Introduction to asp.net

Jan 8, 2017Download as pptx, pdf2 likes1,135 views

The document provides an introduction to ASP.NET, including what ASP is, how ASP.NET builds on ASP, and the key benefits and components of ASP.NET. It discusses how ASP.NET web applications are executed via HTTP requests and responses, and how code is separated from presentation using code-behind files. It also summarizes the basic steps to create a simple ASP.NET application in Visual Studio.

What is ASP?
• ASP stands for Active Server Pages
• ASP is a Microsoft Technology
• ASP is a program that runs inside a web
server
• An ASP file is just the same as an HTML file
• An ASP file can contain server scripts in
addition to HTML
• Server scripts in an ASP file are executed
on the server

<!DOCTYPE html>
<html>
<body>
<%
response.write("My first ASP script!")
%>
</body>
</html>

• ASP.NET is an open-source server-side web
application framework designed for web
development to produce dynamic web
pages.
• It was developed by Microsoft to
allow programmers to build dynamic web
sites, web applications and web services.
ASP.NET

ASP.NET Benefits
• Separate Presentation from code
• Object Oriented Approach
• Event Driven Architecture
• Code Compilation
• Built in State Management
• Many others (data binding, validation, master
page etc…)

ASP.NET Execution
• ASP.NET Applications are executed via sequence of HTTP
Requests and HTTP Responses

• Client Browser request ASPX pages
• The webserver executes the ASPX page and
produce html + css + javascript
Using ASP.NET
• Simple Web Pages
• Web Forms
• MVC (model view controller)
• SignalR

ASP.NET Working
Traditional web pages
• Consist of static html, images, styles etc.
• Execute code on the client side
• Simple operations
ASP.NET Webforms
• Execute code on the server side
• Database access
• Dynamic Pages
• High Security level

Separate Presentation from code
In traditional web development, HTML and
programming code in one file
• Hard to read, understand
• Hard to test and debug
ASP.NET Splits web pages into two parts:
• .aspx file containing HTML
• Code-behind file contain the presentation logic
for the particular page

Steps to create simple ASP.NET Application
1.Start Visual Studio
2.Create “New website”
3.Add 2 text fields, 1 label, 1 button
4.Double click on the button
5.Add code to add numbers entered in text fields
6.Display the result in the label

ASP.NET Base Components
• Web Forms – Deliver ASP.NET user interface
• Web Control – the components the we can use
in our web application (eg:textbox)
• “Code-behind” – contains the server side code
• Web.config – Contains ASP.NET application
configuration
• Machine.config – contains configurations for all
applications in the server
• Global.asax – class containing application level
event handlers

ASP.NET Web Controls
ASP.NET Web controls are the smallest component part
Deliver fast and easy component-oriented development
process
HTML abstraction, but finally everything is HTML
<form runat="server" ID="frmMain">
<asp:button runat="server" ID="btn" Text="Click me!"
OnClick="btn_Click" />
</form>

Web.config
Main settings and configuration file for ASP.NET
Text based XML document
Defines:
Connection strings to any DB used by app
The default language for child pages
Whether debugging is allowed

Global.asax
Also known as ASP.NET application file
Located in the Web application root folder
Exposes application and session level events
Application_Start
Application_End
Session_Start
Session_End
etc…

ASP.NET Execution model
• First call to a page

ASP.NET Execution model
• Any other call after first

Writing code in an ASP.NET Web form is done in
three ways:
Mixed code method
Inline code method
Code-behind method

Mixed Code Method
The code is in the same file as the web content, mixed with
the HTML code
This method is not recommended as the source code is hard
to read and maintain
Inline Code Method
The code is separated in a SCRIPT section in the same file
Code-Behind Method
A separate compiled file containing the program logic of the
page
Each web page has its own code-behind page
Has the same name as the web page to which it is attached
The file extension is .aspx.cs
The two files are built into one when the application is
started

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Introduction to asp.net

1. Introduction to ASP.NET

2. What is ASP? • ASP stands for Active Server Pages • ASP is a Microsoft Technology • ASP is a program that runs inside a web server • An ASP file is just the same as an HTML file • An ASP file can contain server scripts in addition to HTML • Server scripts in an ASP file are executed on the server

3. <!DOCTYPE html> <html> <body> <% response.write("My first ASP script!") %> </body> </html>

4. • ASP.NET is an open-source server-side web application framework designed for web development to produce dynamic web pages. • It was developed by Microsoft to allow programmers to build dynamic web sites, web applications and web services. ASP.NET

5. ASP.NET Benefits • Separate Presentation from code • Object Oriented Approach • Event Driven Architecture • Code Compilation • Built in State Management • Many others (data binding, validation, master page etc…)

6. ASP.NET Execution • ASP.NET Applications are executed via sequence of HTTP Requests and HTTP Responses

7. • Client Browser request ASPX pages • The webserver executes the ASPX page and produce html + css + javascript Using ASP.NET • Simple Web Pages • Web Forms • MVC (model view controller) • SignalR

8. ASP.NET Working Traditional web pages • Consist of static html, images, styles etc. • Execute code on the client side • Simple operations ASP.NET Webforms • Execute code on the server side • Database access • Dynamic Pages • High Security level

9. Separate Presentation from code In traditional web development, HTML and programming code in one file • Hard to read, understand • Hard to test and debug ASP.NET Splits web pages into two parts: • .aspx file containing HTML • Code-behind file contain the presentation logic for the particular page

10. Simple ASP.NET Application

11. Steps to create simple ASP.NET Application 1.Start Visual Studio 2.Create “New website” 3.Add 2 text fields, 1 label, 1 button 4.Double click on the button 5.Add code to add numbers entered in text fields 6.Display the result in the label

12. ASP.NET Base Components • Web Forms – Deliver ASP.NET user interface • Web Control – the components the we can use in our web application (eg:textbox) • “Code-behind” – contains the server side code • Web.config – Contains ASP.NET application configuration • Machine.config – contains configurations for all applications in the server • Global.asax – class containing application level event handlers

13. ASP.NET Web Controls ASP.NET Web controls are the smallest component part Deliver fast and easy component-oriented development process HTML abstraction, but finally everything is HTML <form runat="server" ID="frmMain"> <asp:button runat="server" ID="btn" Text="Click me!" OnClick="btn_Click" /> </form>

14. Web.config Main settings and configuration file for ASP.NET Text based XML document Defines: Connection strings to any DB used by app The default language for child pages Whether debugging is allowed

15. Global.asax Also known as ASP.NET application file Located in the Web application root folder Exposes application and session level events Application_Start Application_End Session_Start Session_End etc…

16. ASP.NET Execution model • First call to a page

17. ASP.NET Execution model • Any other call after first

18. Coding Methods

19. Writing code in an ASP.NET Web form is done in three ways: Mixed code method Inline code method Code-behind method

20. Mixed Code Method The code is in the same file as the web content, mixed with the HTML code This method is not recommended as the source code is hard to read and maintain Inline Code Method The code is separated in a SCRIPT section in the same file Code-Behind Method A separate compiled file containing the program logic of the page Each web page has its own code-behind page Has the same name as the web page to which it is attached The file extension is .aspx.cs The two files are built into one when the application is started

Introduction to asp.net

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