diff --git a/src/RoleEditor/MainWindow.xaml b/src/RoleEditor/MainWindow.xaml
index 0a30e97..8cf5eed 100644
--- a/src/RoleEditor/MainWindow.xaml
+++ b/src/RoleEditor/MainWindow.xaml
@@ -84,7 +84,24 @@
                         </Grid>
                     </GroupBox>
                     <GroupBox Header="Port Assignment" Margin="2" Grid.Row="0" Grid.Column="1">
-                        <xctk:CheckListBox x:Name="checkListBoxPortAssignment" Margin="2" />
+                        <Grid>
+                            <Grid.RowDefinitions>
+                                <RowDefinition Height="28" />
+                                <RowDefinition Height="28" />
+                                <RowDefinition Height="*" />
+                            </Grid.RowDefinitions>
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition Width="*" />
+                                <ColumnDefinition Width="60" />
+                            </Grid.ColumnDefinitions>
+                            <ListBox x:Name="listBoxPortAssignment" Margin="2" Grid.Row="0" Grid.Column="0" Grid.RowSpan="3" />
+                            <Button x:Name="buttonAddPortAssignment" Margin="2" Grid.Row="0" Grid.Column="1" Click="buttonAddPortAssignment_Click">
+                                <Image Source="./Resources/arrow_left_green.png"/>
+                            </Button>
+                            <Button x:Name="buttonRemovePortAssignment" Margin="2" Grid.Row="1" Grid.Column="1" Click="buttonRemovePortAssignment_Click">
+                                <Image Source="./Resources/delete2.png"/>
+                            </Button>
+                        </Grid>
                     </GroupBox>
                     <GroupBox Header="Ports" Margin="2" Grid.Row="0" Grid.Column="2">
                         <Grid>
@@ -117,8 +134,8 @@
                             </ListBox>
                             <Label Grid.Row="0" Grid.Column="1" Content="Name" HorizontalAlignment="Right"/>
                             <Label Grid.Row="1" Grid.Column="1" Content="Locode" HorizontalAlignment="Right"/>
-                            <TextBox x:Name="textBoxPortName" Grid.Row="0" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" />
-                            <TextBox x:Name="textBoxPortLocode" Grid.Row="1" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" />
+                            <TextBox x:Name="textBoxPortName" Grid.Row="0" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" MaxLength="128"/>
+                            <TextBox x:Name="textBoxPortLocode" Grid.Row="1" Grid.Column="2" Margin="2" VerticalContentAlignment="Center" MaxLength="5" />
 
                             <Button x:Name="buttonPortSave" Grid.Row="2" Grid.Column="2" Click="buttonPortSave_Click" Margin="2">
                                 <DockPanel>
diff --git a/src/RoleEditor/MainWindow.xaml.cs b/src/RoleEditor/MainWindow.xaml.cs
index cb30035..a4252ba 100644
--- a/src/RoleEditor/MainWindow.xaml.cs
+++ b/src/RoleEditor/MainWindow.xaml.cs
@@ -38,6 +38,8 @@ namespace RoleEditor
         private readonly ObservableCollection<SecurableAssignment> _assignedSecurables = new ObservableCollection<SecurableAssignment>();
         private readonly ObservableCollection<Berth> _berths = new ObservableCollection<Berth>();
         private readonly ObservableCollection<Ship> _ships = new ObservableCollection<Ship>();
+        private readonly ObservableCollection<Port> _ports = new ObservableCollection<Port>();
+        private readonly ObservableCollection<PortAssignment> _assignedPorts = new ObservableCollection<PortAssignment>();
         private DBManager _dbManager;
 
         #endregion
@@ -114,10 +116,16 @@ namespace RoleEditor
                 this.dataGridShips.EditRequested += DataGridShips_EditRequested;
                 this.dataGridShips.DeleteRequested += DataGridShips_DeleteRequested;
 
+                // load all ports
+                foreach(Port port in await Port.LoadAll(_dbManager)) _ports.Add(port);
+                this.listBoxPort.ItemsSource = _ports;                
+
+
                 // set other item sources (filled later after selection)
                 this.listBoxUser.ItemsSource = _users;                
                 this.listBoxRoleSecurables.ItemsSource = _assignedSecurables;
                 this.listBoxUserRoles.ItemsSource = _assignedRoles;
+                this.listBoxPortAssignment.ItemsSource = _assignedPorts;
 
                 this.comboBoxParticipantType.ItemsSource = EnumHelper.GetAllValuesAndDescription(typeof(Participant.ParticipantType));
 
@@ -386,6 +394,59 @@ namespace RoleEditor
             }
         }
 
+        private async void buttonPortSave_Click(object sender, RoutedEventArgs e)
+        {
+            Port? p = this.listBoxPort.SelectedItem as Port;
+            if (p != null)
+            {
+                p.Name = this.textBoxPortName.Text.Trim();
+                p.Locode = this.textBoxPortLocode.Text.Trim();
+                await p.Save(_dbManager);
+                this.listBoxPort.ItemsSource = null;
+                this.listBoxPort.ItemsSource = _ports;
+                this.listBoxPort.SelectedItem = p;
+            }
+        }
+
+        private async void buttonAddPortAssignment_Click(object sender, RoutedEventArgs e)
+        {
+            if ((this.listBoxPort.SelectedItem is Port p) && (this.listBoxParticipant.SelectedItem is Participant pa))
+            {
+                // test if assignment is already present
+                bool foundMatchingAssignment = false;
+                foreach (PortAssignment portAssignment in _assignedPorts)
+                {
+                    if ((portAssignment.PortId == p.Id) && (portAssignment.ParticipantId == pa.Id))
+                    {
+                        foundMatchingAssignment = true;
+                        break;
+                    }
+                }
+
+                if (!foundMatchingAssignment)
+                {
+                    PortAssignment portAssignment = new PortAssignment();
+                    portAssignment.PortId = (int)p.Id;
+                    portAssignment.ParticipantId = (int)pa.Id;
+                    portAssignment.AssignedParticipant = pa;
+                    portAssignment.AssignedPort = p;
+                    await portAssignment.Save(_dbManager);
+                    _assignedPorts.Add(portAssignment);
+                }
+            }
+        }
+
+        private async void buttonRemovePortAssignment_Click(object sender, RoutedEventArgs e)
+        {
+            PortAssignment? pa = this.listBoxPortAssignment.SelectedItem as PortAssignment;
+            if (pa != null)
+            {
+                await pa.Delete(_dbManager);
+                if (_assignedPorts.Contains(pa))
+                    _assignedPorts.Remove(pa);
+            }
+        }
+
         #endregion
 
         #region listbox selection callbacks
@@ -430,6 +491,19 @@ namespace RoleEditor
                 foreach (User u in await User.LoadForParticipant(p, _dbManager))
                     _users.Add(u);
             }
+
+            // -> load port assignments for this participant selection
+            this._assignedPorts.Clear();
+            if(p != null)
+            {
+                foreach (PortAssignment pa in await PortAssignment.LoadForParticipant(p, this._dbManager))
+                {
+                    foreach (Port port in this._ports)
+                        if (pa.PortId == port.Id)
+                            pa.AssignedPort = port;
+                    _assignedPorts.Add(pa);
+                }
+            }
         }
 
         private async void listBoxRoles_SelectionChanged(object sender, SelectionChangedEventArgs e)
@@ -496,6 +570,13 @@ namespace RoleEditor
             this.textBoxSecurableName.Text = (s != null) ? s.Name : string.Empty;
         }
 
+        private void listBoxPort_SelectionChanged(object sender, SelectionChangedEventArgs e)
+        {
+            Port? p = this.listBoxPort.SelectedItem as Port;
+            this.textBoxPortName.Text = (p != null) ? p.Name : string.Empty;
+            this.textBoxPortLocode.Text = (p != null) ? p.Locode : string.Empty;
+        }
+
         #endregion
 
         #region menuitem callbacks
@@ -597,6 +678,29 @@ namespace RoleEditor
             }
         }
 
+        private void menuItemNewPort_Click(object sender, RoutedEventArgs e)
+        {
+            Port p = new();
+            this._ports.Add(p);
+            this.listBoxPort.SelectedItem = p;
+        }
+
+        private async void menuItemDeletePort_Click(object sender, RoutedEventArgs e)
+        {
+            try
+            {
+                if (this.listBoxPort.SelectedItem is Port p)
+                {
+                    await p.Delete(_dbManager);
+                    this._ports.Remove(p);
+                }
+            }
+            catch (Exception ex)
+            {
+                MessageBox.Show(ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
+            }
+        }
+
         #endregion
 
         #region Excel import
@@ -801,25 +905,6 @@ namespace RoleEditor
         }
 
         #endregion
-
-        private void menuItemNewPort_Click(object sender, RoutedEventArgs e)
-        {
-
-        }
-
-        private void listBoxPort_SelectionChanged(object sender, SelectionChangedEventArgs e)
-        {
-
-        }
-
-        private void menuItemDeletePort_Click(object sender, RoutedEventArgs e)
-        {
-
-        }
-
-        private void buttonPortSave_Click(object sender, RoutedEventArgs e)
-        {
-
-        }
+              
     }
 }
diff --git a/src/RoleEditor/Properties/Settings.Designer.cs b/src/RoleEditor/Properties/Settings.Designer.cs
index eab12af..c0ea20b 100644
--- a/src/RoleEditor/Properties/Settings.Designer.cs
+++ b/src/RoleEditor/Properties/Settings.Designer.cs
@@ -12,7 +12,7 @@ namespace RoleEditor.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.5.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "17.10.0.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
@@ -25,8 +25,8 @@ namespace RoleEditor.Properties {
         
         [global::System.Configuration.ApplicationScopedSettingAttribute()]
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-        [global::System.Configuration.DefaultSettingValueAttribute("Server=localhost;User ID=ds;Password=HalloWach_2323XXL!!;Database=bremen_calling;" +
-            "Port=33306")]
+        [global::System.Configuration.DefaultSettingValueAttribute("Server=localhost;User ID=ds;Password=HalloWach_2323XXL!!;Database=bremen_calling_" +
+            "devel;Port=33306")]
         public string ConnectionString {
             get {
                 return ((string)(this["ConnectionString"]));
diff --git a/src/RoleEditor/Properties/Settings.settings b/src/RoleEditor/Properties/Settings.settings
index 497dc89..33aa443 100644
--- a/src/RoleEditor/Properties/Settings.settings
+++ b/src/RoleEditor/Properties/Settings.settings
@@ -3,7 +3,7 @@
   <Profiles />
   <Settings>
     <Setting Name="ConnectionString" Type="System.String" Scope="Application">
-      <Value Profile="(Default)">Server=localhost;User ID=ds;Password=HalloWach_2323XXL!!;Database=bremen_calling;Port=33306</Value>
+      <Value Profile="(Default)">Server=localhost;User ID=ds;Password=HalloWach_2323XXL!!;Database=bremen_calling_devel;Port=33306</Value>
     </Setting>
   </Settings>
 </SettingsFile>
\ No newline at end of file
diff --git a/src/brecal.model/Participant.cs b/src/brecal.model/Participant.cs
index e2a8119..cc15705 100644
--- a/src/brecal.model/Participant.cs
+++ b/src/brecal.model/Participant.cs
@@ -70,7 +70,7 @@ namespace brecal.model
 
         public static List<DbEntity> LoadElems(IDataReader reader)
         {
-            List<DbEntity> result = new List<DbEntity>();
+            List<DbEntity> result = new();
             while (reader.Read())
             {
                 Participant p = new();
diff --git a/src/brecal.model/Port.cs b/src/brecal.model/Port.cs
index 5a48270..0346281 100644
--- a/src/brecal.model/Port.cs
+++ b/src/brecal.model/Port.cs
@@ -22,7 +22,7 @@ namespace brecal.model
 
         public override void SetCreate(IDbCommand cmd)
         {
-            cmd.CommandText = "INSERT INTO role (name, locode) VALUES ( @NAME, @LOCODE)";
+            cmd.CommandText = "INSERT INTO port (name, locode) VALUES ( @NAME, @LOCODE)";
             this.SetParameters(cmd);
         }
 
@@ -56,12 +56,12 @@ namespace brecal.model
 
         public static void SetLoadQuery(IDbCommand cmd, params object?[] list)
         {
-            cmd.CommandText = "SELECT id, name, locode, created, modified, deleted FROM port";
+            cmd.CommandText = "SELECT id, name, locode, created, modified, deleted FROM port WHERE deleted = 0";
         }
 
         public static List<DbEntity> LoadElems(IDataReader reader)
         {
-            List<DbEntity> result = new List<DbEntity>();
+            List<DbEntity> result = new();
             while (reader.Read())
             {
                 Port p = new();
@@ -100,6 +100,15 @@ namespace brecal.model
 
         #endregion
 
+        #region overrides
+
+        public override string ToString()
+        {
+            return $"{Name} ({Locode})";
+        }
+
+        #endregion
+
     }
 
 
diff --git a/src/brecal.model/PortAssignment.cs b/src/brecal.model/PortAssignment.cs
index 17ddc22..eaee03f 100644
--- a/src/brecal.model/PortAssignment.cs
+++ b/src/brecal.model/PortAssignment.cs
@@ -36,7 +36,7 @@ namespace brecal.model
         public static void SetLoadQuery(IDbCommand cmd, params object?[] args)
         {
             cmd.CommandText = "SELECT id, participant_id, port_id FROM participant_port_map WHERE participant_id = @PID";
-            if (args.Length != 1 || !(args[0] is Participant))
+            if (args.Length != 1 || args[0] is not Participant)
                 throw new ArgumentException("loader needs single participant as argument");
             IDataParameter pid = cmd.CreateParameter();
             pid.ParameterName = "PID";
@@ -47,7 +47,7 @@ namespace brecal.model
 
         public static List<DbEntity> LoadElems(IDataReader reader)
         {
-            List<DbEntity> result = new List<DbEntity>();
+            List<DbEntity> result = new();
             while (reader.Read())
             {
                 PortAssignment ra = new();
diff --git a/src/brecal.mysql/DBManager.cs b/src/brecal.mysql/DBManager.cs
index d5c5571..8809061 100644
--- a/src/brecal.mysql/DBManager.cs
+++ b/src/brecal.mysql/DBManager.cs
@@ -17,7 +17,7 @@ namespace brecal.mysql
 
         public async Task<List<DbEntity>> Load(QueryFunc prepareAction, LoadFunc<IDataReader> loadAction, params object?[] args)
         {
-            await using MySqlConnection connection = new MySqlConnection(_connectionString);
+            await using MySqlConnection connection = new(_connectionString);
             await connection.OpenAsync();
             
             using MySqlCommand cmd = new();
@@ -31,7 +31,7 @@ namespace brecal.mysql
 
         public async Task<object?> ExecuteScalar(Action<IDbCommand> prepareAction)
         {
-            await using MySqlConnection connection = new MySqlConnection(_connectionString);
+            await using MySqlConnection connection = new(_connectionString);
             await connection.OpenAsync();
 
             using MySqlCommand cmd = new();