In the last postI introduced the Silverlight Object Model, which helps to access the SharePoint objects directly from Silverlight. In this I am posting about how to access SharePoint List Items using Silverlight Object Model. In this I am using Caml query object, which is used to get the Fields.

private Web oWebSite = null;
private List oList = null;
private ListItemCollection oListItems = null;
private ClientContext clientContext = null;

this.clientContext = ClientContext.Current;
if (this.clientContext == null)
{
this.clientContext = new ClientContext(url);
}
using (this.clientContext)
{
this.oWebSite = clientContext.Web;
this.oList = this.oWebSite.Lists.GetByTitle(this.listName);
this.oListItems = this.oList.GetItems(CamlQuery.CreateAllItemsQuery());
    clientContext.Load(this.oListItems);
clientContext.ExecuteQueryAsync(onQuerySucceeded, onQueryFailed);
}

private void onQuerySucceeded(object sender, ClientRequestSucceededEventArgs args)
{
//FillItems method converts the List items to Class Properties
//and binds them to the Silverlight User Interface.
this.Dispatcher.BeginInvoke(new Action(FillItems));
}

private void onQueryFailed(object sender, ClientRequestFailedEventArgs args)
{
MessageBox.Show("An error occured.\n" + args.Message + "\n" + args.StackTrace);
}

And if you don’t want all the columns or you want to specify the columns you want to access you can use Caml Query object’s ViewXml property.

CamlQuery camlQuery = new CamlQuery();
string query = "<OrderBy><FieldRef Name='Name' Ascending='False' /></OrderBy>";
camlQuery.ViewXml = query;
this.oListItems = this.oList.GetItems(camlQuery);

You can access CustomLists and Document Libraries by this method.