Tech learning

In AutoMapper 4.2 version, static implementation is removed with instance approach. It could be a nightmare to migrate the codes to the newer version with instance approach. I will be putting up guide for migrating codes from the older version to instance approach if someone has used Profile based approach. Previous implementation (old implementation) Profile based implementation mapping public class UserProfileMapping : Profile { protected override void Configure() { Mapper.CreateMap<UserProfile, PreferenceViewModel>() .ForMember(vm => vm.UserId, m => m.MapFrom(profile => profile.Id)); } } Single class for registering all AutoMapper configuration public static class AutoMapperConfiguration { public static void Configure() { Mapper.Initialize(cfg => { cfg.AddProfile(new UserProfileMapping()); }); } } ...

SignalR is a very flexible framework to create bidirectional communication between client and server. The general process that is followed won't allow to have strongly typed calls on the server and also in client code. We will look into how to make strongly typed calls on the server through interface and client end through TypeScript. SignalR - making strong type on server side code Since client-side methods are very dynamic in nature, so calling those from server side behaves similarly to allow any calls. SignalR Hubs are derived from Microsoft.AspNet.SignalR.Hub class, there is also a generic version available to follow typed items. Ex: The interface is the replication of possible calls that would be received on the client end and calling of client-side methods on server code. /// <summary> /// Client(JS) side chatting interface callbacks. /// </summary> public interface IChatHub { /// <summary> /// Gets the online users...

Some time back I had written a blog on managing history for required models ( http://vikutech.blogspot.in/2015/08/implementing-automating-audit-logs-in-telerik-data- access.html ). In this particular example, we would be looking for managing small summary of information based on tables affected in the particular request of context. Like what kind of operation were done on models and by whom. The approach for implementation is to create required model to store summary information and attach DB context events based on required format. The Basic data model for collecting information, just having user identifier and message. /// <summary> /// User activity log domain model /// </summary> public class UserActivityLog : IPrimaryKey<int> { /// <summary> /// Gets or sets the identifier. /// </summary> /// <value>The identifier.</value> public int Id { get; set; } /// <summa...

Making direct dependency with Azure sounds as a big problem if there is a possibility of switching to other platforms in future. Also, in general, making dependencies with Azure also makes mandatory to run the application through Azure Emulator which itself takes the time to load application whenever need to be debugged. It takes huge amount of development time also based on architecture point it is not a good idea to have any hard dependency in application. In this article, we will look into creating a mechanism for file upload which could be switched from Azure to local server or vice-versa. The two key parts that are needed are to access the uploaded file and to upload the file. The starting stage is to create interfaces to access file path and upload files to server. This would allow us to change the implementation based on need. Interfaces IFileUpload : Interface for uploading files using MyProject.Model.DTO.Upload; using MyProject.Model.Enumeration; ...

WeakReference is a new element added into 4.5 framework, but it was available in Java from the earlier stage only. So, this article could be useful for .Net, Java, and Android as well. What is it? It is nothing more than a class but what special about is to interact with Garbage Collector in a certain way which could help out in optimization. Scenario We all know that static members are created and shared throughout the application and life cycle by maintaining only single instance. Possibly it can useful in cases where data need to be frequently accessed but what about those that doesn't need to be frequently accessed all times. Those data might be resource hungry data so static or some kind of caching mechanism is required. Storing something in static members or caching increases memory footprint for the application. This is once situation, but there might be other situation as well. WeekReference is a technique to hook up member with Garbage collector to retrieve actual ...

It can be bit tricky to configure both Ninject and Asp.Net Identity UserManager if some value is expected from DI to configure UserManager. We will look into configuring both and also use OwinContext to get UserManager. As usual, all configuration need to be done on Startup.cs. It is just a convention but can be used with different name, the important thing is to decorate class with following attribute to make it Owin start-up: [assembly: OwinStartup(typeof(MyProject.Web.Startup))] Ninject configuration Configuring Ninject kernel through method which would be used to register under Owin. Startup.cs public IKernel CreateKernel() { var kernel = new StandardKernel(); try { //kernel.Bind<IHttpModule>().To<HttpApplicationInitializationHttpModule>(); // TODO: Put any other injection which are required. return kernel; } catch { kernel.Dispose(); thro...