Episerver：获取链接的属性以生成绝对网址

问题描述

我有一个现有的块类型，它具有指向内部页面的类型PageReference的属性。

要求是将现有属性替换为可以指向内部或外部内容的Url属性。

为此，我创建了一个计划作业，以迁移生产环境中现有块的属性值。

我能够获取块类型的实例。我需要将新添加的Url属性的值设置为旧PageReference属性所引用的页面。

//implementation
var contentTypeRepository = ServiceLocator.Current.GetInstance<EPiServer.DataAbstraction.IContentTypeRepository>();
var contentModelUsage = ServiceLocator.Current.GetInstance<IContentModelUsage>();
var repository = ServiceLocator.Current.GetInstance<IContentRepository>();

//Teaser Item Block
var blockItem = contentTypeRepository.Load(typeof(TeaserItemBlock));

// get usages,also includes versions
IList<ContentUsage> usages = contentModelUsage.ListContentOfContentType(blockItem);

现在，我要遍历块实例并设置Url属性。

解决方法

如果您的旧属性是PageReference属性，则应该能够将其转换为永久链接，并将其分配给新的Url属性（将字符串隐式转换为Url受支持）。

类似以下内容：

YourContent.NewUrlProperty = 
    ServiceLocator.Current.GetInstance<IPermanentLinkMapper>()               
    .Find(YourContent.OldPageReferenceProperty)
    .PermanentLinkUrl

,

        //implementation
        var contentTypeRepository = ServiceLocator.Current.GetInstance<EPiServer.DataAbstraction.IContentTypeRepository>();
        var contentModelUsage = ServiceLocator.Current.GetInstance<IContentModelUsage>();
        var repository = ServiceLocator.Current.GetInstance<IContentRepository>();

        //Teaser Item Block
        var blockItem = contentTypeRepository.Load(typeof(TeaserItemBlock));

        // get usages,also includes versions
        IList<ContentUsage> usages = contentModelUsage.ListContentOfContentType(blockItem);


        foreach (var block in usages.Select(contentUsage => contentUsage.ContentLink.ToReferenceWithoutVersion()).Distinct().Select(contentReference => repository.Get<TeaserItemBlock>  (contentReference)))
        {

            if (!string.IsNullOrEmpty(block.GetPropertyValue("Link")))//This is the Page reference property name
            {
                    var writableCloneBlockItem = (TeaserItemBlock)block.CreateWritableClone();

                    // Creating a page reference by the page id
                    PageReference pageReference = new PageReference(block.Link);
                    
                    // Creating instance for "ContentLoader" class by ServiceLocator - dependency injection
                    IContentLoader contentLoader = ServiceLocator.Current.GetInstance<IContentLoader>();

                    // Getting the actual requested page
                    PageData requstedPage = contentLoader.Get<PageData>(pageReference);
                                        
                    writableCloneBlockItem.Url = requstedPage.LinkURL;
                    writableCloneBlockItem.Property["Link"].Value = null;
                    repository.Save((IContent)writableCloneBlockItem,EPiServer.DataAccess.SaveAction.Publish,EPiServer.Security.AccessLevel.Read);
            }
        }