diff --git a/installer/Installer/Common.cs b/installer/Installer/Common.cs
index fc3a554..0f3697d 100644
--- a/installer/Installer/Common.cs
+++ b/installer/Installer/Common.cs
@@ -3,6 +3,8 @@ using System;
 using System.Windows.Input;
 using System.Globalization;
 using System.Windows.Data;
+using System.Windows.Controls;
+using System.Windows;
 
 namespace starter.viewmodel.common
 {
@@ -98,4 +100,58 @@ namespace starter.viewmodel.common
         }
     }
 
+    /// <summary>
+    /// Password 附加属性，来自https://blog.csdn.net/qq_43562262/article/details/121786337
+    /// </summary>
+    public class PasswordHelper
+    {
+        public static readonly DependencyProperty PasswordProperty = DependencyProperty.RegisterAttached("Password", typeof(string), typeof(PasswordHelper),
+            new PropertyMetadata(new PropertyChangedCallback(OnPropertyChanged)));
+
+        public static string GetPassword(DependencyObject d)
+        {
+            return (string)d.GetValue(PasswordProperty);
+        }
+        public static void SetPassword(DependencyObject d, string value)
+        {
+            d.SetValue(PasswordProperty, value);
+        }
+
+        public static readonly DependencyProperty AttachProperty = DependencyProperty.RegisterAttached("Attach", typeof(string), typeof(PasswordHelper),
+            new PropertyMetadata(new PropertyChangedCallback(OnAttachChanged)));
+
+        public static string GetAttach(DependencyObject d)
+        {
+            return (string)d.GetValue(AttachProperty);
+        }
+        public static void SetAttach(DependencyObject d, string value)
+        {
+            d.SetValue(AttachProperty, value);
+        }
+
+        static bool _isUpdating = false;
+        private static void OnPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            PasswordBox pb = d as PasswordBox;
+            pb.PasswordChanged -= Pb_PasswordChanged;
+            if (!_isUpdating)
+                (d as PasswordBox).Password = e.NewValue.ToString();
+            pb.PasswordChanged += Pb_PasswordChanged;
+        }
+
+        private static void OnAttachChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            PasswordBox pb = d as PasswordBox;
+            pb.PasswordChanged += Pb_PasswordChanged;
+        }
+
+        private static void Pb_PasswordChanged(object sender, RoutedEventArgs e)
+        {
+            PasswordBox pb = sender as PasswordBox;
+            _isUpdating = true;
+            SetPassword(pb, pb.Password);
+            _isUpdating = false;
+        }
+    }
+
 }
diff --git a/installer/Installer/MainWindow.xaml b/installer/Installer/MainWindow.xaml
index 993efaa..48625cc 100644
--- a/installer/Installer/MainWindow.xaml
+++ b/installer/Installer/MainWindow.xaml
@@ -71,7 +71,7 @@
                 <TextBlock Grid.Row="1" Grid.Column="0" Text="账号：" Visibility="{Binding LoginVis}" />
                 <TextBlock Grid.Row="3" Grid.Column="0" Text="密码：" Visibility="{Binding LoginVis}" />
                 <TextBox Grid.Row="1" Grid.Column="1" Name="Username" Visibility="{Binding LoginVis}" Text="{Binding Username}" />
-                <TextBox Grid.Row="3" Grid.Column="1" Name="Password" Visibility="{Binding LoginVis}" Text="{Binding Password}" />
+                <PasswordBox Grid.Row="3" Grid.Column="1" Name="Password" Visibility="{Binding LoginVis}" c:PasswordHelper.Attach="True" c:PasswordHelper.Password="{Binding Password, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
                 <!--<CheckBox Grid.Row="5" Grid.Column="0" Visibility="{Binding LoginVis}">记住我</CheckBox>-->
                 <TextBlock Grid.Row="5" Grid.Column="1" Foreground="Red" Text="    用户名或密码错误！" Visibility="{Binding LoginFailVis}"/>
             </Grid>
diff --git a/installer/Installer/Model.cs b/installer/Installer/Model.cs
index 371bd97..a6ee504 100644
--- a/installer/Installer/Model.cs
+++ b/installer/Installer/Model.cs
@@ -124,7 +124,7 @@ namespace starter.viewmodel.settings
             }
         }
 
-        public async Task<bool> Login()
+        public async Task<int> Login()
         {
             return await web.LoginToEEsast(client, Username, Password);
         }
@@ -1057,43 +1057,50 @@ namespace WebConnect
     {
         public enum language { cpp, py };
         public static string logintoken = "";
-        async public Task<bool> LoginToEEsast(HttpClient client, string useremail, string password)
+        async public Task<int> LoginToEEsast(HttpClient client, string useremail, string password)
         {
             string token = "";
-            using (var response = await client.PostAsync("https://api.eesast.com/users/login", JsonContent.Create(new
-            {
-                email = useremail,
-                password = password,
-            })))
+            try
             {
-                switch (response.StatusCode)
+                using (var response = await client.PostAsync("https://api.eesast.com/users/login", JsonContent.Create(new
                 {
-                    case System.Net.HttpStatusCode.OK:
-                        Console.WriteLine("Success login");
-                        token = (System.Text.Json.JsonSerializer.Deserialize(await response.Content.ReadAsStreamAsync(), typeof(LoginResponse), new JsonSerializerOptions()
-                        {
-                            PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
-                        }) as LoginResponse)
-                                    ?.Token ??
-                                throw new Exception("no token!");
-                        logintoken = token;
-                        SaveToken();
-                        var info = JsonConvert.DeserializeObject<Dictionary<string, string>>(await response.Content.ReadAsStringAsync());
-                        Downloader.UserInfo._id = info["_id"];
-                        Downloader.UserInfo.email = info["email"];
-                        break;
+                    email = useremail,
+                    password = password,
+                })))
+                {
+                    switch (response.StatusCode)
+                    {
+                        case System.Net.HttpStatusCode.OK:
+                            Console.WriteLine("Success login");
+                            token = (System.Text.Json.JsonSerializer.Deserialize(await response.Content.ReadAsStreamAsync(), typeof(LoginResponse), new JsonSerializerOptions()
+                            {
+                                PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+                            }) as LoginResponse)
+                                        ?.Token ??
+                                    throw new Exception("no token!");
+                            logintoken = token;
+                            SaveToken();
+                            var info = JsonConvert.DeserializeObject<Dictionary<string, string>>(await response.Content.ReadAsStringAsync());
+                            Downloader.UserInfo._id = info["_id"];
+                            Downloader.UserInfo.email = info["email"];
+                            break;
 
-                    default:
-                        int code = ((int)response.StatusCode);
-                        Console.WriteLine(code);
-                        if (code == 401)
-                        {
-                            //Console.WriteLine("邮箱或密码错误！");
-                            return false;
-                        }
-                        break;
+                        default:
+                            int code = ((int)response.StatusCode);
+                            Console.WriteLine(code);
+                            if (code == 401)
+                            {
+                                //Console.WriteLine("邮箱或密码错误！");
+                                return -1;
+                            }
+                            break;
+                    }
+                    return 0;
                 }
-                return true;
+            }
+            catch
+            {
+                return -2;
             }
         }
         /// <summary>
diff --git a/installer/Installer/ViewModel.cs b/installer/Installer/ViewModel.cs
index b776fa8..8461acd 100644
--- a/installer/Installer/ViewModel.cs
+++ b/installer/Installer/ViewModel.cs
@@ -481,15 +481,19 @@ namespace starter.viewmodel.settings
                 {
                     clickLoginCommand = new BaseCommand(new Action<object>(async o =>
                     {
-                        if (!(await obj.Login()))
+                        switch(await obj.Login())
                         {
-                            obj.LoginFailed = true;
-                        }
-                        else
-                        {
-                            obj.LoginFailed = false;
-                            Status = SettingsModel.Status.web;
-                            this.RaisePropertyChanged("CoverVis");
+                            case -1:
+                                obj.LoginFailed = true;
+                                break;
+                            case 0:
+                                obj.LoginFailed = false;
+                                Status = SettingsModel.Status.web;
+                                this.RaisePropertyChanged("CoverVis");
+                                break;
+                            case -2:
+                                MessageBox.Show("无法连接服务器，请检查网络情况", "网络错误", MessageBoxButton.OK, MessageBoxImage.Warning, MessageBoxResult.OK);
+                                break;
                         }
                         this.RaisePropertyChanged("LoginFailVis");
                     }));