Initial Commit

ViewModel/Dialogs/AddDepositViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using GalaSoft.MvvmLight;
+
+namespace DebtMgr.ViewModel.Dialogs
+{
+    public class AddTransactionViewModel : ViewModelBase
+    {
+    }
+}

ViewModel/Dialogs/AddTransactionViewModel.cs

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+using DebtMgr.Model;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.Command;
+using SQLiteNetExtensions.Extensions;
+using System;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Windows;
+
+namespace DebtMgr.ViewModel.Dialogs
+{
+    public class AddTransactionViewModel : ViewModelBase
+    {
+        #region Public Properties
+
+        public event EventHandler RequestClose;
+        public TransactionType DialogMode { get; set; }
+
+        public Person PreselectedPerson { get; set; }
+
+        #endregion
+
+        #region WindowTitle (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="WindowTitle" />
+        /// </summary>
+        private string _windowTitle;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string WindowTitle
+        {
+            get { return _windowTitle; }
+
+            set
+            {
+                _windowTitle = value;
+                RaisePropertyChanged(() => WindowTitle);
+            }
+        }
+
+        #endregion
+
+        #region AmountTextBoxText (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="AmountTextBoxText" />
+        /// </summary>
+        private string _amountTextBoxText;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string AmountTextBoxText
+        {
+            get
+            {
+                return _amountTextBoxText;
+            }
+
+            set
+            {
+                _amountTextBoxText = value;
+                RaisePropertyChanged(() => AmountTextBoxText);
+                AddTransactionButtonClickCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Gets the amount text box text as number representation. </summary>
+        ///
+        /// <value> The amount text box text number representation. </value>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public double AmountTextBoxTextNumberRepresentation
+        {
+            get
+            {
+                if (string.IsNullOrWhiteSpace(_amountTextBoxText)) return 0.0;
+                return double.Parse(_amountTextBoxText, CultureInfo.InvariantCulture);
+            }
+        }
+
+        #endregion
+        #region DescriptionTextBoxText (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="DescriptionTextBoxText" />
+        /// </summary>
+        private string _descriptionTextBoxText;
+
+        /// <summary>
+        /// DescriptionTextBoxText
+        ///</summary>
+        public string DescriptionTextBoxText
+        {
+            get { return _descriptionTextBoxText; }
+
+            set
+            {
+                _descriptionTextBoxText = value;
+                RaisePropertyChanged(() => DescriptionTextBoxText);
+                AddTransactionButtonClickCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        #endregion
+        #region DatePickerSelectedDate (DateTime?) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="DatePickerSelectedDate" />
+        /// </summary>
+        private DateTime? _datePickerSelectedDate;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public DateTime? DatePickerSelectedDate
+        {
+            get { return _datePickerSelectedDate; }
+
+            set
+            {
+                _datePickerSelectedDate = value;
+                RaisePropertyChanged(() => DatePickerSelectedDate);
+                AddTransactionButtonClickCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        #endregion
+
+        #region PersonComboBoxItemSource (List<Person>) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="PersonComboBoxItemSource" />
+        /// </summary>
+        private List<Person> _personComboBoxItemSource;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public List<Person> PersonComboBoxItemSource
+        {
+            get { return _personComboBoxItemSource; }
+
+            set
+            {
+                _personComboBoxItemSource = value;
+                RaisePropertyChanged(() => PersonComboBoxItemSource);
+            }
+        }
+
+        #endregion
+        #region PersonComboBoxSelectedItem (Person) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="PersonComboBoxSelectedItem" />
+        /// </summary>
+        private Person _personComboBoxSelectedItem;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public Person PersonComboBoxSelectedItem
+        {
+            get { return _personComboBoxSelectedItem; }
+
+            set
+            {
+                _personComboBoxSelectedItem = value;
+                RaisePropertyChanged(() => PersonComboBoxSelectedItem);
+                AddTransactionButtonClickCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        #endregion
+
+        #region AddTransactionButtonClickCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="AddTransactionButtonClickCommand" />
+        /// </summary>
+        private RelayCommand _addTransactionButtonClickCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand AddTransactionButtonClickCommand => _addTransactionButtonClickCommand ?? (_addTransactionButtonClickCommand = new RelayCommand(AddTransactionButtonClickCommand_Execute, AddTransactionButtonClickCommand_CanExecute));
+
+        private bool AddTransactionButtonClickCommand_CanExecute()
+        {
+            if (AmountTextBoxTextNumberRepresentation < 0.01) return false;
+            if (string.IsNullOrWhiteSpace(DescriptionTextBoxText)) return false;
+            if (PersonComboBoxSelectedItem == null) return false;
+            if (DatePickerSelectedDate == null) return false;
+
+            return true;
+        }
+
+        private void AddTransactionButtonClickCommand_Execute()
+        {
+            if (AddTransactionButtonClickCommand_CanExecute())
+            {
+                try
+                {
+                    var person = App.Database.Get<Person>(PersonComboBoxSelectedItem.Id);
+                    App.Database.GetChildren(person);
+
+                    if (DatePickerSelectedDate != null)
+                        person.Transactions.Add(new Transaction
+                        {
+                            Amount = AmountTextBoxTextNumberRepresentation,
+                            Type = DialogMode,
+                            Description = DescriptionTextBoxText,
+                            PersonId = person.Id,
+                            Time = DatePickerSelectedDate.Value
+                        });
+
+                    App.Database.InsertOrReplaceWithChildren(person);
+                    RequestClose?.Invoke(null, null);
+                    App.Locator.MainView.UpdatePersonsList();
+                }
+                catch (Exception)
+                {
+                    MessageBox.Show("Something bad happened", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                }
+                
+
+            }
+        }
+
+        #endregion
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Default constructor. </summary>
+        ///
+        /// <remarks>   Andre Beging, 10.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public AddTransactionViewModel()
+        {
+            UpdatesPersonsComboBox();
+        }
+
+        #region UpdatesPersonsComboBox()
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Updates persons combo box. </summary>
+        ///
+        /// <remarks>   Andre Beging, 09.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public void UpdatesPersonsComboBox()
+        {
+            var personList = App.Database.Table<Person>().OrderBy(x => x.FirstName).ToList();
+            PersonComboBoxItemSource = personList;
+        }
+
+        #endregion
+        #region SetModeSpecificStrings()
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Sets mode specific strings. </summary>
+        ///
+        /// <remarks>   Andre Beging, 09.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public void SetModeSpecificStrings()
+        {
+            if (DialogMode == TransactionType.Deposit)
+            {
+                WindowTitle = "Add Deposit";
+            }
+
+            if (DialogMode == TransactionType.Charge)
+            {
+                WindowTitle = "Add Charge";
+            }
+
+            PersonComboBoxSelectedItem =
+                PersonComboBoxItemSource.FirstOrDefault(x => x.Id == PreselectedPerson?.Id);
+        }
+
+        #endregion
+        #region ClearView()
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Clears the view. </summary>
+        ///
+        /// <remarks>   Andre Beging, 09.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public void ClearView()
+        {
+            AmountTextBoxText = string.Empty;
+            DescriptionTextBoxText = string.Empty;
+            PersonComboBoxSelectedItem = null;
+            DatePickerSelectedDate = DateTime.Now;
+        }
+
+        #endregion
+    }
+}

ViewModel/Dialogs/DatabaseSelectorDialogViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using DebtMgr.Model;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.Command;
+using Microsoft.Win32;
+using SQLite.Net;
+using SQLite.Net.Platform.Generic;
+
+namespace DebtMgr.ViewModel.Dialogs
+{
+    public class DatabaseSelectorDialogViewModel : ViewModelBase
+    {
+        public event EventHandler RequestClose;
+
+        #region SelectDatabasePathText (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="SelectDatabasePathText" />
+        /// </summary>
+        private string _selectDatabasePathText;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string SelectDatabasePathText
+        {
+            get { return _selectDatabasePathText; }
+
+            set
+            {
+                _selectDatabasePathText = value;
+                RaisePropertyChanged(() => SelectDatabasePathText);
+            }
+        }
+
+        #endregion
+
+        #region SelectDatabaseButtonClick Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="SelectDatabaseButtonClick" />
+        /// </summary>
+        private RelayCommand _selectDatabaseButtonClick = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand SelectDatabaseButtonClick => _selectDatabaseButtonClick ?? (_selectDatabaseButtonClick = new RelayCommand(SelectDatabaseButtonClick_Execute));
+
+        private void SelectDatabaseButtonClick_Execute()
+        {
+            var openFileDialog = new OpenFileDialog();
+            openFileDialog.CheckFileExists = true;
+            openFileDialog.Filter = "Debt Manager Database|*.dmdb|All files|*.*";
+
+            //Application.Current.Shutdown();
+
+            if (openFileDialog.ShowDialog() == true)
+            {
+                var x = new SQLiteConnection(new SQLitePlatformGeneric(), openFileDialog.FileName);
+
+                try
+                {
+                    x.Table<Person>().ToList();
+
+                    Properties.Settings.Default["Database"] = openFileDialog.FileName;
+                    Properties.Settings.Default.Save();
+
+                    RequestClose?.Invoke(null, null);
+                }
+                catch (Exception)
+                {
+                    MessageBox.Show(
+                        string.Format("File is not a Debt Manager database\n\n{0}", openFileDialog.FileName),
+                        "File invalid",
+                        MessageBoxButton.OK,
+                        MessageBoxImage.Error);
+                }
+                finally
+                {
+                    x.Close();
+                }
+            }
+
+        }
+
+        #endregion
+        #region CreateDatabaseButtonClick Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="CreateDatabaseButtonClick" />
+        /// </summary>
+        private RelayCommand _createDatabaseButtonClick = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand CreateDatabaseButtonClick => _createDatabaseButtonClick ?? (_createDatabaseButtonClick = new RelayCommand(CreateDatabaseButtonClick_Execute));
+
+        private void CreateDatabaseButtonClick_Execute()
+        {
+            var saveFileDialog = new SaveFileDialog();
+            saveFileDialog.Filter = "Debt Manager Database|*.dmdb|Standard database|*.db";
+            saveFileDialog.CreatePrompt = true;
+
+            if (saveFileDialog.ShowDialog() == true)
+            {
+                Properties.Settings.Default["Database"] = saveFileDialog.FileName;
+                Properties.Settings.Default.Save();
+
+                RequestClose?.Invoke(null, null);
+            }
+        }
+
+        #endregion
+
+        
+    }
+}

ViewModel/Dialogs/NewPersonDialogViewModel.cs

@@ -0,0 +1,125 @@
+using System;
+using System.Windows;
+using DebtMgr.Model;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.Command;
+
+namespace DebtMgr.ViewModel.Dialogs
+{
+    public class NewPersonDialogViewModel : ViewModelBase
+    {
+        public event EventHandler RequestClose;
+
+        #region FirstNameTextBoxText (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="FirstNameTextBoxText" />
+        /// </summary>
+        private string _firstNameTextBoxText;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string FirstNameTextBoxText
+        {
+            get { return _firstNameTextBoxText; }
+
+            set
+            {
+                _firstNameTextBoxText = value;
+                RaisePropertyChanged(() => FirstNameTextBoxText);
+                CreatePersonButtonClickCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        #endregion
+        #region LastNameTextBoxText (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="LastNameTextBoxText" />
+        /// </summary>
+        private string _lastNameTextBoxText;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string LastNameTextBoxText
+        {
+            get { return _lastNameTextBoxText; }
+
+            set
+            {
+                _lastNameTextBoxText = value;
+                RaisePropertyChanged(() => LastNameTextBoxText);
+                CreatePersonButtonClickCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        #endregion
+
+        #region CreatePersonButtonClickCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="CreatePersonButtonClickCommand" />
+        /// </summary>
+        private RelayCommand _createPersonButtonClickCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand CreatePersonButtonClickCommand => _createPersonButtonClickCommand ?? (_createPersonButtonClickCommand = new RelayCommand(CreatePersonButtonClickCommand_Execute, CreatePersonButtonClickCommand_CanExecute));
+
+        private bool CreatePersonButtonClickCommand_CanExecute()
+        {
+            if (string.IsNullOrWhiteSpace(FirstNameTextBoxText) || string.IsNullOrWhiteSpace(LastNameTextBoxText))
+            {
+                return false;
+            }
+            return true;
+        }
+
+        private void CreatePersonButtonClickCommand_Execute()
+        {
+            if (CreatePersonButtonClickCommand_CanExecute())
+            {
+                var newPerson = new Person
+                {
+                    FirstName = FirstNameTextBoxText,
+                    LastName = LastNameTextBoxText
+                };
+
+                var resultId = App.Database.Insert(newPerson);
+
+                if (resultId == 1)
+                {
+                    App.Locator.MainView.UpdatePersonsList();
+                    App.Locator.AddTransactionView.UpdatesPersonsComboBox();
+                    RequestClose?.Invoke(null, null);
+                    ClearView();
+                }
+                else
+                {
+                    MessageBox.Show("Something bad happened", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+                }
+            }
+        }
+
+        #endregion
+
+        #region ClearView()
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Clears the view. </summary>
+        ///
+        /// <remarks>   Andre Beging, 08.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        private void ClearView()
+        {
+            FirstNameTextBoxText = string.Empty;
+            LastNameTextBoxText = string.Empty;
+        }
+
+        #endregion
+
+    }
+}

ViewModel/MainViewModel.cs

@@ -0,0 +1,488 @@
+using DebtMgr.Model;
+using DebtMgr.View.Dialogs;
+using GalaSoft.MvvmLight;
+using GalaSoft.MvvmLight.Command;
+using SQLiteNetExtensions.Extensions;
+using System.Collections.Generic;
+using System.Linq;
+using System.Windows;
+using System;
+using System.Configuration;
+using SQLite.Net;
+using SQLite.Net.Platform.Generic;
+
+namespace DebtMgr.ViewModel
+{
+    public class MainViewModel : ViewModelBase
+    {
+        #region PersonListViewItemSource (List<Person>) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="PersonListViewItemSource" />
+        /// </summary>
+        private List<Person> _personListViewItemSource;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public List<Person> PersonListViewItemSource
+        {
+            get { return _personListViewItemSource; }
+
+            set
+            {
+                _personListViewItemSource = value;
+                RaisePropertyChanged(() => PersonListViewItemSource);
+            }
+        }
+
+        #endregion
+        #region PersonListViewSelectedItem (Person) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="PersonListViewSelectedItem" />
+        /// </summary>
+        private Person _personListViewSelectedItem;
+
+        /// <summary>
+        /// PersonListViewSelectedItem
+        ///</summary>
+        public Person PersonListViewSelectedItem
+        {
+            get { return _personListViewSelectedItem; }
+
+            set
+            {
+                _personListViewSelectedItem = value;
+                RaisePropertyChanged(() => PersonListViewSelectedItem);
+                DeletePersonContextMenuCommand.RaiseCanExecuteChanged();
+
+                UpdateDetailView();
+            }
+        }
+
+
+
+        #endregion
+
+        #region DetailViewHeaderLabelContent (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="DetailViewHeaderLabelContent" />
+        /// </summary>
+        private string _detailViewHeaderLabelContent;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string DetailViewHeaderLabelContent
+        {
+            get { return _detailViewHeaderLabelContent; }
+
+            set
+            {
+                _detailViewHeaderLabelContent = value;
+                RaisePropertyChanged(() => DetailViewHeaderLabelContent);
+            }
+        }
+
+        #endregion
+        #region DetailViewBalanceLabel (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="DetailViewBalanceLabel" />
+        /// </summary>
+        private string _detailViewBalanceLabel;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string DetailViewBalanceLabel
+        {
+            get { return _detailViewBalanceLabel; }
+
+            set
+            {
+                _detailViewBalanceLabel = value;
+                RaisePropertyChanged(() => DetailViewBalanceLabel);
+            }
+        }
+
+        #endregion
+
+        #region OverallBalanceLabel (string) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="OverallBalanceLabel" />
+        /// </summary>
+        private string _overallBalanceLabel;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public string OverallBalanceLabel
+        {
+            get { return _overallBalanceLabel; }
+
+            set
+            {
+                _overallBalanceLabel = value;
+                RaisePropertyChanged(() => OverallBalanceLabel);
+            }
+        }
+
+        #endregion
+
+        #region TransactionHistoryListViewItemSource (List<Transaction>) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="TransactionHistoryListViewItemSource" />
+        /// </summary>
+        private List<Transaction> _transactionHistoryListViewItemSource;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public List<Transaction> TransactionHistoryListViewItemSource
+        {
+            get { return _transactionHistoryListViewItemSource; }
+
+            set
+            {
+                _transactionHistoryListViewItemSource = value;
+                RaisePropertyChanged(() => TransactionHistoryListViewItemSource);
+            }
+        }
+
+        #endregion
+        #region TransactionHistoryListViewSelectedItem (Transaction) Property
+
+        /// <summary>
+        /// Privater Teil von <see cref="TransactionHistoryListViewSelectedItem" />
+        /// </summary>
+        private Transaction _transactionHistoryListViewSelectedItem;
+
+        /// <summary>
+        /// Comment
+        ///</summary>
+        public Transaction TransactionHistoryListViewSelectedItem
+        {
+            get { return _transactionHistoryListViewSelectedItem; }
+
+            set
+            {
+                _transactionHistoryListViewSelectedItem = value;
+                RaisePropertyChanged(() => TransactionHistoryListViewSelectedItem);
+                DeleteTransactionContextMenuCommand.RaiseCanExecuteChanged();
+            }
+        }
+
+        #endregion
+
+        #region MenuNewPersonCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="MenuNewPersonCommand" />
+        /// </summary>
+        private RelayCommand _menuNewPersonCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand MenuNewPersonCommand => _menuNewPersonCommand ?? (_menuNewPersonCommand = new RelayCommand(MenuNewPersonCommand_Execute, MenuNewPersonCommand_CanExecute));
+
+        private bool MenuNewPersonCommand_CanExecute()
+        {
+            return true;
+        }
+
+        private void MenuNewPersonCommand_Execute()
+        {
+            var window = new NewPersonDialogView();
+            window.ShowDialog();
+        }
+
+        #endregion
+        #region SortPersonListViewCommand
+
+        /// <summary>   The sort person list view command. </summary>
+        private RelayCommand<string> _sortPersonListViewCommand = null;
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Gets the sort person list view command. </summary>
+        ///
+        /// <value> The sort person list view command. </value>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public RelayCommand<string> SortPersonListViewCommand
+        {
+            get
+            {
+                if (_sortPersonListViewCommand == null)
+                    _sortPersonListViewCommand = new RelayCommand<string>(SortPersonListViewCommand_Execute);
+
+                return _sortPersonListViewCommand;
+            }
+        }
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Sort person list view command execute. </summary>
+        ///
+        /// <remarks>   Andre Beging, 08.09.2017. </remarks>
+        ///
+        /// <param name="columnName">   Name of the column. </param>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        private void SortPersonListViewCommand_Execute(string columnName)
+        {
+            if (string.IsNullOrWhiteSpace(columnName)) return;
+
+            switch (columnName)
+            {
+                case "FirstName":
+                    PersonListViewItemSource = PersonListViewItemSource.OrderBy(x => x.FirstName).ToList();
+                    break;
+                case "LastName":
+                    PersonListViewItemSource = PersonListViewItemSource.OrderBy(x => x.LastName).ToList();
+                    break;
+                case "Total":
+                    PersonListViewItemSource = PersonListViewItemSource.OrderBy(x => x.Total).ToList();
+                    break;
+            }
+        }
+
+        #endregion
+
+        #region AddChargeContextMenuCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="AddChargeContextMenuCommand" />
+        /// </summary>
+        private RelayCommand _addChargeContextMenuCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand AddChargeContextMenuCommand => _addChargeContextMenuCommand ?? (_addChargeContextMenuCommand = new RelayCommand(AddChargeContextMenuCommand_Execute));
+
+        private void AddChargeContextMenuCommand_Execute()
+        {
+            var window = new AddTransactionView(TransactionType.Charge, PersonListViewSelectedItem);
+            window.ShowDialog();
+        }
+
+        #endregion
+        #region AddDepositContextMenuCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="AddDepositContextMenuCommand" />
+        /// </summary>
+        private RelayCommand _addDepositContextMenuCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand AddDepositContextMenuCommand => _addDepositContextMenuCommand ?? (_addDepositContextMenuCommand = new RelayCommand(AddDepositContextMenuCommand_Execute));
+
+        private void AddDepositContextMenuCommand_Execute()
+        {
+            var window = new AddTransactionView(TransactionType.Deposit, PersonListViewSelectedItem);
+            window.ShowDialog();
+        }
+
+        #endregion
+        #region NewPersonContextMenuCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="NewPersonContextMenuCommand" />
+        /// </summary>
+        private RelayCommand _newPersonContextMenuCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand NewPersonContextMenuCommand => _newPersonContextMenuCommand ?? (_newPersonContextMenuCommand = new RelayCommand(NewPersonContextMenuCommand_Execute));
+
+        private void NewPersonContextMenuCommand_Execute()
+        {
+            var window = new NewPersonDialogView();
+            window.ShowDialog();
+        }
+
+        #endregion
+        #region DeletePersonContextMenuCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="DeletePersonContextMenuCommand" />
+        /// </summary>
+        private RelayCommand _deletePersonContextMenuCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand DeletePersonContextMenuCommand => _deletePersonContextMenuCommand ?? (_deletePersonContextMenuCommand = new RelayCommand(DeletePersonContextMenuCommand_Execute, DeletePersonContextMenuCommand_CanExecute));
+
+        private bool DeletePersonContextMenuCommand_CanExecute()
+        {
+            if (PersonListViewSelectedItem != null)
+                return true;
+            return false;
+        }
+
+        private void DeletePersonContextMenuCommand_Execute()
+        {
+            if (PersonListViewSelectedItem == null) return;
+
+            var result = MessageBox.Show(
+                string.Format(
+                    "Are you sure to delete?\n\n{0} {1}",
+                    PersonListViewSelectedItem.FirstName,
+                    PersonListViewSelectedItem.LastName),
+                "Delete Person",
+                MessageBoxButton.YesNo,
+                MessageBoxImage.Question);
+
+            if (result == MessageBoxResult.Yes)
+            {
+                App.Database.Delete<Person>(PersonListViewSelectedItem.Id);
+                UpdatePersonsList();
+            }
+        }
+
+        #endregion
+
+        #region DeleteTransactionContextMenuCommand Command
+
+        /// <summary>
+        /// Private member backing variable for <see cref="DeleteTransactionContextMenuCommand" />
+        /// </summary>
+        private RelayCommand _deleteTransactionContextMenuCommand = null;
+
+        /// <summary>
+        /// Comment
+        /// </summary>
+        public RelayCommand DeleteTransactionContextMenuCommand => _deleteTransactionContextMenuCommand ?? (_deleteTransactionContextMenuCommand = new RelayCommand(DeleteTransactionContextMenuCommand_Execute, DeleteTransactionContextMenuCommand_CanExecute));
+
+        private bool DeleteTransactionContextMenuCommand_CanExecute()
+        {
+            if (TransactionHistoryListViewSelectedItem != null)
+                return true;
+            return false;
+        }
+
+        private void DeleteTransactionContextMenuCommand_Execute()
+        {
+            if (TransactionHistoryListViewSelectedItem == null) return;
+
+            var result = MessageBox.Show(
+                string.Format(
+                    "Are you sure to delete?\n\n{1} <20>\n{0}",
+                    TransactionHistoryListViewSelectedItem.Description,
+                    TransactionHistoryListViewSelectedItem.Amount),
+                "Delete Transaction",
+                MessageBoxButton.YesNo,
+                MessageBoxImage.Question);
+
+            if (result == MessageBoxResult.Yes)
+            {
+                App.Database.Delete<Transaction>(TransactionHistoryListViewSelectedItem.Id);
+                UpdatePersonsList();
+            }
+        }
+
+        #endregion
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Initializes a new instance of the MainViewModel class. </summary>
+        ///
+        /// <remarks>   Andre Beging, 10.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public MainViewModel()
+        {
+            CheckDatabase();    
+
+            UpdatePersonsList();
+            UpdateDetailView();
+        }
+
+        #region UpdatePersonsList()
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Updates the persons list. </summary>
+        ///
+        /// <remarks>   Andre Beging, 08.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        public void UpdatePersonsList()
+        {
+            // Remember selection
+            var rememberSelection = PersonListViewSelectedItem?.Id;
+
+            var personList = App.Database.GetAllWithChildren<Person>();
+            PersonListViewItemSource = personList;
+
+            var overallBalance = personList.Sum(x => x.Total);
+            OverallBalanceLabel = overallBalance.ToString();
+
+            // Restore selection
+            if (rememberSelection != null && PersonListViewItemSource.Any(x => x.Id == rememberSelection))
+                PersonListViewSelectedItem = PersonListViewItemSource.First(x => x.Id == rememberSelection);
+
+            UpdateDetailView();
+        }
+
+        #endregion
+        #region UpdateDetailView()
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Updates the detail view. </summary>
+        ///
+        /// <remarks>   Andre Beging, 10.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        private void UpdateDetailView()
+        {
+            if (PersonListViewSelectedItem == null)
+            {
+                DetailViewHeaderLabelContent = string.Empty;
+                DetailViewBalanceLabel = string.Empty;
+                TransactionHistoryListViewItemSource = null;
+                return;
+            };
+
+            DetailViewHeaderLabelContent = string.Format("{0} {1}", PersonListViewSelectedItem.FirstName,
+                PersonListViewSelectedItem.LastName);
+            DetailViewBalanceLabel = PersonListViewSelectedItem.Total.ToString();
+
+            TransactionHistoryListViewItemSource = PersonListViewSelectedItem.Transactions.OrderByDescending(x => x.Time).ToList();
+        }
+
+        #endregion
+
+        #region CheckDatabase()
+
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        /// <summary>   Check database. </summary>
+        ///
+        /// <remarks>   Andre Beging, 10.09.2017. </remarks>
+        ////////////////////////////////////////////////////////////////////////////////////////////////////
+        private void CheckDatabase()
+        {
+            var databasePath = Properties.Settings.Default.Database;
+            if (string.IsNullOrWhiteSpace(databasePath))
+            {
+                var window = new DatabaseSelectorDialogView();
+                var result = window.ShowDialog();
+            }
+
+            // Check if provided file path is a valid database
+            try
+            {
+                App.Database.Table<Person>();
+            }
+            catch (Exception)
+            {
+                Properties.Settings.Default["Database"] = string.Empty;
+                CheckDatabase();
+            }
+        }
+
+        #endregion
+    }
+}

ViewModel/ViewModelLocator.cs

@@ -0,0 +1,61 @@
+/*
+  In App.xaml:
+  <Application.Resources>
+      <vm:ViewModelLocator xmlns:vm="clr-namespace:DebtMgr"
+                           x:Key="Locator" />
+  </Application.Resources>
+  
+  In the View:
+  DataContext="{Binding Source={StaticResource Locator}, Path=ViewModelName}"
+
+  You can also use Blend to do all this with the tool's support.
+  See http://www.galasoft.ch/mvvm
+*/
+
+using DebtMgr.ViewModel.Dialogs;
+using GalaSoft.MvvmLight.Ioc;
+using Microsoft.Practices.ServiceLocation;
+
+namespace DebtMgr.ViewModel
+{
+    /// <summary>
+    /// This class contains static references to all the view models in the
+    /// application and provides an entry point for the bindings.
+    /// </summary>
+    public class ViewModelLocator
+    {
+        /// <summary>
+        /// Initializes a new instance of the ViewModelLocator class.
+        /// </summary>
+        public ViewModelLocator()
+        {
+            ServiceLocator.SetLocatorProvider(() => SimpleIoc.Default);
+
+            ////if (ViewModelBase.IsInDesignModeStatic)
+            ////{
+            ////    // Create design time view services and models
+            ////    SimpleIoc.Default.Register<IDataService, DesignDataService>();
+            ////}
+            ////else
+            ////{
+            ////    // Create run time view services and models
+            ////    SimpleIoc.Default.Register<IDataService, DataService>();
+            ////}
+
+            SimpleIoc.Default.Register<MainViewModel>();
+            SimpleIoc.Default.Register<NewPersonDialogViewModel>();
+            SimpleIoc.Default.Register<AddTransactionViewModel>();
+            SimpleIoc.Default.Register<DatabaseSelectorDialogViewModel>();
+        }
+
+        public MainViewModel MainView => ServiceLocator.Current.GetInstance<MainViewModel>();
+        public NewPersonDialogViewModel NewPersonDialogView => ServiceLocator.Current.GetInstance<NewPersonDialogViewModel>();
+        public AddTransactionViewModel AddTransactionView => ServiceLocator.Current.GetInstance<AddTransactionViewModel>();
+        public DatabaseSelectorDialogViewModel DatabaseSelectorDialogView => ServiceLocator.Current.GetInstance<DatabaseSelectorDialogViewModel>();
+
+        public static void Cleanup()
+        {
+            // TODO Clear the ViewModels
+        }
+    }
+}