This question is a real interview question of Gurgaon, Haryana company. I am trying to explain it with practical way.
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Let’s see the definitions of These:
RenderBody Method: This method is declared inside master page.
Generally known as Layout page in MVC. This method indicates that where your
page contents will display.
Related Question:
Can a Layout page has more than 1 RenderBody method?
Answer: NO. It will show following exception.
System.Web.HttpException: 'The "RenderBody" method has already
been called.'
Syntax: @RenderBody()
RenderPage
Method: This method is helpful to fill contents from other pages.
Related Question:
Can a Layout page has more than 1 RenderPage method?
Answer: YES.
Syntax: @RenderPage("~/Views/Shared/_Header.cshtml")
_Header is the name of file.
Its content will display where RenderPage method is used.
RenderSection Method: This method is used to show the contents of any section defined in the pages. It is helpful when your page many sections in the page and you want show any single or particular number of sections of the page.
Example of defining section in individual pages:
@section footer{
<b>From
About Page</b>
}
@section MySection{
<b>My Custom
Section - About Page</b>
}
Syntax of method:
@RenderSection("MySection", false). Second parameter is optional, if not given, it
will mandatory to declare section in
page. ‘false’ shows non-mandatory.
Related Question:
Can a Layout page has more than 1 RenderSection method?
Answer: YES.
teps to practice:
Step 1: Create an
MVC project and name it with any Name.
Step 2: Open
_Layout.cshtml file from Solution Explorer.
Step 3: Inside
layout file, write following code to understand above methods-
@RenderPage("~/Views/Shared/_Header.cshtml")
@RenderBody()
@RenderPage("~/Views/Shared/_Header2.cshtml")
@RenderPage("~/Views/Shared/_Header.cshtml")
@RenderSection("footer",false)
<hr />
@RenderSection("MySection", false)
Step 4: Create a
View inside Shared folder with name - _Header. And write following code:
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>_Header</title>
</head>
<body>
<div>
<h2>This is
from Header Page Text</h2>
</div>
</body>
</html>
Step 5: Create a
View inside Shared folder with name - _Header2. And write following code:
<html>
<head>
<meta name="viewport" content="width=device-width" />
<title>_Header</title>
</head>
<body>
<div>
<h2>This is
from Header 2 Page Text</h2>
</div>
</body>
</html>
Step 6: Open View
Contact.cshtml and create sections at bottom inside it:
@section footer{
<b>From
Contact Page</b>
}
@section MySection{
<b>My Custom
Section - Contact Page</b>
}
Step 7: Open View
About.cshtml and create sections at bottom inside it:
@section footer{
<b>From About
Page</b>
}
@section MySection{
<b>My Custom
Section - About Page</b>
}
How to practice:
Save the changes and run the MVC project. See the changes in
page by clicking on the menu options (HOME, ABOUT, CONTACT).
Remove method syntax one by one from the Layout page ->
run again -> see changes. Then again add one by one and see again changes.
I hope this exaplanation will help.
Happy Coding.
Rudra Pratap Singh
Software Engineer
