Error fixing with input validation

PrototypWPFHAG/App.xaml

@@ -2,7 +2,7 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:local="clr-namespace:PrototypWPFHAG"
-             StartupUri="MainWindow.xaml">
+             StartupUri="SearchWindow.xaml">
     <Application.Resources>
 		<ResourceDictionary>
 			<ResourceDictionary.MergedDictionaries>

PrototypWPFHAG/MainWindow.xaml

@@ -28,10 +28,6 @@
                     <PasswordBox Width="170" Height="30" Margin="0,5,34,0" x:Name="PasswordTextBox"
                     PasswordChanged="PasswordTextBox_PasswordChanged"/>
 
-<<<<<<< HEAD
-                <!-- 登录按钮 -->
-                <Button Height="30" Width="100" Content="Log in" Margin="0,20,0,0" Click="LoginButton_Click" />
-=======
                     <!-- Textbox for visible password (hidden at default) -->
                     <TextBox Width="170" Height="30" Margin="0,5,34,0" x:Name="PasswordVisibleTextBox"
                     Visibility="Collapsed" IsReadOnly="True"/>
@@ -45,7 +41,6 @@
                 <!-- Login Button -->
                 <Button Height="30" Width="100" Content="Zur Suche" Margin="0,20,0,0" 
                         Click="loginButton_Click" IsDefault="True" />
->>>>>>> 1195250b98172d34b8c49b85a81c21d1f26cdbac
             </StackPanel>
         </Border>
     </Grid>

PrototypWPFHAG/MainWindow.xaml.cs

@@ -1,6 +1,4 @@
 using System.Data;
-using System.Runtime.InteropServices;
-using System.Security.Principal;
 using System.Text;
 using System.Windows;
 using System.Windows.Controls;
@@ -25,14 +23,6 @@ public partial class MainWindow : MetroWindow
     public MainWindow()
     {
         InitializeComponent();
-<<<<<<< HEAD
-        //TestConnection();
-        //Console.ReadKey();
-
-    }
-
-    private static void TestConnection()
-=======
     }
 
     private void Window_Loaded(object sender, RoutedEventArgs e)
@@ -46,14 +36,13 @@ public partial class MainWindow : MetroWindow
     }
 
     private string ValidateUser(string username, string password)
->>>>>>> 1195250b98172d34b8c49b85a81c21d1f26cdbac
     {
         using (NpgsqlConnection con = GetConnection())
         {
             con.Open();
 
             // Check for correct UserName
-            string userQuery = "SELECT COUNT(*) FROM \"User\" WHERE \"UserName\" = @username";
+            string userQuery = "SELECT COUNT(*) FROM \"users\" WHERE \"username\" = @username";
             using (NpgsqlCommand userCmd = new NpgsqlCommand(userQuery, con))
             {
                 userCmd.Parameters.AddWithValue("@username", username);
@@ -66,7 +55,7 @@ public partial class MainWindow : MetroWindow
             }
             
             // Check for correct Password
-            string pwQuery = "SELECT COUNT(*) FROM \"User\" WHERE \"UserName\" = @username AND \"Password\" = @password";
+            string pwQuery = "SELECT COUNT(*) FROM \"users\" WHERE \"username\" = @username AND \"password\" = @password";
             using (NpgsqlCommand pwCmd = new NpgsqlCommand(pwQuery, con))
             {
                 pwCmd.Parameters.AddWithValue("@username", username);
@@ -79,15 +68,8 @@ public partial class MainWindow : MetroWindow
                 }
             }
         }
-<<<<<<< HEAD
-    }
-    private static NpgsqlConnection GetConnection()
-    {
-        return new NpgsqlConnection(@"Server=localhost;Port=7854;User Id=postgres;Database=postgres;");
-=======
 
         return "Erfolgreich";
->>>>>>> 1195250b98172d34b8c49b85a81c21d1f26cdbac
     }
 
     private void ShowPasswordButton_PreviewMouseDown(object sender, RoutedEventArgs e)

PrototypWPFHAG/PdfServiceClient.cs

@@ -0,0 +1,52 @@
+using System.Net.Http;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Threading.Tasks;
+
+public class DocumentResponse
+{
+    [JsonPropertyName("documents")]  // Konsistent mit Such-Endpoint
+    public List<SearchResult> Documents { get; set; }
+}
+
+public class PdfServiceClient
+{
+    private readonly HttpClient _httpClient;
+    private const string BaseUrl = "http://localhost:8000"; // Microservice-URL
+
+    public PdfServiceClient()
+    {
+        _httpClient = new HttpClient
+        {
+            BaseAddress = new Uri(BaseUrl), Timeout = TimeSpan.FromSeconds(30)
+        };
+    }
+
+    public async Task<string> GetDocumentContentAsync(int documentId)
+    {
+        var response = await _httpClient.GetAsync($"{BaseUrl}/documents/{documentId}/markdown");
+        response.EnsureSuccessStatusCode();
+        var json = await response.Content.ReadAsStringAsync();
+        var result = JsonSerializer.Deserialize<JsonElement>(json);
+        return result.GetProperty("content").GetString();
+    }
+
+    public async Task<List<SearchResult>> SearchDocumentsAsync(string query)
+    {
+        var response = await _httpClient.GetAsync($"{BaseUrl}/documents/search?query={query}");
+        response.EnsureSuccessStatusCode();
+        var json = await response.Content.ReadAsStringAsync();
+        return JsonSerializer.Deserialize<List<SearchResult>>(json);
+    }
+}
+
+public class SearchResult
+{
+    [JsonPropertyName("id")]
+    public int Id { get; set; }
+
+    [JsonPropertyName("filename")]
+    public string Filename { get; set; }
+    [JsonPropertyName("content")]
+    public string Content { get; set; }
+}

PrototypWPFHAG/PrototypWPFHAG.csproj

@@ -14,6 +14,7 @@
 
   <ItemGroup>
     <None Remove="Images\databaseicon.png" />
+    <None Remove="Images\pdf-icon.png" />
   </ItemGroup>
 
   <ItemGroup>
@@ -33,4 +34,8 @@
     <PackageReference Include="SixLabors.ImageSharp" Version="3.1.7" />
   </ItemGroup>
 
+  <ItemGroup>
+    <Resource Include="Images\pdf-icon.png" />
+  </ItemGroup>
+
 </Project>

PrototypWPFHAG/SearchWindow.xaml

@@ -1,69 +1,153 @@
-<Window x:Class="PrototypWPFHAG.SearchWindow"
+<mah:MetroWindow xmlns:mah="http://metro.mahapps.com/winfx/xaml/controls"
-        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                 x:Class="PrototypWPFHAG.SearchWindow"
-        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
+                 xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-        xmlns:local="clr-namespace:PrototypWPFHAG"
+                 xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        Title="Such Fenster" Height="600" Width="800">
+                 xmlns:local="clr-namespace:PrototypWPFHAG"
-    <Grid>
+                 Title="PDF-Verwaltung (Admin)" 
-        <!-- 左侧垂直布局 -->
+                 Height="600" Width="1000"
-        <Grid.ColumnDefinitions>
+                 MinWidth="800" MinHeight="500"
-            <ColumnDefinition Width="200"/>
+                 WindowTitleBrush="FireBrick"
-            <!-- 左侧固定宽度 -->
+                 Icon="pack://application:,,,/Images/databaseicon.png"
-            <ColumnDefinition Width="*"/>
+                 ResizeMode="CanResizeWithGrip"
-            <!-- 右侧占满剩余空间 -->
+                 WindowStartupLocation="CenterScreen">
-        </Grid.ColumnDefinitions>
 
-        <!-- 左侧区域 -->
+    <Border BorderBrush="FireBrick" BorderThickness="3">
-        <StackPanel Orientation="Vertical" Margin="10">
+        <Grid>
-            <Grid Margin="0,0,0,10">
+            <Grid.ColumnDefinitions>
-                <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="500" MinWidth="400"/>
-                    <ColumnDefinition Width="*"/>
+                <ColumnDefinition Width="*"/>
-                    <ColumnDefinition Width="Auto"/>
+            </Grid.ColumnDefinitions>
-                </Grid.ColumnDefinitions>
-                <Grid.RowDefinitions>
-                    <RowDefinition Height="Auto"/>
-                    <RowDefinition Height="Auto"/>
-                </Grid.RowDefinitions>
-                <TextBox x:Name="TextField" Grid.Row="0" Height="50" VerticalContentAlignment="Center" Margin="0,0,5,0"/>
-                <Border Grid.Row="0" Grid.Column="1" Background="LightGray" Height="50" Margin="5,0,0,0">
-                    <TextBlock Text="Bild hochladen" VerticalAlignment="Center" HorizontalAlignment="Center"/>
-                </Border>
-                <Line Grid.Row="0" Grid.Column="1" X1="0" Y1="25" X2="1" Y2="25" Stroke="Black" StrokeThickness="1" Margin="5,0,0,0"/>
-                <Button Content="Suchen" Width="180" Height="30" Grid.Row="1" Grid.ColumnSpan="2" HorizontalAlignment="Right" Margin="0,5,0,0"/>
-            </Grid>
-            <!-- PDFField -->
-            <Grid Margin="0,0,0,10">
-                <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="*"/>
-                    <ColumnDefinition Width="Auto"/>
-                </Grid.ColumnDefinitions>
-                <Border Background="LightGray" Height="30" Margin="0,0,0,0" Grid.Column="0">
-                    <TextBlock Text="PDF hochladen" VerticalAlignment="Center" HorizontalAlignment="Center" RenderTransformOrigin="0.514,5.613"/>
-                </Border>
-                <Button Content="ADD" Width="60" Height="30" Grid.Column="1" Margin="5,0,0,0"/>
-            </Grid>
-            <Button Content="Zurück " Margin="5,380" Click="BackToLogIn_Click"/>
-        </StackPanel>
 
-        <!-- 右侧区域 -->
+            <!-- Linke Seite -->
-        <Grid Grid.Column="1" Margin="10">
+            <Border Grid.Column="0" Margin="10" Padding="10">
-            <Label Content="Zeugnisse:" HorizontalAlignment="Left" Margin="0,2,0,8"/>
+                <Grid>
-            <!-- ListField -->
+                    <Grid.RowDefinitions>
-            <ListBox x:Name="ListField" Margin="0,29,0,35" BorderThickness="1" BorderBrush="Black">
+                        <RowDefinition Height="Auto"/>
-                <ListBox.ItemTemplate>
+                        <!-- Drag & Drop -->
-                    <DataTemplate>
+                        <RowDefinition Height="Auto"/>
-                        <StackPanel Orientation="Vertical">
+                        <!-- Upload/Auswahl-Buttons -->
-                            <!-- 内容 -->
+                        <RowDefinition Height="Auto"/>
-                            <TextBlock Text="{Binding}" VerticalAlignment="Center" HorizontalAlignment="Stretch" Padding="5"/>
+                        <!-- Suchmodus -->
-                            <!-- 分隔线 -->
+                        <RowDefinition Height="Auto"/>
-                            <Border Height="1" Background="Black" Margin="0,2,0,2"/>
+                        <!-- Suchfeld -->
-                        </StackPanel>
+                        <RowDefinition Height="*"/>
-                    </DataTemplate>
+                        <!-- Suchergebnisse -->
-                </ListBox.ItemTemplate>
+                        <RowDefinition Height="Auto"/>
-            </ListBox>
+                        <!-- Status -->
+                        <RowDefinition Height="Auto"/>
+                        <!-- Zurück-Button -->
+                    </Grid.RowDefinitions>
 
+                    <!-- Drag & Drop Bereich -->
+                    <Border Grid.Row="0" Height="75" Margin="0,5"
+                            BorderBrush="Gray" BorderThickness="1">
+                        <Grid Background="Transparent" AllowDrop="True"
+                              DragEnter="PdfDropCanvas_DragEnter" 
+                              Drop="PdfDropCanvas_Drop">
+                            <TextBlock x:Name="DropHintText" Text="PDF hier rein ziehen" 
+                                       VerticalAlignment="Center" HorizontalAlignment="Center"/>
+                            <StackPanel Orientation="Horizontal" VerticalAlignment="Center">
+                                <Image x:Name="PdfIcon" Source="pack://application:,,,/Images/pdf-icon.png" 
+                                       Width="25" Height="25" Visibility="Collapsed"/>
+                                <TextBlock x:Name="PdfFileNameText" Margin="10" 
+                                           TextWrapping="Wrap" Visibility="Collapsed"/>
+                            </StackPanel>
+                        </Grid>
+                    </Border>
 
-            <!-- 删除按钮 -->
+                    <!-- Upload/Auswahl-Buttons -->
-            <Button Content="Löschen" Width="100" Height="30" HorizontalAlignment="Right" VerticalAlignment="Bottom"/>
+                    <StackPanel Grid.Row="1" Orientation="Horizontal" Margin="0,10">
+                        <Button Content="PDF hochladen" 
+                                Width="210" Height="30"
+                                Background="LightGreen" 
+                                Click="UploadButton_Click"/>
+
+                        <Button Content="PDF auswählen" 
+                                Width="210" Height="30" Margin="40,0,0,0"
+                                Background="Firebrick" 
+                                Click="ChoosePdfButton_Click"/>
+                    </StackPanel>
+
+                    <!-- Suchmodus-Auswahl -->
+                    <StackPanel Grid.Row="2" Orientation="Horizontal" Margin="0,10">
+                        <RadioButton x:Name="SearchByIdRadio" 
+                                    Content="ID" 
+                                    Margin="5" 
+                                    IsChecked="True"/>
+                        <RadioButton x:Name="SearchByTextRadio" 
+                                   Content="Text" 
+                                   Margin="5"/>
+                    </StackPanel>
+
+                    <!-- Suchfeld -->
+                    <StackPanel Grid.Row="3" Margin="0,10">
+                        <TextBox x:Name="SearchTextBox" 
+                               Margin="0,0,0,5"
+                               HorizontalAlignment="Stretch"/>
+                        <Button Content="Suchen" 
+                              x:Name="SearchButton" 
+                              Height="30"
+                              HorizontalAlignment="Stretch"
+                              Click="SearchButton_Click"/>
+                    </StackPanel>
+
+                    <!-- Suchergebnisse -->
+                    <ListBox Grid.Row="4" 
+                           x:Name="SearchResultsListBox" 
+                           Margin="0,10"
+                           DisplayMemberPath="DocumentName"
+                           ScrollViewer.VerticalScrollBarVisibility="Auto"
+                           SelectionMode="Extended"
+                           SelectionChanged="SearchResultsListBox_SelectionChanged"/>
+
+                    <!-- Status & Fortschritt -->
+                    <StackPanel Grid.Row="5" Orientation="Vertical" Margin="0,10">
+                        <TextBlock x:Name="UploadStatusText" TextAlignment="Center"/>
+                        <ProgressBar x:Name="UploadProgressBar" 
+                                   Height="10" 
+                                   Minimum="0" 
+                                   Maximum="100"
+                                   Visibility="Collapsed"/>
+                    </StackPanel>
+
+                    <!-- Zurück-Button -->
+                    <Button Grid.Row="6" 
+                          Content="Zurück zur Anmeldung" 
+                          Height="30" Margin="0,10"
+                          HorizontalAlignment="Stretch"
+                          Background="#ffd64f" 
+                          Click="BackToLogIn_Click"/>
+                </Grid>
+            </Border>
+
+            <!-- Rechte Seite -->
+            <Border Grid.Column="1" Margin="10">
+                <Grid>
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="Auto"/>
+                        <RowDefinition Height="*"/>
+                        <RowDefinition Height="Auto"/>
+                    </Grid.RowDefinitions>
+
+                    <Label Content="PDF-Inhalt:" Margin="0,0,0,5"/>
+
+                    <TextBox Grid.Row="1" 
+                           x:Name="ContentTextBox" 
+                           TextWrapping="Wrap" 
+                           AcceptsReturn="True"
+                           VerticalScrollBarVisibility="Auto" 
+                           HorizontalScrollBarVisibility="Auto"
+                           IsReadOnly="True"/>
+
+                    <Button Grid.Row="2" 
+                          Content="Löschen" 
+                          Width="100" Height="30" 
+                          Margin="0,10"
+                          HorizontalAlignment="Center"
+                          Background="Firebrick" 
+                          Click="DeleteButton_Click"/>
+                </Grid>
+            </Border>
         </Grid>
-    </Grid>
+    </Border>
-</Window>
+</mah:MetroWindow>

PrototypWPFHAG/SearchWindow.xaml.cs

@@ -1,27 +1,46 @@
-using System;
+using MahApps.Metro.Controls;
-using System.Collections.Generic;
+using System.ComponentModel;
-using System.Linq;
+using System.Diagnostics;
+using System.IO;
+using System.Net;
+using System.Net.Http;
+using System.Runtime.CompilerServices;
 using System.Text;
-using System.Threading.Tasks;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+using System.Web;
 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.Shapes;
 
 namespace PrototypWPFHAG
 {
     /// <summary>
     /// Interaktionslogik für SearchWindow.xaml
     /// </summary>
-    public partial class SearchWindow : Window
+    
+    public class DocumentResponse
     {
+        [JsonPropertyName("documents")]
+        public List<SearchResult> Documents {  get; set; }
+    }
+    public partial class SearchWindow : MetroWindow
+    {
+        public readonly HttpClient _httpClient;
+        private bool _isSearchInProgress;
+        private readonly PdfServiceClient _pdfServiceClient = new();
+        private const string BaseUrl = "http://localhost:8000"; // Microservice-URL
+        private string _selectedPdfPath;
+        private List<string> _selectedPdfPaths = new List<string>();
         public SearchWindow()
         {
             InitializeComponent();
+            _httpClient = new HttpClient
+            {
+                BaseAddress = new Uri(BaseUrl),
+                Timeout = TimeSpan.FromSeconds(30)
+            };
         }
 
         private void BackToLogIn_Click(object sender, RoutedEventArgs e)
@@ -30,5 +49,327 @@ namespace PrototypWPFHAG
                 loginWindow.Show(); // Open new window
                 this.Close(); // Close this window
         }
+        private async void SearchButton_Click(object sender, RoutedEventArgs e)
+        {
+            if (_isSearchInProgress) return;
+
+            try
+            {
+                _isSearchInProgress = true;
+                SearchButton.IsEnabled = false;
+
+                if (SearchByIdRadio.IsChecked == true)
+                {
+                    await SearchByIdAsync();
+                }
+                else
+                {
+                    await SearchBySimilarityAsync();
+                }
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"Fehler bei der Suche: {ex.Message}",
+                              "Fehler",
+                              MessageBoxButton.OK,
+                              MessageBoxImage.Error);
+            }
+            finally
+            {
+                _isSearchInProgress = false;
+                SearchButton.IsEnabled = true;
+            }
+        }
+        private async Task SearchByIdAsync()
+        {
+            if (!int.TryParse(SearchTextBox.Text, out int documentId))
+            {
+                MessageBox.Show("Bitte eine gültige ID eingeben");
+                return;
+            }
+
+            try
+            {
+                var response = await _httpClient.GetAsync($"/documents/{documentId}");
+                response.EnsureSuccessStatusCode();
+
+                var json = await response.Content.ReadAsStringAsync();
+                var result = JsonSerializer.Deserialize<DocumentDetail>(json);
+
+                await Dispatcher.InvokeAsync(() =>
+                {
+                    SearchResultsListBox.ItemsSource = new List<DocumentDetail> { result };
+                    ContentTextBox.Text = result.Content;
+                    SearchResultsListBox.DisplayMemberPath = "DocumentName";
+                });
+            }
+            catch (HttpRequestException ex) when (ex.StatusCode == HttpStatusCode.NotFound)
+            {
+                MessageBox.Show("Dokument nicht gefunden");
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"Fehler: {ex.Message}");
+            }
+        }
+
+        private async Task SearchBySimilarityAsync()
+        {
+            try
+            {
+                var encodedQuery = HttpUtility.UrlEncode(SearchTextBox.Text);
+                var response = await _httpClient.GetAsync($"/documents/search/similarity?query={encodedQuery}");
+
+                var json = await response.Content.ReadAsStringAsync();
+                var result = JsonSerializer.Deserialize<ApiResponse>(json);
+
+                await Dispatcher.InvokeAsync(() =>
+                {
+                    SearchResultsListBox.ItemsSource = result?.Documents;
+                    SearchResultsListBox.DisplayMemberPath = "DocumentName";
+                });
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show($"Fehler: {ex.Message}");
+            }
+        }
+
+        private void PdfDropCanvas_DragEnter(object sender, DragEventArgs e)
+        {
+            // Nur PDF-Dateien erlauben
+            if (e.Data.GetDataPresent(DataFormats.FileDrop))
+            {
+                var files = (string[])e.Data.GetData(DataFormats.FileDrop);
+                if (files.Any(f => System.IO.Path.GetExtension(f).Equals(".pdf", StringComparison.OrdinalIgnoreCase)))
+                {
+                    e.Effects = DragDropEffects.Copy;
+                    DropHintText.Visibility = Visibility.Collapsed; // Platzhalter ausblenden
+                }
+            }
+            else
+            {
+                e.Effects = DragDropEffects.None;
+            }
+            e.Handled = true;
+        }
+
+        private void ChoosePdfButton_Click(object sender, RoutedEventArgs e)
+        {
+            var openFileDialog = new Microsoft.Win32.OpenFileDialog
+            {
+                Filter = "PDF Files (*.pdf)|*.pdf",
+                Multiselect = true 
+            };
+
+            if (openFileDialog.ShowDialog() == true)
+            {
+                _selectedPdfPaths.AddRange(openFileDialog.FileNames);
+
+                
+                PdfIcon.Visibility = Visibility.Visible;
+                PdfFileNameText.Text = string.Join(", ", _selectedPdfPaths.Select(System.IO.Path.GetFileName));
+                PdfFileNameText.Visibility = Visibility.Visible;
+                DropHintText.Visibility = Visibility.Collapsed;
+            }
+        }
+        private void PdfDropCanvas_Drop(object sender, DragEventArgs e)
+        {
+            if (e.Data.GetDataPresent(DataFormats.FileDrop))
+            {
+                string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
+                var pdfFiles = files.Where(f => System.IO.Path.GetExtension(f).Equals(".pdf", StringComparison.OrdinalIgnoreCase)).ToList();
+
+                if (pdfFiles.Any())
+                {
+                    _selectedPdfPaths.AddRange(pdfFiles);
+
+                    // 更新UI以显示所有文件
+                    PdfIcon.Visibility = Visibility.Visible;
+                    PdfFileNameText.Text = string.Join(", ", _selectedPdfPaths.Select(System.IO.Path.GetFileName));
+                    PdfFileNameText.Visibility = Visibility.Visible;
+                    DropHintText.Visibility = Visibility.Collapsed;
+                }
+            }
+        }
+
+        // Response-Klassen
+        public class ApiResponse
+        {
+            [JsonPropertyName("success")]
+            public bool Success { get; set; }
+
+            [JsonPropertyName("document")]
+            public DocumentDetail Document { get; set; }
+
+            [JsonPropertyName("documents")]
+            public List<DocumentDetail> Documents { get; set; }
+        }
+
+        public class DocumentDetail : INotifyPropertyChanged
+        {
+            [JsonPropertyName("id")]
+            public int Id { get; set; }
+
+            [JsonPropertyName("document_name")]
+            public string DocumentName { get; set; }
+
+            [JsonPropertyName("content")]
+            public string Content { get; set; }
+
+            [JsonPropertyName("distance")]
+            public double Distance { get; set; }
+
+            private bool _isSelected;
+            public bool IsSelected
+            {
+                get => _isSelected;
+                set
+                {
+                    if (_isSelected != value)
+                    {
+                        _isSelected = value;
+                        OnPropertyChanged();
+                    }
+                }
+            }
+
+            public event PropertyChangedEventHandler PropertyChanged;
+
+            protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
+            {
+                PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
+            }
+        }
+
+        public class ApiError
+        {
+            public string Detail { get; set; }
+        }
+
+        private async void UploadButton_Click(object sender, RoutedEventArgs e)
+        {
+            if (!_selectedPdfPaths.Any())
+            {
+                MessageBox.Show("Keine PDF ausgewählt!");
+                return;
+            }
+
+            UploadProgressBar.Visibility = Visibility.Visible;
+            UploadProgressBar.Value = 0;
+            UploadStatusText.Text = "Upload läuft...";
+
+            try
+            {
+                using var formData = new MultipartFormDataContent();
+
+                foreach (var pdfPath in _selectedPdfPaths)
+                {
+                    var fileContent = new StreamContent(File.OpenRead(pdfPath));
+                    formData.Add(fileContent, "files", Path.GetFileName(pdfPath));
+                }
+
+                var response = await _httpClient.PostAsync("/upload-pdfs/", formData);
+                response.EnsureSuccessStatusCode();
+
+                var json = await response.Content.ReadAsStringAsync();
+                var result = JsonSerializer.Deserialize<ApiResponse>(json);
+
+                if (result?.Success == true)
+                {
+                    UploadStatusText.Text = "Upload erfolgreich!";
+                }
+            }
+            catch (Exception ex)
+            {
+                UploadStatusText.Text = $"Fehler: {ex.Message}";
+            }
+            finally
+            {
+                UploadProgressBar.Visibility = Visibility.Collapsed;
+                _selectedPdfPaths.Clear();
+                PdfIcon.Visibility = Visibility.Collapsed;
+                PdfFileNameText.Visibility = Visibility.Collapsed;
+                DropHintText.Visibility = Visibility.Visible;
+            }
+        }
+        private async void DeleteButton_Click(object sender, RoutedEventArgs e)
+        {
+            if (SearchResultsListBox.SelectedItems.Count == 0)
+            {
+                MessageBox.Show("Bitte Dokumente auswählen.");
+                return;
+            }
+
+            var result = MessageBox.Show(
+                $"{SearchResultsListBox.SelectedItems.Count} Dokument(e) löschen?",
+                "Bestätigung",
+                MessageBoxButton.YesNo,
+                MessageBoxImage.Warning
+            );
+
+            if (result != MessageBoxResult.Yes) return;
+
+            var deletedIds = new List<int>();
+            var errorIds = new List<int>();
+
+            foreach (var item in SearchResultsListBox.SelectedItems.Cast<DocumentDetail>().ToList())
+            {
+                try
+                {
+                    var response = await _httpClient.DeleteAsync($"/documents/{item.Id}");
+                    if (response.IsSuccessStatusCode)
+                    {
+                        deletedIds.Add(item.Id);
+                    }
+                    else
+                    {
+                        errorIds.Add(item.Id);
+                    }
+                }
+                catch
+                {
+                    errorIds.Add(item.Id);
+                }
+            }
+
+            // Aktualisiere die Liste
+            if (SearchByIdRadio.IsChecked == true)
+            {
+                await SearchByIdAsync();
+            }
+            else
+            {
+                await SearchBySimilarityAsync();
+            }
+
+            // Feedback
+            var message = new StringBuilder();
+            if (deletedIds.Count > 0) message.AppendLine($"{deletedIds.Count} Dokument(e) gelöscht.");
+            if (errorIds.Count > 0) message.AppendLine($"{errorIds.Count} Dokument(e) konnten nicht gelöscht werden.");
+
+            MessageBox.Show(message.ToString());
+        }
+
+        private async void SearchResultsListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            if (SearchResultsListBox.SelectedItem is DocumentDetail selected)
+            {
+                try
+                {
+                    var response = await _httpClient.GetAsync($"/documents/{selected.Id}/markdown");
+                    var content = await response.Content.ReadAsStringAsync();
+                    var result = JsonSerializer.Deserialize<JsonElement>(content);
+
+                    ContentTextBox.Text = result.GetProperty("document")
+                                                .GetProperty("content")
+                                                .GetString();
+                }
+                catch (Exception ex)
+                {
+                    ContentTextBox.Text = $"Fehler: {ex.Message}";
+                }
+            }
+        }
     }
 }