XperienceCommunity.PageLinkTagHelpers 1.0.0-prerelease-4-1

Xperience Page Link Tag Helpers

Kentico Xperience 13.0 ASP.NET Core Tag Helpers that generates links to pages from NodeGUID values

Dependencies

This package is compatible with ASP.NET Core 3.1+ applications or libraries integrated with Kentico Xperience 13.0.

How to Use?

1. Install the NuGet package in your ASP.NET Core project (or class library)

   dotnet add package XperienceCommunity.PageLinkTagHelpers
   

2. Add the correct @addTagHelper directive to your _ViewImports.cshtml file:

   @addTagHelper *, XperienceCommunity.PageLinkTagHelpers

3. Create an implementation of ILinkablePage:

   public class LinkablePage : ILinkablePage
   {
       public static LinkablePage Home { get; } = new LinkablePage(new Guid("..."));
       public static LinkablePage Store { get; } = new LinkablePage(new Guid("..."));
       public static LinkablePage ContactUs { get; } = new LinkablePage(new Guid("..."));
       public static LinkablePage TermsOfUse { get; } = new LinkablePage(new Guid("..."));
   
       public Guid NodeGUID { get; }
   
       protected LinkablePage(Guid nodeGUID) => NodeGUID = nodeGUID;
   
       public static IReadOnlyList<LinkablePage> All { get; } = new List<LinkablePage>
       {
           Home,
           Store,
           ContactUs,
           TermsOfUse
       };
   }
   

4. Register the library with ASP.NET Core DI:

   public void ConfigureServices(IServiceCollection services)
   {
       // Use default implementations
       services.AddXperienceCommunityPageLinks();
   
       // or use a custom implementation
       services.AddXperienceCommunityPageLinks<MyCustomLinkablePageLinkRetriever>();
   }
   

5. (optional) Add your LinkablePage class's namespace to your _ViewImports.cshtml file.

6. Use the xp-page-link tag helper on an <a> element in a Razor View:

   <a href="" xp-page-link="LinkablePage.Home">
     <img
       src="/getmedia/10d5e094-d9aa-4edf-940d-098ca69b5f77/logo.png"
       alt="..."
     />
   </a>
   

7. (recommended) Create a global event handler to protect the Pages referenced by your ILinkablePage implementation:

   using System;
   using System.Linq;
   using CMS;
   using CMS.Core;
   using CMS.DataEngine;
   using CMS.DocumentEngine;
   
   [assembly: RegisterModule(typeof(LinkablePageProtectionModule))]
   
   namespace Sandbox
   {
       /// <summary>
       /// Protects <see cref="LinkablePage"/> instances that represent Pages in the content tree with hard coded <see cref="TreeNode.NodeGUID"/> values.
       /// </summary>
       public class LinkablePageProtectionModule : Module
       {
           public LinkablePageProtectionModule() : base(nameof(LinkablePageProtectionModule)) { }
   
           protected override void OnInit()
           {
               base.OnInit();
   
               DocumentEvents.Delete.Before += Delete_Before;
           }
   
           private void Delete_Before(object sender, DocumentEventArgs e)
           {
               if (LinkablePage.All.Any(p => p.NodeGuid == e.Node.NodeGUID))
               {
                   e.Cancel();
   
                   var log = Service.Resolve<IEventLogService>();
   
                   log.LogError(
                       nameof(LinkablePageProtectionModule),
                       "DELETE_PAGE",
                       $"Cannot delete Linkable Page [{e.Node.NodeAliasPath}], as it might be in use. Please first remove the Linkable Page in the application code and re-deploy the application.");
               }
           }
       }
   }
   

Usage

<a
  href=""
  xp-page-link="LinkablePage.ContactUs"
  xp-page-link-text="Contact us for help!"
  xp-page-link-query-params='new NameValueCollection { { "a": "b" } }'
></a>

This will generate the following HTML:

<a href="/contact-us?a=b">Contact us for help!</a>

References

.NET

• ASP.NET Core Tag Helper

Kentico Xperience

• Retrieving Pages
• Displaying Page URLs
• Document Events