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Dynamic localization with Data Annotations possible?

- by devries48

Hi, I'm trying to dynamicly update the language of a Silverlight application. I tried the example provided by Tim Heuer and that was exactly wat I needed. Silverlight and localizing string data Now I'm experimenting with Data Annotations and would like to have the same behaviour.But with no luck... Can someone point me in the right direction. DataAnnotation of a property: [Display(Name = "UserNameLabel", ResourceType = typeof(Resources.Strings.StringResources))] [Required] public string Username ... My Xaml: <dataInput:Label Target="{Binding ElementName=tbUserName}" PropertyPath="UserName"/> Thanks, Ron

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Is Inheritance in Struts2 Model-Driven Action possible?

- by mryan

Hello, I have a Model-Driven Struts2 action that provides correct JSON response. When I re-structure the action I get an empty JSON response back. Has anyone got inheritance working with Struts2 Model-Driven actions? Ive tried explicitly setting include properties in struts config: <result name="json" type="json"> <param name="includeProperties"> jsonResponse </param> </result> Code for all actions below - not actual code in use - I have edited and stripped down for clarity. Thanks in advance. Action providing correct response: public class Bike extends ActionSupport implements ModelDriven, Preparable { @Autowired private Service bikeService; private JsonResponse jsonResponse; private com.ets.model.Vehicle bike; private int id; public Bike() { jsonResponse = new JsonResponse("Bike"); } @Override public void prepare() throws Exception { if (id == 0) { bike = new com.ets.model.Bike(); } else { bike = bikeService.find(id); } } @Override public Object getModel() { return bike; } public void setId(int id) { this.id = id; } public void setBikeService(@Qualifier("bikeService") Service bikeService) { this.bikeService = bikeService; } public JsonResponse getJsonResponse() { return jsonResponse; } public String delete() { try { bike.setDeleted(new Date(System.currentTimeMillis())); bikeService.updateOrSave(bike); jsonResponse.addActionedId(id); jsonResponse.setAction("delete"); jsonResponse.setValid(true); } catch (Exception exception) { jsonResponse.setMessage(exception.toString()); } return "json"; } } Re-structured Actions providing incorrect response: public abstract class Vehicle extends ActionSupport implements ModelDriven { @Autowired protected Service bikeService; @Autowired protected Service carService; protected JsonResponse jsonResponse; protected com.ets.model.Vehicle vehicle; protected int id; protected abstract Service service(); @Override public Object getModel() { return bike; } public void setId(int id) { this.id = id; } public void setBikeService(@Qualifier("bikeService") Service bikeService) { this.bikeService = bikeService; } public void setCarService(@Qualifier("carService") Service carService) { this.carService = carService; } public JsonResponse getJsonResponse() { return jsonResponse; } public String delete() { try { vehicle.setDeleted(new Date(System.currentTimeMillis())); service().updateOrSave(vehicle); jsonResponse.addActionedId(id); jsonResponse.setAction("delete"); jsonResponse.setValid(true); } catch (Exception exception) { jsonResponse.setMessage(exception.toString()); } return "json"; } } public class Bike extends Vehicle implements Preparable { public Bike() { jsonResponse = new JsonResponse("Bike"); } @Override public void prepare() throws Exception { if (id == 0) { vehicle = new com.ets.model.Bike(); } else { vehicle = bikeService.find(id); } } @Override protected Service service() { return bikeService; } } public class Car extends Vehicle implements Preparable { public Car() { jsonResponse = new JsonResponse("Car"); } @Override public void prepare() throws Exception { if (id == 0) { vehicle = new com.ets.model.Car(); } else { vehicle = carService.find(id); } } @Override protected Service service() { return carService; } }

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How to ignore GUI as much as possible without rendering APP less GUI developer friendly

- by pbernatchez

The substance of an app is more important to me than its apperance, yet GUI always seems to dominate a disproportionate percentage of programmer time, development and target resource requirements/constraints. Ideally I'd like an application architecture that will permit me to develop an app using a lightweight reference GUI/kit and focus on non gui aspects to produce a quality app which is GUI enabled/friendly. I would want APP and the GUI to be sufficiently decoupled to maximize the ease for you GUI experts to plug the app into to some target GUI design/framework/context. e.g. targets such as: termcap GUI, web app GUI framework, desktop GUI, thin client GUI. In short: How do I mostly ignore the GUI, but avoid painting you into a corner when I don't even know who you are yet?

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C# PrintPreviewDialog Modification possible?

- by C. Griffin

Currently, what I'm doing is this: Using the built-in .NET PrintPreviewDialog Attaching my own Click handler to the Print button, which allows for the user to select the printer before finally printing. This all WORKS, HOWEVER, the OnprintToolStripButtonClick event is still sending the document to the default printer BEFORE the user gets to choose the actual printer and click Print (which works, but they're getting an extra copy on the default printer first from the old Handler). Can I remove this built-in Click handler? I've tried the other methods mentioned on here in regards to using an EventHandlerList to remove the handlers, but it doesn't work for the built-in printing event. Here is a copy of my current code in case it helps clarify: // ... Irrelevant code before this private PrintPreviewDialog ppdlg; ToolStrip ts = new ToolStrip(); ts.Name = "wrongToolStrip"; foreach (Control ctl in ppdlg.Controls) { if (ctl.Name.Equals("toolStrip1")) { ts = ctl as ToolStrip; break; } } ToolStripButton printButton = new ToolStripButton(); foreach (ToolStripItem tsi in ts.Items) { if (tsi.Name.Equals("printToolStripButton")) { printButton = tsi as ToolStripButton; } } printButton.Click += new EventHandler(this.SelectPrinterAfterPreview); // ... Irrelevant code afterwards omitted // Here is the Handler for choosing a Printer that gets called after the // PrintPreviewDialog's "Print" button is clicked. private void SelectPrinterAfterPreview(object sender, EventArgs e) { frmMainPage frmMain = (frmMainPage)this.MdiParent; if (frmMain.printDialog1.ShowDialog() == DialogResult.OK) { pd.PrinterSettings.PrinterName = frmMain.printDialog1.PrinterSettings.PrinterName; pd.PrinterSettings.Copies = frmMain.printDialog1.PrinterSettings.Copies; pd.Print(); } }

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GoogleAppEngine : possible to disable FileUpload?

- by James.Elsey

Hi, When I deploy my application to GoogleAppEngine I keep getting the following error Uncaught exception from servlet java.lang.NoClassDefFoundError: java.io.FileOutputStream is a restricted class. Please see the Google App Engine developer's guide for more details. at com.google.apphosting.runtime.security.shared.stub.java.io.FileOutputStream.<clinit>(FileOutputStream.java) at org.apache.log4j.FileAppender.setFile(FileAppender.java:289) at org.apache.log4j.FileAppender.activateOptions(FileAppender.java:163) at org.apache.log4j.config.PropertySetter.activate(PropertySetter.java:256) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:132) at org.apache.log4j.config.PropertySetter.setProperties(PropertySetter.java:96) at org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:654) at org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:612) at org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:509) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:415) at org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:441) at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:468) at org.apache.log4j.LogManager.<clinit>(LogManager.java:122) at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:88) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685) at org.springframework.web.context.ContextLoader.<clinit>(ContextLoader.java:146) at org.springframework.web.context.ContextLoaderListener.createContextLoader(ContextLoaderListener.java:53) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:44) at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548) at org.mortbay.jetty.servlet.Context.startContext(Context.java:136) at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250) at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517) at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467) at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.createHandler(AppVersionHandlerMap.java:191) at com.google.apphosting.runtime.jetty.AppVersionHandlerMap.getHandler(AppVersionHandlerMap.java:168) at com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:123) at com.google.apphosting.runtime.JavaRuntime.handleRequest(JavaRuntime.java:243) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5485) at com.google.apphosting.base.RuntimePb$EvaluationRuntime$6.handleBlockingRequest(RuntimePb.java:5483) at com.google.net.rpc.impl.BlockingApplicationHandler.handleRequest(BlockingApplicationHandler.java:24) at com.google.net.rpc.impl.RpcUtil.runRpcInApplication(RpcUtil.java:398) at com.google.net.rpc.impl.Server$2.run(Server.java:852) at com.google.tracing.LocalTraceSpanRunnable.run(LocalTraceSpanRunnable.java:56) at com.google.tracing.LocalTraceSpanBuilder.internalContinueSpan(LocalTraceSpanBuilder.java:536) at com.google.net.rpc.impl.Server.startRpc(Server.java:807) at com.google.net.rpc.impl.Server.processRequest(Server.java:369) at com.google.net.rpc.impl.ServerConnection.messageReceived(ServerConnection.java:442) at com.google.net.rpc.impl.RpcConnection.parseMessages(RpcConnection.java:319) at com.google.net.rpc.impl.RpcConnection.dataReceived(RpcConnection.java:290) at com.google.net.async.Connection.handleReadEvent(Connection.java:474) at com.google.net.async.EventDispatcher.processNetworkEvents(EventDispatcher.java:831) at com.google.net.async.EventDispatcher.internalLoop(EventDispatcher.java:207) at com.google.net.async.EventDispatcher.loop(EventDispatcher.java:103) at com.google.net.rpc.RpcService.runUntilServerShutdown(RpcService.java:251) at com.google.apphosting.runtime.JavaRuntime$RpcRunnable.run(JavaRuntime.java:404) at java.lang.Thread.run(Unknown Source) I've checked the documentation and it suggests to create a FileUpload class, since I won't be uploading files/documents etc from my application, is this necessary? Is there a way to disable this functionality, or at least bypass this error? I have already provided implementation for a MultipartWrapperFactory.Class as that has been suggested from searching for this error Thanks

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Possible reasons for tellg() failing?

- by Andreas Bonini

ifstream::tellg() is returning -13 for a certain file. Basically, I wrote a utility that analyzes some source code; I open all files alphabetically, I start with "Apple.cpp" and it works perfectly.. But when it gets to "Conversion.cpp", always on the same file, after reading one line successfully tellg() returns -13. The code in question is: for (int i = 0; i < files.size(); ++i) { /* For each .cpp and .h file */ TextIFile f(files[i]); while (!f.AtEof()) // When it gets to conversion.cpp (not on the others) // first is always successful, second always fails lines.push_back(f.ReadLine()); The code for AtEof is: bool AtEof() { if (mFile.tellg() < 0) FATAL(format("DEBUG - tellg(): %d") % mFile.tellg()); if (mFile.tellg() >= GetSize()) return true; return false; } After it reads successfully the first line of Conversion.cpp, it always crashes with DEBUG - tellg(): -13. This is the whole TextIFile class (wrote by me, the error may be there): class TextIFile { public: TextIFile(const string& path) : mPath(path), mSize(0) { mFile.open(path.c_str(), std::ios::in); if (!mFile.is_open()) FATAL(format("Cannot open %s: %s") % path.c_str() % strerror(errno)); } string GetPath() const { return mPath; } size_t GetSize() { if (mSize) return mSize; const size_t current_position = mFile.tellg(); mFile.seekg(0, std::ios::end); mSize = mFile.tellg(); mFile.seekg(current_position); return mSize; } bool AtEof() { if (mFile.tellg() < 0) FATAL(format("DEBUG - tellg(): %d") % mFile.tellg()); if (mFile.tellg() >= GetSize()) return true; return false; } string ReadLine() { string ret; getline(mFile, ret); CheckErrors(); return ret; } string ReadWhole() { string ret((std::istreambuf_iterator<char>(mFile)), std::istreambuf_iterator<char>()); CheckErrors(); return ret; } private: void CheckErrors() { if (!mFile.good()) FATAL(format("An error has occured while performing an I/O operation on %s") % mPath); } const string mPath; ifstream mFile; size_t mSize; }; Platform is Visual Studio, 32 bit, Windows. Edit: Works on Linux. Edit: I found the cause: line endings. Both Conversion and Guid and others had \n instead of \r\n. I saved them with \r\n instead and it worked. Still, this is not supposed to happen is it?

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Properly handling possible System.NullReferenceException in lambda expressions

- by Travis Johnson

Here's the query in question return _projectDetail.ExpenditureDetails .Where(detail => detail.ProgramFund == _programFund && detail.Expenditure.User == _creditCardHolder) .Sum(detail => detail.ExpenditureAmounts.FirstOrDefault( amount => amount.isCurrent && !amount.requiresAudit) .CommittedMonthlyRecord.ProjectedEac); Table Structure ProjectDetails (1 to Many) ExpenditureDetails ExpenditureDetails (1 to Many) ExpenditureAmounts ExpenditureAmounts (1 to 1) CommittedMonthlyRecords ProjectedEac is a decimal field on the CommittedMonthlyRecords. The problem I discovered in a Unit test (albeit an unlikely event), that the following line could be null: detail.ExpenditureAmounts.FirstOrDefault( amount => amount.isCurrent && !amount.requiresAudit) My original query was a nested loop, in where I would be making multiple trips to the database, something I don't want to repeat. I've looked in to what seemed like some similar questions here, but the solution didn't seem to fit. Any ideas?

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Box2d: Maximum possible linear velocity?

- by Rosarch

I think I've configured Box2d to have some sort of maximum velocity for any body, but I'm not sure. I apply an impulse like (100000000, 100000000), and the body moves just as fast as (100, 100) - which is not that fast at all. My game is a top-down 2d. Here is some code that may be relevant: private readonly Vector2 GRAVITY = new Vector2(0, 0); public void initializePhysics(ContactReporter contactReporter) { world = new World(GRAVITY, true); IContactListener contactListener = contactReporter; world.ContactListener = contactListener; } public void Update(GameTime gameTime) { // ... worldState.PhysicsWorld.Step((float)gameTime.ElapsedGameTime.TotalSeconds, 10, 10); //... }

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iPad <-> iPhone GameKit connection over bluetooth possible?

- by Mike

Has anyone established GameKit connectivity between an iPhone app running on an iPad and an iPhone app running on an iPhone? I tried the GKTank example and they won't connect. The iPad throws a "Error: 30509 -- Bluetooth not available.." error when trying to connect.

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Can overloading is possible with two version of function, constant member function and function with

- by GG

Hello, I just came across various overloading methods like type of parameter passed, varying number of parameters, return type etc. I just want to know that can I overload a function with following two version //function which can modify member String& MyClass::doSomething(); //constant member function String& MyClass::doSomething() const; Please let me know the reason behind it. Thanks, GG

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Is it possible to make customizable WPF styles?

- by Dheeraj Kumar

I really like WPF because of its awesome skinning support by changing resourcedictionaries on the fly, but the catch is, the styles must be made by designers in XAML. My client needs a skinnable UI where the end users can make skins themselves. My question is - In Photoshop, you can take any image, and add a color overlay to change all the colors to that hue. Can you do something similar in WPF? I'm just a beginner, and looking at several WPF styles, it seems like all the color values are hard-coded. Here's a sample scenario - user selects two colors from color pickers, and all the controls have a gradient background from Color1 to Color2.

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Android: databinding when using a ArrayAdapter: possible?

- by Peterdk

I need some simple databinding for a Spinner. I want to display 2 items for each dropdownitem. So when the user clicks the spinner I get a list like: ------------------- Name 123456 ------------------- Name 123456 ------------------- I understand this can be done when using a Cursor, according to the databinding info on android dev. Like: SimpleCursorAdapter adapter2 = new SimpleCursorAdapter(this, R.layout.my_custom_spinner_item_layout, cur, new String[] {People.NAME, People.ID}, new int[] {android.R.id.text1, android.R.id.text2}); However, I don't get my data from a database, so I don't use a cursor, I use a ArrayAdapter. Unfortunately it looks like there is no support for databinding with this adapter. Is there a way to do this?

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Is it possible to run an ng-switch directly on a select > option

- by Asok

Has anyone been able to run an ng-switch on a <select> -> <option> tag, like so?: <select ng-model="form.permitLocality" ng-switch on="localityTypeRadio"> <option ng-switch-when="County" ng-repeat="county in countyList"> {{ county.name }} </option> <option ng-switch-when="City" ng-repeat="city in cityList"> {{ city.name }} </option> <option ng-switch-when="Town" ng-repeat="town in townList"> {{ town.name }} </option> </select> I am not getting any errors or any options (all values verified), I just thought it would save me a couple lines and thought I'd try it. Here is my selector, in case you're curious (value verified): <label class="radio inline"> <input type="radio" name="localityTypeRadio" ng-model="localityTypeRadio" value="County"> County </label> <label class="radio inline"> <input type="radio" name="localityTypeRadio" ng-model="localityTypeRadio" value="City"> City </label> <label class="radio inline"> <input type="radio" name="localityTypeRadio" ng-model="localityTypeRadio" value="Town"> Town </label> This is not a big deal, just didn't know if this was a limitation / not recommended with an ng-switch EDIT I was mistaken when I initially said that nothing was happening (browser caching), there appears to be the correct number of options but the source code shows nothing but white space: <select ng-model="form.permitLocality" class="input-block-level ng-pristine ng-valid" ng-switch="" on="localityTypeRadio" ng-hide="form.permitLocality.length"><option value="? string: ?"></option>  <option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option><option ng-switch-when="City" ng-repeat="city in cityList" class="ng-scope ng-binding" value=" "> </option>  </select>

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Silverlight ViewBase in separate assembly - possible?

- by Mark

I have all my views in a project inheriting from a ViewBase class that inherits from UserControl. In my XAML I reference it thus: <f:ViewBase x:Class="Forte.UI.Modules.Configure.Views.AddNewEmployeeView" xmlns:f="clr-namespace:Forte.UI.Modules.Configure.Views" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" It works fine. Now I have moved the ViewBase to another project (so I can refernce it from multiple projects) so I reference it like: <f:ViewBase x:Class="Forte.UI.Modules.Configure.Views.AddNewEmployeeView" xmlns:f="clr-namespace:Forte.UI.Modules.Common.Views;assembly=Forte.UI.Modules.Common" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" This works fine when I run from the IDE but when I run the same sln from MSBuild it gives a warning: "H:\dev\ExternalCopy\Code\UI\Modules\Configure\Forte.UI.Modules.Configure.csproj" (default target) (10:12) - (ValidateXaml target) - H:\dev\ExternalCopy\Code\UI\Modules\Configure\Views\AddNewEmployee\AddNewEmployeeView.xaml(1,2,1,2): warning : The tag 'ViewBase' does not exist in XML namespace 'clr-namespace:Forte.UI.Modules.Common.Views;assembly=Forte.UI.Modules.Common'. Then fails with: "H:\dev\ExternalCopy\Code\UI\Modules\Configure\Forte.UI.Modules.Configure.csproj" (default target) (10:12) - (ValidateXaml target) - C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Silverlight.Common.targets(210,9): error MSB4018: The "ValidateXaml" task failed unexpectedly.\r C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Silverlight.Common.targets(210,9): er ror MSB4018: System.NullReferenceException: Object reference not set to an instance of an object.\r C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Silverlight.Common.targets(210,9): er ror MSB4018: at MS.MarkupCompiler.ValidationPass.ValidateXaml(String fileName, Assembly[] assemb lies, Assembly callingAssembly, TaskLoggingHelper log, Boolean shouldThrow)\r C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Silverlight.Common.targets(210,9): er ror MSB4018: at Microsoft.Silverlight.Build.Tasks.ValidateXaml.XamlValidator.Execute()\r C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Silverlight.Common.targets(210,9): er ror MSB4018: at Microsoft.Silverlight.Build.Tasks.ValidateXaml.XamlValidator.Execute()\r C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Silverlight.Common.targets(210,9): er ror MSB4018: at Microsoft.Silverlight.Build.Tasks.ValidateXaml.Execute()\r C:\Program Files\MSBuild\Microsoft\Silverlight\v3.0\Microsoft.Silverlight.Common.targets(210,9): er ror MSB4018: at Microsoft.Build.BuildEngine.TaskEngine.ExecuteInstantiatedTask(EngineProxy engin eProxy, ItemBucket bucket, TaskExecutionMode howToExecuteTask, ITask task, Boolean& taskResult) Any ideas what might be causing this behaviour? Using Silverlight 3 Here is a cut down version of the MSBuild file that fails to build the sln that builds fine in the IDE (sorry couldn't get it to format here): <?xml version="1.0" encoding="utf-8" ?> <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003" DefaultTargets="Compile"> <ItemGroup> <ProjectToBuild Include="..\UI\Forte.UI.sln"> <Properties>Configuration=Debug</Properties> </ProjectToBuild> </ItemGroup> <Target Name="Compile"> <MSBuild Projects="@(ProjectToBuild)"></MSBuild> </Target> </Project> Thanks for any help!

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Java web-app debugging not possible due to direct undeploy on debug

- by Hendrik

When i try to debug my webapp it starts up the tomcat server and the application, but shuts down the debugger shortly before the app gets usable. I see the debugging toolbar for a second before it vanishes again, though the app keeps running. Tomcat-log: Listening for transport dt_socket at address: 11555 23.03.2010 01:24:35 org.apache.catalina.core.AprLifecycleListener init INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: .:/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java 23.03.2010 01:24:35 org.apache.coyote.http11.Http11Protocol init INFO: Initializing Coyote HTTP/1.1 on http-8084 23.03.2010 01:24:35 org.apache.catalina.startup.Catalina load INFO: Initialization processed in 847 ms 23.03.2010 01:24:35 org.apache.catalina.core.StandardService start INFO: Starting service Catalina 23.03.2010 01:24:35 org.apache.catalina.core.StandardEngine start INFO: Starting Servlet Engine: Apache Tomcat/6.0.20 log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader). log4j:WARN Please initialize the log4j system properly. 23.03.2010 01:24:41 org.apache.coyote.http11.Http11Protocol start INFO: Starting Coyote HTTP/1.1 on http-8084 23.03.2010 01:24:41 org.apache.jk.common.ChannelSocket init INFO: JK: ajp13 listening on /0.0.0.0:8009 23.03.2010 01:24:41 org.apache.jk.server.JkMain start INFO: Jk running ID=0 time=0/78 config=null 23.03.2010 01:24:41 org.apache.catalina.startup.Catalina start INFO: Server startup in 5855 ms 23.03.2010 01:24:42 org.apache.catalina.startup.HostConfig checkResources INFO: Undeploying context [] 23.03.2010 01:24:45 org.apache.catalina.core.StandardContext start INFO: Container org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/] has already been started Debugging log: Attached JPDA debugger to localhost:11555 Checking data source definitions for missing JDBC drivers... Deploying JDBC driver to /Applications/NetBeans/apache-tomcat-6.0.20/lib/mysql-connector-java-5.1.6-bin.jar Stopping Tomcat process... Waiting for Tomcat... Tomcat server stopped. Starting Tomcat process... Waiting for Tomcat... Tomcat server started. Undeploying ... OK - Undeployed application at context path / In-place deployment at /path/to/project/dir/build/web deploy?config=file%3A%2Fvar%2Ffolders%2FZP%2FZPbqxGrbHFaUlXzAfgWV1%2B%2B%2B%2BTQ%2F-Tmp-%2Fcontext734173871283203218.xml&path=/ OK - Deployed application at context path / start?path=/ Start is in progress... OK - Started application at context path / debug-display-browser: Browsing: http://localhost:8084/ connect-client-debugger: BUILD SUCCESSFUL (total time: 18 seconds) System is Netbeans 6.8 on MacOS 10.6.2. Thank you very much, guys!

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Lambdas within Extension methods: Possible memory leak?

- by Oliver

I just gave an answer to a quite simple question by using an extension method. But after writing it down i remembered that you can't unsubscribe a lambda from an event handler. So far no big problem. But how does all this behave within an extension method?? Below is my code snipped again. So can anyone enlighten me, if this will lead to myriads of timers hanging around in memory if you call this extension method multiple times? I would say no, cause the scope of the timer is limited within this function. So after leaving it no one else has a reference to this object. I'm just a little unsure, cause we're here within a static function in a static class. public static class LabelExtensions { public static Label BlinkText(this Label label, int duration) { Timer timer = new Timer(); timer.Interval = duration; timer.Tick += (sender, e) => { timer.Stop(); label.Font = new Font(label.Font, label.Font.Style ^ FontStyle.Bold); }; label.Font = new Font(label.Font, label.Font.Style | FontStyle.Bold); timer.Start(); return label; } }

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Collision Attacks, Message Digests and a Possible solution

- by Dominar

I've been doing some preliminary research in the area of message digests. Specifically collision attacks of cryptographic hash functions such as MD5 and SHA-1, such as the Postscript example and X.509 certificate duplicate. From what I can tell in the case of the postscript attack, specific data was generated and embedded within the header of the postscript (which is ignored during rendering) which brought about the internal state of the md5 to a state such that the modified wording of the document would lead to a final MD equivalent to the original. The X.509 took a similar approach where by data was injected within the comment/whitespace of the certificate. Ok so here is my question, and I can't seem to find anyone asking this question: Why isn't the length of ONLY the data being consumed added as a final block to the MD calculation? In the case of X.509 - Why is the whitespace and comments being taken into account as part of the MD? Wouldn't a simple processes such as one of the following be enough to resolve the proposed collision attacks: MD(M + |M|) = xyz MD(M + |M| + |M| * magicseed_0 +...+ |M| * magicseed_n) = xyz where : M : is the message |M| : size of the message MD : is the message digest function (eg: md5, sha, whirlpool etc) xyz : is the acutal message digest value for the message M magicseed_{i}: Is a set random values generated with seed based on the internal-state prior to the size being added. This technqiue should work, as to date all such collision attacks rely on adding more data to the original message. In short, the level of difficulty involved in generating a collision message such that: It not only generates the same MD But is also comprehensible/parsible/compliant and is also the same size as the original message, is immensely difficult if not near impossible. Has this approach ever been discussed? Any links to papers etc would be nice.

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Simple way to return anonymous types (to make MVC using LINQ possible)

- by BlueRaja The Green Unicorn

I'd like to implement MVC while using LINQ (specifically, LINQ-to-entities). The way I would do this is have the Controller generate (or call something which generates) the result-set using LINQ, then return that to the View to display the data. The problem is, if I do: return (from o in myTable select o); All the columns are read from the database, even the ones (potentially dozens) I don't want. And - more importantly - I can't do something like this: return (from o in myTable select new { o.column }); because there is no way to make anonymous types type-safe! I know for sure there is no nice, clean way of doing this in 3.5 (this is not clean...), but what about 4.0? Is there anything planned, or even proposed? Without something like duck-typing-for-LINQ, or type-safe anonymous return values (it seems to me the compiler should certainly be capable of that), it appears to be nearly impossible to cleanly separate the Controller from the View.

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Is it possible to access a COM Object from Linux

- by wodka

Office is running in Wine, meaning I have a running Version (2003). But when I try to create a new COM object I just get the following error: Fatal error: Class 'COM' not found <?php $com = new COM('Word.Application'); $com-close(); Is there a way to get this working without installing Windows?

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Is that possible using "setAutoresizingMask" to make the view autoresizing after hiding/showing navi

- by Mickey Shine

I am doing this with the following: [[self navigationController] setNavigationBarHidden:YES animated:YES]; and also I didn't use IB to create view objects. But my view did not auto-resize after hiding navigation bar(there was a blank area where the navigation bar used to be) I am wondering if I could make it auto-resize only by "setAutoresizingMask", or do I have to use some hand-writing animation stuff?

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finding a string of random characters (with possible errors) within a large string of random charact

- by mike

I am trying to search a large string w/o spaces for a smaller string of characters. using regex I can easily find perfect matches but I can't figure out how to find partial matches. by partial matches i mean one or two extra characters in the string or one or two characters that have been changed, or one of each. the first and last characters will always match though. this would be similar to a spell checker but there are no spaces and the strings dont contain actual words, just random hex digits. i figured a way to find the string if there are no extra characters using indexOf(string.charAt(0)) and indexOf(charAt(string.length()-1) and looping through the characters between the two indexes. but this can be problematic when dealing with randomized characters because of the possibility of finding the first and last characters at the correct spacing but none of the middle characters matching. i've been scratching my head for hours on this issue. any ideas?

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allow two possible values in a excel cell

- by Josemalive

Hi, I would like to create a cell format for one cell to only allow the value "yes" or "no" for this cell. How could i do this? Thanks in advance. Jose

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Is it possible to create a generic Util Function to be used in Eval Page

- by Nassign

I am currently binding a Nullable bit column to a listview control. When you declare a list view item I need to handle the case when the null value is used instead of just true or false. <asp:Checkbox ID="Chk1" runat="server" Checked='<%# HandleNullableBool(Eval("IsUsed")) %>' /> Then in the page I add a HandleNullableBool() function inside the ASPX page. protected static bool HandleNullableBool(object value) { return (value == null) ? false : (bool)value; } This works fine but I need to use this in several pages so I tried creating a utility class with a static HandleNullableBool. But using it in the asp page does not work. Is there a way to do this in another class instead of the ASPX page? <asp:Checkbox ID="Chk1" runat="server" Checked='<%# Util.HandleNullableBool(Eval("IsUsed")) %>' />

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ruby eval('\1') of gsub possible?

- by Horace Ho

I try to replace a sub-str by the content of a valiable where its name matches the sub-str by: >> str = "Hello **name**" => "Hello **name**" >> name = "John" => "John" str.gsub(/\*\*(.*)\*\*/, eval('\1')) # => error! the last line in the code above is a syntax error. and: >> str.gsub(/\*\*(.*)\*\*/, '\1') => "Hello name" >> str.gsub(/\*\*(.*)\*\*/, eval("name")) => "Hello John" what I want is the result of: str.gsub(/\*\*(.*)\*\*/, eval("name")) # => "Hello John" any help will be appreciated. thx!

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Is this design possible with ExtJS?

- by gargantaun

I've been asked to do the front end for a web app, and to use ExtJS specifically. I've been working through a couple of tutorials, but I've not seen much variation on the default ExtJS look and feel except for some subtle changes to the colors and what not. The design I've been handed seems to be a radical departure from the standard ExtJs look and feel. So before I head down a dead end or start chasing wild geese, I wondered wether any ExtJS experts out there could point out any potential pit falls in the design, or is everything do-able? The design is here... cheers -t

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