Using ASP.net membership to get aspnet_Users in silverlight - asp.net

Question

Hope somebody can help.
Have looked around on the net but cannot seem to solve (or understand) this.
I have tried the code posted at
http://blogs.msdn.com/b/kylemc/archive/2010/05/10/using-asp-net-membership-in-silverlight.aspx
(not going to repeat the class MembershipServiceUser here as it is quite long and can be seen on the mentioned page)
I have set up the domain service with the class and the code to return the users:
//[RequiresRole("Managers")]
public IEnumerable<MembershipServiceUser> GetAllUsers()
{
return Membership.GetAllUsers().Cast<MembershipUser>().Select(u => new MembershipServiceUser(u));
}
I took out the RequiresRole for testing.
What I seem to be a bit blonde about is the calling of the GetAllUsers() method.
In my code behind I am using:
MembershipDataContext context = new MembershipDataContext();
EntityQuery<MembershipServiceUser> users = context.GetAllUsersQuery();
I am not 100% sure if this is the correct way to use the method or if something else is wrong because
context.GetAllUsersQuery(); returns "Enumeration yielded no results"
One question is also in the code kylmc uses //RequiresRole("Admin")]. Is this a custom role created in the ASP.NET Configuration editor?
Looking at another tutorial regarding using the ASP.NET authentication service in Silverlight, I create a role called "Managers" and added the login user to that role.
Logging in using a user with role Managers doesn't help and results are still not yielded.
Any ideas I could possible look at?
Many thanks
Neill

Answer 1

There are two steps involved with querying.
Get a query object from the Domain Service context (synchronous).
Load the query from the Domain Service context (asynchronous).
Example:
public void Load()
{
// define the query
var query = context.GetAllUsersQuery();
// start running the query, and when the results return call
// OnGetAllUsersLoaded
context.Load(query, OnGetAllUsersLoaded, null);
}
public void OnGetAllUsersLoaded(LoadOperation op)
{
var results = op.Entities;
}