diff --git a/PrototypWPFHAG/MainWindow.xaml b/PrototypWPFHAG/MainWindow.xaml
index 8e57ed9..6a87c50 100644
--- a/PrototypWPFHAG/MainWindow.xaml
+++ b/PrototypWPFHAG/MainWindow.xaml
@@ -25,7 +25,7 @@
                 <PasswordBox Width="200" Height="30" Margin="0,5,0,0" x:Name="PasswordTextBox" />
 
                 <!-- 登录按钮 -->
-                <Button Height="30" Width="100" Content="Log in" Margin="0,20,0,0" Click="loginButton_Click" />
+                <Button Height="30" Width="100" Content="Log in" Margin="0,20,0,0" Click="LoginButton_Click" />
             </StackPanel>
         </Border>
     </Grid>
diff --git a/PrototypWPFHAG/MainWindow.xaml.cs b/PrototypWPFHAG/MainWindow.xaml.cs
index 020e7b2..9528ac4 100644
--- a/PrototypWPFHAG/MainWindow.xaml.cs
+++ b/PrototypWPFHAG/MainWindow.xaml.cs
@@ -1,4 +1,6 @@
 using System.Data;
+using System.Runtime.InteropServices;
+using System.Security.Principal;
 using System.Text;
 using System.Windows;
 using System.Windows.Controls;
@@ -23,51 +25,11 @@ public partial class MainWindow : MetroWindow
     public MainWindow()
     {
         InitializeComponent();
-       // TestConnection();
-       // Console.ReadKey();
+        //TestConnection();
+        //Console.ReadKey();
 
     }
 
-    private void loginButton_Click(object sender, RoutedEventArgs e)
-    {
-        // 从用户输入中获取用户名和密码
-        string username = UsernameTextBox.Text;          // 获取用户名
-        string password = PasswordTextBox.Password;      // 获取密码
-
-        // 调用 ValidateUser 方法验证用户凭据
-        if (ValidateUser(username, password))
-        {
-            MessageBox.Show("ok", "Login Successful", MessageBoxButton.OK, MessageBoxImage.Error);
-
-        }
-        else
-        {
-            // 如果验证失败，显示错误信息
-            MessageBox.Show("Invalid username or password.", "Login Failed", MessageBoxButton.OK, MessageBoxImage.Error);
-        }
-    }
-
-    private bool ValidateUser(string username, string password)
-    {
-        // 获取数据库连接
-        using (var con = GetConnection())
-        {
-            con.Open(); // 打开数据库连接
-            string query = "SELECT COUNT(*) FROM USER WHERE UserName = @username AND Password = @password;";
-
-            using (var cmd = new NpgsqlCommand(query, con))
-            {
-                // 使用参数化查询防止 SQL 注入
-                cmd.Parameters.AddWithValue("@username", username);
-                cmd.Parameters.AddWithValue("@password", password);
-
-                // 执行查询并获取结果
-                int count = (int)cmd.ExecuteScalar();
-                return count > 0; // 如果匹配记录数量大于 0，返回 true
-            }
-        }
-    }
-
     private static void TestConnection()
     {
         using (NpgsqlConnection con = GetConnection())
@@ -81,7 +43,7 @@ public partial class MainWindow : MetroWindow
     }
     private static NpgsqlConnection GetConnection()
     {
-        return new NpgsqlConnection(@"Server=localhost;Port=5432;User Id=postgres;Password=postgres;Database=postgres;");
+        return new NpgsqlConnection(@"Server=localhost;Port=7854;User Id=postgres;Database=postgres;");
     }
 
     //class Program
diff --git a/PrototypWPFHAG/PrototypWPFHAG.csproj b/PrototypWPFHAG/PrototypWPFHAG.csproj
index 0db60b9..ac26644 100644
--- a/PrototypWPFHAG/PrototypWPFHAG.csproj
+++ b/PrototypWPFHAG/PrototypWPFHAG.csproj
@@ -24,7 +24,9 @@
 
   <ItemGroup>
     <PackageReference Include="MahApps.Metro" Version="2.4.10" />
+    <PackageReference Include="Microsoft.AspNetCore.Authentication" Version="2.3.0" />
     <PackageReference Include="Microsoft.AspNetCore.Authentication.Negotiate" Version="9.0.3" />
+    <PackageReference Include="Microsoft.Identity.Client" Version="4.69.1" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="Npgsql" Version="9.0.3" />
     <PackageReference Include="PdfPig" Version="0.1.10" />