missym2/samplesurveyapp

This .Net Maui app, divided into Core and UI projects, demonstrates a simple survey with 3 different types of questions, review, crud, change of orientation and localization

SampleSurveyApp

Overview

This appcontains 14 questions

• single selection, multi-selection and text types
• a review page with ability to insert user selected survey data
• generic repository

It is a .Net 7.0, .Net Maui and Xunit app that has been created as a template that includes best practices for app development. To that end it includes the following:

• Separation of Concerns: loosely coupling database and UI through the use of interfaces and MVVM architecture

• DRY principles: abstractions of database operations, use of base classes

• Modularity that allows for unit testing the data and business logic

• Dependency Inversion: High level modules are not dependent on low level modules. The TodoSampleApp uses dependency injection, interfaces and abstraction.

  Techniques

  • MVVM architecture
  • Localization wire-up with Spanish and English
  • Shell navigation
  • CRUD services with local Sqlite db
  • Orientation detection and change of UI (Portrait and Landscape)

Structure

Solution Name: SampleSurveyApp

Projects:

• SampleSurveyApp.Core Contains all data and logic-related folders, including all models, view models, services and database context for local Sqlite db. Question and Answer data must be added to the database with required information. A method is run at the beginning of the survey session to load all currently available questions and answers.

  • /Models - SurveyQuestionModel: contains questions, question type and all descriptive information for question - SurveyAnswerModel: contains all answers, linking field to appropriate question, navigation information for that response - SurveyModel: Contains information on created surveys - SurveyResponseModel: User selected survey responses are kept here

  • /ViewModels - MainPageVM - SurveyPageVM - BaseVM, Interfaces for services

  • /Services - Interfaces for services

• SampleSurveyApp.Maui Contains all user interface folders, including all views, images and services directly related to the UI. These services include navigation between views, display messages and user preferences

  • /Pages
    • MainPage
    • SurveyPage
  • /Services
    • MessageService, NavigationService, UserPreferences
    • NavigationServic
    • UserPreferences

• TodoSampleApp.Tests

  // Not complete: Contains mocks of services with verification tests. Also, contains basic test on each view model.

Libraries

• SampleSurveyApp.Core

  • CommunityToolkit.Mvvm
  • sqlite-net-pcl
  • SQLitePCLRaw.bundle_green
  • SQLitePCLRaw.provider.dynamic_cdecl

• SampleSurveyApp.Maui

  • Microsoft.Extensions.Logging.Debug
  • CommunityToolkit.Maui

• SampleSurveyApp.Tests (NO TESTS, YET)

  • Microsoft.NET.Test.Sdk
  • xunit
  • xunit.runner.visualstudio
  • coverlet.collector
  • Moq
  • FluentAssertions

Other Features

• .Core
  • Task Extension
  • Validation Rules
• .MAUI
  • Data Triggers, Event Triggers
  • Shell Flyout Menu with Menu footer and header
  • QueryProperty
  • Use of icon library and image
  • CollectionView Grouping
  • minimal but customized SplashScreen
  • minimal but customized icon