[Model View ViewModel]

by

Acknowledgement

I would take this opportunity to thank my research supervisor, family and friends for their support and guidance without which this research would not have been possible (Adams, 2004).

DECLARATION

I, [type your full first names and surname here], declare that the contents of this dissertation/thesis represent my own unaided work, and that the dissertation/thesis has not previously been submitted for academic examination towards any qualification. Furthermore, it represents my own opinions and not necessarily those of the University (Adams, 2004).

Signed __________________ Date _________________

Abstract

Information society has and will involve electronic information and dependence computer networks. The program includes a substantial proportion of resources which are allocated to information and communication activities. Globalization digital consequently, the priority of the Internet, is a phenomenon inevitably, specific information for society. In this whirlwind are attracted education systems which are beginning to adapt and to transform the electronic versions, marking transition from traditional to digital age in which earning is approached as a process that takes place during the life cycle through interactive learning environments. In the present communication, explores how use of computers beyond the traditional form of IAC (most frequently encountered form of drill & practice).

Table of Contents

ABSTRACT1

CHAPTER 01: INTRODUCTION4

Background4

Problem Statement6

Purpose of the Study8

Objective of the Study8

CHAPTER 02: LITERATURE REVIEW9

Order vs. Chaos11

The Evolution of Model-View-ViewModel12

CHAPTER 03: PRACTICAL MODEL-VIEW-VIEWMODEL DESIGN PATTERN ON APPPLICATION USING WINDOWS PRESENATATION FOUNDATION (WPF)15

Relaying Command Logic16

Listing 1. RelayCommand Class17

Listing 2. Configuration of RelayCommand with the help of lambda expressions19

ViewModel Class Hierarchy19

ViewModelBase Class21

Listing 3. Suport for Code Refactoring22

CommandViewModel Class22

Listing 4. Definition of CommandViewModel Class23

Listing 5. Render list of Commands24

Clasa MainWindowViewModel24

Listing 6. Creation of ViewModel25

Listing 7. Deleting an Workspace din UI27

Listing 8. Test Method28

Apply an View to ViewModel29

Listing 9. View Supply30

DataModel si Repository31

Listing 10. Test Method34

Listing 11. CustomerType Properties35

Listing 12. Validarea unui obiect de clasa CustomerViewModel37

Listing 13. Logica pentru Salvare pentru CustomerViewModel38

Listing 14 CollectionViewSource41

CHAPTER 04: RESULTS & FINDINGS44

The Demo Application44

Relaying Command Logic46

ViewModel Class Hierarchy50

ViewModelBase Class51

CommandViewModel Class53

MainWindowViewModel Class54

Applying a View to a ViewModel58

The Data Model and Repository59

New Customer Data Entry Form61

All Customers View67

Summary70

CHAPTER 05: CONCLUSIONS & RECOMMENDATIONS71

REFERENCES75

Chapter 01: Introduction

Background

Micro-switches are important building blocks in micro-electro-mechanical-systems (MEMS). A typical elec-trostatic micro-switch comprises two parallel conducting electrodes, one is fixed and the other is movable. When an electrical potential difference is created between the two electrodes, the induced electrostatic charge gives rise to electrostatic force which deflects the movable electrode towards the fixed electrode. In addition, the intermolecular interaction force which is directly dependent on the gap between them also acts on the movable electrode, altering its deflection. Counteracting the electrostatic and intermolecular forces is the elastic force, which tries to restore the movable electrode to its original position. Obviously, the equilibrium position of the movable electrode is determined by the balance of the elastic, electrostatic, and intermolecular forces. When the voltage increases beyond a critical value, the movable electrode becomes unstable and collapses onto the fixed electrode and consequently, the micro-switch is in the ON state. The voltage and deflection at this state are known as the pull-in voltage and pull-in deflection which are ...