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• Using Ninject 2.0 with ASP .Net 3.5

  - by GK

  Hi, I am trying to use Ninject 2.0 with Asp .Net 3.5 web application. Following are the DLLS and it's versions I am using. Ninject.dll - v2.0.0.0 Ninject.Extensions.Logging.dll v2.0.0.0 Ninject.Web.dll v1.0.0.0 In my global.ascx.cs I have following method. protected override IKernel CreateKernel() { IKernel kernel = new StandardKernel(); kernel.Bind<IDataAccess>().To<DataAccessEntBlock>().InSingletonScope(); return kernel; } When I run the application I get following error. Error activating ILoggerFactory No matching bindings are available, and the type is not self-bindable. Activation path: 1) Request for ILoggerFactory Suggestions: 1) Ensure that you have defined a binding for ILoggerFactory. 2) If the binding was defined in a module, ensure that the module has been loaded into the kernel. 3) Ensure you have not accidentally created more than one kernel. 4) If you are using automatic module loading, ensure the search path and filters are correct. I am not understanding even though I am not trying to register Logger, it seems it is trying to create it's own. How can I resolve this error ? Do I have to use any of the Ninject's extension Logger ? Thanks GK

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• How can I dynamically access user control properties?

  - by rahkim

  Im trying to create a "user control menu" where links to a page's usercontrols are placed at the top of the page. This will allow me to put several usercontrols on a page and allow the user to jump to that section of the page without scrolling so much. In order to do this, I put each usercontrol in a folder (usercontrols) and gave each control a Description property (<%@ Control Language="C#" Description = "Vehicles" .... %>). My question is how can I access this description dynamically? I want to use this description as the link in my menu. So far, I have a foreach on my page that looks in the ControlCollection for a control that is of the ASP.usercontrols type. If it is I would assume that I could access its attributes and grab that description property. How can I do this? (Im also open to a better way to achieve my "user control menu", but maybe thats another question.) Should I use ((System.Web.UI.UserControl)mydynamiccontrol).Attributes.Keys?

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• Resolving IEnumerable<T> with Unity

  - by Mark Seemann

  Can Unity automatically resolve IEnumerable<T>? Let's say I have a class with this constructor: public CoalescingParserSelector(IEnumerable<IParserBuilder> parserBuilders) and I configure individual IParserBuilder instances in the container: container.RegisterType<IParserSelector, CoalescingParserSelector>(); container.RegisterType<IParserBuilder, HelpParserBuilder>(); container.RegisterType<IParserBuilder, SomeOtherParserBuilder>(); can I make this work without having to implement a custom implementation of IEnumerable<IParserBuilder>? var selector = container.Resolve<IParserSelector>(); So far I haven't been able to express this in any simple way, but I'm still ramping up on Unity so I may have missed something.

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• ASP.NET MVC Get a list of users with particular profile properties

  - by Sam Huggill

  Hi, I'm using ASP.NET MVC 1 and I have added a custom Profile class using the WebProfile Builder VS add-in (found here: http://code.msdn.microsoft.com/WebProfileBuilder/Release/ProjectReleases.aspx?ReleaseId=980). On one of my forms I want a drop-down list of all users who share a specific profile value in common. I can see that I can get a list of all users using: Membership.GetAllUsers() However I cannot see how to get all users who have a specific profile value, which in my case is CellId. Am I approaching this in the right way? I have used membership roles to define which users are administrators etc, but profiles seems like the right place to group users. Any pointers both in specifics of how to access the user list but also comments on whether am I pursuing the right avenue here would be greatly appreciated. Many thanks, Sam

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• Binding from View-Model to View-Model of a child User Control in Silverlight? 2 sources - 1 target..

  - by andrej351

  Hi there, So i have a UserControl for one of my Views and have another 'child' UserControl inside that. The outer 'parent' UserControl has a Collection on its View-Model and a Grid control on it to display a list of Items. I want to place another UserControl inside this UserControl to display a form representing the details of one Item. The outer / parent UserControl's View-Model already has a property on it to hold the currently selected Item and i would like to bind this to a DependancyProperty on the inner / child UserControl. I would then like to bind that DependancyProperty to a property on the child UserControl's View-Model. I can then set the DependancyProperty once in XAML with a binding expression and have the child UserControl do all its work in its View-Model like it should. The code i have looks like this.. Parent UserControl: <UserControl x:Class="ItemsListView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" DataContext="{Binding Source={StaticResource ServiceLocator}, Path=ItemsListViewModel}"> <!-- Grid Control here... --> <ItemDetailsView Item="{Binding Source={StaticResource ServiceLocator}, Path=ItemsListViewModel.SelectedItem}" /> </UserControl> Child UserControl: <UserControl x:Class="ItemDetailsView" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" DataContext="{Binding Source={StaticResource ServiceLocator}, Path=ItemDetailsViewModel}" ItemDetailsView.Item="{Binding Source={StaticResource ServiceLocator}, Path=ItemDetailsViewModel.Item, Mode=TwoWay}"> <!-- Form controls here... --> </UserControl> The selected Item is bound to the DependancyProperty fine. However from the DependancyProperty to the child View-Model does not. It appears to be a situation where there are two concurrent bindings which need to work but with the same target for two sources. Why won't the second (in the child UserControl) binding work?? Is there a way to acheive the behaviour I'm after?? Cheers.

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• Ninject Kernel Scope

  - by user326502

  I'm new to Ninject, and I was wondering if the scope of the kernel should be 1 per application. So should I treat the kernel as a singleton? Thanks.

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• Properties of bad fibonacci algorithm

  - by John Smith

  I was looking at the canonical bad fibonacci algorithm the other day: public static int fib(int n) { // Base Case if (n < 2) return 1; else return fib(n-1) + fib(n-2); } I made the interesting observation. When you call fib(n), then for k between 1 and n fib(k) is called precisely fib(n-k+1) times (or fib(n-k) depending on your definition of fib(0) ). Also, fib(0) is called fib(n-k-1) times. This then allows me to find that in fib(100) there are exactly 708449696358523830149 calls to the fib function. Are there other interesting observations on this function you know of?

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• TypeInitializeException on MVVM pattern

  - by Mohit Deshpande

  System.TypeInitializationException was unhandled Message=The type initializer for 'SmartHomeworkOrganizer.ViewModels.MainViewModel' threw an exception. Source=SmartHomeworkOrganizer TypeName=SmartHomeworkOrganizer.ViewModels.MainViewModel StackTrace: at SmartHomeworkOrganizer.ViewModels.MainViewModel..ctor() at SmartHomeworkOrganizer.App.OnStartup(Object sender, StartupEventArgs e) in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\SmartHomeworkOrganizer\SmartHomeworkOrganizer\App.xaml.cs:line 21 at System.Windows.Application.OnStartup(StartupEventArgs e) at System.Windows.Application.<.ctor>b__0(Object unused) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.DispatcherOperation.InvokeImpl() at System.Windows.Threading.DispatcherOperation.InvokeInSecurityContext(Object state) at System.Threading.ExecutionContext.runTryCode(Object userData) at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData) at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Windows.Threading.DispatcherOperation.Invoke() at System.Windows.Threading.Dispatcher.ProcessQueue() at System.Windows.Threading.Dispatcher.WndProcHook(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled) at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o) at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Boolean isSingleParameter) at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.WrappedInvoke(Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler) at System.Windows.Threading.Dispatcher.InvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Boolean isSingleParameter) at System.Windows.Threading.Dispatcher.Invoke(DispatcherPriority priority, Delegate method, Object arg) at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam) at MS.Win32.UnsafeNativeMethods.DispatchMessage(MSG& msg) at System.Windows.Threading.Dispatcher.PushFrameImpl(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.PushFrame(DispatcherFrame frame) at System.Windows.Threading.Dispatcher.Run() at System.Windows.Application.RunDispatcher(Object ignore) at System.Windows.Application.RunInternal(Window window) at System.Windows.Application.Run(Window window) at System.Windows.Application.Run() at SmartHomeworkOrganizer.App.Main() in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\SmartHomeworkOrganizer\SmartHomeworkOrganizer\obj\Debug\App.g.cs:line 0 at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args) at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args) at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly() at System.Threading.ThreadHelper.ThreadStart_Context(Object state) at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state) at System.Threading.ThreadHelper.ThreadStart() InnerException: System.ArgumentException Message=Default value type does not match type of property 'Score'. Source=WindowsBase StackTrace: at System.Windows.DependencyProperty.ValidateDefaultValueCommon(Object defaultValue, Type propertyType, String propertyName, ValidateValueCallback validateValueCallback, Boolean checkThreadAffinity) at System.Windows.DependencyProperty.ValidateMetadataDefaultValue(PropertyMetadata defaultMetadata, Type propertyType, String propertyName, ValidateValueCallback validateValueCallback) at System.Windows.DependencyProperty.RegisterCommon(String name, Type propertyType, Type ownerType, PropertyMetadata defaultMetadata, ValidateValueCallback validateValueCallback) at System.Windows.DependencyProperty.Register(String name, Type propertyType, Type ownerType, PropertyMetadata typeMetadata, ValidateValueCallback validateValueCallback) at System.Windows.DependencyProperty.Register(String name, Type propertyType, Type ownerType, PropertyMetadata typeMetadata) at SmartHomeworkOrganizer.ViewModels.MainViewModel..cctor() in C:\Users\Mohit\Documents\Visual Studio 2010\Projects\SmartHomeworkOrganizer\SmartHomeworkOrganizer\ViewModels\MainViewModel.cs:line 72 InnerException: This bit of code throws a System.ArgumentException before the TypeInitializeException. It says: "Default value type does not match type of property Score": public static readonly DependencyProperty ScoreProperty = DependencyProperty.Register("Score", typeof(float), typeof(MainViewModel), new UIPropertyMetadata(0.0)); Here is the .NET property: public float Score { get { return (float) GetValue(ScoreProperty); } set { SetValue(ScoreProperty, value); } }

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• UINavigationController does not set view properties correctly when pushed

  - by Sheehan Alam

  I have a UITabBarControllerDelegate that pushes a new view controller when a certain tab is pressed: - (void)tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController { MyView* myView = [[[MyView alloc] initWithNibName:@"MyView" bundle:nil]autorelease]; if([self.tabBarController.selectedViewController.title isEqualToString:@"Friends"]){ NSLog(@"Clicked Friends"); myView.reloadFriends = TRUE; [self.navigationController myView animated:YES]; } } However, if I change my code to set the tabbar's selected view controller to myView everything works, but I don't get my navigation bar: if([self.tabBarController.selectedViewController.title isEqualToString:@"Friends"]){ NSLog(@"Clicked Friends"); myView.reloadFriends = TRUE; self.tabBarController.selectedViewController = myView; } How can I set the reloadFriends property in MyView and have the navigation bar at the top?

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• Problem using delegates, static, and dependencyproperties

  - by red-X

  I'm trying to animate a private variable named radius, which works. However while its changing I'm trying to execute a function which is getting to be quite of a problem. the code i have is below, it wont run because it has the following error An object reference is required for the non-static field, method, or property 'AppPart.SetChildrenPosition()' specifically new SetChildrenPositionDelegate(SetChildrenPosition) this part in this sentance part.Dispatcher.BeginInvoke(new SetChildrenPositionDelegate(SetChildrenPosition), new Object()); thnx to anyone able to help me. class AppPart : Shape { public string name { get; set; } public List<AppPart> parts { get; set; } private double radius { get { return (double)GetValue(radiusProperty); } set { SetValue(radiusProperty, value); } } public static readonly DependencyProperty radiusProperty = DependencyProperty.Register( "radius", typeof(double), typeof(AppPart), new PropertyMetadata( new PropertyChangedCallback(radiusChangedCallback))); private delegate void SetChildrenPositionDelegate(); private void SetChildrenPosition() { //do something with radius } private static void radiusChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e) { AppPart part = d as AppPart; part.Dispatcher.BeginInvoke(new SetChildrenPositionDelegate(SetChildrenPosition), new Object()); } private void AnimateRadius(double start, double end) { DoubleAnimation ani = new DoubleAnimation(); ani.From = start; ani.To = end; ani.FillBehavior = FillBehavior.HoldEnd; ani.Duration = new Duration(new TimeSpan(0, 0, 0, 3, 0)); ani.Completed += delegate { Console.WriteLine("ani ended"); }; this.BeginAnimation(AppPart.radiusProperty, ani); } }

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• Injecting generics with Guice

  - by paradigmatic

  I am trying to migrate a small project, replacing some factories with Guice (it is my first Guice trial). However, I am stuck when trying to inject generics. I managed to extract a small toy example with two classes and a module: import com.google.inject.Inject; public class Console<T> { private final StringOutput<T> out; @Inject public Console(StringOutput<T> out) { this.out = out; } public void print(T t) { System.out.println(out.converter(t)); } } public class StringOutput<T> { public String converter(T t) { return t.toString(); } } import com.google.inject.AbstractModule; import com.google.inject.Guice; import com.google.inject.Injector; import com.google.inject.TypeLiteral; public class MyModule extends AbstractModule { @Override protected void configure() { bind(StringOutput.class); bind(Console.class); } public static void main(String[] args) { Injector injector = Guice.createInjector( new MyModule() ); StringOutput<Integer> out = injector.getInstance(StringOutput.class); System.out.println( out.converter(12) ); Console<Double> cons = injector.getInstance(Console.class); cons.print(123.0); } } When I run this example, all I got is: Exception in thread "main" com.google.inject.CreationException: Guice creation errors: 1) playground.StringOutput<T> cannot be used as a key; It is not fully specified. at playground.MyModule.configure(MyModule.java:15) 1 error at com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:354) at com.google.inject.InjectorBuilder.initializeStatically(InjectorBuilder.java:152) at com.google.inject.InjectorBuilder.build(InjectorBuilder.java:105) at com.google.inject.Guice.createInjector(Guice.java:92) I tried looking for the error message, but without finding any useful hints. Further on the Guice FAQ I stumble upon a question about how to inject generics. I tried to add the following binding in the configure method: bind(new TypeLiteral<StringOutput<Double>>() {}).toInstance(new StringOutput<Double>()); But without success (same error message). Can someone explain me the error message and provide me some tips ? Thanks.

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• Defining InputBindings within a Style

  - by Brent

  I'm creating a WPF app using the MVVM design pattern, and I'm trying to extend the TabItem control so that it closes the tab when the user clicks the middle mouse button. I'm trying to achieve this using InputBindings, and it works very well until I try to define it within a style. I've learned that you cannot add InputBindings to a style unless you attach it using a DependencyProperty. So I followed this similar post here... and it works... almost. I can close one tab using the middle mouse button, but it won't work on any of the other tabs (all of the tabs are added at runtime and inherit the same style). So I need some help. Why would this only be working the first time, and not after? Obviously I could create a custom control that inherits from a TabItem and make it work, but I'd like to figure this out as I can see this being expanded in my projects. I'm no expert on DependencyProperties, so please help me out. Thanks! Style: <Style TargetType="{x:Type TabItem}"> <Setter Property="w:Attach.InputBindings"> <Setter.Value> <InputBindingCollection> <MouseBinding MouseAction="MiddleClick" Command="{Binding CloseCommand}"/> </InputBindingCollection> </Setter.Value> </Setter> ... </Style> Class public class Attach { public static readonly DependencyProperty InputBindingsProperty = DependencyProperty.RegisterAttached("InputBindings", typeof(InputBindingCollection), typeof(Attach), new FrameworkPropertyMetadata(new InputBindingCollection(), (sender, e) => { var element = sender as UIElement; if (element == null) return; element.InputBindings.Clear(); element.InputBindings.AddRange((InputBindingCollection)e.NewValue); })); public static InputBindingCollection GetInputBindings(UIElement element) { return (InputBindingCollection)element.GetValue(InputBindingsProperty); } public static void SetInputBindings(UIElement element, InputBindingCollection inputBindings) { element.SetValue(InputBindingsProperty, inputBindings); } }

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• How to use NInject (or other DI / IoC container) with the model binder in ASP.NET MVC 2 ?

  - by Andrei Rinea

  Let's say I have an User entity and I would want to set it's CreationTime property in the constructor to DateTime.Now. But being a unit test adopter I don't want to access DateTime.Now directly but use an ITimeProvider : public class User { public User(ITimeProvider timeProvider) { // ... this.CreationTime = timeProvider.Now; } // ..... } public interface ITimeProvider { public DateTime Now { get; } } public class TimeProvider : ITimeProvider { public DateTime Now { get { return DateTime.Now; } } } I am using NInject 2 in my ASP.NET MVC 2.0 application. I have a UserController and two Create methods (one for GET and one for POST). The one for GET is straight forward but the one for POST is not so straight and not so forward :P because I need to mess with the model binder to tell it to get a reference of an implementation of ITimeProvider in order to be able to construct an user instance. public class UserController : Controller { [HttpGet] public ViewResult Create() { return View(); } [HttpPost] public ActionResult Create(User user) { // ... } } I would also like to be able to keep all the features of the default model binder. Any chance to solve this simple/elegant/etc? :D

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• Scheduling of SAS generated codes in SAS DI studio to IBM TWS

  - by tommy123

  Hi Guys, I`m sure some you might have used both SAS DI studio and IBM TWS. Has anone managed to run codes generated in SAS DI studio in TWS scheduler , What are the kind of issues you have faced? And it would be great if you could suggest possible solutions

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• WCF and Unity - Dependecy Injection

  - by Michael

  I'm trying to hock up WCF with dependecy injection. All the examples that I have found is based on the assumptions that you either uses a .svc (ServiceHostFactory) service or uses app.config to configure the container. Other examples is also based on that the container is passed around to the classes. I would like a solution where the container is not passed around (not tightly coupled to Unity). Where I don't uses a config file to configure the container and where I use self-hosted services. The problem is - as I see it - that the ServiceHost is taking the type of the service implementation as a parameter so what different does it do to use the InstanceProvider? The solution I have come up with at the moment is to register the ServiceHost (or a specialization) an register a Type with a name ( e.g. container.RegisterInstance<Type>("ServiceName", typeof(Service);). And then container.RegisterType<UnityServiceHost>(new InjectionConstructor(new ResolvedParameter<Type>("ServiceName"))); to register the ServiceHost. Any better solutions out there? I'm I perhaps way of in my assumptions. Best regards, Michael

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• How to approach ninject container/kernel in inheritance situation

  - by Bas

  I have the following situation: class RuleEngine {} abstract class RuleImplementation {} class RootRule : RuleImplementation {} class Rule1 : RuleImplementation {} class Rule2 : RuleImplementation {} The RuleEngine is injected by Ninject and has a kernel at it's disposal, the role of the RuleEngine is to fire off the root rule, which on it's turn will load all the other rules also using Ninject, but using a different Module and creating a new Kernel. Now my question is, some of the rules require some dependencies which I want to inject using Ninject. What would be the best way to create the kernel for these rules and also still do proper unit testing with it? (the kernel shouldn't become a real pain in my tests) I've been thinking of the following possibilitys: The kernel that I use in the RuleEngine class could be tossed around to RuleImplementation and thus be available for every rule. But tossing around Kernels isn't really something I wish to do. When creating the rules, I could give the kernel (which creates the rules) as a constructor argument for each rule. I could create a method inside the RuleImplementation which creates a kernel and makes it possible for the rules to retrieve the kernel using a get() in the abstract class Whats the convention of passing around/creating kernels? Just create new kernels, or reuse them?

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• Customizing Rails XML rendering to include extra properties

  - by Isaac Cambron

  Let's say I have a model like this: create_table :ninjas do |t| t.string name end And the Ninja class with an extra property: class Ninja < ActiveRecord::Base def honorific "#{name}san" end end And in my controller I just want to render it to XML: def show render :xml => Ninja.find(params[:id]) end The honorific part isn't rendered. That makes sense, since it's just a method, but is there a way of tricking it? I'm totally up for answers to the effect of, "You're doing this totally wrong." I'll just add that I really do want to calculate the honorific on the fly, and not, like, store it in the database or something.

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• Unity and Object Creation

  - by William

  I am using unity as my IoC container. I am trying to implement a type of IProviderRepository. The concrete implementation has a constructor that accepts a type of IRepository. When I remove the constructor parameter from the concrete implementation everything works fine. I am sure the container is wired correctly. When I try to create the concrete object with the constructor I receive the following error: "The current build operation (build key Build Key[EMRGen.Infrastructure.Data.IRepository1[EMRGen.Model.Provider.Provider], null]) failed: The current type, EMRGen.Infrastructure.Data.IRepository1[EMRGen.Model.Provider.Provider], is an interface and cannot be constructed. Are you missing a type mapping? (Strategy type BuildPlanStrategy, index 3)". Is it possible to achieve the above mention functionality with Unity? Namely have Unity infer a concrete type from the Interface and also inject the constructor of the concrete type with the appropriate concrete object based on constructor parameters. Below is sample of my types defined in Unity and a skeleton class listing for what I want to achieve. IProviderRepository is implemented by ProviderRepository which has a constructor that expects a type of IRepository. <typeAlias alias="ProviderRepositoryInterface" type="EMRGen.Model.Provider.IProviderRepository, EMRGen.Model" /> <typeAlias alias="ProviderRepositoryConcrete" type="EMRGen.Infrastructure.Repositories.Providers.ProviderRepository, EMRGen.Infrastructure.Repositories" /> <typeAlias alias="ProviderGenericRepositoryInterface" type="EMRGen.Infrastructure.Data.IRepository`1[[EMRGen.Model.Provider.IProvider, EMRGen.Model]], EMRGen.Infrastructure" /> <typeAlias alias="ProviderGenericRepositoryConcrete" type="EMRGen.Infrastructure.Repositories.EntityFramework.ApplicationRepository`1[[EMRGen.Model.Provider.Provider, EMRGen.Model]], EMRGen.Infrastructure.Repositories" /> <!-- Provider Mapping--> <typeAlias alias="ProviderInterface" type="EMRGen.Model.Provider.IProvider, EMRGen.Model" /> <typeAlias alias="ProviderConcrete" type="EMRGen.Model.Provider.Doctor, EMRGen.Model" /> //Illustrate the call being made inside my class public class PrescriptionService { PrescriptionService() { IUnityContainer uc = UnitySingleton.Instance.Container; UnityServiceLocator unityServiceLocator = new UnityServiceLocator(uc); ServiceLocator.SetLocatorProvider(() => unityServiceLocator); IProviderRepository pRepository = ServiceLocator.Current.GetInstance<IProviderRepository>(); } } public class GenericRepository<IProvider> : IRepository<IProvider> { } public class ProviderRepository : IProviderRepository { private IRepository<IProvider> _genericProviderRepository; //Explict public default constructor public ProviderRepository(IRepository<IProvider> genericProviderRepository) { _genericProviderRepository = genericProviderRepository; } }

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• Contructor parameters for dependent classes with Unity Framework

  - by Onisemus

  I just started using the Unity Application Block to try to decouple my classes and make it easier for unit testing. I ran into a problem though that I'm not sure how to get around. Looked through the documentation and did some Googling but I'm coming up dry. Here's the situation: I have a facade-type class which is a chat bot. It is a singleton class which handles all sort of secondary classes and provides a central place to launch and configure the bot. I also have a class called AccessManager which, well, manages access to bot commands and resources. Boiled down to the essence, I have the classes set up like so. public class Bot { public string Owner { get; private set; } public string WorkingDirectory { get; private set; } private IAccessManager AccessManager; private Bot() { // do some setup // LoadConfig sets the Owner & WorkingDirectory variables LoadConfig(); // init the access mmanager AccessManager = new MyAccessManager(this); } public static Bot Instance() { // singleton code } ... } And the AccessManager class: public class MyAccessManager : IAccessManager { private Bot botReference; public MyAccesManager(Bot botReference) { this.botReference = botReference; SetOwnerAccess(botReference.Owner); } private void LoadConfig() { string configPath = Path.Combine( botReference.WorkingDirectory, "access.config"); // do stuff to read from config file } ... } I would like to change this design to use the Unity Application Block. I'd like to use Unity to generate the Bot singleton and to load the AccessManager interface in some sort of bootstrapping method that runs before anything else does. public static void BootStrapSystem() { IUnityContainer container = new UnityContainer(); // create new bot instance Bot newBot = Bot.Instance(); // register bot instance container.RegisterInstance<Bot>(newBot); // register access manager container.RegisterType<IAccessManager,MyAccessManager>(newBot); } And when I want to get a reference to the Access Manager inside the Bot constructor I can just do: IAcessManager accessManager = container.Resolve<IAccessManager>(); And elsewhere in the system to get a reference to the Bot singleton: // do this Bot botInstance = container.Resolve<Bot>(); // instead of this Bot botInstance = Bot.Instance(); The problem is the method BootStrapSystem() is going to blow up. When I create a bot instance it's going to try to resolve IAccessManager but won't be able to because I haven't registered the types yet (that's the next line). But I can't move the registration in front of the Bot creation because as part of the registration I need to pass the Bot as a parameter! Circular dependencies!! Gah!!! This indicates to me I have a flaw in the way I have this structured. But how do I fix it? Help!!

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• NULL values in object properties in Entity Framework

  - by Tony

  Tables: Article, Author, Comment (1 article and 1 author can have * comments) In the database is 1 article, 1 author and 1 comment. The problem is, that code myBD my_bd = new myBD(); var articles = by_bd.Article; works OK, I can see that an Author and an Article has 1 comment. But that code var comm = (from u in my_bd.Comment where ...... select u); returns the comment but it has NULL values in property Article and Author. Why ?

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• Setting UINavigationbar properties in viewDidLoad does nothing

  - by erotsppa

  I've tried setting the style of the UINavigationbar to be a translucent style in the viewDidLoad method of my controller. But nothing is changed. Why? I set the property using the standard code like self.navigationController.navigationBar.barStyle = UIBarStyleBlackTranslucent;

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• Trouble using Loader, can't access properties of loaded swf

  - by anne

  May not have asked question correctly so I’m asking again. I’m using Flash AS3 with code in actions layer. Main movieclip onstage is : design_mc. Within it is a movieclip already in place onstage with an instance name clipart_mc. Now I’m also loading a ListBox to the stage and each time a selection is made from listbox myLoader9 is used to load selected .swf into design_mc.clipArt_mc. Now within each of the .swf files loaded into design_mc.clipArt_mc there is a mc I’d like to color transform called color_mc. So now the listbox is onstage and I make a selection that places heart.swf inside of design_mc.clipArt_mc. I want to access heart.swf so I did this: var child:DisplayObject = myLoader9.content.contentLoaderInfo.content.color_mc; var colorTrans3:ColorTransform = new ColorTransform(); var trans3:Transform = new Transform(child); I still can not get to heart.swf. Can anyone help please? Anne

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• Embedding JARs into the OSGi bundle with maven-bundle-plugin

  - by Ivan Dubrov

  I’m trying to embed some JARs into single OSGi bundle using the feature of maven-bundle-plugin The thing that worries me is that all packages of embedded JARs are put into the Import-Package header of the generated MANIFEST.MF. If I specify explicitly to use only the packages I need, like in the following snippet: Import-Package: org.osgi.framework The build fails with BND error (unresolved references). So, the question here is how can I build the bundle with embedded JARs with "Import-Package" header I need?

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• MEF = may experience frustration?

  - by Dave

  Well, it's not THAT bad yet. :) But I do have questions after Reed has pointed me at MEF as a potential alternative to IoC (and so far it does look pretty good). Consider the following model: As you can see, I have an App, and this app uses Plugins (whoops, missed that association!). Both the App and Plugins require usage of an object of type CandySettings, which is found in yet another assembly. I first tried to use the ComposeParts method in MEF, but the only way I could get this to work was to do something like this in the plugin code. var container = new CompositionContainer(); container.ComposeParts(this, new CandySettings()); But this doesn't make any sense, because why would I want to create the instance of CandySettings in the plugin? It should be in the App. But if I put it in the App code, then the Plugin doesn't magically figure out how to get at ICandySettings, even though I am using [Import] in the plugin, and [Export] in CandySettings. The way I did it was to use MEF's DirectoryCatalog, because this allows the plugin, when constructed, to scan all of the assemblies in the current folder and automagically import everything that is marked with the [Import] attribute. So it looks like this, and potentially in every plugin: var catalog = new DirectoryCatalog( "."); var container = new CompositionContainer( catalog); container.ComposeParts( this); This totally works great, but I can't help but think that this is not how MEF was intended to be used?

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• Displaying FontFamily in Combobox

  - by Torsten

  Hi. My goal is to manipulate the text-styles of my application via DependencyProperties. I got a diagram in which the texts are to be manipulated in size, fontfamily, color, etc. So I'd like to use an interface similar to a rich text editor like Word. I'm using this code in my TextStyleVM http://shevaspace.blogspot.com/2006/12/i-have-some-fun-with-formattedtext_14.html So I have a FontFamilyProperty and a Getter and Setter for it: public static DependencyProperty FontFamilyProperty = DependencyProperty.Register( "FontFamily", typeof(FontFamily), typeof(OutlinedText), new FrameworkPropertyMetadata( SystemFonts.MessageFontFamily, FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure), new ValidateValueCallback(IsValidFontFamily)); public FontFamily FontFamily { get { return (FontFamily)base.GetValue(FontFamilyProperty); } set { base.SetValue(FontFamilyProperty, value); } } Then there is a ToStyle method, which sets the style for the labels of the diagram, which are to be manipulated: Style style = new Style(); Binding fontFamilyBinding = new Binding("FontFamily"); fontFamilyBinding.Source = this; Setter fontFamilySetter = new Setter(); fontFamilySetter.Property = TextBlock.FontFamilyProperty; fontFamilySetter.Value = fontFamilyBinding; style.Setters.Add(fontFamilySetter); return style; Now this works for a TextBox. The textbox displays the current FontFamily, and if I enter a new, valid FontFamily like Arial into the textbox the FontFamily of the labels are changed. However, what I'd like to have is a combobox, which displays the SystemFonts and where I can choose one FontFamily for my labels. However, the binding doesn't seem to work. Neither the system fonts nor the current fonts of the labels are displayed. The combobox is just empty. This is my xaml: <r:RibbonLabel Content="FontFamily" /> <!--these do not work--> <r:RibbonComboBox SelectedItem="{Binding FontFamily}"/> <r:RibbonComboBox ItemsSource="{Binding FontFamily}"/> <!--this works--> <r:RibbonTextBox Text="{Binding FontFamily}"/> Now, I assume I have to set a different Setter for a ComboBox in the ToStyle Method. But I have no clue, which one. Maybe someting like this: fontFamilySetter.Property = ComboBox.ItemSource; However, if I set that Property, the TextBox still works. So is this the wrong place to start at? I'd also be grateful if someone could hint me to some documentation about using these Style-, Setter-, Binding-key-words, which are used in the ToStyle method, since this is somebody elses code I'm working with.

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