Silverlight 5 WCF RIA Services: Part 3

Now we are going to create a app where we would insert data to the database.

I will take up the same project again and add a new page to it.





I create a Data Model now as shown below:



Give it a Build now . Create a new Domain Service class as shown below:





namespace SL2wayWCFRia.Web
{
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.Data;
using System.Linq;
using System.ServiceModel.DomainServices.EntityFramework;
using System.ServiceModel.DomainServices.Hosting;
using System.ServiceModel.DomainServices.Server;

// Implements application logic using the PublishingCompanyEntities context.
// TODO: Add your application logic to these methods or in additional methods.
// TODO: Wire up authentication (Windows/ASP.NET Forms) and uncomment the following to disable anonymous access
// Also consider adding roles to restrict access as appropriate.
// [RequiresAuthentication]
[EnableClientAccess()]
public class DataDomainService : LinqToEntitiesDomainService<PublishingCompanyEntities>
{

// TODO:
// Consider constraining the results of your query method. If you need additional input you can
// add parameters to this method or create additional query methods with different names.
// To support paging you will need to add ordering to the 'Articles' query.
public IQueryable<Article> GetArticles()
{
return this.ObjectContext.Articles;
}

public void InsertArticle(Article article)
{
if ((article.EntityState != EntityState.Detached))
{
this.ObjectContext.ObjectStateManager.ChangeObjectState(article, EntityState.Added);
}
else
{
this.ObjectContext.Articles.AddObject(article);
}
}

public void UpdateArticle(Article currentArticle)
{
this.ObjectContext.Articles.AttachAsModified(currentArticle, this.ChangeSet.GetOriginal(currentArticle));
}