Add PageContent layout hook.

Resolve #4008

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/Themes/Basic/Layouts/Account.cshtml

@@ -86,7 +86,9 @@
                     </div>
                 }
                 @(await Component.InvokeAsync<PageAlertsViewComponent>())
+                @await Component.InvokeLayoutHookAsync(LayoutHooks.PageContent.First, StandardLayouts.Account)
                 @RenderBody()
+                @await Component.InvokeLayoutHookAsync(LayoutHooks.PageContent.Last, StandardLayouts.Account)
             </abp-column>
         </abp-row>
     </div>
@@ -102,4 +104,4 @@
 
     @await Component.InvokeLayoutHookAsync(LayoutHooks.Body.Last, StandardLayouts.Account)
 </body>
-</html>
+</html>

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/Themes/Basic/Layouts/Application.cshtml

@@ -64,7 +64,9 @@
                 @RenderSection("content_toolbar", false)
             </div>
         </div>
+        @await Component.InvokeLayoutHookAsync(LayoutHooks.PageContent.First, StandardLayouts.Application)
         @RenderBody()
+        @await Component.InvokeLayoutHookAsync(LayoutHooks.PageContent.Last, StandardLayouts.Application)
     </div>
 
     <abp-script-bundle name="@BasicThemeBundles.Scripts.Global" />
@@ -78,4 +80,4 @@
 
     @await Component.InvokeLayoutHookAsync(LayoutHooks.Body.Last, StandardLayouts.Application)
 </body>
-</html>
+</html>

framework/src/Volo.Abp.AspNetCore.Mvc.UI.Theme.Basic/Themes/Basic/Layouts/Empty.cshtml

@@ -59,7 +59,9 @@
 
     <div class="@containerClass">
         @(await Component.InvokeAsync<PageAlertsViewComponent>())
+        @await Component.InvokeLayoutHookAsync(LayoutHooks.PageContent.First, StandardLayouts.Empty)
         @RenderBody()
+        @await Component.InvokeLayoutHookAsync(LayoutHooks.PageContent.Last, StandardLayouts.Empty)
     </div>
 
     <abp-script-bundle name="@BasicThemeBundles.Scripts.Global" />
@@ -73,4 +75,4 @@
 
     @await Component.InvokeLayoutHookAsync(LayoutHooks.Body.Last, StandardLayouts.Empty)
 </body>
-</html>
+</html>

framework/src/Volo.Abp.AspNetCore.Mvc.UI/Volo/Abp/AspNetCore/Mvc/UI/Components/LayoutHook/LayoutHooks.cs

@@ -13,5 +13,11 @@
             public const string First = "Body.First";
             public const string Last = "Body.Last";
         }
+
+        public static class PageContent
+        {
+            public const string First = "PageContent.First";
+            public const string Last = "PageContent.Last";
+        }
     }
 }