Example: Create item relations

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using Telerik.Sitefinity;
using Telerik.Sitefinity.Data;
using Telerik.Sitefinity.DynamicModules;
using Telerik.Sitefinity.DynamicModules.Model;
using Telerik.Sitefinity.GenericContent.Model;
using Telerik.Sitefinity.Modules.News;
using Telerik.Sitefinity.Utilities.TypeConverters;
using Telerik.Sitefinity.Versioning;
using Telerik.Sitefinity.Model;
using Telerik.Sitefinity.Security;
using Telerik.Sitefinity.News.Model;
using Telerik.Sitefinity.Workflow;
using System.Text.RegularExpressions;
using Telerik.Sitefinity.RelatedData;

namespace SitefinityWebApp
{
   public class CreateRelatedDataItemRelation
   {
       public void CreateItemRelation()
       {
           NewsManager newsManager = NewsManager.GetManager();
           //create some sample items first, to eb able to relate them through code later
           var speaker = this.CreateSpeaker();
           var newsItem = this.CreateNewsItem(newsManager, Guid.NewGuid(), "MyNewsItem1", "SampleNewsContent");

           // create a relation between the news item and the speaker item. The news item should have a relatedData field of type DynamicContent (pointing to the Speakers module) called "speakers"
           // the relation will be available only for the current item state (Master)
           newsItem.CreateRelation(speaker, "speakers");
           newsManager.SaveChanges();

           // on publish, all item's relations are copied from Master to Live state.
           newsManager.Lifecycle.Publish(newsItem);
           newsManager.SaveChanges();
       }

       public DynamicContent CreateSpeaker()
       {
           // Set the provider name for the DynamicModuleManager here. All available providers are listed in
           // Administration -> Settings -> Advanced -> DynamicModules -> Providers
           var providerName = String.Empty;
           // Set a transaction name and get the version manager
           var transactionName = "someTransactionName";
           var versionManager = VersionManager.GetManager(null, transactionName);
           DynamicModuleManager dynamicModuleManager = DynamicModuleManager.GetManager(providerName, transactionName);
           Type speakerType = TypeResolutionService.ResolveType("Telerik.Sitefinity.DynamicTypes.Model.Speakers.Speaker");
           DynamicContent speakerItem = dynamicModuleManager.CreateDataItem(speakerType);
           // This is how values for the properties are set
           speakerItem.SetValue("Title", "Some Title");
           speakerItem.SetString("UrlName", "SomeUrlName");
           speakerItem.SetValue("Owner", SecurityManager.GetCurrentUserId());
           speakerItem.SetValue("PublicationDate", DateTime.UtcNow);
           speakerItem.SetWorkflowStatus(dynamicModuleManager.Provider.ApplicationName, "Draft");
           // Create a version and commit the transaction in order changes to be persisted to data store
           versionManager.CreateVersion(speakerItem, false);
           TransactionManager.CommitTransaction(transactionName);
           return speakerItem;
       }

       public NewsItem CreateNewsItem(NewsManager newsManager, Guid masterNewsId, string newsTitle, string newsContent)
       {
           //The news item is created as a master. The newsId is assigned to the master.
           var newsItem = newsManager.CreateNewsItem(masterNewsId);
           //Set the properties of the news item.
           newsItem.Title = newsTitle;
           newsItem.Content = newsContent;
           newsItem.DateCreated = DateTime.UtcNow;
           newsItem.PublicationDate = DateTime.UtcNow;
           newsItem.LastModified = DateTime.UtcNow;
           newsItem.UrlName = Regex.Replace(newsTitle.ToLower(), @"[^\w\-\!\$\'\(\)\=\@\d_]+", "-");
           //Recompiles and validates the url of the news item.
           newsManager.RecompileAndValidateUrls(newsItem);
           //Save the changes.
           newsManager.SaveChanges();
           //Publish the news item. The published version acquires new ID.
           var bag = new Dictionary<string, string>();
           bag.Add("ContentType", typeof(NewsItem).FullName);
           WorkflowManager.MessageWorkflow(masterNewsId, typeof(NewsItem), null, "Publish", false, bag);
           return newsItem;
       }
   }
}