On-Line Video StoreOn-Line Video Store

Vitaly PanorVitaly Panor

Tal JoffeTal JoffeSeptember, 2009September, 2009

Project Supervisor: Victor Kulikov

VTVSVTVS

Project Goals

Introduction

Working environment

Design Approach

Data access Layer

Business Logic Layer

Presentation Layer

Summary

OutlineOutline

Our project goals were:

Creating an easy to use online video store.

Learning how to design and create a complete web site from bottom to top

Getting familiar with ASP.NET environment, C# and SQL code, web service, paging and working with a relational database.

Project GoalsProject Goals

VTVS - Vitaly and Tal’s Video Store - is an online streaming video store, where users are able to purchase movies and watch them on-line.

IntroductionIntroduction

Our site, unlike the existing similar sites, focuses on the inexperienced web surfer.

We provide a very simple easy-to-use interface without any distractions.

Introduction (cont.)Introduction (cont.)

Various features were implemented, such as providing detailed information for each movie, searching a movie by different parameters, uploading and editing a movie, registering users and more.

Application Tier:.Net Framework 3.5 (C#)ASP.NET 3.5

WorkingWorking environmentenvironment

Database Tier:Microsoft Enterprise SQL server

2005.Development environment:

Microsoft Visual Studio 2008

Design ApproachDesign Approach

Three-Tiers ArchitectureThree-Tiers Architecture

•ScalabilityScalability•Improved SecurityImproved Security•RobustnessRobustness

Data Access Layer (DAL)Data Access Layer (DAL)in this layer information is stored and retrieved from the database

•Database:

we used a local SQL database created in the visual studio environment

•DAL

we implemented the DAL as a Web Service that consists of Strongly Typed Dataset and classes that uses it.

DatabaseDatabase

DAL – DataSetDAL – DataSet

DAL – Web ServiceDAL – Web Service

We implemented the DAL in our project as a Web Service.

We decided to use it since it meets two important demands in a simple way.

The demands are that:

•It implements the singleton pattern

•It allows the DAL to be completely separated from the rest of the implementation

DAL – Web Service (cont.)DAL – Web Service (cont.)

The alternative of using the Web Service was creating our own singleton class that will implement the same methods.

DAL – Web Service (cont.) DAL – Web Service (cont.)

In the Web Service Implementation we created several classes on top of the main class – Service – that use the DataSet to access the database each Class access the appropriate table adaptor methods.

DAL – Web Service (cont.)DAL – Web Service (cont.)

Business Logic Layer (BLL)Business Logic Layer (BLL)this layer contains the logic of the web application, i.e. command processing, logical decisions and calculation. the BLL also moves data between the DAL and the Presentation Layer

Presentation LayerPresentation Layerthis layer represents the user interface (UI). Meaning it translates tasks and results to something the user can understand

Site mapMainForm

LoginFormNewUserForm DisplayMovieFormSearchResultsForm

AdminViewFormBuyerViewForm

PurchaseCreditForm EditMovieForm

ModeratorViewForm

PlayMovieForm

About ContactUs

UploaderViewForm

What we had learnedWhat we had learned

In our project we had learned how to:

•Design and create a relational database.•Write SQL queries.•Write C# code.•Use ADO.NET objects to access the data in the database.•Create an ASP.NET Web Service and consume it.•Create an ASP.NET web site•Create and Design web forms and master page using HTML and CSS code along with the visual studio designer.•Design a web site project using the 3-Tiers approach and implementing it using all of the above.

What we would have done What we would have done differentlydifferently

• Improving the code design - abstraction, encapsulation, modularity, design patterns….

• Improving the UI - countless researches have been made on the subject. We have only covered a small fraction.

•Efficiency – there is always room for improvements. Both DAL and BLL can be made more efficient.

Thank You!Thank You!