CIS 375Web App Dev II

1
CIS 375Web App Dev II

• ASP .NET 2
• Introducing Web Forms

2
What is ASP.NET Web Forms?

• The ASP.NET Web Forms page framework is a
  scalable common language runtime programming
  model that can be used on the server to
  dynamically generate Web pages.
• The ASP.NET Web Forms framework provides
• The ability to create and use reusable UI
  controls that can encapsulate common
  functionality and thus reduce the amount of code
  that a page developer has to write.
• The ability for developers to cleanly structure
  their page logic in an orderly fashion (not
  "spaghetti code").
• The ability for development tools to provide
  strong WYSIWYG design support for pages (existing
  ASP code is opaque to tools).

3
Writing Your First Web Forms Page

• ASP.NET Web Forms pages are text files with an
  ______ file name extension.
• An ASP.NET page can be created by taking an
  existing HTML file and changing its file name
  extension to .aspx.
• VB Intro1.aspx Run Sample View Source

.aspx
4
Using ASP lt gt Render Blocks

• ASP.NET provides syntax compatibility with
  existing ASP pages including support for
  _________ code render blocks.
• VB Intro2.aspx Run Sample View Source
• Important Unlike with ASP, the code used within
  the above lt gt blocks is actually compiled--not
  ___________ using a script engine, resulting in
  improved performance.
• ASP.NET page developers can utilize lt gt code
  blocks to dynamically modify HTML output much as
  they can today with ASP.
• VB Intro3.aspx Run Sample View Source

lt gt
interpreted
5
Introduction to ASP.NET Server Controls

• Instead of using lt gt code blocks to program
  dynamic content, ASP.NET page developers can use
  ASP.NET server controls to program Web pages.
• Server controls are declared within an .aspx file
  using custom tags or intrinsic HTML tags that
  contain a runat_______" attribute value.
• VB Intro4.aspx Run Sample View Source
  ads.xml
• Note also that no _______-side script is
  required.
• ASP.NET enables developers to utilize richer
  custom controls on their pages, such as the
  ltaspadrotatorgt control. (see Server Controls)
• VB Intro5.aspx Run Sample View Source

server
client
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Handling Server Control Events

• Each ASP.NET server control is capable of
  exposing an _______ model containing properties,
  methods, and events.
• ASP.NET developers can use this object model to
  cleanly modify and interact with the page.
• VB Intro6.aspx Run Sample View Source
• This simple sample is functionally equivalent to
  the "Intro3" sample demonstrated earlier in this
  section.
• Note, however, how much cleaner and easier the
  code is in this new server-control-based version.

object
7
Using Custom Server Controls
45

• ASP.NET ships with ____ built-in server controls
  that can be used out of the box.
• See Web Forms Controls Reference
• Developers also can use controls developed by
  ______-party vendors.
• The following sample shows a simple calendar
  control.
• VB Intro7.aspx Run Sample View Source
  Acme.vb
• This Calendar control performs "uplevel-like"
  processing on IE 5.5 (doesnt require round trips
  back to the server when doing calendar
  navigation) and "downlevel" processing on all
  other browsers.

third
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Lists, Data, and Data Binding

• ASP.NET has a built-in set of data _____ and list
  controls for UI driven from queries against a
  __________ or other data source.
• The following demonstrates how to use the
  ltaspdatagrid runatservergt control.
• VB Intro8.aspx Run Sample View Source
• The ltaspdatalist runatservergt control enables
  end users to exactly control the structure and
  layout of each item within the list (using the
  ItemTemplate template property).
• VB Intro10.aspx Run Sample View Source

grid
database
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Form Validation Controls 1
validation

• ASP.NET provides a set of ___________ server
  controls to check input forms for errors, and
  display messages to the user.
• There are controls for specific types of
  validation, such as _______ checking or pattern
  matching, plus a RequiredFieldValidator.
• The following demonstrates how to use two
  ltasprequiredfieldvalidator runatservergt
  controls.
• VB Intro11.aspx Run Sample View Source

range
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Form Validation Controls 2

• Validation controls have both ________
  (validation on the client and on the server) and
  downlevel client support (only on the server).
• ASP.NET page developers can check the
  Page.IsValid property at run time to determine
  whether all validation server controls on a page
  are currently valid.
• This provides a simple way to determine whether
  or not to proceed with business _______.
• VB Intro12.aspx Run Sample View Source

uplevel
logic
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Code-Behind Web Forms

• ASP.NET supports two methods of authoring dynamic
  pages.
• The first is the method shown in the preceding
  samples, where the page code is physically
  declared within the originating ______ file.
• An alternative approach--known as the code-behind
  method--enables the page code to be more cleanly
  separated from the HTML content into an entirely
  separate file.
• VB Intro13.aspx Run Sample View Source
  Intro13.vb

.aspx
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Summary
Web

• ASP.NET _____ Forms provide an easy and powerful
  way to build dynamic Web UI.
• ASP.NET Web Forms pages can target any ________
  client (there are no script library or cookie
  requirements).
• ASP.NET Web Forms pages provide syntax
  compatibility with existing _____ pages.
• ASP.NET _______ controls provide an easy way to
  encapsulate common functionality.
• ASP.NET ships with ___ built-in server controls.
  Developers can also use controls built by third
  parties.
• ASP.NET server controls can automatically project
  both uplevel and ___________ HTML.
• ASP.NET _________ provide an easy way to
  customize the look and feel of list server
  controls.
• ASP.NET __________ controls provide an easy way
  to do declarative client or server data
  validation.

browser
ASP
server
45
downlevel
templates
validation