implementet ErrorMessages

Apollon.EntityFramework/Commands/CreateTournamentCommand.cs

@@ -21,8 +21,10 @@ namespace Apollon.EntityFramework.Commands
 
         public  async Task Execute(Tournament tournament)
         {
+            throw new Exception();
+
             using (TournamentsDbContext context = _contextFactory.Create())
-            {                
+            {        
                 TournamentDto tournamentDto = new TournamentDto()
                 {
                     Id = tournament.Id,

Apollon.EntityFramework/Commands/DeleteTournamentCommand.cs

@@ -19,7 +19,7 @@ namespace Apollon.EntityFramework.Commands
         }
 
         public async Task Execute(Guid id)
-        {
+        {            
             using (TournamentsDbContext context = _contextFactory.Create())
             {
                 TournamentDto tournamentDto = new TournamentDto()

Apollon.EntityFramework/Commands/UpdateTournamentCommand.cs

@@ -19,7 +19,7 @@ namespace Apollon.EntityFramework.Commands
         }
 
         public async Task Execute(Tournament tournament)
-        {
+        {            
             using (TournamentsDbContext context = _contextFactory.Create())
             {                
                 TournamentDto tournamentDto = new TournamentDto()

Apollon.EntityFramework/Queries/GetAllTournamentsQuery.cs

@@ -20,7 +20,7 @@ namespace Apollon.EntityFramework.Queries
         }
 
         public async Task<IEnumerable<Tournament>> Execute()
-        {
+        {       
             using (TournamentsDbContext context = _contextFactory.Create())
             {
                 IEnumerable<TournamentDto> tournamentsDtos = await context.Tournaments.ToListAsync();

Apollon.WPF/Commands/AddTournamentCommand.cs

@@ -28,6 +28,7 @@ namespace Apollon.WPF.Commands
         {
             AddEditDetailsViewModel detailsViewModel = _addTournamentViewModel.AddEditDetailsViewModel;
 
+            detailsViewModel.ErrorMessage = null;
             detailsViewModel.IsSubmitting = true;
 
             Tournament tournament = new Tournament(
@@ -51,7 +52,7 @@ namespace Apollon.WPF.Commands
             }
             catch (Exception)
             {
-                throw;
+                detailsViewModel.ErrorMessage = "Daten konnten nicht gespeichert werden!";
             }
             finally
             {

Apollon.WPF/Commands/DeleteTournamentCommand.cs

@@ -31,6 +31,7 @@ namespace Apollon.WPF.Commands
 
         public override async Task ExecuteAsync(object parameter)
         {
+            _warningDeleteViewModel.ErrorMessage = null;
             _warningDeleteViewModel.IsDeleting = true;
             
             Tournament tournament = _overviewListingItemViewModel.Tournament;
@@ -43,7 +44,7 @@ namespace Apollon.WPF.Commands
             }
             catch (Exception)
             {
-                throw;
+                _warningDeleteViewModel.ErrorMessage = "Speichern fehlgeschlagen!";
             }
             finally
             {

Apollon.WPF/Commands/EditTournamentCommand.cs

@@ -26,6 +26,7 @@ namespace Apollon.WPF.Commands
         {
             AddEditDetailsViewModel detailsViewModel = _editTournamentViewModel.AddEditDetailsViewModel;
 
+            detailsViewModel.ErrorMessage = null;
             detailsViewModel.IsSubmitting = true;
 
             Tournament tournament = new Tournament(
@@ -48,7 +49,7 @@ namespace Apollon.WPF.Commands
             catch (Exception)
             {
 
-                throw;
+                detailsViewModel.ErrorMessage = "Daten konnten nicht gespeichert werden!";
             }
             finally
             {

Apollon.WPF/Commands/LoadTournamentsCommand.cs

@@ -21,6 +21,7 @@ namespace Apollon.WPF.Commands
 
         public override async Task ExecuteAsync(object parameter)
         {
+            _overviewViewModel.ErrorMessage = null;
             _overviewViewModel.IsLoading = true;
 
             try
@@ -29,7 +30,7 @@ namespace Apollon.WPF.Commands
             }
             catch (Exception)
             {
-                throw;
+                _overviewViewModel.ErrorMessage = "Daten konnten nicht geladen werden! Bitte starten Sie die Anwendung neu!";
             }
             finally
             {

Apollon.WPF/ViewModels/AddEditDetailsViewModel.cs

@@ -139,7 +139,24 @@ namespace Apollon.WPF.ViewModels
 			}
 		}
 
-		public bool CanSubmit => !string.IsNullOrEmpty(TournamentName);
+        private string _errorMessage;
+        public string ErrorMessage
+        {
+            get
+            {
+                return _errorMessage;
+            }
+            set
+            {
+                _errorMessage = value;
+                OnPropertyChanged(nameof(ErrorMessage));
+                OnPropertyChanged(nameof(HasErrorMessage));
+            }
+        }
+
+        public bool HasErrorMessage => !string.IsNullOrEmpty(ErrorMessage);
+
+        public bool CanSubmit => !string.IsNullOrEmpty(TournamentName);
 
         public ICommand SubmitCommand { get; }
         public ICommand CancelCommand { get; }

Apollon.WPF/ViewModels/OverviewViewModel.cs

@@ -29,6 +29,23 @@ namespace Apollon.WPF.ViewModels
             }
         }
 
+        private string _errorMessage;
+        public string ErrorMessage
+        {
+            get
+            {
+                return _errorMessage;
+            }
+            set
+            {
+                _errorMessage = value;
+                OnPropertyChanged(nameof(ErrorMessage));
+                OnPropertyChanged(nameof(HasErrorMessage));
+            }
+        }
+
+        public bool HasErrorMessage => !string.IsNullOrEmpty(ErrorMessage);
+
         public ICommand AddTournamentCommand { get; }
         public ICommand LoadTournamentsCommand { get; }
         public ICommand NavigateNavBarCommand { get; }

Apollon.WPF/ViewModels/WarningDeleteViewModel.cs

@@ -24,7 +24,25 @@ namespace Apollon.WPF.ViewModels
 				OnPropertyChanged(nameof(IsDeleting));
 			}
 		}
-		public ICommand WarningCloseCommand { get;}
+
+        private string _errorMessage;
+        public string ErrorMessage
+        {
+            get
+            {
+                return _errorMessage;
+            }
+            set
+            {
+                _errorMessage = value;
+                OnPropertyChanged(nameof(ErrorMessage));
+                OnPropertyChanged(nameof(HasErrorMessage));
+            }
+        }
+
+        public bool HasErrorMessage => !string.IsNullOrEmpty(ErrorMessage);
+
+        public ICommand WarningCloseCommand { get;}
         public ICommand DeleteCommand { get; }
         public WarningDeleteViewModel(ModalNavigationStore modalNavigationStore,TournamentsStore tournamentsStore, OverviewListingItemViewModel overviewListingItemViewModel)
         {

Apollon.WPF/Views/Components/AddEditDetails.xaml

@@ -6,6 +6,9 @@
              xmlns:local="clr-namespace:Apollon.WPF.Views.Components" 
              xmlns:custom="clr-namespace:LoadingSpinnerControl;assembly=LoadingSpinnerControl"
              mc:Ignorable="d">
+    <UserControl.Resources>
+        <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
+    </UserControl.Resources>
     <Grid>
         <Grid.RowDefinitions>
             <RowDefinition Height="55"/>
@@ -127,6 +130,14 @@
                  HorizontalAlignment="Left"
                  Background="LightGray"/>
 
+        <TextBlock Text="{Binding ErrorMessage}"
+                   Grid.Row="7"
+                   Grid.ColumnSpan="2"
+                   TextAlignment="Center"
+                   FontSize="14"
+                   Foreground="Red"
+                   Visibility="{Binding HasErrorMessage, Converter= {StaticResource BooleanToVisibilityConverter}}"/>                    
+
         <Grid Grid.Row="7"
               Grid.ColumnSpan="2"
               Margin="0 30 0 0"

Apollon.WPF/Views/OverviewView.xaml

@@ -100,10 +100,31 @@
                        VerticalAlignment="Center"
                            Foreground="{StaticResource BrushPrimary1}"
                            Margin="0 0 0 30"
-                           FontSize="14">                   
+                           FontSize="14">
                 </TextBlock>
                 <custom:LoadingSpinner Diameter="50" IsLoading="True" Thickness="3" Color="{StaticResource BrushPrimary1}"/>
-            </StackPanel>                  
+            </StackPanel>
+            <Grid Width="250">
+                <Grid.Style>
+                    <Style TargetType="Grid">
+                        <Setter Property="Visibility" Value="Collapsed"/>
+                        <Style.Triggers>
+                            <DataTrigger Binding="{Binding HasErrorMessage}" Value="true">
+                                <Setter Property="Visibility" Value="Visible"/>
+                            </DataTrigger>
+                        </Style.Triggers>
+                    </Style>
+                </Grid.Style>
+                <TextBlock Text="{Binding ErrorMessage}"
+                       FontSize="14"
+                       Foreground="Red"
+                       TextWrapping="WrapWithOverflow"
+                       HorizontalAlignment="Center"
+                       VerticalAlignment="Center"
+                           TextAlignment="Center">
+
+                </TextBlock>
+            </Grid>            
         </Grid>
 
         <Grid Grid.Column="2"
@@ -116,8 +137,12 @@
                         <DataTrigger Binding="{Binding IsLoading}" Value="false">
                             <Setter Property="Visibility" Value="Visible"/>
                         </DataTrigger>
+                        <DataTrigger Binding="{Binding HasErrorMessage}" Value="true">
+                            <Setter Property="Visibility" Value="Hidden"/>
+                        </DataTrigger>
                     </Style.Triggers>
                 </Style>
+
             </Grid.Style>
             <StackPanel>
                 <TextBlock Margin="20"

Apollon.WPF/Views/WarningDeleteView.xaml

@@ -7,6 +7,9 @@
              xmlns:custom="clr-namespace:LoadingSpinnerControl;assembly=LoadingSpinnerControl"
              mc:Ignorable="d" 
              d:DesignHeight="450" d:DesignWidth="800">
+    <UserControl.Resources>
+        <BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter"/>
+    </UserControl.Resources>
     <Grid>
         <StackPanel Grid.ColumnSpan="2"
                     MaxWidth="300">
@@ -51,6 +54,15 @@
                                    Color="{StaticResource BrushPrimary1}" 
                                    IsLoading="{Binding IsDeleting}"/>
             </Grid>
+            <TextBlock 
+                   Text="{Binding ErrorMessage}"
+                   Margin="5"
+                   Grid.Row="7"
+                   Grid.ColumnSpan="2"
+                   TextAlignment="Center"
+                   FontSize="14"
+                   Foreground="Red"
+                   Visibility="{Binding HasErrorMessage, Converter= {StaticResource BooleanToVisibilityConverter}}"/>
         </StackPanel>
     </Grid>
 </UserControl>