Controllers & actions

Jul 11, 2011Download as PPTX, PDF1 like842 views

This document provides an overview of controllers and actions in the MVC framework. It discusses how controllers are responsible for responding to requests, validating actions, and providing data and error handling. It also covers specific controller concepts like ViewData/ViewBag, action attributes, action results, and asynchronous actions.

Controllers & Actions in MVCEyal VardiCEO E4D Solutions LTDMicrosoft MVP Visual C#blog: www.eVardi.com

AgendaControllers OverviewViewData vs. ViewBagAction & ActionResultController AttributesAsync Controller

Understanding ControllersMVC controllers are responsible for responding to requests made against an ASP.NET MVC website.

The Controller ResponsibilityExecute the right action method and validating that it can be called.Getting the values to use as the action method's arguments.Handling all errors that might occur during the execution of the action method.Providing the default WebFormViewEngineclass for rendering ASP.NET page types (views).

Controller Samplehttp://E4D.co.il / Course / Net / MVC /http://E4D.co.il / Course/ Net ? name=MVCpublic class CourseController : Controller{ public ActionResult Net( string name ) { var course = BL.GetCourse(name); return View( course ); }}

ViewData PropertyUsed to set view-specific data in a dictionary object that can hold multiple name/value pairs.public class CourseController : Controller{ public ActionResult Net( string name ) { ViewData["Course"] = BL.GetCourse(name); return View(); }}

ViewBag PropertyUsed to set view-specific data in a dictionary object that can hold multiple name/value pairs.public class CourseController : Controller{ public ActionResult Net( string name ) { ViewBag.Course = BL.GetCourse(name); return View(); }}

ActionsAction == MethodAction must meet certain requirements:Must be public.Cannot be a static method.Cannot be an extension method. Cannot have open generic types.The method is not a method of the controller base class.The method cannot contain ref or out parameters.

Preventing an Action to InvokePrevent the method from being invoked by using the [NonAction] attribute. public class HomeController : Controller{ [NonAction] public string CompanySecrets() { return "This information is secret."; } ...}

Action ResultsA controller action returns something called an action result.Action results types:ViewResultEmptyResultRedirectResultJsonResultJavaScriptResultContentResultFileContentResultFilePathResultFileStreamResultHttpNotFoundResultHttpRedirectResultHttpStatusCodeResult

Controller “View” MethodsNormally, you do not return an action result directly. Instead, you call one of the following methods of the Controller base class.

Controller Attributes[ChildActionOnly][SessionState][OutputCache][ActionName][NonAction][AcceptVerbs][HttpGet][HttpPost][HttpPut][HttpDelete]

SessionState AttributeUsing the attribute, you can completely turn on or off session state, adjust it to read-only, or make it required.Default, Required, ReadOnly & Disabled.[SessionState( SessionStateBehavior.Disabled )]public class HomeController : Controller { public ActionResult Index() { Session["E4D"] = "E4D Learning"; return View(); } }

OutputCacheAttribute[ChildActionOnly][OutputCache( Duration = 20 )]public ActionResult CurrentTime() { return PartialView(); }<h2>OutputCache Sample</h2> View Time: @DateTime.Now.ToString("h:mm:ss")<br /> Partial View Time: @{ Html.RenderAction("CurrentTime");}

Async ControllerThe AsyncControllerclass enables you to write asynchronous action methods.

Async Actionpublic class PortalController : AsyncController{ [AsyncTimeout(Duration = 5000 )] publicvoidNewsAsync(string city) { AsyncManager.OutstandingOperations.Increment(); NewsServicenewsService = newNewsService(); newsService.GetHeadlinesCompleted+= (sender, e) => { AsyncManager.Parameters["headlines"] = e.Value; AsyncManager.OutstandingOperations.Decrement(); }; newsService.GetHeadlinesAsync(city); } public ActionResult NewsCompleted(NewsHeadline[] headlines) { return View( "News", new ViewStringModel { Headlines = headlines } ); }}Async Action

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Webinar Recording: https://www.panagenda.com/webinars/hcl-nomad-web-best-practices-und-verwaltung-von-multiuser-umgebungen/ HCL Nomad Web wird als die nächste Generation des HCL Notes-Clients gefeiert und bietet zahlreiche Vorteile, wie die Beseitigung des Bedarfs an Paketierung, Verteilung und Installation. Nomad Web-Client-Updates werden “automatisch” im Hintergrund installiert, was den administrativen Aufwand im Vergleich zu traditionellen HCL Notes-Clients erheblich reduziert. Allerdings stellt die Fehlerbehebung in Nomad Web im Vergleich zum Notes-Client einzigartige Herausforderungen dar. Begleiten Sie Christoph und Marc, während sie demonstrieren, wie der Fehlerbehebungsprozess in HCL Nomad Web vereinfacht werden kann, um eine reibungslose und effiziente Benutzererfahrung zu gewährleisten. In diesem Webinar werden wir effektive Strategien zur Diagnose und Lösung häufiger Probleme in HCL Nomad Web untersuchen, einschließlich - Zugriff auf die Konsole - Auffinden und Interpretieren von Protokolldateien - Zugriff auf den Datenordner im Cache des Browsers (unter Verwendung von OPFS) - Verständnis der Unterschiede zwischen Einzel- und Mehrbenutzerszenarien - Nutzung der Client Clocking-Funktion

Linux Support for SMARC: How Toradex Empowers Embedded DevelopersToradex

Toradex brings robust Linux support to SMARC (Smart Mobility Architecture), ensuring high performance and long-term reliability for embedded applications. Here’s how: • Optimized Torizon OS & Yocto Support – Toradex provides Torizon OS, a Debian-based easy-to-use platform, and Yocto BSPs for customized Linux images on SMARC modules. • Seamless Integration with i.MX 8M Plus and i.MX 95 – Toradex SMARC solutions leverage NXP’s i.MX 8 M Plus and i.MX 95 SoCs, delivering power efficiency and AI-ready performance. • Secure and Reliable – With Secure Boot, over-the-air (OTA) updates, and LTS kernel support, Toradex ensures industrial-grade security and longevity. • Containerized Workflows for AI & IoT – Support for Docker, ROS, and real-time Linux enables scalable AI, ML, and IoT applications. • Strong Ecosystem & Developer Support – Toradex offers comprehensive documentation, developer tools, and dedicated support, accelerating time-to-market. With Toradex’s Linux support for SMARC, developers get a scalable, secure, and high-performance solution for industrial, medical, and AI-driven applications. Do you have a specific project or application in mind where you're considering SMARC? We can help with Free Compatibility Check and help you with quick time-to-market For more information: https://www.toradex.com/computer-on-modules/smarc-arm-family

2025-05-Q4-2024-Investor-Presentation.pptxSamuele Fogagnolo

Cyber Awareness overview for 2025 month of securityriccardosl1

Semantic Cultivators : The Critical Future Role to Enable AIartmondano

AI EngineHost Review: Revolutionary USA Datacenter-Based Hosting with NVIDIA ...SOFTTECHHUB

I started my online journey with several hosting services before stumbling upon Ai EngineHost. At first, the idea of paying one fee and getting lifetime access seemed too good to pass up. The platform is built on reliable US-based servers, ensuring your projects run at high speeds and remain safe. Let me take you step by step through its benefits and features as I explain why this hosting solution is a perfect fit for digital entrepreneurs.

Mobile App Development Company in Saudi ArabiaSteve Jonas

EmizenTech is a globally recognized software development company, proudly serving businesses since 2013. With over 11+ years of industry experience and a team of 200+ skilled professionals, we have successfully delivered 1200+ projects across various sectors. As a leading Mobile App Development Company In Saudi Arabia we offer end-to-end solutions for iOS, Android, and cross-platform applications. Our apps are known for their user-friendly interfaces, scalability, high performance, and strong security features. We tailor each mobile application to meet the unique needs of different industries, ensuring a seamless user experience. EmizenTech is committed to turning your vision into a powerful digital product that drives growth, innovation, and long-term success in the competitive mobile landscape of Saudi Arabia.

Build Your Own Copilot & Agents For DevsBrian McKeiver

tecnologias de las primeras civilizaciones.pdffjgm517

Designing Low-Latency Systems with Rust and ScyllaDB: An Architectural Deep DiveScyllaDB

Want to learn practical tips for designing systems that can scale efficiently without compromising speed? Join us for a workshop where we’ll address these challenges head-on and explore how to architect low-latency systems using Rust. During this free interactive workshop oriented for developers, engineers, and architects, we’ll cover how Rust’s unique language features and the Tokio async runtime enable high-performance application development. As you explore key principles of designing low-latency systems with Rust, you will learn how to: - Create and compile a real-world app with Rust - Connect the application to ScyllaDB (NoSQL data store) - Negotiate tradeoffs related to data modeling and querying - Manage and monitor the database for consistently low latencies

Generative Artificial Intelligence (GenAI) in BusinessDr. Tathagat Varma

AI Changes Everything – Talk at Cardiff Metropolitan University, 29th April 2...Alan Dix

Talk at the final event of Data Fusion Dynamics: A Collaborative UK-Saudi Initiative in Cybersecurity and Artificial Intelligence funded by the British Council UK-Saudi Challenge Fund 2024, Cardiff Metropolitan University, 29th April 2025 https://alandix.com/academic/talks/CMet2025-AI-Changes-Everything/ Is AI just another technology, or does it fundamentally change the way we live and think? Every technology has a direct impact with micro-ethical consequences, some good, some bad. However more profound are the ways in which some technologies reshape the very fabric of society with macro-ethical impacts. The invention of the stirrup revolutionised mounted combat, but as a side effect gave rise to the feudal system, which still shapes politics today. The internal combustion engine offers personal freedom and creates pollution, but has also transformed the nature of urban planning and international trade. When we look at AI the micro-ethical issues, such as bias, are most obvious, but the macro-ethical challenges may be greater. At a micro-ethical level AI has the potential to deepen social, ethnic and gender bias, issues I have warned about since the early 1990s! It is also being used increasingly on the battlefield. However, it also offers amazing opportunities in health and educations, as the recent Nobel prizes for the developers of AlphaFold illustrate. More radically, the need to encode ethics acts as a mirror to surface essential ethical problems and conflicts. At the macro-ethical level, by the early 2000s digital technology had already begun to undermine sovereignty (e.g. gambling), market economics (through network effects and emergent monopolies), and the very meaning of money. Modern AI is the child of big data, big computation and ultimately big business, intensifying the inherent tendency of digital technology to concentrate power. AI is already unravelling the fundamentals of the social, political and economic world around us, but this is a world that needs radical reimagining to overcome the global environmental and human challenges that confront us. Our challenge is whether to let the threads fall as they may, or to use them to weave a better future.

Electronic_Mail_Attacks-1-35.pdf by xploitniftliyevhuseyn