Web Application and Improvements in ASP.NET

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Web Application and Improvements in ASP.NET Using Visual Studio


The web application is a collection
of web pages comprising images, videos, and other digital assets that provide
you with relevant information. Earlier, we worked only on desktop applications
that were accessible to only a system in which they were installed and could
not be accessed by other users. They could not be hosted on the Internet either.
Web applications came into existence to overcome these shortcomings. 
A web application makes use of
the internet and becomes accessible to users from all over the world. A web
application is accessible only through a web browser, which are software
applications that enable you to display and interact with text, images, and
other information typically located on a website or a web application. 


Nowadays, most web applications are also accessible through mobile phones. Even
users with impaired vision can access web applications through screen readers
that are capable of interpreting texts as sounds. To develop web applications
one should be well conversant with ASP. NET technologies are used to
develop content-rich dynamic, and personalized websites.


This chapter discusses the usage of
web applications and improvement in ASP. NET 4.5, and coding technique in web
application. Now, let’s start our discussion with the usage of web


of Web Applications


In today’s world, the Internet plays
an important role in our daily lives. The free electronic mail (e-mail)
service, which is available on most of the Web site, has become the most common
medium of communication. People prefer to shop things online because they do
not have enough time to visit marketplaces. 
In other words, modern men have
because of the total development of the internet carried out activities besides
official work, for example, online bill payment, online railway reservation,
searching for suitable matrimonial pairs, and many more. Even offices nowadays
are developing on the Internet to get their day-to-day work done. The internet,
serving as the ultimate repository for Websites or Web applications, has made
our lives smooth in this fast-paced world by bringing everything within our


1. Business
Usage of Web Application


Nowadays, most of the application
software packages are available over the internet, whereas earlier, we had to
buy the same software in the form of compact discs (CDs). Most of the browser
interfaces support these application software packages and there is no need to
install them on the local hard drive. Therefore, nowadays, companies use such
software by paying a monthly or yearly rent to the application service


2. Modern
Usages of Web Applications


Over the years, Web applications have gone through many changes with new features and functionalities added to
them. With many new environments, the concept of blogs and community portals
came into the picture. 
Blogs are web content, which is the
textual, visual, or aural content that is regularly updated by the user based
on their experience, more similar to a diary or journal created by individuals.
People write blogs to share their experiences, poems, pictures, images, videos,
links, and so on. Blogs consist of periodic articles.
ASP. NET, as we have discussed
earlier, is a technology to develop content-rich dynamic and personalized
websites. The fundamental component of ASP. NET is a web form, which is a web
page that users can view in a browser. Now, let’s discuss it in more


Improvements in ASP.NET 4.5


Developing ASP.NET Web applications
in the .NET Framework is similar to developing Windows applications. With the
release of ASP.NET 4.5, many enhancements have been made to make a Web page
more user-friendly, secure, and dynamic, and also to make the Web site
development easier and faster. The following is the list of enhancements and
changes done in ASP.NET 4.5:


  • ASP.NET 4.5 Core Services
  • ASP.NET 4.5 Web Forms
  • ASP.NET Web Pages 2
  • General Enhancements for Web
  • Data-Related Enhancements for Web
  • IIS Express for Web Development
  • ASP.NET MVC 4, Web API, and ASP.NET Web
    Pages (Razor) are now Open Source Let’s discuss each of them in detail.


1.NET 4.5 Core Services


ASP.ET 4.5 core services include
features, such as Bundling, integrated anti-XSS encoding routines, and unification.
The important ASP.NET core services are as follows: 


Asynchronously reading and writing
HTTP requests and responses:
Specifies the capability of reading a Hypertext
Transfer Protocol (HTTP) request entity asynchronously. ASP.NET 4.5 also allows
double buffering of the HTTP request entity which integrates downstream HTTP
handlers with.aspx page and ASP.NET Model View Controller (MVC). 


2.ASP.NET 4.5 Web Forms


These have been enhanced several
times since the release of ASP.Net. In ASP.NET 4.5, the following new features are
introduced for Web Forms which are as follows:


(i). Model Binders: Allows you to bind data controls directly with data-access
methods. This feature is similar to model binding that is used in ASP.NET MVC.


(ii). Strongly typed binding
expressions in data controls:

Allows you to write strongly typed, two-way data-binding expressions for data
controls, in place of using Eval or Bind expression. In this manner, you can
use the complex properties of data controls. You can also use these expressions
with the new model-binding feature.


(iii). Unobtrusive JavaScript for
client-side validation
: Moves
the client-side validation code into a single external JavaScript file, which
reduces the page size and loads the page faster. In addition, the mis feature
provides better caching of files.


(iv). HTML-encoded data-binding expressions: Allows you to encode the data-binding expressions in e
Hypertext Markup Language (HTML) format by adding a colon(:) at the end of the
<%#prefix, which marks the start of data-binding expressions.


(v). Fallback support for Content
Distribution Networks (CDNs) in the ScriptManager control:
Tests whether the script was loaded successfully from the
CDN by using the EnableCdn property of the riptManager control. If the script
was not loaded successfully from the CDN, then it tries to load the script from
the alternate local location.


Support for HTML5 form types: Specifies the improvements done in the Web Forms controls
to take advantage of new features of HTML5: 


  • The TextBox control now supports new
    HTML5 input types, such as email and date time, as the TextMode property of the
    control has been updated.
  • The FileUpload control has been
    updated to support multiple file uploads from browsers’ HTML 5 feature.
  • Validator controls in HTML5 allow
    validation of HTML5 input elements.
  • The HTML5 elements that contain a
    URL (Uniform Resource Locator) using their attributes can now include the
    runat=server attribute. Therefore, you can use the operator to display the
    application root.
  • The UpdatePanel control has been
    modified to support the posting of HTML5 input fields. 

1. Improved paging in the GridView
: Specifies the improvement in the
paging functionality by using the AllowCustom Paging and Virtualltem Count
properties of the GridView control. These two properties eliminate the need for
the GridView control to fetch all the rows from the database every time a new
page is loaded. 


2. Enhancements to Web Forms
Specifies the following
improvements that have tended the Web Forms compilation system:


  • Includes a Control
    BuilderInterceptor class that allows you to customize the Web Forms page and
    control compilation output. 
  • Includes a
    TemplateParser.ParseTemplate method that allows you to create an ITemplate
    instance from a string of ASPX markup.


3.ASP.NET Web Pages 2


ASP.NET Web Pages 2 allows
developers to easily combine server code with HTML to create lightweight dynamic
web content. ASP.NET Web Pages 2 allows developers to easily connect to
databases and add videos and links for social networking sites to develop Websites according to modern standards. 


Let’s explore new features and enhancements in ASP.NET the Web Pages 2.


(i). New and enhanced site
Specifies the inclusion of personal
site templates, starter site templates, and upgradation of Web Pages 1
templates to run on Web Pages 2. The personal site templates provide Web pages
for a blog, photo gallery, and Twitter. On the other hand, the starter
templates have been updated to allow users to sign in to Websites by using
their Facebook, Twitter, or Windows Live accounts.


(ii). Razor syntax improvements: Provide conditional HTML attributes, which reduce the
complexity of rendering the attributes based on the values that you mention in
your code. For example, the ~/ syntax allows you to render links of dynamic
path information and URLs.


(iii). Validation: It is used for validating user input which includes
client-side validation, and it helps in improving the performance of your Website. Two new validation classes, ValidationHelper and Validator, are also
included that help in specifying the validation rules by writing a few lines of


(iv). Side-by-side support: Allows you to execute the Web Pages 1 application and Web
Pages 1 applications on the same computer.


(v). Membership and authentication: Includes two new authentication providers, OAuth and OpenID
which allow users to sign in using external site credentials, such as
Facebook, Twitter, and Windows Live.


(vi). Map helper: Allows you to use already existing search engines, such as
Bing, Google, and Yahoo, and extracts maps on your Web site. 


(vii). Mobile display modes: Allows you to create device-specific Web pages, which
render automatically on a mobile device.


4. General Enhancements for Web


The general enhancements done for
Web Development by including new features in ASP.NET 4.5 are o follows:


(i). Use the most recent Web
Specify the enhancements done in
various editors, such as HTML editor and CSS editor. Now, the HTML editor fully
supports HTML 5 elements and snippets Moreover, the CSS editor now also
supports CSS3, CSS hacks, and CSS snippets specific to vendors’ CSS extensions.


Read More…Web, WCF, and Cloud Service Using ASP. NET In Visual Studio


(ii). Test the same page,
application, or site in a variety of browsers:
Specifies that you can test your application in multiple


(iii). Quickly find the source of
rendered markup:
Specify the opening of the file in
which the markup was present by using the Page Inspector. The file gets opened
within Visual Studio IDE on choosing the rendered element.


(iv). Find snippets and code
elements quickly by using improved IntelliSense:
Specifies the display of a list of options on entering the
text in the editor, such as CSS editor and HTML editor. This feature shows
options based on the typed text.


(v). Select markup and extract it to
a user control:
Allows you to build markup to use them in more than one location and multiple times. Create and edit code
and markup more easily: This helps you in renaming the matching tag automatically if
you try to change the name of any tag. For example, if you rename the HTML
<div> tag to the <header> tag, then the corresponding closing tag
also changes automatically at the same time.


(vi). Create CSS more efficiently: Allows you to build CSS in an organized manner by using new
features, such as expansion and collapse of new sections, and the use of
hierarchical indentation. It also now includes a color selector similar to an HTML editor. 


(vii). Write JavaScript in the
JavaScript editor:
Allows you to create JavaScript
code in the JavaScript editor. The JavaScript editor includes completely new
features that improve the working experience with JavaScript in Visual Studio.
The editor provides the features, such as code outlining, brace matching, Go to
Definition, ECMAScript5, DOM IntelliSense, VSDOC signature overloads, implicit
references, set a breakpoint within a single line of code, control objects
available in global scope and View statement completion for identifiers.


(viii). Deploy web application
projects more easily:
Helps you in deploying your Web
applications easily. Moreover, you can also import publish settings from
hosting providers, such as the specification of transformations of the Web. config
file for a publish profile, storage of credentials that are in encrypted form
in the publish profile, specification of the build configuration in the publish
profile, and preview of updates related to the deployment of the Web application.


5. Data-Related Enhancements for Web


The data-related enhancements made
in ASP.NET 4.5 for Web application development are as follows:


(i). Automate validation for
frequently used data types:
 This helps you
to automate validation for commonly used data types. You can use Data Annotation
attributes to automate data types, such as e-mail address, telephone
number, and soon.


(ii). Deploy incremental database
Allows you to update the database
schema deployed with a project with the new schema automatically on its


6. IIS Express for Web Development


IIS Express is provided as a default
Web server for testing Web-based projects. It is a lightweight independent
version of IIS that includes all the essential abilities of the IIS Web server
role. However, lis Express is still an option to be used as a local Web server
during Web development; however, Microsok recommends IIS Express.




ASP.NET Web API is a Framework that
allows you to build HTTP services, such as browsers and mobile devices. It
provides an ideal platform for developing Representational State Transfer
(RESTful applications by using the NET Framework. Some of the important
features of ASP.NET Web API are as follows:


Read More…Login Controls in ASP. NET Visual Studio

(i). Easily build and consume HTTP
services that reach a broad range of clients:

Allows easy building of HTTP services that are accessible by a broad range of
clients. These services can be used by software, such as browsers, mobile
applications, and hardware, such as tablets and similar kinds of devices.
Moreover, these services have inbuilt support for the negotiation of content that
helps in determining the correct format of data.


(ii). Directly access and manipulate
HTTP requests and responses by using a modern HTTP programming model:
Allows direct access and manipulation of HTTP requests and
responses with the help of a modern HTTP programming model that is supported both
on the server and on the client. The Web APIs can be called from any .NET
Framework application using the new HttpClient API. Easily extract data from an
HTTP request: Allows you to retrieve data from different sections of an HTTP
request by using model binders. 


(iii). Enjoy a full set of routing
Provides support of full routing
capabilities in ASP.NET MVC and ASP.NET by ASP.NET Web APIs. The routing
capabilities include route parameters and constraints.


7.ASP.NET MVC 4, Web API, and
ASP.NET Web Pages (Razor) Are Now Open Source


The Apache 2.0 license is now used
by ASP.NET MVC 4, ASP.NET Web API, and ASP.NET Web Pages v2 (Razor syntax), The
important points of this development model are the following:


(i). Source code location: Specifies the location of the source code which is
available on CodePlex You can access the code by using the URL such as 
http://aspnetwebstack.codeplex.com/ and the code uses Git for version control.


(ii). See check-ins and provide
Allows the community to see and
give feedback on developer check-ins which can belong either to Microsoft or
community or both.


(iii). Check-ins are evaluated: Specifies the review of each check-in against existing
standards by the Microsoft development team for inclusion.


Read More…The Using statement Visual Studio


(iv). Microsoft development and
support continue:
Specifies that Microsoft reserved
the right of development of ASP.NET MVC, Web API, and Razor and can use them as
standalone and part of Visual Studio.


8. Coding Techniques in Web


ASP.NET 4.5 coding techniques are
the methodologies used for writing code in a Web application. ASP.NET 4.5
supports two different coding techniques, namely, the single-file page model and the code-behind page model. In the single-file coding approach, developers write
code directly on the aspx page of the application. However, the major drawback
of this coding model is that you need to write the code to implement various
functionalities of a Web application and the HTML code in a common (same)
file. To deal with this drawback of the single-file page model, ASP.NET 4.5
includes the code-behind page model, where you need to maintain separate code
files for each Web page. One file stores the code to implement the
functionalities of a Web page written in some programming language, such as
VB.NET and C#, and the other file stores the HTML markup of the Web

Let’s discuss.

  • Single-file page and
  • Code-behind model


1. The Single-File Page Model


In the single-file page model, you
need to write the language script code to implement the functionalities of a
Web application and the HTML code in the same file, but in separate sections.


2. The Code-Behind Model


In the code-behind page model, there
are two separate files, namely, Default.aspx and either one of WebForm.aspx.cs
or WebForm.aspx.vb, for ASP.NET presentation tags and programming logic to
implement the functionalities of a Web application. By default, all the
different versions of ASP.NET ASP.NET 1.0, ASP.NET 2.0, ASP.NET 3.0, and
ASP.NET 3.5 – support this model. The code-behind model in ASP.NET 4.5 is
similar to the code-behind model supported by ASP.NET 4.0.




So, friends, I hope that you liked this article and you have understood and learned Web Applications and Improvements in ASP.NET Using Visual Studio. To create computer and laptop applications and software, you need to know ASP.Net and its coding.  So that you can create software for computers, PCs, and laptops.


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