I'm attempting to get SignalR working in a Nop Commerce plugin. I've installed the NuGet package and have written my Startup class but the Startup class is never being called. Here is my code:
using System;
using System.Threading.Tasks;
using Microsoft.Owin;
using Owin;
[assembly: OwinStartup(typeof(Nop.Plugin.Misc.CAImport.Infrastructure.Startup))]
namespace Nop.Plugin.Misc.CAImport.Infrastructure
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
app.MapSignalR();
}
}
}
I am using Nop 3.50 and it is necessary to add NuGet package Microsoft.Owin.Host.SystemWeb 2.1.0 in order to trigger the Startup class.
Related
I am using Shiny for xamarin to schedule background jobs.
I am trying to call my startup class from my mainApplication class but AndroidShinyHost is not available. My Target is Android 10.
I used the following sample
https://github.com/shinyorg/samples/tree/main/Jobs
MainApplication.CS
using System;
using Shiny;
using Android.App;
using Android.Runtime;
namespace Inventory.Droid
{
[Application]
public class MainApplication : Application
{
public MainApplication(IntPtr handle, JniHandleOwnership ownerShip) : base(handle, ownerShip)
{
}
public override void OnCreate()
{
base.OnCreate();
Shiny.AndroidShinyHost.Init(this, new Startup()); //Not available
}
}
}
I have a .Net Core 3 Web App using Razor pages. I was messing with solution explorer a few days ago and now I notice I'm missing startup.cs and program.cs. How can I restore them? I'm also getting this error: "Unable to run your project. The RunCommand property is not defined".
First I'd check to make sure your files are in the project directory before trying to rebuild them. If they are still in the directory you can add them to your solution using Visual Studio.
Right click the project > Add > Existing item...
If you don't have those files and can't find them, then recreate them. Here's the default code for them.
Startup.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
namespace NOCng
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddRazorPages();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Error");
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapRazorPages();
});
}
}
}
Program.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
namespace NOCng
{
public class Program
{
public static void Main(string[] args)
{
CreateHostBuilder(args).Build().Run();
}
public static IHostBuilder CreateHostBuilder(string[] args) =>
Host.CreateDefaultBuilder(args)
.ConfigureWebHostDefaults(webBuilder =>
{
webBuilder.UseStartup<Startup>();
});
}
}
In our application, I have used Visual Studio 2017 .NET Core 2. I have implemented dependency injection in a Web project Startup.cs class. I have to implement the same in a new test project. How can I inject dependencies of repositories in the test project?
Please see the below code snippet
using Microsoft.AspNetCore;
using Microsoft.AspNetCore.Hosting;
using NLog.Web;
namespace Kpmg.Kdat.Data.Services.Directory.Tests
{
public class Program
{
public static void Main(string[] args)
{
BuildWebHost(args).Run();
}
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseStartup<Startup>()
.UseNLog()
.Build();
}
}
The purpose of the above code is to inject dependencies. In Startup.cs I have configured all the dependencies.
While using the above code I am getting the below error:
Error CS0017 Program has more than one entry point defined. Compile with /main to specify the type that contains
the entry point.
How can I fix the issue?
Why do you want to include the above in your unit test project? Generally, you shouldn't have to.
If you want mock dependencies, in your unit test project you can do something like this.
public class TestServiceModule : Module
{
protected override void Load(ContainerBuilder builder)
{
builder.Register(ctx =>
{
// Return mock implementation of IMyService
}).As<IMyService>()
.SingleInstance();
// Register your mock services like above
}
}
And use like,
[TestInitialize]
public void Initialize()
{
var builder = new ContainerBuilder();
builder.RegisterModule<TestServiceModule>();
}
Now you can use IMyService.
I am new to .Net and SignalR. I am looking at some code written by a former coworker and he added this line to the Route Config which is now throwing errors saying its obsolete but all the documentation I have read suggest mapping connections in this way.
namespace FailureInvestigationToolbox {
public class RouteConfig {
public static void RegisterRoutes( RouteCollection routes ) {
routes.IgnoreRoute( "{resource}.axd/{*pathInfo}" );
routes.MapRoute(
name :"Default",
url :"{controller}/{action}/{id}",
defaults :new {
controller = "fit",
action = "Index",
id = UrlParameter.Optional
}
);
RouteTable.Routes.MapConnection<TaskListPersistence>("taskpersist", "/taskpersist");
}
}
}
The error is:
System.Web.Routing.SignalRRouteExtensions.MapConnection<T>
(System.Web.Routing.RouteCollection, string, string)' is obsolete:
'Use IAppBuilder.MapSignalR<TConnection> in an Owin Startup class. See
http://go.microsoft.com/fwlink/?LinkId=320578 for more details.'
C:\fit\FailureInvestigationToolbox\App_Start\RouteConfig.cs
Is it possible I have something wrong with my SignalR installation or is the IAppBuilder way of mapping things what I'm supposed to do...if so how?
I am using SignalR 2.0.3
You can use this article ,
1.In the global application class, remove the call to MapHubs.
protected void Application_Start(object sender, EventArgs e)
{
RouteTable.Routes.MapHubs();
}
2.Right-click the solution, and select Add, New Item.... In the dialog, select Owin Startup Class. Name the new class Startup.cs.
3.Replace the contents of Startup.cs with the following code:
using Microsoft.Owin;
using Owin;
[assembly: OwinStartup(typeof(SignalRChat.Startup))]
namespace SignalRChat
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
app.MapSignalR();
}
}
}
Yes, you have to use IAppBuilder. Add a Owin Startup class, and in its Configuration method call MapConnection<T> on the app argument you receive. That should work. Check here and here.
To enable SignalR in your application, create a class called Startup with the following:
using Owin;
namespace MyWebApplication
{
public class Startup
{
public void Configuration(IAppBuilder app)
{
app.MapSignalR();
}
}
}
i have setup my project with Ninject IoC.
My project has regular Asp.Net MVC controllers and Web Api controllers. Now, Ninject works with Web Api but Ninject doesn't work with regular Asp.MVC controllers.
My regular MVC controller implementation;
public class GalleryController : BaseController
{
public GalleryController(IUow uow)
{
Uow = uow;
}
........
}
Error when using with regular controller
An error occurred when trying to create a controller of type 'Web.Controllers.HomeController'. Make sure that the controller has a parameterless public constructor.]
However, when i try the same code with Web Api, it works
public class GalleryController : BaseApiController
{
public GalleryController(IUow uow)
{
Uow = uow;
}
......
}
my interface which holds difference repositories (the factory pattern)
public interface IUow
{
// Save pending changes to the data store.
void Commit();
//Repositoryries
IRepository<Gallery> Gallery { get; }
IMenuRepository Menus { get; }
}
NinjectDependencyScope class;
public class NinjectDependencyScope : IDependencyScope
{
private IResolutionRoot resolver;
internal NinjectDependencyScope(IResolutionRoot resolver)
{
Contract.Assert(resolver != null);
this.resolver = resolver;
}
public void Dispose()
{
var disposable = resolver as IDisposable;
if (disposable != null)
disposable.Dispose();
resolver = null;
}
public object GetService(Type serviceType)
{
if (resolver == null)
throw new ObjectDisposedException("this", "This scope has already been disposed");
return resolver.TryGet(serviceType);
}
public IEnumerable<object> GetServices(Type serviceType)
{
if (resolver == null)
throw new ObjectDisposedException("this", "This scope has already been disposed");
return resolver.GetAll(serviceType);
}
}
NinjectDependencyResolver class;
public class NinjectDependencyResolver : NinjectDependencyScope, IDependencyResolver
{
private IKernel kernel;
public NinjectDependencyResolver(IKernel kernel)
: base(kernel)
{
this.kernel = kernel;
}
public IDependencyScope BeginScope()
{
return new NinjectDependencyScope(kernel.BeginBlock());
}
}
Ninject configuration for Global.asax;
public class IocConfig
{
public static void RegisterIoc(HttpConfiguration config)
{
var kernel = new StandardKernel(); // Ninject IoC
//kernel.Load(Assembly.GetExecutingAssembly()); //only required for asp.net mvc (not for webapi)
// These registrations are "per instance request".
// See http://blog.bobcravens.com/2010/03/ninject-life-cycle-management-or-scoping/
kernel.Bind<RepositoryFactories>().To<RepositoryFactories>()
.InSingletonScope();
kernel.Bind<IRepositoryProvider>().To<RepositoryProvider>();
kernel.Bind<IUow>().To<Uow>();
// Tell WebApi how to use our Ninject IoC
config.DependencyResolver = new NinjectDependencyResolver(kernel);
}
}
Global.asax
protected void Application_Start()
{
// Tell WebApi to use our custom Ioc (Ninject)
IocConfig.RegisterIoc(GlobalConfiguration.Configuration);
FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
GlobalConfig.CustomizeConfig(GlobalConfiguration.Configuration);
AreaRegistration.RegisterAllAreas();
}
I have written some gists to help configure Ninject with MVC and Web Api. Simply include the file(s):
https://gist.github.com/odytrice/5821087 (for MVC)
https://gist.github.com/odytrice/5842010 (for WebApi)
To add Bindings for concrete Types, Just put them in the Load() method of the MainModule. You can create as many modules as you like to keep bindings organized. but you'll also have to add them to the array that is returned in the Modules property.
Then Add to the Application_Start() method
NinjectContainer.RegisterModules(NinjectModules.Modules) (for MVC)
NinjectHttpContainer.RegisterModules(NinjectHttpModules.Modules) (for WebApi)
Note that you can use the same NinjectModules.Modules for both the MVC and WebApi registration. I just separated it for clearity
UPDATE: Remember to Remove NinjectWebCommon.cs from your project as it loads and bootstraps a new kernel at Runtime which unfortunately is only for MVC.
UPDATE: You can also use
NinjectContainer.RegisterAssembly() (for MVC)
NinjectHttpContainer.RegisterAssembly() (for WebApi)
This will scan your current assembly for all modules. This way you can put your modules anywhere in your project and it will be registered
With MVC 5 and Web API 2.2 I solved this problem by making sure I included the following NuGet packages:
Ninject.MVC5
Ninject.Web.WebApi.WebHost for Web API
This installed other Ninject dependencies and allowed me to RegisterServices through NinjectWebCommon.cs.
After searching a lot, it turns out there we can't use Ninject with web api and regular mvc. I mean, we have to configure the Repositories separately.
I then found a nice article which explains how you can use Ninject with asp.net mvc & web api: http://www.codeproject.com/Articles/412383/Dependency-Injection-in-asp-net-mvc4-and-webapi-us
And now, I don't get the error and it's working :D
Update 1:
Also try Writing a simple implementation of dependency injection in MVC 4 Web API with .NET Framework 4.5
Here is the simple solution that works fine for me:
In Visual studio, create new web application project named DemoApp and make sure you have selected Empty template with MVC and Web API references:
In Package manager console execute one by one:
Install-Package Ninject
Install-Package Ninject.MVC5
Add NinjectDependencyResolver.cs to IoC folder :
using Ninject;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http.Dependencies;
namespace DemoApp.IoC
{
public class NinjectDependencyResolver : IDependencyResolver, System.Web.Mvc.IDependencyResolver
{
private readonly IKernel kernel;
public NinjectDependencyResolver(IKernel kernel)
{
this.kernel = kernel;
}
public IDependencyScope BeginScope()
{
return this;
}
public object GetService(Type serviceType)
{
return kernel.TryGet(serviceType);
}
public IEnumerable<object> GetServices(Type serviceType)
{
return kernel.GetAll(serviceType);
}
public void Dispose() { } //it is not necessary to implement any dispose logic here
}
}
Make the following changes in App_Start/NinjectWebCommon.cs :
Add these lines in CreateKernel method:
NinjectDependencyResolver ninjectResolver = new NinjectDependencyResolver(kernel);
DependencyResolver.SetResolver(ninjectResolver); //MVC
GlobalConfiguration.Configuration.DependencyResolver = ninjectResolver; //Web API
Add your bindings in RegisterServices method like:
kernel.Bind< IHelloService>().To< HelloService>();
Now NinjectWebCommon.cs should look like:
[assembly: WebActivatorEx.PreApplicationStartMethod(typeof(DemoApp.App_Start.NinjectWebCommon), "Start")]
[assembly: WebActivatorEx.ApplicationShutdownMethodAttribute(typeof(DemoApp.App_Start.NinjectWebCommon), "Stop")]
namespace DemoApp.App_Start
{
using System;
using System.Web;
using Microsoft.Web.Infrastructure.DynamicModuleHelper;
using Ninject;
using Ninject.Web.Common;
using DemoApp.IoC;
using System.Web.Mvc;
using System.Web.Http;
using DemoApp.Config;
public static class NinjectWebCommon
{
private static readonly Bootstrapper bootstrapper = new Bootstrapper();
/// <summary>
/// Starts the application
/// </summary>
public static void Start()
{
DynamicModuleUtility.RegisterModule(typeof(OnePerRequestHttpModule));
DynamicModuleUtility.RegisterModule(typeof(NinjectHttpModule));
bootstrapper.Initialize(CreateKernel);
}
/// <summary>
/// Stops the application.
/// </summary>
public static void Stop()
{
bootstrapper.ShutDown();
}
/// <summary>
/// Creates the kernel that will manage your application.
/// </summary>
/// <returns>The created kernel.</returns>
private static IKernel CreateKernel()
{
var kernel = new StandardKernel();
try
{
kernel.Bind<Func<IKernel>>().ToMethod(ctx => () => new Bootstrapper().Kernel);
kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>();
RegisterServices(kernel);
NinjectDependencyResolver ninjectResolver = new NinjectDependencyResolver(kernel);
DependencyResolver.SetResolver(ninjectResolver); //MVC
GlobalConfiguration.Configuration.DependencyResolver = ninjectResolver; //Web API
return kernel;
}
catch
{
kernel.Dispose();
throw;
}
}
/// <summary>
/// Load your modules or register your services here!
/// </summary>
/// <param name="kernel">The kernel.</param>
private static void RegisterServices(IKernel kernel)
{
kernel.Bind<IHelloService>().To<HelloService>();
}
}
}
Just for the completeness of the example, add some Mvc and Api controllers, and code for IHelloService, HelloService :
HomeController.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using DemoApp.Config;
namespace DemoApp.Controllers
{
public class HomeController : Controller
{
private IHelloService helloService;
public HomeController(IHelloService helloService)
{
this.helloService = helloService;
}
// GET: /Home/
public string Index()
{
return "home/index: " + helloService.GetMessage();
}
}
}
UserController.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http;
using DemoApp.Config;
namespace DemoApp.Controllers
{
public class UserController : ApiController
{
private IHelloService helloService;
public UserController(IHelloService helloService)
{
this.helloService = helloService;
}
[HttpGet]
public string Data()
{
return "api/user/data: " + helloService.GetMessage();
}
}
}
IHelloService.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace DemoApp.Config
{
public interface IHelloService
{
string GetMessage();
}
}
HelloService.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
namespace DemoApp.Config
{
public class HelloService : IHelloService
{
public string GetMessage()
{
return "Hi";
}
}
}
The final structure should look like:
Now make some tests in browser. For me it was:
http://localhost:51156/home/index
http://localhost:51156/api/user/data
And that's it.
I think the issue is that you are not registering a ControllerFactory that uses Ninject to build the controllers (and resolve their dependencies), have you tried implementing your own ControllerFactory yet? See also here http://bubblogging.wordpress.com/2012/06/04/mvc-controller-factory-ninject/.
There is a more elegant solution for this by Nenad - it took me 3 extra hours because I first tried to implement the solutions here conflicting with existing infrastructure I had. It is in reply to another stack overflow question. I am duplicating that answer here just in case it helps others to save the time I lost.
There is a way to share same container between MVC and ASP.NET Web API.
You just need to implement both interfaces.
public class NinjectDependencyResolver : NinjectDependencyScope, IDependencyResolver, System.Web.Mvc.IDependencyResolver
{
private readonly IKernel kernel;
public NinjectDependencyResolver(IKernel kernel)
: base(kernel)
{
this.kernel = kernel;
}
public IDependencyScope BeginScope()
{
return new NinjectDependencyScope(this.kernel.BeginBlock());
}
}
Check this article for solution:
Simple Way to share Dependency Resolvers between MVC and Web API