Tasks are represented by the task type and related types in the. Mvc automatically buffers any concrete type that implements. Getmimemappingstring filename to get the mimetype for your file. The answer is, choosing a derived type for a specific result is a good practice, but.
May 12, 2014 mvc deki actionresult type lara dair ornekler inceledik. In this article i am describing the actionresult method used in model view controller mvc based asp. So redirect result and content result have a common base class. By default, it generates a response in the form of actionresult. Obviously that class represents an action of some kind, but exactly what does it do.
Net mvc 4 is a framework for building scalable, standardsbased web applications using wellestablished design patterns and the power of as. You can find all types derives from actionresult here permalink posted 19jan14 23. The actionresult class encloses the output of the action method and does the operation. Viewresult partialviewresult contentresult redirectresult redirecttorouteresult jsonresult emptyresult fileresult javascriptresult let we discuss one by one.
Also, we discussed about routers and controllers in asp. Actionresult is the base class of all the result type action method. Any nonabstract class deriving from actionresult qualifies as a valid return type. Part 78 different types of actionresult in asp net mvc youtube. Mvc action returning more than one actionresult the asp. Phil haack has a nice article where he created a custom file download action result class. These actionresults are responsible for returning content to the.
Problem solved all of the mvc actionresult types share the action result base. Net mvc 5 because the contentresult is a data type whose base data type is actionresult, hence you have to understand actionresult. Im going to create a generic class that can handle multiple types of objects and serialize them to xml using the same piece of code. In mvc controls there are different type of action result we use as a return type from a controller action method in which viewresult, actionresult and jsonresult are commonly used. There are many derived actionresult types in mvc that we use to return the result of a controller method to. It help us to return models to views, other return value, and also redirect to another controllers action method. You can find all types derives from actionresult here. Actionresult is an abstract parent class from which viewresult class has been derived. Net mvc web application using visual studio express 2012 for web, which is a free ve.
Actionresult return type you can create action methods that return an object of any type, such as a string, an integer, or a boolean value. Viewresult renders a specified view to the response stream. Aug 15, 20 in this video, we will discuss different types of actionresult objects that can be returned by an action method. For example, enter a url into the browser, click on any particular link. What should the mvc actionresult return type be for an external html ajaxform. Action result return type in mvc 4 sriramjithendra nidumolu. Mvc 4 webapp passing id from view to actionresult method. So, the purpose of posting this tip is to help the naive programmer like me to get the solution in the easiest way.
Executeresultcontrollercontext enables processing of the result of an action method by a custom type that inherits from the actionresult class. But i only want authenticated users to be able to download the file. The following works in mvc 2 and mvc 3 without an issue. Learn different types of action results in mvc eduonix blog.
Building a custom actionresult in mvc 2 to download excel. Partialviewresult renders a specified partial view to the response stream. There are many derived actionresult types in mvc that you may use to return the results of a controller method. Actionresult are more specific for a particular view it is abstract class that has many subtypes types of actionresult. Want to serve a pdf file with dynamicallygenerated content. There is no longer need for this custom actionresult because asp. Lets peel back the covers on actionresult and discover why it and its derived classes are critical to understanding asp. Choosing the derived type for a specific result is a good practice, but when you want. Why there is contentresult data type in the action method.
Lets close the peek window and change our methods return type to actionresult. So you have hit this blog note because you are confused about the difference between viewresult and actionresult and i hope that your confusion ends here. Part 78 different types of actionresult in asp net mvc. Usually these reports are embedded into html page and. Validateantiforgerytoken public actionresult indexbindinclude. The class filepathresult builds on top of fileresult and just adds the ability to download any type of file. Because of url routing, you shouldnt point the user to your file, you should point them to a url route and let the controller do the work for you. There are many derived actionresult types in mvc that we use to return the result. A simple pdf actionresult in mvc posted on november 19, 2012 by cprakash recently, i needed an actionresult implementation to return the pdf documents from my controller action to mvc views and it tooks few minutes to build the functionality on the existing fileresult. Here, in this article we will learn about differences between them.
Mvc automatically buffers any concrete type that implements iasyncenumerable. The following is the signature of a typical action method in a controller. Actionresults is the base class of all result types. These return types are wrapped in an appropriate actionresult type before they are rendered to the response stream. Actionresult is the base class which supports different types of result types like actionresult, partialviewresult, jsonresult etc. In this article we are going to see about uploading and returning files in an mvc application. If there is no content type specified, it will download the content as a file. Viewresult partialviewresult contentresult redirectresult redirecttorouteresult jsonresult emptyresult.
I have a method below that returns a file, and i need to check before hand the file type such as text, doc, pdf or excel. Net mvc action results and pdf content simple talk. Types of action results there are different types of action results in asp. In mvc controller may have one or more actions and can return different types of results like if you want to return json, javascript, empty result, return view, etc.
In this article we will learn what are the available action results and which one we need to use in which case. The file is downloaded and returned from my actionresult. Net mvc provides a simple and versatile means of returning different types of response to the browser. The example is just a demo to show the implementation of custom actionresult feature in mvc. The above code means that you are returning a viewresult object and due to polymorphism, this object is automatically type casted to the parent class type, i. Actionresult is a return type of a controller method in asp. Difference between viewresult and actionresult in mvc. The actionresult class is the base class for all action results. Lets first start be creating the custom actionresult.
Action methods help us to return models to views, file streams, and also redirect to another controllers action method. It is possible be explicit about what type to return, but generally it not necessary. You only need to specify the virtual path of the file and the name to be saved as. Here, we will take a deeper look into the different actions, action filters, and selectors used inside a controller. Downloading video or playing video directly in a browser can be possible using various other methods in web applications. Net framework 4 introduced an asynchronous programming concept referred to as a task and asp. Mvc assembly, then you can download after clicking here. Following is a simple code snippet which can be used as action in mvc controller. We will also see about the different types of file action results that helps to return files from the server and even we created a custom file action result. Solved types of action result in mvc 4 codeproject. Haack has a nice article where he created a custom file download action result class. As we see in the visual studio, the actionresult type is coming from system. Net web forms data controls mvc 4 webapp passing id from view to actionresult method.
There are following result type action method in mvc. Uploading multiple files in mvc 4 razor provides clientside validation too. Net mvc interview question which making circles around actionresult is an abstract class while viewresult derives from actionresult class. Partial view result return type in mvc 5 with sample web application.
This section describes features that have been introduced in the asp. The actioninvoker decide which type of action result to return based on the task that the action method is performing. Follow the web platform installer wizard to download and install asp. Net type that doesnt inherit actionresult, the actual response is. Types of action result the diagram shown below describes about abstract class of action result.
Any action in an mvc controller, generally speaking, returns an actionresult. Nov 19, 2012 a simple pdf actionresult in mvc posted on november 19, 2012 by cprakash recently, i needed an actionresult implementation to return the pdf documents from my controller action to mvc views and it tooks few minutes to build the functionality on the existing fileresult. Net mvc provides a simple and versatile means of returning. Browse other questions tagged ajax mvc4 download actionresult or ask your own question. Net mvc action methods are responsible to execute requests and generate responses to it. Some common return types in this category are badrequestresult 400, notfoundresult 404, and okobjectresult 200. Nov 01, 2014 so when you see mvc controller and action codes as shown below. According to the first part of the question, why there is contentresult data type in the action method, to understand this, you have to understand about the data types in asp. Net mvc 5 because the contentresult is a data type whose base data type is actionresult, hence you have to understand action result. Recently lots of interview questions are asked around asp. This blog describes about the actionresult subtypes in mvc. We can return various types of results as actionresult, which will decide how the output needs to render on the browser. In this video, we will discuss different types of actionresult objects that can be returned by an action method.
Net mvc 4 components for visual studio require powershell 2. Ive built a little prototype application using mvc 4 rc and something very basic is broken. Each result has a different type of result format to view. Net mvc 5 because the contentresult is a data type whose base data type is actionresult, hence you have to. In the company im currently working for, it is a common practice to use devexpress xtrareports to create all kind of reports. Net mvc 5 because the contentresult is a data type whose base data type is. Mar 28, 2014 action result return types what is actionresult. Alternatively, convenience methods in the controllerbase class can be used to return actionresult types from an action. So without wasting time, lets get the difference in one sentence. We will also see how we can apply validations to the posted files easily using view models. The framework encourages you to maintain a clear separation of concerns views for ui, controllers for handling user input, and models for domain logic.
Dino shows you how simple this can be using a tailormade actionresult class. Actions typically have a onetoone mapping with user interactions. Net mvc and html5 article using custom actionresult. By default, the controller actions will return the actionresult object. The framework encourages you to maintain a clear separation of concerns views for ui, controllers for. After calling the action method in browser, the file will ask for download as. All that needs to be done is create a class that derives from actionresult.
One is actionresult and another one is executeresult. Net mvc 5 tutorial controllers and action result types. The actionresult method is derived from the actionresult class. An actionresult is a return type of a controller method in mvc. Building a custom actionresult in mvc 2 to download excel files ive seen this question asked several times on the forums, and that is how do you download files when youre working with mvc. Writing a custom file download action result for asp. I want to download files on browser with ajax and actionresult. I need to direct the user to a your download is starting page and doing a file download.
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