Filepathresult represents a downloadable file with a path. Net mvc how to return the file contents as actionresult. Hi, im new to mvc nooob, and following ms tutorial, and its just introduced async task and shows the benefits. See the different actionresults and learn about when to use each of them. So really these two code snippets do the exact same thing. Viewresult renders a specifed view to the response stream actionresult is an abstract class that can have several subtypes. For example, the viewresult return the html response. In mvc framework, it uses actionresult class to reference the object your action method returns. They may need to get a file, or redirect, or any of a myriad things. Net mvc interview question which making circles around. Foreach executes each element parallel and wait till they finish. When we want to render a view, we simply use return viewviewname, model. Net mvc this article will show you how to download multiple files in asp. Actionresult is an abstract parent class from which viewresult class has been derived.
Difference between viewresult and actionresult interview question. For example, if we just specify a url and a mime type, the browser attempts to display the file specified at least it does in firefox, chrome, and ie10, where i tested it. In case you are a newbie to polymorphism, lets do a quick revision. Difference between viewresult and actionresult stack overflow. Other derived classes include jsonresult and partialviewresult. The only difference is that with the actionresult one, your controller isnt promising to return a view you could change the method body to conditionally return. Actionresult can be used to exploit polymorphism and dynamism. I decided to build a base class pdfresult to abstract the contenttype implementation as well as it will also serve as a common return. The fileresult in mvc is one of the most openended actionresults and can. From reports to scan sheets, the need to generate pdf files has been present in. May 20 2 april 20 22 march 20 14 february 20 7 january 20 7 december 2012 8 categories. Actionresult is a return type of a controller method in asp. Action result is a result of action methods or return types of action methods. It is used to return the models to the views, file streams and also redirect to the controllers.
It makes our job simpler by doing some plumbing work for us, lets see. Actionresult is a general result type that can have several subtypes from asp. All of these action results inherit from the base actionresult class. View method returns the viewresult, which produces the html response.
The following is the signature of a typical action method in a controller. If we want to return a file, this is the actionresult we use. Viewresult view this return type is used to return a webpage from an action method. 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.
View result class is inherited from action result class by view result. Net mvc controller system, and definitely worth taking a good look at. How to connect two routers on one home network using a lan cable stock router netgeartplink duration. Net mvc which returns byte array for pdf passing searchbox value to actionresult method in mvc4 mvc3 viewresult vs actionresult. Create a folder, uploads, and add some pdf or any file for fileresult action to read file. As you know, an action is referred to as a method of the controller, the action result is the result of action when it executes. The view method searches for the view in views folder to locate the. This article will explain to you different types of actionresult in mvc with example. Actionresult subtypes viewresult renders a specifed view to the response stream partialviewresult renders a specifed partial view to the response stream emptyresult an empty response. For example, the index controller action in listing 2 returns a viewresult.
So when you see mvc controller and action codes as shown below. When it is used with action method, it is called return type. In this video, we will discuss different types of actionresult objects that can be returned by an action method. 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. As you see in visual studio, the actionresult type is coming from system. Viewresult renders a specifed view to the response. Does it mean that you should use async task all the time rather than the normal actionresult, which is how it started the tutorial. List of subclasses derived from actionresult abstract class. It can accept byte arrays, filestreams, and urls of files and in all scenarios return or download the file specified. The file is downloaded and returned from my actionresult. View result and partial view result in mvc dot net tutorials. Viewresult and actionresult in mvcactionresult is an abstract or base class. In this article, i am going to discuss the view result and partial view result in asp.
You can specify how many elements may execute in parallel using maxdegreeofparallelism here is. The actionresult method works as a return type of any controller method in the mvc. Arguably the simplest kind of action result that is defined by asp. Please read our previous article where we discussed the basics and categories of action result in detail. How do i redirect within a viewresult or actionresult function.
Each result has a different type of result format to view page. Whats the difference between actionresult and viewresult for. Actionresult is an abstract class that can have several subtypes. Difference between viewresult and actionresult in asp net. It help us to return models to views, other return value, and also redirect to another controllers action method. There are different types of action results in asp. There are many derived actionresult types in mvc that you may use to return the results of a controller method. A controller unit test avoids scenarios such as filters, routing, and model binding. Viewresult renders a specified view to the response stream. Let we start discussion about types of actionresult in one by one viewresult. Actionresult is a general result type that can have several subtypes.
In our case, the path is rootdownloads, and so our action will look as follows. Whats the difference between actionresult and viewresult. There are many derived actionresult types in mvc that we use to return the result of a controller method to. 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. Difference between viewresult and actionresult in asp net mvc may be you like this our channel. It is a concrete class, so subtypes are not available for viewresult class. You can rate examples to help us improve the quality of examples. But what the framework actually does for us behind the scene is that it news up an instance of viewresult, fill its property with the values we provided, or the values that should be set on the controller level. Actionresult is a base class for viewresult in mvc framework, it uses actionresult class to reference the object our action method returns. Actionresult is an abstract class, and its base class for viewresult class. Json result javascript result file result content result mvc.
Setting a filedownloadname downloads the pdf instead of viewing it public. Initializes a new instance of the actionresult class. Enables processing of the result of an action method by a custom type that inherits from the actionresult class. 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. The diagram shown below describes about abstract class of action result. How do i redirect within a viewresult or actionresult. One is actionresult and another one is executeresult. Mvc assembly, then you can download after clicking here. And the code for action method using fileresult type is as follows. It is the responsibility of the controller that it connects the component. Filestreamresult represents a downloadable file with a file stream. You are able to create action method that can return any instance that is wrapped in appropriate actionresult type. Mvc difference between viewresult and actionresult. In this article we will learn what are the available action results and which one we need to use in which case.
Action methods return models to views, file streams, redirect to other controllers, or whatever is necessary for the. Depending on which overload we pick, we can specify what action the browser is to take with the downloaded file. Net mvc and razor to generate pdf files dave glick. When modelstate isnt valid, the same viewresult is returned as for a get request. Free source code and tutorials for software developers and architects updated. What is the difference between viewresult and actionresult. Actionresult has several derived classes like viewresult,jsonresult, filestreamresult and so on. It is derived from base class actionresult it is a base class for viewresult subtypes. Action methods help us to return models to views, file streams, and also redirect to another controllers action method.
Use the filepathresult to return a file content as the response. Actionresult method returns an instance that derives from actionresult. As we see in the visual studio, the actionresult type is coming from system. So without wasting time lets get the difference in one sentence. Part 78 different types of actionresult in asp net mvc. Actionresult is an abstract class while viewresult derives from actionresult class. Difference between viewresult and actionresult in mvc.
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