I want to deep clone a generic list but icloneable interface is not present in windows phone 8.1 also binaryformatter class is also not present?
Try this
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
public static T DeepClone<T>(T obj)
{
using (var ms = new MemoryStream())
{
var formatter = new BinaryFormatter();
formatter.Serialize(ms, obj);
ms.Position = 0;
return (T) formatter.Deserialize(ms);
}
}
Your class MUST be marked as [Serializable] in order for this to work.
Your source file must include the following code:
If you want clone all members and then refer this Deep Copy of Object in C#
You can create your own icloneable interface and define a function as follows:
public interface IClonable<T>
{
T Clone();
}
public static T[] Clone<T>(this T[] origin) where T : IClonable<T>
{
return origin.Select(x => x.Clone()).ToArray();
}
Related
I have gotten a task that contains creating a .Net 4.8 application that contains a "HttpSelfHostServer".
I'm stuck in the quest of assigning "IServiceCollection services" to config.DependencyResolver (of type System.Web.Http.Dependencies.IDependencyResolver)
I would really like not to use autofac or other frameworks, but all guids I can find are pointing toward these frameworks. Isn't Microsoft providing a way through?
I just had to solve the same issue. This is how i did it:
First I created a new facade class to map the IServiceCollection from the host builder to the interface HttpSelfHostConfiguration supports:
using System;
using System.Collections.Generic;
using System.Web.Http.Dependencies;
using Microsoft.Extensions.DependencyInjection;
namespace IntegrationReceiver.WebApi
{
public class HttpSelfHostDependencyResolver : IDependencyResolver
{
private readonly IServiceProvider sp;
private readonly IServiceScope scope;
public HttpSelfHostDependencyResolver(IServiceProvider sp)
{
this.sp = sp;
this.scope = null;
}
public HttpSelfHostDependencyResolver(IServiceScope scope)
{
this.sp = scope.ServiceProvider;
this.scope = scope;
}
public IDependencyScope BeginScope() => new HttpSelfHostDependencyResolver(sp.CreateScope());
public void Dispose() => scope?.Dispose();
public object GetService(Type serviceType) => sp.GetService(serviceType);
public IEnumerable<object> GetServices(Type serviceType) => sp.GetServices(serviceType);
}
}
This required me to get the latest NuGet package Microsoft.Extensions.DependencyInjection.Abstractions according to an answer here: How do I see all services that a .NET IServiceProvider can provide?
I then registered my HttpSelfHostServer in the service provider with this code:
services.AddSingleton(sp => new HttpSelfHostDependencyResolver(sp));
services.AddSingleton(sp =>
{
//Starting the HttpSelfHostServer with user-level permissions requires to first run a command like
// netsh http add urlacl url=http://+:8080/ user=[DOMAINNAME]\[USERNAME]
var config = new HttpSelfHostConfiguration("http://localhost:8080");
config.Routes.MapHttpRoute("API Default", "api/{controller}/{id}", new { id = RouteParameter.Optional });
config.DependencyResolver = sp.GetRequiredService<HttpSelfHostDependencyResolver>();
return new HttpSelfHostServer(config);
});
And finally, to find my ApiController, I had to register that too in the service provider. I did that simply with:
services.AddScoped<HealthCheckController>();
For brewity, I'm just including my api controller below to illustrate how it now gets its dependencies:
using System.Net.Http;
using System.Threading.Tasks;
using System.Web.Http;
namespace IntegrationReceiver.WebApi
{
public class HealthCheckController : ApiController
{
private readonly ServiceBusRunner serviceBusRunner;
public HealthCheckController(ServiceBusRunner serviceBusRunner)
{
this.serviceBusRunner = serviceBusRunner;
}
[HttpGet]
public async Task<HttpResponseMessage> Get()
{
var response = new
{
serviceBusRunner.RunningTasks,
serviceBusRunner.MaxRunningTasks
};
return await Json(response)
.ExecuteAsync(System.Threading.CancellationToken.None);
}
}
}
This is a pretty dumb-down implementation but works for me until I can upgrade this code to net5.
I hope it helps you too!
In ASP.NET Core, I need to fetch the content value from the namespace Microsoft.AspNetCore.Mvc.Razor.HelperResult and assign the value in a variable but its assigning the namespace to that variable.
It works fine in MVC when i use namespace System.Web.WebPages.HelperResult and assign that content to variable. (Content are some html elements).
Please, check the picture to find the issue.
My code:
Variable with namespace name as value
In .NET Core HelperResult returns IHtmlContent instead of IHtmlString.
For IHtmlContent it might be convenient to use an extension like the one mentioned here:
public static IHtmlContent GetList(this IHtmlHelper helper)
{
var listHtml = new HtmlContentBuilder();
listHtml.AppendHtml("<ol><li>");
listHtml.AppendHtml(helper.ActionLink("foo", "bar", "example"));
listHtml.AppendHtml("</li></ol>");
return listHtml;
}
Try this (since HelperResult implements IHtmlContent interface):
public static string ToHtmlString(this IHtmlHelper source, IHtmlContent htmlContent)
{
var sb = new StringBuilder();
using (TextWriter tw = new StringWriter(sb))
{
var encoder = (HtmlEncoder)source.ViewContext.HttpContext.RequestServices.GetService(typeof(HtmlEncoder));
htmlContent.WriteTo(tw, encoder);
}
return sb.ToString();
}
and call this method in your Razor view like this:
#Html.ToHtmlString(helperResultObject)
I am creating console application that does some file conversions. These conversions are easily done creating a model from the input file and then executing razor models for the output.
To have this working in the IDE I used Visual Studio 2015 preview and created a vnext console application that uses MVC. (You get razor support out of the box then). To get this all working you need to host the MVC app though, and the cheapest way to do that is hosting is through a WebListener. So I host the MVC app and then call it through "http://localhost:5003/etc/etc" to get the rendered views that construct the output.
But the console app is not supposed to listen to/use a port. It is just a command line tool for file conversions. If multiple instances would run at the same time they would fight to host the pages on the same port. (This could of coarse be prevented by choosing a port dynamically, but this is not what I am looking for)
So my question is how would you get this working without using a port, but using as much of the vnext frameworks as possible.
In short: how can I use cshtml files that I pass models in a console app that does not use a port using the vnext razor engine.
Here is some code I currently use:
Program.cs
using Microsoft.AspNet.Hosting;
using Microsoft.AspNet.Http;
using Microsoft.AspNet.Mvc;
using Microsoft.Framework.ConfigurationModel;
using Microsoft.Framework.DependencyInjection;
using Microsoft.Framework.DependencyInjection.Fallback;
using System;
using System.IO;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading;
using System.Threading.Tasks;
using System.Xml.Linq;
namespace ConsoleTest
{
public class Program
{
private readonly IServiceProvider _hostServiceProvider;
public Program(IServiceProvider hostServiceProvider)
{
_hostServiceProvider = hostServiceProvider;
}
public async Task<string> GetWebpageAsync()
{
using (var httpClient = new HttpClient())
{
httpClient.BaseAddress = new Uri("http://localhost:5003/home/svg?idx=1");
httpClient.DefaultRequestHeaders.Accept.Clear();
httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("text/xml"));
return await httpClient.GetStringAsync("");
}
}
public Task<int> Main(string[] args)
{
var config = new Configuration();
config.AddCommandLine(args);
var serviceCollection = new ServiceCollection();
serviceCollection.Add(HostingServices.GetDefaultServices(config));
serviceCollection.AddInstance<IHostingEnvironment>(new HostingEnvironment() { WebRoot = "wwwroot" });
var services = serviceCollection.BuildServiceProvider(_hostServiceProvider);
var context = new HostingContext()
{
Services = services,
Configuration = config,
ServerName = "Microsoft.AspNet.Server.WebListener",
ApplicationName = "ConsoleTest"
};
var engine = services.GetService<IHostingEngine>();
if (engine == null)
{
throw new Exception("TODO: IHostingEngine service not available exception");
}
using (engine.Start(context))
{
var tst = GetWebpageAsync();
tst.Wait();
File.WriteAllText(#"C:\\result.svg", tst.Result.TrimStart());
Console.WriteLine("Started the server..");
Console.WriteLine("Press any key to stop the server");
Console.ReadLine();
}
return Task.FromResult(0);
}
}
}
Startup.cs
using Microsoft.AspNet.Builder;
using Microsoft.Framework.DependencyInjection;
using Microsoft.AspNet.Routing;
using Microsoft.Framework.ConfigurationModel;
namespace ConsoleTest
{
public class Startup
{
public IConfiguration Configuration { get; private set; }
public void ConfigureServices(IServiceCollection services)
{
// Add MVC services to the services container
services.AddMvc();
}
public void Configure(IApplicationBuilder app)
{
//Configure WebFx
app.UseMvc(routes =>
{
routes.MapRoute(
null,
"{controller}/{action}",
new { controller = "Home", action = "Index" });
});
}
}
}
I solved it using the following code:
Program.cs
using System;
using System.Threading.Tasks;
using Microsoft.AspNet.TestHost;
using Microsoft.AspNet.Builder;
using Microsoft.Framework.Runtime.Infrastructure;
namespace ConsoleTest
{
public class Program
{
private Action<IApplicationBuilder> _app;
private IServiceProvider _services;
public async Task<string> TestMe()
{
var server = TestServer.Create(_services, _app);
var client = server.CreateClient();
return await client.GetStringAsync("http://localhost/home/svg?idx=1");
}
public void Main(string[] args)
{
_services = CallContextServiceLocator.Locator.ServiceProvider;
_app = new Startup().Configure;
var x = TestMe();
x.Wait();
Console.WriteLine(x.Result);
Console.ReadLine();
}
}
}
Startup.cs
using Microsoft.AspNet.Builder;
using Microsoft.Framework.DependencyInjection;
using Microsoft.AspNet.Routing;
namespace ConsoleTest
{
public class Startup
{
public void Configure(IApplicationBuilder app)
{
app.UseServices(services =>
{
// Add MVC services to the services container
services.AddMvc();
});
//Configure WebFx
app.UseMvc(routes =>
{
routes.MapRoute(
null,
"{controller}/{action}",
new { controller = "Home", action = "Index" });
});
}
}
}
The architecture: Win8 app + local Web API Self-Host share a common "Contracts" project.
The Web API returns very general contract types (IEnumerable etc.).
Within the Win8 app I want to convert these contracts to concrete MVVM compatible model objects which use ObservableCollection for example instead of IEnumerables.
I would have loved to use AutoMapper for this task but it is not compatible with the WinRT.
I used AutoMapper some time ago, but now I generally use a specific class to do this work so I can test it and implement "strange" logic. This class is responsible for the mapping in the 2 direction (if both are needed).
Sometimes, because I'm lazy ;-), I have used an implicit conversion operator to simplify the conversion, but I think that conceptually a constructor for the dto could be better:
public class ItemDto
{
public Int32 Id { get; set; }
public String Description { get; set; }
public static implicit operator ItemDto (Item item)
{
var dto = new ItemDto()
{
Id = item.Id,
Description = item.LongDescription
};
return dto;
}
In all these cases, I think that the possibility to test your mapping has a great value.
You can to use reflection ( System.Reflection) for mapper yours DTOs by yourself, in a loop by the properties and mapping using the portable CLR types.
Thank you for your suggestions.
I solved it in a non-generic fashion, for every model I do have a specific converter that does the job. What do you think?
using Project.Contracts;
using Project.Models;
namespace Project.Converters.Contracts
{
public static class ProductConverter
{
public static ProductContract ToContract(this Product model)
{
if (model == null)
{
return new ProductContract();
}
return new ProductContract
{
Id = model.Id,
Name = mode.Name,
Tags = model.Tags.ToContracts()
};
}
public static ICollection<ProductContract> ToContracts(this IEnumerable<Product> models)
{
if (models == null)
{
return new Collection<ProductContract>();
}
return models.Select(m => m.ToContract()).ToList();
}
public static Product ToModel(this ProductContract contract)
{
if (contract == null)
{
return new Product();
}
return new Product
{
Id = contract.Id,
Name = contract.Name,
Tags = contract.Tags.ToModels()
};
}
public static ObservableCollection<Product> ToModels(this IEnumerable<ProductContract> contracts)
{
if (contracts == null)
{
return new ObservableCollection<Product>();
}
return new ObservableCollection<Product>(contracts.Select(c => c.ToModel()));
}
}
}
My colleague set up a Windsor TypedFactoryFacility in our project.
I'm new to Windsor and don't understand how it is implementing the the methods in the IServiceFactory interface we register as a factory. When I saw a Create method that takes a type parameter T and returns a T, I figured that it's probably calling the container's Resolve method under the covers.
I need an overload of Create that takes a Type as a parameter and returns an object. Since the container's Resolve method has both of these flavors:
T Resolve<T>(string key);
object Resolve(Type service);
I thought adding the overload of Create would work. Instead, it appears to be trying to resolve a System.Object instead of the Type I pass in.
Is there a way to make Windsor implement my Create method the way I want it to? I've poked around a bit with reflector, but can't figure it out.
Here is the registration:
container.AddFacility<TypedFactoryFacility>();
container.Register(
Component.For<IServiceFactory>()
.AsFactory()
.LifeStyle.Transient);
and the interface itself:
public interface IServiceFactory
{
//Original Create method that works
T Create<T>();
//The overload that I need that throws an exception
object Create(Type service)
void Release(object service);
}
Do you want to call something like serviceFactory.Create(typeof(IMyServce)) instead of serviceFactory.Create<IMyService>()?
Try using reflection in an extension method, like this
public static class ServiceFactoryExtensions
{
public static object Create(this IServiceFactory factory, Type serviceType)
{
return typeof(IServiceFactory).GetMethod("Create")
.MakeGenericMethod(serviceType).Invoke(factory, new object[]{});
}
}
EDIT:
This extension method does indeed work with a factory created by Castle Windsor.
Here's my original test code, which you can drop into Program.cs of a VS2010 console application, add a reference to Castle.Core and Castle.Windsor, and run. I used Castle.Windsor 2.5.4.
using System;
using Castle.Facilities.TypedFactory;
using Castle.MicroKernel.Registration;
using Castle.Windsor;
namespace StackOverflow9198461
{
public static class ServiceFactoryExtensions
{
public static object Create(this IServiceFactory factory, Type serviceType)
{
return typeof(IServiceFactory).GetMethod("Create")
.MakeGenericMethod(serviceType)
.Invoke(factory, new object[] { });
}
}
class Program
{
static void Main()
{
var container = new WindsorContainer();
container.AddFacility<TypedFactoryFacility>();
container.Register(Component
.For<IServiceFactory>()
.AsFactory());
container.Register(Component
.For<IMyService>()
.ImplementedBy<MyService>()
.LifeStyle.Singleton);
var factory = container.Resolve<IServiceFactory>();
var s1 = factory.Create<IMyService>();
var s2 = factory.Create(typeof(IMyService));
Console.WriteLine(s1.GetType().FullName);
Console.WriteLine(s2.GetType().FullName);
if (s1 == s2) Console.WriteLine("Success");
}
}
public interface IServiceFactory
{
//Original Create method that works
T Create<T>();
////The overload that I need that throws an exception
//object Create(Type service)
void Release(object service);
}
public class MyService : IMyService
{
}
public interface IMyService
{
}
}