Umbraco中的RelatedLink的使用

Umbraco中经常需要使用到RelatedLink, 那么在代码中我们如何来获取RelatedLink呢，

可能在Backoffice中我们有一个RelatedLink, 上面有3个链接，如下所示:

我们在项目开发过程中，有两种方式来处理它们

方式1 ：  采用 JArray  (引用命名空间  Newtonsoft.Json.Linq)

using Newtonsoft.Json.Linq;

public static class Helper
{
    public static List<RelatedLink> GetRelatedLinks(IPublishedContent contentItem, string propertyAlias)
   {
      List<RelatedLink> relatedLinksList = null;

       UmbracoHelper uHelper = new UmbracoHelper(UmbracoContext.Current);
            IPublishedProperty relatedLinkProperty = contentItem.GetProperty(propertyAlias);

            if (relatedLinkProperty != null && relatedLinkProperty.HasValue && relatedLinkProperty.Value.ToString().Length > )
            {
                relatedLinksList = new List<RelatedLink>();
                JArray relatedLinks = (JArray)relatedLinkProperty.Value;

                foreach (JObject linkItem in relatedLinks)
                {
                    string linkUrl = (linkItem.Value<bool>("isInternal")) ? uHelper.NiceUrl(linkItem.Value<int>("internal")) : linkItem.Value<string>("link");
                    bool newWindow = linkItem.Value<bool>("newWindow");
                    string linkText = linkItem.Value<string>("caption");
                    relatedLinksList.Add(new RelatedLink(linkText, linkUrl, newWindow));
                }
            }

            return relatedLinksList;

   }

}

方式2:  直接使用RelatedLinks的属性

在后端，我们把空的链接删除，写了一个静态的扩展方法

public static IEnumerable<RelatedLink> FilterEmptyLinks(this RelatedLinks links)
{
      var filtered = links?.Where(l => !string.IsNullOrWhiteSpace(l.Link) && l.Link != "#");

      return filtered ?? Enumerable.Empty<RelatedLink>();

}

在前端cshtml页面的razor文件中，如下操作

@foreach(var link in Model.Content.LoginLinks.FilterEmptyLinks())
{
     <li>
      <a href="@(link.Link)" target="@(link.NewWindow ? "_blank" : null)">@link.Caption</a>
     </li>

}

方法3 在一个项目中，我们写了一个RelatedLinkModel, 然后又在helper.cs中写了一个GetsRelatedLinks方法来获取, 但这个好像只是适合Umbraco 7.6的 (Obsolete)Related links

using Newtonsoft.Json;
using MyProject.Models

public class RelatedLinkModel
{

     [JsonProperty(PropertyName = "link")]
     public string Url {get; set;}   

     [JsonProperty(PropertyName = "caption")]
     public string Caption {get; set;}

     [JsonProperty(PropertyName = "title")]
     public string Title {get; set;}

     [JsonProperty(PropertyName = "newWindow")]
     public bool IsNewWindow {get; set;}

     [JsonProperty(PropertyName = "internal")]
     public int? InternalId {get; set;}

     public string LinkUrl {get; set;}

}

然后，在Helper.cs中有一个方法 GetsRelatedLinks

using Newtonsoft.Json
using MyProject.Models

public static List<RelatedLinkModel> GetsRelatedLinks(this IPublishedContent content, string propertyAlias)
{

     if(content == null)
       return new List<RelatedLinkModel>();

   if(content.HasValue(propertyAlias) && ((string)content.GetProperty(propertyAlias).DataValue).Length > )
{
   var json = ((string)content.GetProperty(propertyAlias).DataValue);
   List<RelatedLinkModel>  relatedLinks = JsonConvert.DeserializeObject<List<RelatedLinkModel>>(json);
  foreach(RelatedLinkModel current in relatedLinks)
  {
     if(current.InternalId.HasValue)
    {
         var contentU = new UmbracoHelper(ContextHelpers.EnsureUmbracoContext()).TypedContent(current.InternalId.Value);
        if(contentU != null)
        {
            current.LinkUrl = contentU.Url;
        }
        else
        {
            current.LinkUrl = "";
        }

    }
else if (!string.IsNullOrEmpty(current.Url))
{
     current.LinkUrl = current.Url;
} 

  }
return relatedLinks;
}
return null;
}