Skip to main content

ASP.NET MVC ACTION SELECTORS AND ACTION VERBS


ASP.NET MVC ACTION SELECTORS AND ACTION VERBS

Action Selectors

Action Selector is basically an attribute, which you can apply on any action method in MVC Controller. It helps your routing engine to select the correct method to handle the particular request. In MVC 5, Action Selectors are very helpful and popular. MVC 5 includes 3 Action Selectors attributes.
1.     NonAction
2.     ActionName
3.     ActionVerbs

NonAction

Non Action selector attribute helps us to indicate that our public method of a Controller is not an Action method. The main use of Non Action attribute is when you want public method in a Controller, that is not treated it as an Action method. We create a nonaction for the purpose of code reusability in our controller class.
Example
nonaction method

ActionName

ActionName attribute is used to change the name of the action at runtime. In another word, Action Name attribute allows us to specify the different Action Names rather than method names. It means that you can hit URL in the Browser by your Action Name rather than the method name given above on your Action Result method. The example is given below.
actionname method


Action Verbs

Action Verbs are very popular nowadays in APIs. This selector is basically used when you want to control the Action method based on Http request method. Here, you can define two different Action methods with the same name but one Action method acts or responds to HTTP Get request method and another Action method responds to HTTP Post request method.
The famous Action Verbs supported by MVC framework are HttpGet, HttpPost, HttpPut, HttpDelete, HttpOptions & HttpPatch. Http Method represents a request for the information about its communication options, which are supported by the Web Server.
We can’t overload our action methods like we do in C#. But with the help of action verbs, we can overload our action method. We select a different action method depending upon the request with the help of action verbs.
Here, in ASP.NET MVC, we have few action verbs but they are extensively used in Web APIs. But here, in MVC, we normally use two action verbs.
  • HttpGet
    It is used to handle GET Request.
  • HttpPost
    It is used to handle POST Request.
But if you don’t apply any action verb, then this action will be treated as GET request action as shown below.

action verb methods

The image above shows example of both GET and POST Verbs on Edit Action Method.

There are some other types of Actions verbs which also exist like
HttpPut for updation and HttpDelete for deletion
There are some key points to keep in mind.
  • Action methods can’t be private or protected, they must be public.
  • Action methods can’t be static.
Thank you



Labels:
Location: Abuja, Nigeria

Comments

Post a Comment

Popular posts from this blog

Collections in C#

Collections in C# In our previous article , we have learned about how we can use arrays in C#. Arrays in programming are used to group a set of related objects. So one could create an array or a set of Integers, which could be accessed via one variable name. What is Collections in C#? Collections are similar to Arrays, it provides a more flexible way of working with a group of objects. In arrays, you would have noticed that you need to define the number of elements in an array beforehand. This had to be done when the array was declared. But in a collection, you don't need to define the size of the collection beforehand. You can add elements or even remove elements from the collection at any point of time. This article will focus on how we can work with the different collections available in C#. There are three distinct collection types in C#: standard generic concurrent The standard collections are found under the System.Collections. They do not store elemen...
Post a Comment
Read more

The String.Join Method in C# Explained

The String.Join Method in C#   The string.Join concatenates the elements of a specified array or the members of a collection, using the specified separator between each element or member. Overloads of string.Join Method Description Join(Char, Object[]) Concatenates the string representations of an array of objects, using the specified separator between each member. Join(Char, String[]) Concatenates an array of strings, using the specified separator between each member. Join(String, IEnumerable<String>) Concatenates the members of a constructed IEnumerable<T> collection of type String, using the specified separator between each member. Join(String, Object[]) Concatenates the elements of an object array, using the specified separator between each element. Join(String, String[]) Concatenates all the elements of a string array, usi...
Post a Comment
Read more

System.IO Namesapce in C#

  System.IO Namesapce in C# A  file  is a collection of data stored in a disk with a specific name and a directory path. When a file is opened for reading or writing, it becomes a  stream . The stream is basically the sequence of bytes passing through the communication path. There are two main streams: the  input stream  and the  output stream . The  input stream  is used for reading data from file (read operation) and the  output stream  is used for writing into the file (write operation). From the above definition of file, the C# provides a namespace that enable us to manipulate file in C# called System.IO.   System.IO  is a  namespace  and it contains a standard IO (input/output) types such as classes , structures , enumerations , and  delegates  to perform a read/write operations on different sources like file, memory, network, etc.   System.IO Classes The table below shows differen...
Post a Comment
Read more