ASP.NET MVC.

 Model: Is creating classes and writing the
business logic and can be connected to a
database.
 View: Is the design [UI: User Interface].
 Controller: Helps to communicate between
model from view.

 From View, user gives input.
 The input is given to the Controller.
 The Controller then passes the data to a
Model.
 The Model checks the data and return back
to the View.

 When we run the program , by default it
invokes Index method.
 The Index method then invokes the
corresponding View.
 Every View has the extension as .cshtml
[Combination of C# and HTML code].

 Every action method should be associated
with a View.
 By default, the View name and Controller
name will be same.
 If the View name and Controller name is
different,
return view("viewname")

 ViewData: Is used to store data as a key-value
pair. It stores a single data at a time.
 Syntax:
ViewData["key"]=value;
where key is a unique name. It is user-
defined.

 ViewBag: Is used to store the data by giving a
name.
 Is used to store more than one data.
 Syntax:
ViewBag.name=value;

 The syntax used in view page is a
combination of C# code and HTML code is
called as Razor Syntax. ie: [C#,HTML ] or
[VB,HTML].
 Extension of the file is .cshtml or .vbhtml.

 @ Character symbol has to used to access the
C# code.
 C# code are case-sensitive.
 Strings must be in double quotes.
 Statement must be in semicolon.
 Variables can be declared using var keyword.

 The views which do not have a complete code
but it contains a code , which can be reused
by multiple views is called Partial Views.
 It has to be created inside a shared folder.
 The name of the partial view should start with
"_" Character.

 When we create the view, we should choose
option as
"Create as partial view".
 If we want to call the partial view from any of
our actual views,
@Html.Partial("_Myview")

ASP.NET MVC.

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