diff --git a/BootstrapAdmin-Blazor.slnf b/BootstrapAdmin-Blazor.slnf
index 94ec6aaa..5f6d75ed 100644
--- a/BootstrapAdmin-Blazor.slnf
+++ b/BootstrapAdmin-Blazor.slnf
@@ -2,7 +2,6 @@
   "solution": {
     "path": "BootstrapAdmin.sln",
     "projects": [
-      "src\\blazor\\admin\\BootstrapAdmin.DataAccess.EFCore\\BootstrapAdmin.DataAccess.EFCore.csproj",
       "src\\blazor\\admin\\BootstrapAdmin.DataAccess.Models\\BootstrapAdmin.DataAccess.Models.csproj",
       "src\\blazor\\admin\\BootstrapAdmin.DataAccess.PetaPoco\\BootstrapAdmin.DataAccess.PetaPoco.csproj",
       "src\\blazor\\admin\\BootstrapAdmin.Web.Core\\BootstrapAdmin.Web.Core.csproj",
diff --git a/src/blazor/admin/BootstrapAdmin.DataAccess.PetaPoco/Services/DictService.cs b/src/blazor/admin/BootstrapAdmin.DataAccess.PetaPoco/Services/DictService.cs
index 548bd090..7e07daac 100644
--- a/src/blazor/admin/BootstrapAdmin.DataAccess.PetaPoco/Services/DictService.cs
+++ b/src/blazor/admin/BootstrapAdmin.DataAccess.PetaPoco/Services/DictService.cs
@@ -159,6 +159,13 @@ class DictService : BaseDatabase, IDict
 
     public string? GetNotificationUrl(string appId) => GetUrlByName(appId, "系统通知地址");
 
+    public bool GetEnableDefaultApp()
+    {
+        var dicts = GetAll();
+        var code = dicts.FirstOrDefault(d => d.Category == "网站设置" && d.Name == "默认应用程序")?.Code ?? "0";
+        return code == "1";
+    }
+
     private string? GetUrlByName(string appId, string dictName)
     {
         string? url = null;
@@ -191,9 +198,14 @@ class DictService : BaseDatabase, IDict
         string? url = null;
         var dicts = GetAll();
 
-        // appId 为空时读取前台列表取第一个应用作为默认应用
-        appId ??= GetApps().FirstOrDefault(d => d.Key != AppId).Key ?? AppId;
-        url = dicts.FirstOrDefault(d => d.Category == "应用首页" && d.Name.Equals(appId, StringComparison.OrdinalIgnoreCase) && d.Define == EnumDictDefine.System)?.Code;
+        // 查看是否开启默认应用
+        var enableDefaultApp = GetEnableDefaultApp();
+        if (enableDefaultApp)
+        {
+            // appId 为空时读取前台列表取第一个应用作为默认应用
+            appId ??= GetApps().FirstOrDefault(d => d.Key != AppId).Key ?? AppId;
+            url = dicts.FirstOrDefault(d => d.Category == "应用首页" && d.Name.Equals(appId, StringComparison.OrdinalIgnoreCase) && d.Define == EnumDictDefine.System)?.Code;
+        }
         return url;
     }
 }
diff --git a/src/blazor/admin/BootstrapAdmin.Web.Core/IDict.cs b/src/blazor/admin/BootstrapAdmin.Web.Core/IDict.cs
index e0b20c73..cd7eb6fc 100644
--- a/src/blazor/admin/BootstrapAdmin.Web.Core/IDict.cs
+++ b/src/blazor/admin/BootstrapAdmin.Web.Core/IDict.cs
@@ -149,4 +149,10 @@ public interface IDict
     /// <param name="appId"></param>
     /// <returns></returns>
     string? GetHomeUrlByAppId(string? appId = null);
+
+    /// <summary>
+    /// 是否开启默认应用
+    /// </summary>
+    /// <returns></returns>
+    bool GetEnableDefaultApp();
 }
diff --git a/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.Web.csproj b/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.Web.csproj
index 4fb7a65b..6997d44d 100644
--- a/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.Web.csproj
+++ b/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.Web.csproj
@@ -10,7 +10,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\BootStarpAdmin.DataAccess.FreeSql\BootStarpAdmin.DataAccess.FreeSql.csproj" />
+    <ProjectReference Include="..\BootstrapAdmin.DataAccess.PetaPoco\BootstrapAdmin.DataAccess.PetaPoco.csproj" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.db b/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.db
index 5708b5a6..661b75a4 100644
Binary files a/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.db and b/src/blazor/admin/BootstrapAdmin.Web/BootstrapAdmin.db differ
diff --git a/src/blazor/admin/BootstrapAdmin.Web/Extensions/ServiceCollectionExtensions.cs b/src/blazor/admin/BootstrapAdmin.Web/Extensions/ServiceCollectionExtensions.cs
index 4e0f4bd6..9f817f49 100644
--- a/src/blazor/admin/BootstrapAdmin.Web/Extensions/ServiceCollectionExtensions.cs
+++ b/src/blazor/admin/BootstrapAdmin.Web/Extensions/ServiceCollectionExtensions.cs
@@ -4,6 +4,8 @@ using BootstrapAdmin.Web.Services;
 using BootstrapAdmin.Web.Services.SMS;
 using BootstrapAdmin.Web.Services.SMS.Tencent;
 using BootstrapAdmin.Web.Utils;
+using PetaPoco;
+using PetaPoco.Providers;
 
 namespace Microsoft.Extensions.DependencyInjection
 {
@@ -22,6 +24,10 @@ namespace Microsoft.Extensions.DependencyInjection
             services.AddCors();
             services.AddResponseCompression();
 
+            // 增加后台任务
+            services.AddTaskServices();
+            services.AddHostedService<AdminTaskService>();
+
             // 增加 缓存管理服务
             services.AddCacheManager();
 
@@ -48,30 +54,27 @@ namespace Microsoft.Extensions.DependencyInjection
             //    option.UseSqlite(connString);
             //});
 
-            // 增加 PetaPoco 数据服务
-            //services.AddPetaPocoDataAccessServices((provider, builder) =>
-            //{
-            //    var configuration = provider.GetRequiredService<IConfiguration>();
-            //    var connString = configuration.GetConnectionString("bb");
-            //    builder.UsingProvider<SQLiteDatabaseProvider>()
-            //           .UsingConnectionString(connString);
-            //});
+            // 增加 FreeSql 数据服务
+            //            services.AddFreeSql((provider, builder) =>
+            //            {
+            //                var configuration = provider.GetRequiredService<IConfiguration>();
+            //                var connString = configuration.GetConnectionString("bb");
+            //                builder.UseConnectionString(FreeSql.DataType.Sqlite, connString);
+            //#if DEBUG
+            //                //调试sql语句输出
+            //                builder.UseMonitorCommand(cmd => System.Console.WriteLine(cmd.CommandText));
+            //#endif
+            //            });
 
-            services.AddFreeSql((provider, builder) =>
+            // 增加 PetaPoco 数据服务
+            services.AddPetaPocoDataAccessServices((provider, builder) =>
             {
                 var configuration = provider.GetRequiredService<IConfiguration>();
                 var connString = configuration.GetConnectionString("bb");
-                builder.UseConnectionString(FreeSql.DataType.Sqlite, connString);
-#if DEBUG
-                //调试sql语句输出
-                builder.UseMonitorCommand(cmd => System.Console.WriteLine(cmd.CommandText));
-#endif
+                builder.UsingProvider<SQLiteDatabaseProvider>()
+                       .UsingConnectionString(connString);
             });
 
-            // 增加后台任务
-            services.AddTaskServices();
-            services.AddHostedService<AdminTaskService>();
-
             return services;
         }
     }
diff --git a/src/blazor/client/BootstrapClient.Web/Extensions/ServicesExtensions.cs b/src/blazor/client/BootstrapClient.Web/Extensions/ServiceCollectionExtensions.cs
similarity index 95%
rename from src/blazor/client/BootstrapClient.Web/Extensions/ServicesExtensions.cs
rename to src/blazor/client/BootstrapClient.Web/Extensions/ServiceCollectionExtensions.cs
index 62db1765..f7caad32 100644
--- a/src/blazor/client/BootstrapClient.Web/Extensions/ServicesExtensions.cs
+++ b/src/blazor/client/BootstrapClient.Web/Extensions/ServiceCollectionExtensions.cs
@@ -7,7 +7,7 @@ namespace Microsoft.Extensions.DependencyInjection
     /// <summary>
     /// 
     /// </summary>
-    public static class ServicesExtensions
+    public static class ServiceCollectionExtensions
     {
         /// <summary>
         /// 添加示例后台任务