Create Retrieve Update and Delete using oData (Rest endpoint) in Silverlight (CRM 2011)

Hi,

Sharing a basic example that performs CRUD operation using Rest endpoint in Silverlight.

namespace odataSilverlight
{
 public partial class MainPage : UserControl
 {
 public MainPage()
 {
 InitializeComponent();
 }

GGContext context;
 private void UserControl_Loaded(object sender, RoutedEventArgs e)
 {
 var orgServiceUrl = "http://r78-7-amscrm/GG/XRMServices/2011/OrganizationData.svc";

 // initialize the context
 context = new GGContext(new Uri(orgServiceUrl));

// using client http stack
 context.HttpStack = System.Data.Services.Client.HttpStack.ClientHttp;
 context.UseDefaultCredentials = false;
 context.Credentials = new NetworkCredential("administrator", "Secure*8", "AMS");
 // create contact record
 Contact contact = new Contact();
 contact.LastName = "Rana";
 contact.FirstName = "Akshaj";

// add the new contact to the contact set
 context.AddToContactSet(contact);
 // call BeginSaveChanges method and specify the callback method and the contact object
 context.BeginSaveChanges(CreateContactHandler, contact);

}
 private void CreateContactHandler(IAsyncResult result)
 {
 // in the call back method call the EndSaveChanges method
 // it returns DataServiceResponse object.
 // we can get the error information from this object in case an operation fails
 context.EndSaveChanges(result);
 // id of the created contact record
 Guid createdContactGuid = ((Contact)result.AsyncState).ContactId;

// Retrieve the created contact record
 DataServiceQuery<Contact> queryContact = (DataServiceQuery<Contact>)
 context.ContactSet.
 AddQueryOption("$filter", "ContactId eq guid'" + createdContactGuid + "'");
 queryContact.BeginExecute(RetrieveContactHandler, queryContact);

}

private void RetrieveContactHandler(IAsyncResult result)
 {
 DataServiceQuery<Contact> contacts = result.AsyncState as DataServiceQuery<Contact>;
 Contact retrievedContact = new DataServiceCollection<Contact>(contacts.EndExecute(result)).First<Contact>();

// Update the retrieved contact record's first name
 retrievedContact.FirstName = "Mickey";

context.UpdateObject(retrievedContact);
 context.BeginSaveChanges(UpdateContactHandler, retrievedContact);

}

private void UpdateContactHandler(IAsyncResult result)
 {
 context.EndSaveChanges(result);
 Contact contact = (Contact)result.AsyncState;

// Delete the updated contact record
 context.DeleteObject(contact);
 context.BeginSaveChanges(DeleteContactHandler, contact);
 }
 private void DeleteContactHandler(IAsyncResult result)
 {
 context.EndSaveChanges(result);
 }
 }
}

Hope it helps