增加功能：增加404错误处理

Bootstrap.Admin/Bootstrap.Admin.csproj

@@ -9,6 +9,7 @@
     <PackageReference Include="Bootstrap.Security.Mvc" Version="1.0.0" />
     <PackageReference Include="Longbow.Web" Version="1.0.1" />
     <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.8" />
+    <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.0.3" />
   </ItemGroup>
 
   <ItemGroup>

Bootstrap.Admin/Controllers/HomeController.cs

@@ -22,11 +22,12 @@ namespace Bootstrap.Admin.Controllers
         /// <summary>
         /// 
         /// </summary>
+        /// <param name="id"></param>
         /// <returns></returns>
         [AllowAnonymous]
-        public ActionResult Error()
+        public IActionResult Error(int id)
         {
-            return View();
+            return id == 404 ? View("NotFound") : View();
         }
     }
 }

Bootstrap.Admin/Startup.cs

@@ -62,6 +62,7 @@ namespace Bootstrap.Admin
             {
                 app.UseExceptionHandler("/Home/Error");
             }
+            app.UseStatusCodePagesWithReExecute("/Home/Error/{0}");
             app.UseCors(builder => builder.WithOrigins(Configuration["AllowOrigins"].Split(',', StringSplitOptions.RemoveEmptyEntries)).AllowAnyHeader().AllowAnyMethod().AllowCredentials());
             app.UseStaticFiles();
             app.UseAuthentication();

Bootstrap.Admin/Views/Home/NotFound.cshtml

@@ -0,0 +1,17 @@
+@{
+    ViewBag.Title = "资源未找到";
+    Layout = "~/Views/Shared/_Root.cshtml";
+}
+@section css {
+    <link href="~/css/error.css" rel="stylesheet" />
+}
+@section Javascript {
+    <script src="~/js/error.js"></script>
+}
+<section class="error-wrapper">
+    <img src="~/images/404_icon.png" />
+    <h1>请求资源未找到</h1>
+    <h3>相关错误信息已经记录到日志中，请登录服务器查看</h3>
+    <br />
+    <a href="~/Home/Index" target="_top">返回首页</a>
+</section>