windows Phones Yochay Kiriaty has a 2-part post up on WP7 Push Notifications. The first part is explaining what Push Notifications are and why we need them... as a developer and as an end user viewing Toast or Tile notifications. Understanding How Microsoft Push Notification Works – Part 2 In the 2nd part of his Push Notification series, Yochay Kiriaty discusses how the Push Notification works under the covers. To Remember: Deployment of Silverlight Applications With Wcf Ria Services Max Paulousky has a post up for reference on what to look into when you get "Load Operation Failed" in WCF RIA services. Launching a URL from an OOB Silverlight Application David Kelley has a quick post up on launching URLs from an OOB app. If you haven't tried it, you may be surprised as he was at first. Creating a Windows Phone 7 XNA Game in Landscape Orientation smartyP is looking at recreating a landscape WP7 game in XNA and is detailing some of the issues he's been dealing with, and is also sharing a project file. New Silverlight 4 Themes available–get the raw bits Tim Heuer provided 'raw' versions of 3 new themes. Read his post to see exactly what he means by 'raw' ... they're definitely good looking, and are going to get a lot of play. Handling WCF Service Paths in Silverlight 4 – Relative Path Support Dan Wahlin shares his technique for avoiding the pain involved with ServiceReferences.ClientConfig by using Silverlight 4 relative path support. Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Silverlight Cream for November 08, 2011 -- #1165

  - by Dave Campbell

  In this Issue: Brian Noyes, Michael Crump, WindowsPhoneGeek, Erno de Weerd, Jesse Liberty, Derik Whittaker, Sumit Dutta, Asim Sajjad, Dhananjay Kumar, Kunal Chowdhury, and Beth Massi. Above the Fold: Silverlight: "Working with Prism 4 Part 1: Getting Started" Brian Noyes WP7: "Getting Started with the Coding4Fun toolkit Tile Control" WindowsPhoneGeek LightSwitch: "How to Connect to and Diagram your SQL Express Database in Visual Studio LightSwitch" Beth Massi Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up From SilverlightCream.com: Working with Prism 4 Part 1: Getting Started Brian Noyes has a series starting at SilverlightShow about Prism 4 ... this is the first one, so a good time to jump in and pick up on an intro and basic info about Prism plus building your first Prism app. 10 Laps around Silverlight 5 (Part 5 of 10) Michael Crump has Part 5 of his 10-part Silverlight 5 investigation up at SilverlightShow talking about all the various text features added in Silverlight 5 Beta: Text Tracking and Leading, Linked and MultiColumn, OpenType, etc. Getting Started with the Coding4Fun toolkit Tile Control WindowsPhoneGeek takes on the Tile control from the Coding4Fun toolkit... as usual, great tutorial... diagrams, code, explanation Using AppHarbor, Bitbucket and Mercurial with ASP.NET and Silverlight – Part 2 CouchDB, Cloudant and Hammock Erno de Weerd has Part 2 of his trilogy and he's trying to beat David Anson for the long title record :) ... in this episode, he's adding in cloud storage to the mix in a 35-step tutorial. Background Audio Jesse Liberty's talking about background Audio... and no not the Muzak in the elevator (do they still have that?) ... he's tlking about the WP7.1 BackgroundAudioPlayer Using the ToggleSwitch in WinRT/Metro (for C#) Derik Whittaker shows off the ToggleSwitch for WinRT/Metro... not a lot to be said about it, but he says it all :) Part 19 - Windows Phone 7 - Access Phone Contacts Sumit Dutta has Part 19! of his WP7 series up... talking today about getting a phone number from the directory using the PhoneNumberChooserTask ContextMenu using MVVM Asim Sajjad shows how to make the Context Menu ViewModel friendly in this short tutorial. Code to make call in Windows Phone 7 Dhananjay Kumar's latest WP7 post is explaining how to make a call programmatically using the PhoneCallTask launcher. Silverlight Page Navigation Framework - Basic Concept Kunal Chowdhury has a 3-part tutorial series on Silverlight Navigation up. This is the first in the series, and he hits the basics... what constitutes a Page, and how to get started with the navigation framework. How to Connect to and Diagram your SQL Express Database in Visual Studio LightSwitch Beth Massi's latest LightSwitch post is on using the Data Designer to easily crete and model database tables... during development this is in SQL Express, but can be deployed to most SQL server db you like Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Coding different states in Adventure Games

  - by Cardin

  I'm planning out an adventure game, and can't figure out what's the right way to implement the behaviour of a level depending on state of story progression. My single-player game features a huge world where the player has to interact with people in a town at various points in the game. However, depending on story progression, different things would be presented to the player, for e.g. the Guild Leader will change locations from the town square to various locations around the city; Doors would only unlock at certain times of the day after finishing a particular routine; Different cut-screen/trigger events happen only after a particular milestone has been reached. I naively thought of using a switch{} statement initially to decide what the NPC should say or which he could be found at, and making quest objectives interact-able only after checking a global game_state variable's condition. But I realised I would quickly run into a lot of different game states and switch-cases in order to change the behaviour of an object. That switch statement would also be massively hard to debug, and I guess it might also be hard to use in a level editor. So I thought, instead of having a single object with multiple states, maybe I should have multiple instances of the same object, with a single state. That way, if I use something like a level editor, I can put an instance of the NPC at all the different locations he could ever appear at, and also an instance for each conversation state he has. But that means there'll be a lot of inactive, invisible game objects floating around the level, which might be trouble for memory, or simply hard to see in a level editor, i don't know. Or simply, make an identical, but separate level for each game state. This feels the cleanest and bug-free way to do things, but it feels like massive manual work making sure each version of the level is really identical to each other. All my methods feel so inefficient, so to recap my question, is there a better or standardised way to implement behaviour of a level depending on state of story progression? PS: I don't have a level editor yet - thinking of using something like JME SDK or making my own.

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• Silverlight Cream for November 22, 2011 -- #1172

  - by Dave Campbell

  In this Issue: XAMLGeek, WindowsPhoneGeek, Nigel Sampson, Jesse Liberty, Sumit Dutta(-2-), Dave Bost, Jared Bienz, Joost van Schaik, and Michael Crump. Above the Fold: Silverlight: "10 Laps around Silverlight 5 (Part 7 of 10)" Michael Crump WP7: "Using MVVMLight, ItemsControl, Blend and behaviors to make a ‘heads up compass’" Joost van Schaik Metro/WinRT/W8: "“Badevand” for Windows 8" XAMLGeek Shoutouts: Michael Palermo's latest Desert Mountain Developers is up Michael Washington's latest Visual Studio #LightSwitch Daily is up From SilverlightCream.com:“Badevand” for Windows 8XAMLGeek posted a Metro app that shows water and air temperature and rain level for 5 beaches in Copenhagen, Denmark... no source, but good to see people posting appsGetting Started with Windows Phone RemindersWindowsPhoneGeek digs into Reminders in this WP7.1 post... the code you need, description, and a project to downloadHelp my app has been revoked!Nigel Sampson had a surprise when his latest app was revoked on his device, and then another... read what the solution wasA Dozen Windows Phone Videos… And CountingJesse Liberty posted his 12th WP7.1 video on Channel 9 - all about Reminders in MangoPart 23 - Windows Phone 7 - Detect Operator and Network InformationSumit Dutta has 2 more parts to his WP7 quest up... this part 23 is about getting mobile operator information and hot to get network capabilities using Microsoft.Phone.Net.DeviceNetworkInformationPart 24 - Windows Phone 7 - Microphone RepeaterIn part 24, Sumit Dutta uses the Microsoft.Xna.Framework Microphone class to record and play back voice.31 Days of Mango | Day #13: Marketplace Test KitDave Bost is at the helm of Jeff Blankenburg's Day 13 in his 31 day quest, discussing the Marketplace Test Kit and showing how to use it to determine if your app is ready for certification31 Days of Mango | Day #12; Beta DistributionJeff Blankenburg's Day 12 is written by guest author Jared Bienz, and shows how to submit an application for Beta testingUsing MVVMLight, ItemsControl, Blend and behaviors to make a ‘heads up compass’Joost van Schaik has a tutorial up showing how to make a WP7 Compass app using MVVMLight, Expression Blend, and then shows his thoughts on using the ItemsControl and Behaviors... code, descriptions and a project to download.... and I think I got your name right for the first time, Joost :)10 Laps around Silverlight 5 (Part 7 of 10)Michael Crump put out part 7 of his Silverlight 5 series at SilverlightShow... this is actually part 2 of OS Integration with Silverlight covering, among other things, 64-bit browser support and Power AwarenessStay in the 'Light!Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCreamJoin me @ SilverlightCream | Phoenix Silverlight User GroupTechnorati Tags:Silverlight    Silverlight 3    Silverlight 4    Windows PhoneMIX10

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