CHILD Action Methods in ASP.Net MVC 4

Sachin Kalia

5y153.1k13100Article

ASP.NET MVC MVC 4ChildAction Method in MVC 4

13 Comments

Join the conversation! Your thoughts help the community grow.

Joginder Banger8y ago
Good job thanks.... Why we can not hit through address which class or interface prevents.
Niranjan Poddar8y ago
Nice explanation.....Thanks
- ssss sss6y ago
  Please explain childaction in MVC.
yogesh bombe9y ago
Can we redirect to different page instead of showing error page of ChildActionOnly attribute
Ravi Patel10y ago
nice explanation thanks
shaik peerulla11y ago
Great article thanks for posting
Sachin Kalia11y ago
Prakash JoshiA Child Action method is an action method which its accessible from the View only, if you invoked this action via an URL then it prompts you an error..A sceanrio could be like this...You have created a View and in that same view you are using ChildAciton method to call another view..(Demanding View) Try it once..Hope the scenario is clear to you..
Prakash Joshi11y ago
Hello Sachin Kalia can I use Child Action Method for viewing both Index view and Create View in a same page
Sachin Kalia12y ago
Thanks @Pradeep
Pradeep Shet12y ago
good 1
Guest User12y ago
thanks Sachin!
Sachin Kalia12y ago
The main advantage is You have leverage.to call it from View.There is no need to invoked via URl 2.Child Actions are mostly used to render partial pieces in pages like some reused information (widgets).You can call PartialView with hekp of Action and Renderaction method as i described above in [email protected]("ChildAction", "Home", new { param = "first" }) .
Guest User12y ago
what is the main advantage of using childaction, and same use case? can you please explain.

Introduction

In this article, we will explore Child Action methods accessible at the View level. In general, each public method in a controller class is an action method.

There could be multiple scenarios when we want to display some dynamic information (data) on pages. A Child action is helpful in those scenarios.

A ChildAction method is an action method thought its accessible from the View only, if you invoked this action via an URL then it prompts you an error that we will look down the level in this article.

I have a HomeController in the MVC application that contains code as given below:

public class HomeController : Controller
{
public ActionResult Index()
{
ViewBag.TempValue = "Index Action called at HomeController";
return View();
}
[ChildActionOnly]
public ActionResult ChildAction(string param)
{
ViewBag.Message = "Child Action called. " + param;
return View();
}
}

To behave an action as child action it requires decorating with [ChildActionOnly] as shown in the image below:

Initially it is invoking an Index action that in turn returns to Index views and at the View level it calls the ChildAction named “ChildAction”.

This is the code of index.cshtml:

@{
ViewBag.Title = "Index";
}
<h2>
Index
</h2>
<!DOCTYPE html>
<html>
<head>
<title>Error</title>
</head>
<body>
<ul>
<li>
@ViewBag.TempValue
</li>
<li>@ViewBag.OnExceptionError</li>
@*<li>@{Html.RenderAction("ChildAction", new { param = "first" });}</li>@**@
@Html.Action("ChildAction", "Home", new { param = "first" })
</ul>
</body>
</html>

And this is how we declare an action in a view as depicted in the image below:

Now I run the application and it will call an action method via the Index.cshtml page. And the result is as below:

Note: if you try to access the ChildAction method directly than it prompts you with an error as per the image below.

Copy this URL and paste it into a browser: http://localhost:50255/Home/ChildAction/Second

It prompts you with the error:

It may help you sometime in the future.

Thanks

To understand more about MVC please go through the following link:

MVC Articles

Enjoy coding and reading.