优化登录逻辑，添加聊天界面。

chatclient/Data/ChatDataModel.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Media;
+using System.Windows;
+using System.Windows.Media.Imaging;
+
+namespace chatclient.Data
+{
+    /// <summary>
+    /// 聊天消息类，表示一条消息的内容和显示属性
+    /// </summary>
+    public class ChatMessage
+    {
+        /// <summary>
+        /// 发送者名称
+        /// </summary>
+        public required string Sender { get; set; }
+        /// <summary>
+        /// 消息类型（文本、图片、文件、系统消息等）
+        /// </summary>
+        public required MessageType Type { get; set; } = MessageType.Text;
+        /// <summary>
+        /// 消息发送者的头像图片
+        /// </summary>
+        public required BitmapImage Image { get; set; }
+        /// <summary>
+        /// 消息内容
+        /// </summary>
+        public required string Content { get; set; }
+        /// <summary>
+        /// 消息发送时间
+        /// </summary>
+        public DateTime Timestamp { get; set; }
+        /// <summary>
+        /// 消息在界面中的对齐方式（左/右）
+        /// </summary>
+        public HorizontalAlignment Alignment { get; set; } = HorizontalAlignment.Left;
+        /// <summary>
+        /// 发送者名称的显示颜色
+        /// </summary>
+        public Brush SenderColor { get; set; } = Brushes.Black;
+    }
+    public enum MessageType
+    {
+        Text,
+        Image,//图片
+        File,//文件
+        System//系统信息
+    }
+}

chatclient/Data/chatapi.cs

@@ -1,5 +1,4 @@
-
+namespace chatclient.Data
-namespace chatapi
 {
     internal class Server 
     {

chatclient/LoginWindow.xaml.cs

@@ -6,9 +6,9 @@ using System.Threading.Tasks;
 using System.Windows;
 using System.Net.Sockets;
 using log4net;
-using chatapi;
 using System.Net.Http;
 using Microsoft.Win32;
+using chatclient.Data;
 
 
 namespace chatclient
@@ -126,7 +126,7 @@ namespace chatclient
                 string SignJsonData = JsonSerializer.Serialize(SignData);
                 byte[] dataBytes = Encoding.UTF8.GetBytes(SignJsonData);
                 var content = new StringContent(SignJsonData, Encoding.UTF8, "application/json");
-                var response = await MainWindow.HttpClient.PostAsync($"{chatapi.Server.ServerUrl}/api/register", content);
+                var response = await MainWindow.HttpClient.PostAsync($"{Server.ServerUrl}/api/register", content);
                 var responseBody = await response.Content.ReadAsStringAsync();
                 log.Info($"注册请求已发送，响应内容: {responseBody}");
                 var signresponse = JsonSerializer.Deserialize<SignResultData>(responseBody);

chatclient/MainWindow.xaml

@@ -27,7 +27,72 @@
                         </StackPanel>
                     </TabItem.Header>
                     <Grid>
-                        
+                        <Grid>
+                            <Grid.RowDefinitions>
+                                <RowDefinition Height="Auto"/>
+                                <!-- 标题栏 -->
+                                <RowDefinition Height="*"/>
+                                <!-- 消息区域 -->
+                                <RowDefinition Height="Auto"/>
+                                <!-- 输入区域 -->
+                            </Grid.RowDefinitions>
+
+                            <!-- 标题栏 -->
+                            <materialDesign:Card Grid.Row="0" Padding="10" Margin="0,0,0,5">
+                                <StackPanel Orientation="Horizontal">
+                                    <TextBlock Text="聊天室" FontSize="16" FontWeight="Bold" 
+                       VerticalAlignment="Center" Margin="5,0" Cursor="Hand"/>
+                                    <!--<Button x:Name="btnRefresh" Style="{StaticResource MaterialDesignIconButton}" 
+                    ToolTip="刷新列表" Click="RefreshContacts_Click" Margin="5,0,10,0">
+                                        <materialDesign:PackIcon Kind="Refresh"/>
+                                    </Button>-->
+                                    <!--<ComboBox x:Name="cmbContacts" Width="150" Margin="5,0"
+                      materialDesign:HintAssist.Hint="选择联系人"
+                      DisplayMemberPath="DisplayName"/>-->
+                                </StackPanel>
+                            </materialDesign:Card>
+
+                            <!-- 消息区域 -->
+                            <ScrollViewer x:Name="messageScroller" Grid.Row="1" VerticalScrollBarVisibility="Auto"
+                  Padding="10" Background="{DynamicResource MaterialDesignPaper}">
+                                <ItemsControl x:Name="messageList">
+                                    <ItemsControl.ItemTemplate>
+                                        <DataTemplate>
+                                            <materialDesign:Card Margin="0,5" Padding="10" 
+                                         HorizontalAlignment="{Binding Alignment}">
+                                                <StackPanel>
+                                                    <TextBlock Text="{Binding Sender}" FontWeight="Bold" 
+                                       Foreground="{Binding SenderColor}"/>
+                                                    <TextBlock Text="{Binding Content}" TextWrapping="Wrap"
+                                       Margin="0,5,0,0"/>
+                                                    <TextBlock Text="{Binding Timestamp, StringFormat='HH:mm:ss'}" 
+                                       Foreground="Gray" FontSize="10" 
+                                       HorizontalAlignment="Right" Margin="0,5,0,0"/>
+                                                </StackPanel>
+                                            </materialDesign:Card>
+                                        </DataTemplate>
+                                    </ItemsControl.ItemTemplate>
+                                </ItemsControl>
+                            </ScrollViewer>
+
+                            <!-- 输入区域 -->
+                            <Grid Grid.Row="2" Margin="0,5,0,0">
+                                <Grid.ColumnDefinitions>
+                                    <ColumnDefinition Width="*"/>
+                                    <ColumnDefinition Width="Auto"/>
+                                </Grid.ColumnDefinitions>
+
+                                <TextBox x:Name="txtMessage" Grid.Column="0" Margin="0,0,5,0" 
+                 materialDesign:HintAssist.Hint="输入消息..." 
+                 AcceptsReturn="True" VerticalScrollBarVisibility="Auto"
+                 TextWrapping="Wrap" MinHeight="60" MaxHeight="120"
+                 KeyDown="MessageInput_KeyDown"/>
+
+                                <Button x:Name="btnSend" Grid.Column="1" Content="发送" MinWidth="80"
+                Style="{StaticResource MaterialDesignRaisedButton}"
+                Click="SendMessage_Click"/>
+                            </Grid>
+                        </Grid>
                     </Grid>
                 </TabItem>
                 <TabItem>

chatclient/MainWindow.xaml.cs

@@ -1,7 +1,6 @@
 using System.Text;
 using System.Windows;
 using System.Windows.Controls;
-using System.Windows.Data;
 using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
@@ -17,11 +16,11 @@ using System.Security.Policy;
 using log4net;
 using log4net.Config;
 using System.Text.Json;
-using chatapi;
+using chatclient.Data;
-using System.Diagnostics;
-using System.Windows.Interop;
-using ControlzEx.Standard;
 using System.ComponentModel;
+using System.Collections.ObjectModel;
+using System.Windows.Threading;
+using System.Collections.Specialized;
 
 [assembly: XmlConfigurator(ConfigFile = "config/log4net.config", Watch = true)]
 namespace chatclient
@@ -38,7 +37,7 @@ namespace chatclient
         public static Socket? Client;
         public static readonly HttpClient HttpClient = new HttpClient();
         public event PropertyChangedEventHandler? PropertyChanged;
-        private string? _Username;
+    private string? _Username;
         public string? Username
         {
             get { return _Username; }
@@ -48,6 +47,10 @@ namespace chatclient
                 Update("Username");
             }
         }
+        // 消息列表
+        public ObservableCollection<ChatMessage> Messages { get; } = new ObservableCollection<ChatMessage>();
+        private ItemsControl MessageList => messageList;
+        private ScrollViewer MessageScroller => messageScroller;
         private void Update(string UpdateName)
         {
             PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(UpdateName));
@@ -72,8 +75,16 @@ namespace chatclient
             Login.Show();
             Thread th = new Thread(Receive);
             th.Start();
+            MessageList.ItemsSource = Messages;
+            ((INotifyCollectionChanged)MessageList.Items).CollectionChanged += (s, e) =>
+            {
+                // 确保有足够的时间让UI更新  
+                Dispatcher.BeginInvoke(new Action(() =>
+                {
+                    MessageScroller.ScrollToEnd();
+                }), DispatcherPriority.ContextIdle);
+            };
         }
-
         static void Receive()
         {
             byte[] buffer = new byte[1024];
@@ -129,26 +140,41 @@ namespace chatclient
                                 }
                             });
                         }
-                        else if (LoginResponse != null)
-                        {
-                            log.Warn($"登录失败: {LoginResponse.message}\nMsg:{msg}");
-                            var loginWindow = Application.Current.Windows.OfType<LoginWindow>().FirstOrDefault();
-                            loginWindow!.LoginMsg = LoginResponse.message;
-                        }
-                    }
-                    else if (Type.type == "login_0")
-                    {
-                        if (LoginResponse != null)
-                        {
-                            var loginWindow = Application.Current.Windows.OfType<LoginWindow>().FirstOrDefault();
-                            loginWindow!.LoginMsg = LoginResponse.message;
-                        }
                         else
                         {
-                            var loginWindow = Application.Current.Windows.OfType<LoginWindow>().FirstOrDefault();
+                            Application.Current.Dispatcher.Invoke(() =>
-                            loginWindow!.LoginMsg = "服务器返回错误";
+                            {
+                                var loginWindow = Application.Current.Windows.OfType<LoginWindow>().FirstOrDefault();
+                                if (loginWindow != null)
+                                {
+                                    loginWindow.LoginMsg = LoginResponse != null ? LoginResponse.message : "服务器返回错误";
+                                }
+                            });
                         }
                     }
+                    else if(Type.type == "login_0" && LoginResponse != null)
+                        {
+                        log.Warn($"登录失败: {LoginResponse.message}\nMsg:{msg}");
+                        Application.Current.Dispatcher.Invoke(() =>
+                        {
+                            var loginWindow = Application.Current.Windows.OfType<LoginWindow>().FirstOrDefault();
+                            if (loginWindow != null)
+                            {
+                                loginWindow.LoginMsg = LoginResponse.message;
+                            }
+                        });
+                    }
+                    else
+                    {
+                        Application.Current.Dispatcher.Invoke(() =>
+                        {
+                            var loginWindow = Application.Current.Windows.OfType<LoginWindow>().FirstOrDefault();
+                            if (loginWindow != null)
+                            {
+                                loginWindow.LoginMsg = LoginResponse != null ? LoginResponse.message : "服务器返回错误";
+                            }
+                        });
+                    }
                 }
             }
             catch (JsonException ex)
@@ -160,5 +186,44 @@ namespace chatclient
                 log.Error("处理响应时发生错误", ex);
             }
         }
+        private void SendMessage_Click(object sender, RoutedEventArgs e)
+        {
+            SendMessage();
+        }
+        private void SendMessage()
+        {
+            if (string.IsNullOrWhiteSpace(txtMessage.Text))
+                return;
+
+            // 获取当前选中的联系人
+            //var contact = cmbContacts.SelectedItem as Contact;
+            // 判断是否为群组，若是则收件人设为“所有人”，否则为联系人显示名
+            //string recipient = contact?.IsGroup == true ? "所有人" : contact?.DisplayName;
+
+            // 创建新消息
+            var newMessage = new ChatMessage
+            {
+                Sender = "我",
+                Type = MessageType.Text,
+                Image = new BitmapImage(new Uri("pack://application:,,,/user.png", UriKind.Absolute)), // 默认头像
+                Content = txtMessage.Text,
+                Timestamp = DateTime.Now,
+                Alignment = HorizontalAlignment.Right, // 自己发送的消息靠右
+                SenderColor = new SolidColorBrush(Colors.Blue)
+            };
+            // 添加到消息列表
+            Messages.Add(newMessage);
+            // 清空输入框
+            txtMessage.Clear();
+        }
+        // 消息输入框回车事件
+        private void MessageInput_KeyDown(object sender, KeyEventArgs e)
+        {
+            if (e.Key == Key.Enter && Keyboard.Modifiers != ModifierKeys.Shift)
+            {
+                SendMessage();
+                e.Handled = true; // 阻止换行
+            }
+        }
     }
 }