Chapter 14 WCF Client WPF Implementation. Screen Layout

(1)

Chapter 14 – WCF Client – WPF Implementation

Screen Layout

(2)

Window1.xaml

<Window x:Class="Chap14WcfClient.Window1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:vc="clr-

namespace:WpfCommonLib.ValueConverters;assembly=WpfCommonLib"

Title="Window1" Height="376" Width="496" Loaded="Window_Loaded">

<Window.Resources>

<vc:CurrencyConverter x:Key="CurrencyConverter"/>

</Window.Resources>

<StackPanel Name="stackPanel1" Height="27" VerticalAlignment="Top"

Orientation="Horizontal">

<Label Height="28" Name="label1" Width="70">Customers:</Label>

<ComboBox

Name="_comboBoxCustomers"

DisplayMemberPath="Name"

SelectedValuePath="ContactID"

Height="23"

Width="151"

SelectionChanged="_comboBoxCustomers_SelectionChanged" />

<Button Height="23" Name="_buttonSave" Width="75"

HorizontalAlignment="Right" Click="_buttonSave_Click">Save</Button>

</StackPanel>

<StackPanel Margin="0,27,0,0" Name="stackPanel2"

HorizontalAlignment="Left" Width="154" Height="125"

VerticalAlignment="Top">

<Label Height="25" Name="label2" Width="154">Title:</Label>

<Label Height="25" Name="label3" Width="156">FirstName:</Label>

<Label Height="25" Name="label4" Width="156">LastName:</Label>

<Label Height="25" Name="label5" Width="156">Notes:</Label>

<Label Height="25" Name="label6" Width="156">Initial Date:</Label>

</StackPanel>

<StackPanel Margin="154,27,0,0" Name="stackPanel3" Height="125"

VerticalAlignment="Top" HorizontalAlignment="Left" Width="217">

</StackPanel>

<StackPanel Margin="370,0,-1,186" Name="stackPanel4" Height="125"

VerticalAlignment="Bottom">

<Button Height="23" Name="_newCustomer" Width="90"

VerticalAlignment="Center" Click="_newCustomer_Click">New Customer</Button>

</StackPanel>

<StackPanel Margin="0,152,0,0" Name="stackPanel5"

Orientation="Horizontal" VerticalAlignment="Top">

<Label Height="102" Name="label7" Width="79"

HorizontalAlignment="Left">Reservations:</Label>

<ListBox.ItemTemplate>

(3)

<Border BorderThickness="2" CornerRadius="4"

BorderBrush="Red">

<Grid>

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

<TextBlock Grid.ColumnSpan="2"

FontWeight="Bold"

Foreground="Blue"

Text="{Binding Path=ReservationDate, StringFormat=dd/MM/yyyy}"/>

<TextBlock Grid.Row="1"

FontWeight="Bold"

Text="StartDate :"/>

<TextBlock Grid.Row="1" Grid.Column="1"

Text="{Binding Path=Trip.StartDate, StringFormat=dd/MM/yyyy}"/>

FontWeight="Bold"

Text="EndDate :"/>

Text="{Binding Path=Trip.EndDate, StringFormat=dd/MM/yyyy}"/>

FontWeight="Bold"

Text="Destination :"/>

Text="{Binding Path=Trip.Destination.DestinationName}"/>

</Grid>

</Border>

</DataTemplate>

</ListBox.ItemTemplate>

</ListBox>

<ComboBox Height="23" Name="_comboBoxTrips" Width="185"

VerticalAlignment="Top" StaysOpenOnEdit="True">

<ComboBox.ItemTemplate>

<Border BorderThickness="2" CornerRadius="4"

BorderBrush="Blue" Width="200">

<Grid>

<Grid.ColumnDefinitions>

</Grid.ColumnDefinitions>

<Grid.RowDefinitions>

</Grid.RowDefinitions>

(4)

<TextBlock FontWeight="Bold"

Text="Destination: "/>

<TextBlock Grid.Row="1" Text="StartDate:

"/>

Text="{Binding Path=StartDate, StringFormat=dd/MM/yyyy }"/>

Text="{Binding Path=EndDate, StringFormat=dd/MM/yyyy }"/>

<TextBlock Grid.Row="3" Text="Trip Cost:

"/>

Text="{Binding Path=TripCostUSD, Converter={StaticResource CurrencyConverter}}"/>

</Grid>

</Border>

</DataTemplate>

</ComboBox.ItemTemplate>

</ComboBox>

</StackPanel>

<Button Height="23" HorizontalAlignment="Left" Margin="4,0,0,39"

Name="_buttonAddReservation" VerticalAlignment="Bottom" Width="113"

Click="_buttonAddReservation_Click">Add Reservation</Button>

<Button Height="23" Margin="117,0,179,39"

Name="_buttonDeleteReservation" VerticalAlignment="Bottom"

Click="_buttonDeleteReservation_Click">Delete Selected Reservation</Button>

</Grid>

</Window>

Window1.xaml.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

using Chap14WcfClient.BAWCFService;

using WpfCommonLib.ValueConverters;

namespace Chap14WcfClient {

/// <summary>

/// Project : Programming Entity Framework (Julia Lerman) /// Author : Emmanuel Nuyttens

/// Purpose : Errata on Chapter 14 - WPF Implementation.

/// </summary>

public partial class Window1 : Window

(5)

{

List<int> _resDeleteList;

Customer _currentCustomer;

public Window1() {

InitializeComponent();

}

private void Window_Loaded(object sender, RoutedEventArgs e) {

FillCombo();

}

private void FillCombo() {

var custtrips = GetCustsAndTrips();

this._comboBoxCustomers.ItemsSource = custtrips.Custs;

this._comboBoxTrips.ItemsSource = custtrips.Trips;

}

private void _comboBoxCustomers_SelectionChanged(object sender, SelectionChangedEventArgs e)

{

if (_comboBoxCustomers.SelectedIndex > -1 &&

_comboBoxCustomers.SelectedValue != null) {

_currentCustomer =

GetCustomer((Int32)_comboBoxCustomers.SelectedValue);

if (_currentCustomer != null) {

this.DataContext = _currentCustomer;

_resDeleteList = new List<int>();

this.ShowReservations();

} } }

private void ShowReservations() {

_listBoxReservations.ItemsSource = null;

if (_currentCustomer.Reservations.Count > 0) {

_listBoxReservations.ItemsSource = _currentCustomer.Reservations;

} }

private void _newCustomer_Click(object sender, RoutedEventArgs e) {

_currentCustomer = new Customer();

_currentCustomer.TimeStamp =

System.Text.Encoding.Default.GetBytes("0x123");

(6)

_currentCustomer.timestamp1 =

_currentCustomer.Reservations = new List<Reservation>();

this.DataContext = _currentCustomer;

_resDeleteList = new List<int>();

ShowReservations();

}

private void _buttonAddReservation_Click(object sender, RoutedEventArgs e)

{

var selTrip = (Trip)_comboBoxTrips.SelectedItem;

if (selTrip != null) {

Reservation newRes = new Reservation();

// get the trip + location newRes.Trip = selTrip;

newRes.TripDetails = selTrip.TripDetails;

newRes.ReservationDate = System.DateTime.Now;

newRes.TimeStamp =

_currentCustomer.Reservations.Add(newRes);

// Refresh the ListBox of the Reservations ShowReservations();

} }

private void _buttonDeleteReservation_Click(object sender, RoutedEventArgs e)

{

if (_listBoxReservations.SelectedIndex >= 0) {

// Add reservationID to the deletedlist

Int32 id = (_listBoxReservations.SelectedItem as Reservation).ReservationID;

_resDeleteList.Add(id);

// Find the reservation in the customer's reservations Reservation delRes = _currentCustomer.Reservations.Where(r

=> r.ReservationID == id).FirstOrDefault();

if (delRes != null) {

_currentCustomer.Reservations.Remove(delRes);

ShowReservations();

} } }

private void _buttonSave_Click(object sender, RoutedEventArgs e) {

var status = UpdateCustomer();

// in case of insert customer, new id of customer is returned if (string.IsNullOrEmpty(status) == false)

{

// did the update return an id ?

(7)

int newId = 0;

if (int.TryParse(status, out newId)) {

_currentCustomer.ContactID = newId;

FillCombo();

_comboBoxCustomers.SelectedValue = newId;

} } }

#region WCF Service Related Data Loader and Data Persistance Methods

private CustsandTrips GetCustsAndTrips() {

using (CustomerServiceClient proxy = new CustomerServiceClient())

{

return proxy.GetCustsandTrips();

} }

private Customer GetCustomer(int p_customerID) {

{

return proxy.GetCustomer(p_customerID);

} }

private string UpdateCustomer() {

string status = null;

{

if (_currentCustomer.ContactID == 0) {

status = proxy.InsertCustomer(_currentCustomer);

} else {

CusttoEdit custEdit = new CusttoEdit();

custEdit.Customer = _currentCustomer;

custEdit.ReservationsToDelete = _resDeleteList;

status = proxy.UpdateCustomer(custEdit);

} }

return status;

}

#endregion

} }

(8)

CurrencyConverter

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Data;

using System.Globalization;

namespace WpfCommonLib.ValueConverters {

[ValueConversion(typeof(decimal),typeof(string))]

public class CurrencyConverter : IValueConverter {

#region IValueConverter Members

public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

if (value != null && value.ToString() != string.Empty) {

decimal money = Decimal.Parse(value.ToString());

return money.ToString("C",culture);

}

return null;

}

public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

{

string money = value.ToString();

decimal result;

if (Decimal.TryParse(money, NumberStyles.Any, null, out result))

{

return result;

}

return value;

}

#endregion }

}