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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace MongoDBApp.Utility
{
public class AwaitableMessages
{
public static Task<T> NextMessageAsync<T>()
{
var tcs = new TaskCompletionSource<T>();
Messenger.Default.Register<T>(null, item => tcs.TrySetResult(item));
return tcs.Task;
}
}
}
using MongoDBApp.Models;
using MongoDBApp.Services;
using MongoDBApp.Utility;
using PropertyChanged;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using MongoDBApp.Extensions;
using System.Windows.Input;
using MongoDBApp.Common;
using MongoDBApp.Messages;
namespace MongoDBApp.ViewModels
{
[ImplementPropertyChanged]
public class CustomerOrdersViewModel : IPageViewModel
{
private IDataService<OrderModel> _orderDataService;
public ICommand SaveCommand { get; set; }
public ICommand EditCommand { get; set; }
public ICommand WindowLoadedCommand { get; set; }
private IDialogService _dialogService;
public CustomerOrdersViewModel(IDataService<OrderModel> orderDataService, IDialogService dialogservice)
{
this._orderDataService = orderDataService;
this._dialogService = dialogservice;
Messenger.Default.Register<ProductModel>(this, OnUpdateProductMessageReceived);
LoadCommands();
}
#region properties
public string SelectedCustomerEmail { get; set; }
public ObservableCollection<OrderModel> CustomerOrders { get; set; }
public OrderModel SelectedOrder { get; set; }
public ProductModel SelectedProduct { get; set; }
public Task Initialization { get; set; }
public bool IsEnabled { get; set; }
public string Name
{
get
{
return "Order Details";
}
}
#endregion
#region methods
private void OnUpdateProductMessageReceived(ProductModel product)
{
SelectedProduct = product;
_dialogService.CloseDetailDialog();
}
private void LoadCommands()
{
SaveCommand = new CustomCommand((c) => SaveCustomerAsync(c).FireAndLogErrors(), CanSaveOrder);
EditCommand = new CustomCommand(EditOrder, CanModifyOrder);
WindowLoadedCommand = new CustomCommand((c) => WindowLoadedAsync(c).FireAndLogErrors(), CanLoadWindow);
}
private bool CanSaveOrder(object obj)
{
if (SelectedOrder != null && SelectedOrder.Email != null && SelectedOrder.Date != null &&
SelectedOrder.Id != null)
{
return true;
}
return false;
}
private bool CanModifyOrder(object obj)
{
if (SelectedOrder != null && SelectedOrder.Email != null && SelectedOrder.Date != null &&
SelectedOrder.Id != null && SelectedProduct != null )
{
return true;
}
return false;
}
private void EditOrder(object obj)
{
Messenger.Default.Send<ProductModel>(SelectedProduct);
_dialogService.ShowDetailDialog();
}
private bool CanLoadWindow(object obj)
{
return true;
}
private async Task WindowLoadedAsync(object obj)
{
await InitializeAsync();
this.Initialization = InitializeAsync();
}
private async Task InitializeAsync()
{
var customer = await AwaitableMessages.NextMessageAsync<CustomerModel>();
SelectedCustomerEmail = customer.Email;
await LoadCustomerOrdersAsync(SelectedCustomerEmail);
IsEnabled = true;
}
public async Task LoadCustomerOrdersAsync(string email)
{
var ordersResult = await _orderDataService.GetAllByEmailAsync(email);
CustomerOrders = ordersResult.ToObservableCollection();
}
private async Task SaveCustomerAsync(object customer)
{
if (SelectedOrder != null)
{
IsEnabled = true;
await Task.Run(() => _orderDataService.UpdateAsync(SelectedOrder));
IsEnabled = false;
}
return;
}
#endregion
}
}
<UserControl x:Class="MongoDBApp.Views.CustomerOrdersView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:boolean_converter="clr-namespace:MongoDBApp.Converters"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:i="clr-namespace:System.Windows.Interactivity;assembly=System.Windows.Interactivity"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
d:DesignHeight="300"
d:DesignWidth="300"
mc:Ignorable="d">
<UserControl.Resources>
<boolean_converter:BooleanConverter x:Key="BooleanConverter" />
</UserControl.Resources>
<Viewbox>
<xctk:BusyIndicator IsBusy="{Binding ButtonEnabled}">
<Grid>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
<RowDefinition Height="2*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
<RowDefinition Height="1*" />
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="2*" />
<ColumnDefinition Width="1*" />
<ColumnDefinition Width="2*" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<i:Interaction.Triggers>
<i:EventTrigger EventName="Loaded">
<i:InvokeCommandAction Command="{Binding WindowLoadedCommand}" />
</i:EventTrigger>
</i:Interaction.Triggers>
<DataGrid x:Name="customersgrid"
Grid.Row="0"
Grid.RowSpan="3"
Grid.Column="1"
Grid.ColumnSpan="4"
AutoGenerateColumns="False"
ItemsSource="{Binding CustomerOrders}"
SelectedItem="{Binding SelectedOrder}">
<DataGrid.Columns>
<DataGridTextColumn Binding="{Binding Email}" Header="Email" />
<DataGridTextColumn Binding="{Binding Date}" Header="Date" />
<DataGridTextColumn Binding="{Binding Status}" Header="Shipping Status" />
</DataGrid.Columns>
</DataGrid>
<Label Grid.Row="4"
Grid.Column="1"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Content="Date:" />
<TextBlock Grid.Row="4"
Grid.Column="2"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Text="{Binding SelectedOrder.Date}"
TextWrapping="Wrap" />
<Label Grid.Row="4"
Grid.Column="3"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Content="Products:" />
<ComboBox Grid.Row="4"
Grid.Column="4"
Grid.ColumnSpan="4"
Width="120"
HorizontalAlignment="Left"
VerticalAlignment="Top"
DisplayMemberPath="ProductId"
ItemsSource="{Binding SelectedOrder.Products}"
ScrollViewer.VerticalScrollBarVisibility="Visible"
SelectedItem="{Binding SelectedProduct}" />
<Label Grid.Row="5"
Grid.Column="1"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Content="Email:" />
<TextBlock Grid.Row="5"
Grid.Column="2"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Text="{Binding SelectedOrder.Email}"
TextWrapping="Wrap" />
<RadioButton Grid.Row="5"
Grid.Column="3"
Grid.ColumnSpan="2"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Content="Shipped"
IsChecked="{Binding SelectedOrder.Status,
Converter={StaticResource BooleanConverter},
ConverterParameter='true',
Mode=TwoWay}" />
<RadioButton Grid.Row="5"
Grid.Column="4"
Grid.ColumnSpan="2"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Content="Processing"
IsChecked="{Binding SelectedOrder.Status,
Converter={StaticResource BooleanConverter},
ConverterParameter='false',
Mode=TwoWay}" />
<Button Grid.Row="7"
Grid.Column="3"
Grid.ColumnSpan="3"
Width="75"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Command="{Binding EditCommand}"
Content="Edit"
IsEnabled="{Binding IsEnabled}" />
<Button Grid.Row="7"
Grid.Column="3"
Grid.ColumnSpan="3"
Width="75"
HorizontalAlignment="Center"
VerticalAlignment="Top"
Command="{Binding SaveCommand}"
Content="Save"
IsEnabled="{Binding IsEnabled}" />
</Grid>
</Grid>
</xctk:BusyIndicator>
</Viewbox>
</UserControl>
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