ASP.NET MVC filters

ASP.NET MVC filters are powerful tools that enable developers to include cross-cutting concerns in their applications. These concerns include logging, authentication, authorization, error handling, and others. Filters offer a simple and modular approach to adding functionality that can be applied globally, to specific controllers, or even to individual actions. In this article, we will look at the various types of filters available in ASP.NET MVC, as well as their use cases and how to effectively implement them.

Types of Filters in ASP.NET MVC:

ASP.NET MVC supports a variety of filters, each with a specific purpose, the types of filters in ASP.NET MVC are.

Authorization Filters

Action Filters

Result Filters

Exception Filters

Authorization Filters:

Purpose: Manage authorization logic, ensuring that users have permission to access certain resources.
Common Usage: Determine whether a user is authenticated or if they have specific roles or permissions.

Eg:

public class CustomAuthorizationFilter : AuthorizeAttribute

{

    protected override bool AuthorizeCore(HttpContextBase httpContext)

    {

        // Custom authorization logic

        return httpContext.User.Identity.IsAuthenticated;

    }

}

Action Filters:

Purpose: Run code before and after an action method is executed.
Common Usage: Logging, performance measurement, and input validation.

Eg:

public class LogActionFilter : ActionFilterAttribute

{

    public override void OnActionExecuting(ActionExecutingContext filterContext)

    {

        // Code to execute before the action runs

        Log("Action Method Executing");

    }

    public override void OnActionExecuted(ActionExecutedContext filterContext)

    {

        // Code to execute after the action runs

        Log("Action Method Executed");

    }

    private void Log(string message)

    {

        // Logging logic

        Debug.WriteLine(message);

    }

}

Result Filters:

Purpose: Run code before and after the action result is executed.
Common usage: Modifying the result and logging.

Eg:

public class CustomResultFilter : ResultFilterAttribute

{

    public override void OnResultExecuting(ResultExecutingContext filterContext)

    {

        // Code to execute before the result runs

        Log("Result Executing");

    }

    public override void OnResultExecuted(ResultExecutedContext filterContext)

    {

        // Code to execute after the result runs

        Log("Result Executed");

    }

    private void Log(string message)

    {

        // Logging logic

        Debug.WriteLine(message);

    }

}

Exception Filters:

Purpose: Handle exceptions raised by action methods.
Common usage: Logging exceptions and returning custom error views or messages.

Eg:

public class CustomExceptionFilter : FilterAttribute, IExceptionFilter

{

    public void OnException(ExceptionContext filterContext)

    {

        // Handle the exception

        LogException(filterContext.Exception);

        // Optionally set the result to a custom error view

        filterContext.Result = new ViewResult

        {

            ViewName = "Error"

        };

        filterContext.ExceptionHandled = true;

    }

    private void LogException(Exception exception)

    {

        // Logging logic

        Debug.WriteLine(exception.Message);

    }

}

Applying Filters:

Filters can be applied in various ways:

Globally: Applied to all controllers and actions in the application.

public class FilterConfig

{

    public static void RegisterGlobalFilters(GlobalFilterCollection filters)

    {

        filters.Add(new HandleErrorAttribute());

        filters.Add(new CustomAuthorizationFilter());

    }

}

Controller-Level: Applied to all actions within a specific controller.

[CustomAuthorizationFilter]

public class HomeController : Controller

{

    public ActionResult Index()

    {

        return View();

    }

}

Action-Level: Applied to a specific action method.

public class HomeController : Controller

{

    [LogActionFilter]

    public ActionResult Index()

    {

        return View();

    }

}

Custom Filters

Custom filters allow you to encapsulate specific behaviors that can be used throughout your application. To create a custom filter, either implement the filter interface or inherit from the base class.

Conclusion:

ASP.NET MVC filters are critical for handling cross-cutting concerns in a clean and maintainable manner. Understanding and utilizing the various types of filters can help you improve the functionality, security, and reliability of your applications. Filters, whether used globally, at the controller level, or on specific actions, provide a versatile way to intercept and process requests and responses, making them an essential tool in any ASP.NET MVC developer’s toolkit.

 

Best Training Institute in Chennai with Placement Assistance

Over the last decade, the IT industry has grown at an exponential rate. The software product industry in India is expected to reach $500 billion by 2030. The expansion of the IT industry has inevitably led to an increase in job opportunities in the field.

Why do so many people want to work in IT?

The main reason for the IT job boom is the pay. IT jobs offer a luxurious lifestyle. Additionally, there are numerous job opportunities available. Despite the recession, IT companies are always looking for new employees. If you have the skills that are required, it’s easy to advance. Additionally, the work environment is great. IT companies have a 5-day workweek. The company is flexible and allows for work in various industries.

However, a high-paying job means intense competition. To get a job and advance in your career, you must possess exceptional skills.

People those who want an IT job are looking for the best Software Training Institute to advance their professional lives.

Why is Chennai the best place for IT jobs?

Chennai is one of India’s business hubs. Although Chennai has a diverse business community, the IT industry dominates. Chennai is overflowing with IT firms and employees. So, Chennai is the best place to work as an IT professional.

How to choose a best training institute in Chennai with placement assistance?

In today’s competitive job market, obtaining the necessary skills and training is critical for securing rewarding employment. For many aspiring professionals in Chennai, enrolling in a reputable training institute that offers placement assistance is the first step toward a successful career. With so many options, selecting the best training institute can be challenging. In this article, we have listed the most important factors to consider when looking for the best training institute in Chennai that offers placement assistance too

• Define Your Career Goals: Before starting your search, consider your career goals and aspirations. Determine the specific industry or field you want to work in, as well as the skills required to succeed in that domain. This clarity will allow you to narrow your options and focus on institutes that provide relevant training programs.
• Research on Institutes: Find the Chennai training institutions that will help you achieve your professional objectives by conducting in-depth research. Make use of internet resources, peruse reviews, and ask experts in your network for recommendations. Consider elements like the institute’s standing, accreditation, faculty qualifications, curriculum, and facilities.
• Faculty Expertise: A major factor in the success of training initiatives is the calibre of the faculty. Examine the credentials, professional background, and pedagogical approaches of the institute’s instructors. A faculty of seasoned experts can provide insightful analysis and useful advice to improve your educational experience.
• Course Curriculum: Make sure the institute’s course offerings cover the most recent developments in technology and industry trends by evaluating them. For the development of skills, a thorough curriculum that blends theoretical knowledge with real-world application is necessary. Seek out institutions that provide certifications pertinent to the industry as well as chances for internships or practical projects.
• Infrastructure and Facilities: To evaluate the institute’s infrastructure and facilities, stop by or browse their website. Your learning experience can be greatly improved by a well-equipped training centre with contemporary amenities, computer labs, libraries, and interactive classrooms. Consider elements like accessibility to transportation, location, and the availability of online resources.
• Placement Assistance: The institute’s history of providing placement assistance is one of the most important factors to consider. Seek out institutions that can brag of a high placement rate for their students and partnerships with top businesses. Find out about the jobs available to graduates, the companies the institute partners with, and the placement process.
• Post-Training Support: Find out what kind of post-training support services the institute offers, like career counselling, interview preparation, and resume building. Your chances of finding work after the program are improved greatly if the training facility provides continued assistance to its graduates.
• Financial Aspects: Consider the training program’s expense and compare it to the possible return on investment in terms of future earning potential and career advancement. To make the training more affordable, investigate any financial aid, scholarships, or instalment plans that the institute may offer.
• Student Testimonials and Reviews: Lastly, get input from both current and former institute students to learn more about their educational experiences and placement results. Sincere evaluations and recommendations can offer insightful viewpoints and assist you in making a well-informed choice.

In conclusion, it’s important to carefully consider a number of factors when searching for the best training insititute in Chennai that offers placement assistance. These include your career goals, the reputation of the facility, its placement history, the faculty’s experience, the course curriculum, its infrastructure, and its post-training support services. Through careful investigation and careful consideration of your options, you can select an institution that will provide you with the training and education required to be successful in your chosen industry.

If you need any Training / Technical Support in ASP.NET / SQL / PYTHON software programs, Contact +91 90427 10472

Caching in ASP .NET Core:

Introduction:

Effective data caching techniques are critical to improving the performance of web applications in the modern digital environment, where speed and scalability are critical requirements. The robust caching features of Microsoft’s open-source, cross-platform ASP.NET Core framework can greatly increase the scalability and responsiveness of web applications. We’ll examine the advantages, methods for implementation, and best practices of caching in ASP.NET Core in this article.

 The Advantages of Caching in ASP.NET Core:

Caching stores frequently accessed data temporarily, reducing the need to retrieve it from its original source repeatedly. In ASP.NET Core, caching provides several advantages, including:

• Enhanced Performance: Caching lowers the latency involved in retrieving data from its original source by keeping frequently accessed data in memory, giving users faster response times.
• Decreased Database Load: By providing cached data rather than querying the database for each request, caching helps reduce the strain on the database server and increase system scalability.
• Improved Scalability: ASP.NET Core apps are more responsive and scalable when they use caching to manage more concurrent users and requests without sacrificing performance.

Types of Caching in ASP.NET Core:

Different caching mechanisms that meet different needs and scenarios are supported by ASP.NET Core. Several frequently utilized types of caching include:

• In-Memory Caching: This technique keeps data in the memory of the application so that it is easily accessible to queries made later. For storing small to medium-sized data sets that are accessed frequently, this kind of caching is appropriate.
• Distributed Caching: With distributed caching, data that has been cached can be shared between several applications or even between various web farm servers. Support for distributed caching with providers like Redis, SQL Server, or NCache is integrated into ASP.NET Core.
• Response Caching: This technique allows the entire HTTP response to be cached, including the status codes, HTTP headers, and HTML content that is generated. For content that can be cached at the HTTP level and is static or semi-static, this kind of caching is perfect.

Implementing Caching in ASP.NET Core:

Developers can take the following actions to take advantage of caching in ASP.NET Core:

• Configure Caching Services: Use the AddMemoryCache() or AddDistributedMemoryCache() methods to register caching services for either distributed or in-memory caching in the dependency injection container of the ASP.NET Core application.
• Install Caching Middleware: To enable response caching, add caching middleware to the application’s request processing pipeline by either implementing custom middleware for more granular control or by using the UseResponseCaching() method.
• Decorate Cached Resources: To define caching policies, such as cache duration, cache location, and cache profiles, decorate controller actions or Razor pages with caching attributes like [ResponseCache].

 Best Practices for Caching in ASP.NET Core:

The following best practices should be taken into consideration in order to optimize the advantages of caching while avoiding typical pitfalls:

• Use Caching Wisely: Only store in cache data that is likely to be frequently retrieved or computed at a high cost. Refrain from over-caching or caching frequently changing volatile data.
• Track Cache Performance: To guarantee optimal cache performance and avoid memory-related problems, track cache hit rates, eviction rates, and memory usage.
• Use Cache Invalidation: Use cache expiration policies or manual cache invalidation mechanisms, among other cache invalidation techniques, to guarantee that data in the cache is accurate and current.

 Conclusion:

Caching is a potent method for enhancing ASP.NET Core applications’ responsiveness, scalability, and performance. Developers can greatly lower latency, lessen database load, and improve user experience by utilizing caching mechanisms like in-memory caching, distributed caching, and response caching. To optimize its advantages while averting any potential downsides, caching must be used sparingly and in accordance with best practices. Because caching is a fundamental component of optimization strategies, ASP.NET Core applications can easily scale to meet the demands of contemporary online environments while delivering lightning-fast performance.