Web forms are a vital part of ASP.NET applications and are used to create the web pages that clients request. Web forms allow developers to create web applications using a similar control-based interface as Windows applications. The ASP.NET page processing model includes initialization, validation, event handling, data binding, and cleanup stages. The page acts as a container for other server controls and includes elements like the page header.
Topics Covered
==============================
Overview of .NET
Overview of ASP.NET
Creating an ASP.NET Web Form
Adding Event Procedures
Validating User Input
Topics Covered
==============================
Overview of .NET
Overview of ASP.NET
Creating an ASP.NET Web Form
Adding Event Procedures
Validating User Input
Using this presentation you will learn dividing the browser window into different parts(frame). With frames, several Web pages can be displayed in the same browser window.
What is the DOM?
The DOM is a W3C (World Wide Web Consortium) standard.
The DOM defines a standard for accessing documents:
"The W3C Document Object Model (DOM) is a platform and language-neutral interface that allows programs and scripts to dynamically access and update the content, structure, and style of a document."
The W3C DOM standard is separated into 3 different parts:
Core DOM - standard model for all document types
XML DOM - standard model for XML documents
HTML DOM - standard model for HTML documents
The HTML DOM (Document Object Model)
When a web page is loaded, the browser creates a Document Object Model of the page.
The HTML DOM model is constructed as a tree of Objects.
With the HTML DOM, JavaScript can access and change all the elements of an HTML document.
This presentation gives introduction to ADO.Net.
Basic introduction to connected & Disconnected architecture.
and explain the each every component in Ado.net
This contains about
- what is MVC?
- Why people are preferring MVC Application
- Tools and Softwares needs to create MVC Web application
- Differences between ASP.NET and ASP.NET MVC
- Technologies used to create MVC Application
Using this presentation you will learn dividing the browser window into different parts(frame). With frames, several Web pages can be displayed in the same browser window.
What is the DOM?
The DOM is a W3C (World Wide Web Consortium) standard.
The DOM defines a standard for accessing documents:
"The W3C Document Object Model (DOM) is a platform and language-neutral interface that allows programs and scripts to dynamically access and update the content, structure, and style of a document."
The W3C DOM standard is separated into 3 different parts:
Core DOM - standard model for all document types
XML DOM - standard model for XML documents
HTML DOM - standard model for HTML documents
The HTML DOM (Document Object Model)
When a web page is loaded, the browser creates a Document Object Model of the page.
The HTML DOM model is constructed as a tree of Objects.
With the HTML DOM, JavaScript can access and change all the elements of an HTML document.
This presentation gives introduction to ADO.Net.
Basic introduction to connected & Disconnected architecture.
and explain the each every component in Ado.net
This contains about
- what is MVC?
- Why people are preferring MVC Application
- Tools and Softwares needs to create MVC Web application
- Differences between ASP.NET and ASP.NET MVC
- Technologies used to create MVC Application
ASP.NET Web API is the de facto framework for building HTTP-based services in the .NET ecosystem. With its WCF and MVC lineage, Web API brings to the table better architecture, easier configuration, increased testability, and as always, it's customizable from top to bottom. But to properly use Web API it is not enough to get familiar with its architecture and API, you also need to really understand what HTTP is all about. HTTP is the most common application layer protocol in the world, and yet, not many web developers are familiar with HTTP concepts such as of chunking, caching, and persisted connections. In this full-day tutorial, we will focus on designing and implementing HTTP-based services with ASP.NET Web API, and you will learn how to better use it to implement the features provided by HTTP.
Overview of ASP.NET
An ASP.NET Page
Server Controls
User Controls
Validation
Master Pages
Themes & skins
Page Cycle Events
Menu, Navigation & Sitemaps
Some cool new ASP.NET 2 Server Controls
CyberLab Training Division :
ASP.NET is a web application framework developed and marketed by Microsoft to allow programmers to build dynamic web sites. It allows you to use a full featured programming language such as C# or VB.NET to build web applications easily.
This tutorial covers all the basic elements of ASP.NET that a beginner would require to get started.
Audience
This tutorial has been prepared for the beginners to help them understand basic ASP.NET programming. After completing this tutorial you will find yourself at a moderate level of expertise in ASP.NET programming from where you can take yourself to next levels.
Prerequisites
Before proceeding with this tutorial, you should have a basic understanding of .NET programming language. As we are going to develop web-based applications using ASP.NET web application framework, it will be good if you have an understanding of other web technologies such as HTML, CSS, AJAX. etc
ASP.NET supports three different development models:
Web Pages, MVC (Model View Controller), and Web Forms.
For More Details.
Visit: http://www.cyberlabzone.com
Overview of ASP.Net by software outsourcing company indiaJignesh Aakoliya
This presentation provides overview of ASP.NET for software development - by software outsourcing company India, iFour Technolab Pvt. Ltd. - http://www.ifourtechnolab.com
CyberLab Training Division :
ASP.NET is a web application framework developed and marketed by Microsoft to allow programmers to build dynamic web sites. It allows you to use a full featured programming language such as C# or VB.NET to build web applications easily.
This tutorial covers all the basic elements of ASP.NET that a beginner would require to get started.
Audience
This tutorial has been prepared for the beginners to help them understand basic ASP.NET programming. After completing this tutorial you will find yourself at a moderate level of expertise in ASP.NET programming from where you can take yourself to next levels.
Prerequisites
Before proceeding with this tutorial, you should have a basic understanding of .NET programming language. As we are going to develop web-based applications using ASP.NET web application framework, it will be good if you have an understanding of other web technologies such as HTML, CSS, AJAX. etc
ASP.NET supports three different development models:
Web Pages, MVC (Model View Controller), and Web Forms.
For More Details.
Visit: http://www.cyberlabzone.com
Integrating ASP.NET AJAX with SharePointRob Windsor
SharePoint provides a great infrastructure for quickly building intranet and Internet applications. ASP.NET AJAX provides a foundation for creating highly productive Web interfaces. Combined they are two great tastes that taste great together! In this session we will cover the basics of working with ASP.NET AJAX inside of SharePoint 2007. We will take a look at how to prepare a Web Application for ASP.NET AJAX, and how to use various ASP.NET AJAX tools such as the JavaScript libraries, JSON-enabled Web services, and UpdatePanels to build add rich interactivity to your SharePoint sites.
CyberLab Training Division :
ASP.NET is a web application framework developed and marketed by Microsoft to allow programmers to build dynamic web sites. It allows you to use a full featured programming language such as C# or VB.NET to build web applications easily.
This tutorial covers all the basic elements of ASP.NET that a beginner would require to get started.
Audience
This tutorial has been prepared for the beginners to help them understand basic ASP.NET programming. After completing this tutorial you will find yourself at a moderate level of expertise in ASP.NET programming from where you can take yourself to next levels.
Prerequisites
Before proceeding with this tutorial, you should have a basic understanding of .NET programming language. As we are going to develop web-based applications using ASP.NET web application framework, it will be good if you have an understanding of other web technologies such as HTML, CSS, AJAX. etc
ASP.NET supports three different development models:
Web Pages, MVC (Model View Controller), and Web Forms.
For More Details.
Visit: http://www.cyberlabzone.com
Kubernetes & AI - Beauty and the Beast !?! @KCD Istanbul 2024Tobias Schneck
As AI technology is pushing into IT I was wondering myself, as an “infrastructure container kubernetes guy”, how get this fancy AI technology get managed from an infrastructure operational view? Is it possible to apply our lovely cloud native principals as well? What benefit’s both technologies could bring to each other?
Let me take this questions and provide you a short journey through existing deployment models and use cases for AI software. On practical examples, we discuss what cloud/on-premise strategy we may need for applying it to our own infrastructure to get it to work from an enterprise perspective. I want to give an overview about infrastructure requirements and technologies, what could be beneficial or limiting your AI use cases in an enterprise environment. An interactive Demo will give you some insides, what approaches I got already working for real.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
State of ICS and IoT Cyber Threat Landscape Report 2024 previewPrayukth K V
The IoT and OT threat landscape report has been prepared by the Threat Research Team at Sectrio using data from Sectrio, cyber threat intelligence farming facilities spread across over 85 cities around the world. In addition, Sectrio also runs AI-based advanced threat and payload engagement facilities that serve as sinks to attract and engage sophisticated threat actors, and newer malware including new variants and latent threats that are at an earlier stage of development.
The latest edition of the OT/ICS and IoT security Threat Landscape Report 2024 also covers:
State of global ICS asset and network exposure
Sectoral targets and attacks as well as the cost of ransom
Global APT activity, AI usage, actor and tactic profiles, and implications
Rise in volumes of AI-powered cyberattacks
Major cyber events in 2024
Malware and malicious payload trends
Cyberattack types and targets
Vulnerability exploit attempts on CVEs
Attacks on counties – USA
Expansion of bot farms – how, where, and why
In-depth analysis of the cyber threat landscape across North America, South America, Europe, APAC, and the Middle East
Why are attacks on smart factories rising?
Cyber risk predictions
Axis of attacks – Europe
Systemic attacks in the Middle East
Download the full report from here:
https://sectrio.com/resources/ot-threat-landscape-reports/sectrio-releases-ot-ics-and-iot-security-threat-landscape-report-2024/
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
"Impact of front-end architecture on development cost", Viktor TurskyiFwdays
I have heard many times that architecture is not important for the front-end. Also, many times I have seen how developers implement features on the front-end just following the standard rules for a framework and think that this is enough to successfully launch the project, and then the project fails. How to prevent this and what approach to choose? I have launched dozens of complex projects and during the talk we will analyze which approaches have worked for me and which have not.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
Search and Society: Reimagining Information Access for Radical FuturesBhaskar Mitra
The field of Information retrieval (IR) is currently undergoing a transformative shift, at least partly due to the emerging applications of generative AI to information access. In this talk, we will deliberate on the sociotechnical implications of generative AI for information access. We will argue that there is both a critical necessity and an exciting opportunity for the IR community to re-center our research agendas on societal needs while dismantling the artificial separation between the work on fairness, accountability, transparency, and ethics in IR and the rest of IR research. Instead of adopting a reactionary strategy of trying to mitigate potential social harms from emerging technologies, the community should aim to proactively set the research agenda for the kinds of systems we should build inspired by diverse explicitly stated sociotechnical imaginaries. The sociotechnical imaginaries that underpin the design and development of information access technologies needs to be explicitly articulated, and we need to develop theories of change in context of these diverse perspectives. Our guiding future imaginaries must be informed by other academic fields, such as democratic theory and critical theory, and should be co-developed with social science scholars, legal scholars, civil rights and social justice activists, and artists, among others.
1. WEB FORMS
ASP.NET pages (officially known as web forms) are a
vital part of an ASP.NET application.
Provide the actual output of a web application—the
web pages that clients request and view in their browsers.
Web forms allow you to create a web application using
the some control-based interface as a Windows
application.
1
2. Page Processing
Goal of ASP.NET developers is to develop
web forms in the same way that Windows
developers can build applications.
Web applications are very different from
traditional rich desktop/client applications:
Web applications execute on the server.
Web applications are stateless.
2
3. HTML Forms
Simplest way to send client-side data to the server is
using a <form> tag
Inside the <form> tag, can place other <input> tags to
represent basic user interface ingredients
3
4. HTML Forms cont..
ASP.NET uses control model.
string firstName = txtFirstName.Text;
4
5. Dynamic User Interface
Control model makes life easier for retrieving form information
In classic ASP insert a script block that would write the raw HTML
string message = "<span style="color:Red">Welcome " +
FirstName + " " + LastName + "</span>";
Response.Write(message);
On the other hand, with Label control in ASP.NET
<asp:Label id="lblWelcome" runat="server" />
Now you can simply set its properties
lblWelcome.Text = "Welcome " + FirstName + " " + LastName;
lblWelcome.ForeColor = Color.Red;
Note: Not Necessary to KNOW HTML markup syntax.
5
Hides the low-level HTML details.
6. The ASP.NET Event Model
Classic ASP uses a linear processing model.
Code execution is from start to end.
More code for even simple web page.
(Example of three buttons on HTML form)
script code must determine which button is clicked
and execute code accordingly
ASP.NET provides event-driven model.
6
7. The ASP.NET Event Model cont..
Here’s a brief outline of event driven model:
1. Your page runs for the first time. ASP.NET
creates page, & control objects, the
initialization code executes, and then the page
is rendered to HTML and returned to the
client.
2. At some point, the user does something that
triggers a postback, such as clicking a button.
& page is submitted with all the form data.
3. ASP.NET intercepts the returned page and re-
7 creates the page objects.
8. The ASP.NET Event Model cont..
4. Next, ASP.NET checks what operation
triggered the postback, and raises the
appropriate event procedure.
5. The modified page is rendered to HTML
and returned to the client. The page
objects are released from memory.
If another postback occurs, ASP.NET
repeats the process in steps 2 through 4.
9. POSTBACK
1.User request web form from server
2.Web server respond back with requested web form.
3.User enters the data and submits the form to web server.
4.Web server process the form and sends the result back
to the client
Step 3 ????
Step 3 & Step 4 ????
PostBack is the name given to the process of submitting
an ASP.NET page to the server for processing.
10. Automatic Postbacks
All client action cannot be handled. e.g. mouse
movement because of server side processing.
If want to do, can use Java Script or Ajax.
ASP.NET web controls extend this model with an
automatic postback feature.
To use automatic postback set the AutoPostBack
property of a web control to true (the default is false)
ASP.NET adds a JavaScript function to the rendered
HTML page named __doPostBack() (AutoPostBack
=true)
10
11. View State
View state solves another problem that occurs
because of the stateless nature of HTTP—lost
changes.
ASP.NET has its own integrated state
serialization mechanism.
ASP.NET examines all the properties, if changed
makes a note of this information in a name/value
collection.
ASP.NET takes all the information it has
collected and then serializes it as a Base64 string.
11
12. View State cont..
The next time the page is posted back, ASP.NET follows these
steps:
1. ASP.NET re-creates the page and control objects based on
its defaults (first requested state)
2. Next, ASP.NET deserializes the view state information and
updates all the controls.
3. ASP.NET adjusts the page according to the posted back
form data.
4. Now event-handling code can get involved.
e.g. code can react to change the page, move to a new
page, or perform a completely different operation.
12
15. View State cont..
Note: Even if you set EnableViewState to false, the
control can still hold onto a smaller amount of
view state information.
This privileged view state information is known as
control state, and it can never be disabled.
Note: It is absolutely essential to your success as an
ASP.NET programmer to remember that the web form
is re-created with every round-trip. It does not persist
or remain in memory longer than it takes to render a
single request.
15
16. Web Forms Processing Stages
On the server side, processing an ASP.NET web
form takes place in stages.
The following list shows the major processing
stages
• Page framework initialization
• User code initialization
• Validation
• Event handling
• Automatic data binding
• Cleanup
16
18. Page Framework Initialization
ASP.NET first creates the page
Generates all the controls defined
ASP.NET deserializes the view state information
(not being requested for the first if it’s postback),
Next Page.Init event fires (rarely handled by the
web page, because it’s still too early to perform
page initialization)
18
19. User Code Initialization
At this stage of the processing, the Page.Load event is fired.
The Page.Load event always fires, regardless of whether the
page is being requested for the first time or whether it is being
requested as part of a postback.
To determine the current state of the page, check the
IsPostBack property of the page, which will be false the first
time the page is requested. Here’s an example:
if (!IsPostBack)
{
// It's safe to initialize the controls for the first time.
FirstName.Text = "Enter your name here";
}
19
20. Validation
ASP.NET includes validation controls
that can automatically validate other user
input controls and display error messages.
Validation controls fire after the page is
loaded but before any other events take
Place.
validation controls are self-sufficient
20
21. Event Handling
At this point, the page is fully loaded and validated.
ASP.NET will now fire all the events since the last postback
Immediate response events
Change events
ASP.NET’s event model is still quite different from a traditional Windows
environment
If you change text in the text box and click submit button, ASP.NET raises all
of the following events (in this order):
• Page.Init
• Page.Load
• TextBox.TextChanged
• Button.Click
• Page.PreRender
21 • Page.Unload
22. Automatic Data Binding
When you use the data source controls, ASP.NET
automatically performs updates and queries against your data
source as part of the page life cycle.
Changes are performed after all the control events have
been handled but just before the Page.PreRender event fires.
After the Page.PreRender event fires, the data source
controls perform their queries and insert the retrieved data
into linked controls.
This is the last stop in the page life cycle.
Page.PreRender is last action before the page is rendered
into HTML.
22
23. Cleanup
At the end of its life cycle, the page is rendered to HTML.
Page.Unload event is fired.
At this point, the page objects are still available, but the
final HTML is already rendered and can’t be changed.
garbage collection service that runs periodically to release
memory tied to objects
unmanaged resources must be to release explicitly (e.g.
Windows file handles and ODBC database connections)
When the garbage collector collects the page, the
Page.Disposed event fires.
23
24. Summary of Web Forms Processing Stages
• Page framework initialization
• User code initialization
• Validation
• Event handling
• Automatic data binding
• Cleanup
24
25. The Page As a Control Container
To render a page, the web form needs to collaborate with all
its constituent controls.
When ASP.NET first creates a page, it inspects the .aspx file
for each element it finds with the runat="server" attribute, it
creates and configures a control object, and then it adds this
control as a child control of the page.
Page.Controls collection contains all child controls on the
page
ASP.NET models the entire page using control objects,
including elements that don’t correspond to server-side
25
content.
26. The Page Header
Web form can also contain a single HtmlHead
control, which provides server-side access to the <head>
tag.
Visual Studio default is to always make the <head> tag
into a server-side control
Head includes other details such as the title, metadata
tags (useful for providing keywords to search engines)
Title: This is the title of the HTML page
StyleSheet: IStyleSheet object that represents inline
26
styles
27. The Page Class
All web forms are actually instances of the ASP.NET Page class
(System.Web.UI namespace)
Code-behind class explicitly derives from System.Web.UI.Page.
means that every web form you create is equipped with an enormous
amount of out-of-the-box functionality
Page class gives your code the following extremely useful properties:
• Session
• Application
• Cache
• Request
• Response
• Server
• User
27 • Trace
28. Session, Application, and Cache
The Session object is an instance of the
System.Web.SessionState.HttpSessionState class.
The Session object provides dictionary-style access to a set of
name/value pairs.
Session state is often used to maintain user specific information.
The Application object is an instance of the
System.Web.HttpApplicationState class
Data is global to the entire application.
Cache object is an instance of the System.Web.Caching.Cache
class.
Scalable storage mechanism because ASP.NET can remove
objects if server memory becomes scarce.
28
29. Request Object
An instance of the System.Web.HttpRequest
class.
Object represents the values and properties of
the HTTP request
contains all the URLparameters and all other
information sent by a client.
Much of the information provided by the
Request object is wrapped by higher-level
abstractions.
Can examine cookies
29
30. Request Object cont..
Property Description
AnonymousID identifies the current user
ApplicationPath ApplicationPath gets the ASP.NET
and application’s virtual directory (URL), while
PhysicalApplicat PhysicalApplicationPath gets the “real”
ionPath directory.
Browser provides a link to an
HttpBrowserCapabilities object
ClientCertificate HttpClientCertificate object that gets the
security certificate for the current request
Cookies gets the collection of cookies sent with this
30
request
31. Request Object cont..
Property Description
Form Represents the collection of form variables
that were posted back to the page.
Headers and collection of HTTP headers and server
ServerVariables variables, indexed by name.
IsAuthenticated & These return true if the user has been
IsSecureConnectio successfully authenticated and if the user is
n connected over SSL (Secure Sockets Layer).
IsLocal This returns true if the user is requesting the
page from the local computer.
QueryString provides the parameters that were passed
along with thequery string.
31
32. Request Object cont..
Property Description
Url and Uri object that represents the current
UrlReferrer address for
the page and the page where the user
is coming from
UserAgent a string representing the browser type.
UserHostAddre get the IP address and the DNS name
ss and of the remote client
UserHostName
UserLanguages provides a sorted string array that lists
the client’s language preferences.
32
33. Response object
Response object is an instance of the
System.Web.HttpResponse class
HttpResponse does still provide some
important functionality—namely, cookie and
Redirect() method
33
34. Response object cont..
Member Description
BufferOutput Can set true or false
Cache HttpCachePolicy object that allows you to configure
output caching
Cookies collection of cookies sent with the response
Expires and these properties to cache the rendered HTML
ExpiresAbsolute
sClientConnected Boolean value indicating whether the client is still
connected to the server
Redirect() transfers the user to another page in your application
or a different website
Write() write text directly to the response
stream.
BinaryWrite() and allow you to take binary content from a byte array
WriteFile()
34
or from a file and write it directly to the response
stream
35. Server Object
Server object is an instance of the
System.Web.HttpServerUtility class.
Member Description
MachineName Computer name of the computer on which
the page is running.
GetLastError() Retrieves the exception object for the most
recently encountered error.
HtmlEncode() Changes an ordinary string into a string
and with legal HTML characters (and back
HtmlDecode() again).
UrlEncode() and Changes an ordinary string into a string
UrlDecode() with legal URL characters (and back
35
again).
36. Server Object cont..
Member Description
UrlTokenEncode Performs the same work as
() and UrlEncode() and UrlDecode(), except
UrlTokenDecode they work on a byte array that
() contains Base64-encoded data.
MapPath() Returns the physical file path that
corresponds to a specified virtual file
path.
Transfer() Transfers execution to another web
page in the current application.
36
37. Common HTML Entities
Result Description Encoded
Entity
Non breaking space
< Less-than symbol <
> Greater-than symbol >
& Ampersand &
" Quotation mark &
37
38. User Object
User object represents information about the user
making the request of the web server
allows you to test that user’s role membership.
Implements System.Security.Principal.Iprincipal
can authenticate a user based on specific class
depends Windows account information using IIS or
through cookie-based authentication with a
dedicated login page.