User schedules report done

C969Project/Data/DatabaseHelper.cs

@@ -40,6 +40,62 @@ public static class DatabaseHelper
         
         return null;
     }
+    
+    public static List<User> RetrieveUsers()
+    {
+        using MySqlConnection connection = new MySqlConnection(AppSettings.GetSetting("ConnectionStrings", "DefaultConnection"));
+        try
+        {
+            connection.Open();
+        }
+        catch (MySqlException e)
+        {
+            MessageBox.Show($"Database connection error: {e.Message}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            return new List<User>();
+        }
+        
+        List<User> users = new List<User>();
+        
+        using MySqlCommand command = new MySqlCommand("SELECT * FROM client_schedule.user", connection);
+        using MySqlDataReader reader = command.ExecuteReader();
+        while (reader.Read())
+        {
+            var user = new User(reader.GetInt32("userId"), reader.GetString("userName"));
+            
+            users.Add(user);
+        }
+        
+        return users;
+    }
+
+    public static User? RetrieveUser(int id)
+    {
+        using MySqlConnection connection = new MySqlConnection(AppSettings.GetSetting("ConnectionStrings", "DefaultConnection"));
+        try
+        {
+            connection.Open();
+        }
+        catch (MySqlException e)
+        {
+            MessageBox.Show($"Database connection error: {e.Message}", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
+            return null;
+        }
+        
+        string query = "SELECT * FROM client_schedule.user WHERE userId = @userId";
+        using MySqlCommand command = new MySqlCommand(query, connection);
+        command.Parameters.AddWithValue("@userId", id);
+
+        using MySqlDataReader reader = command.ExecuteReader();
+
+        User? user = null;
+        
+        while (reader.Read())
+        {
+            user = new User(reader.GetInt32("userId"), reader.GetString("userName"));
+        }
+        
+        return user ?? null;
+    }
 
     #region Customers
     public static List<Customer> RetrieveCustomers()

C969Project/Data/Models/User.cs

@@ -10,4 +10,9 @@ public class User
         UserId = id;
         Username = username;
     }
+
+    public override string ToString()
+    {
+        return Username;
+    }
 }