Asp.Net Introduction

1. Building Effective Web
Applications with ASP .Net 3.5
ASIM SHAHZAD

2. Overview of Data Access
(Chapter 8)
• 99.99% of apps involve some type of data
• We can use data bound controls to
generate our web application’s UI
• SQL Server Express is a royalty free
database included with VS2008 or Visual
Web Developer.

3. Types of Data bound Controls
p337
• Lists
• Tabular
• Hierarchical

4. Bind Controls to a DataSource
p350
• SQLDataSource
• LinqDataSource
• AccessDataSource
• ObjectDataSource
• XmlDataSource
• SiteMapDataSource

5. Data Driven App Demos
• Code From Chapter 8
1.Add/Configure a SQLDataSource
2.List Controls
3.Tabular
4.Hierarchical Data
This demo uses an xml file as a data
source.
5.CRUD Sample – Employee Directory

6. Break
• We will look discuss LINQ after break

7. What is LINQ?
• LINQ stands for Language Integrated
Query
• A general purpose query facility to
query relational data, XML data,
objects/collections.
• New in .Net Framework 3.5 – must
target .Net Framework 3.5
• Based on standard query operators
• LINQ query syntax resembles
backwards SQL statements

8. LINQ Architecture
C# 3.0 VB 9.0
.NET Language Integrated Query Others…
LINQ to LINQ to LINQ to LINQ to
Objects DataSets SQL XML
<book>
<title/>
<author/>
<year/>
<price/>
</book>
Objects Relational
XML

9. Benefits of Using LINQ
• May not need to build an entire DAL
(data access layer)
• Much easier to query XML – don’t
have to use Xpath
• Work with data in a consistent way –
whether it is SQL Server data, XML
data, ADO .Net dataset, an object
collection, or data in memory
• Offers compile time checking,
autocompletion, and Intellisense

10. New C# Language Features
that Support LINQ p902
• Automatic properties
• Initializers
• Type Inference
• Anonymous types

11. Three Parts of a LINQ Query
• Obtain the data source
• Create the query
• Execute the query

12. What’s a DataContext?
• The DataContext is the source of all
entities mapped over a database
connection
• It tracks changes that you made to all
retrieved entities and maintains an
"identity cache" that guarantees that
entities retrieved more than one time are
represented by using the same object
instance.

13. LINQ Demos from MSDN
Library Help Files
• How to: Query an ArrayList with LINQ
• LINQ to XML vs. DOM
• Paste as XML C# Addin

14. C# Building the Paste Xelement
as XML Addin
• http://www.hanselman.com/blog/PasteXM
LAsXLinqXElementVisualStudioAddIn.asp
x

15. Creating LINQ to SQL Entities
• Building Entities with the Object Relational
Designer p922
• Using the LINQDataSource control
p926

16. Other MVC Resources
• MSDN Virtual Lab on Introduction to
.Net MVC
• Discussion of .Net MVC can be found
on www.asp.net/mvc/
• Book - Design Patterns by Gamma,
Helm, Johnson, and Vlissides

17. Other LINQ resources
• www.thinqlinq.com
• Book – LINQ in Action
• Msdn.microsoft.com articles on LINQ

18. Optional Take Home Class
Exercise
• Do any one of the following:
1.MSDN Virtual Lab “Using LINQ to SQL
with the .Net Framework 3.5 and Visual
Studio 2008” Event ID: 1032376015
(msevents.microsoft.com)
2. Download lab manual from #1, install
Northwind database and do lab on your
pc.
3.Do VS2008 Training Kit Lab “LinqToSql”

19. Questions ?
• Feel free to contact me at
asimshahzad78@yahoo.com
• Thank you!