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What is the difference between a View and a PartialView in ASP.NET MVC?
At first glance the need for both seems non-obvious to me.
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Consider a partialview like a control in webforms, the idea is the partial is reusable
In theory, the answer is: A partial view is a "sub-view" that you embed within a main view - something that you might reuse across multiple views, like a sidebar.
In practice, the answer is: Very little.
In theory, partial views are more lightweight than standard views, but it's perfectly OK to pass a "regular" view to
RenderPartialand the performance seems to be exactly the same. I frequently use regular .aspx views as "partial" views because you can make them reference a master view in order to provide templated content like what you can do with UserControls in ASP.NET WebForms. See here.Partial views are more like web parts on a portal - they are completely self-contained objects. Use them if the layout is simple and static, or if you're annoyed by the Intellisense errors when you don't have the
<html>and<body>tags in a standard View.It works like that:
return View() the view content goes in the @RenderBody() of the /Shared/_Layout.cshtml
return PartialView() it returns only the view content
Look at StackOverflow.com site: Main site (View) contains components like:
So Tags, related, Ad etc. can be composed as PartialViews. The advantage of this is that PartialViews can be simply cached by OutputCache instead of recreating all site: performance gain.
Views are the general result of a page that results in a display. It's the highest level container except the masterpage. While a partial view is for a small piece of content that may be reused on different pages, or multiple times in a page.
If you're coming from webforms, view is similar to a web content form, while a partial view is like a user control.
If you come from a webforms background, think of PartialView as a usercontrol.