Blog: Make content required

resolves https://github.com/abpframework/abp/issues/9256

modules/blogging/src/Volo.Blogging.Web/Pages/Blogs/Posts/Edit.cshtml.cs

@@ -97,6 +97,7 @@ namespace Volo.Blogging.Pages.Blog.Posts
         [DynamicStringLength(typeof(PostConsts), nameof(PostConsts.MaxUrlLength))]
         public string Url { get; set; }
 
+        [Required]
         [HiddenInput]
         [DynamicStringLength(typeof(PostConsts), nameof(PostConsts.MaxContentLength))]
         public string Content { get; set; }
@@ -106,4 +107,4 @@ namespace Volo.Blogging.Pages.Blog.Posts
 
         public string Tags { get; set; }
     }
-}
+}

modules/blogging/src/Volo.Blogging.Web/Pages/Blogs/Posts/New.cshtml.cs

@@ -91,6 +91,7 @@ namespace Volo.Blogging.Pages.Blog.Posts
             [DynamicStringLength(typeof(PostConsts), nameof(PostConsts.MaxUrlLength))]
             public string Url { get; set; }
 
+            [Required]
             [HiddenInput]
             [DynamicStringLength(typeof(PostConsts), nameof(PostConsts.MaxContentLength))]
             public string Content { get; set; }
@@ -102,4 +103,4 @@ namespace Volo.Blogging.Pages.Blog.Posts
 
         }
     }
-}
+}