将用户数据与SID而不是用户名匹配？

Question

All the examples I can find for storing/filtering data in Lightswitch end up comparing usernames directly, for example:

partial void OrdersForUser_PreprocessQuery(ref IQueryable query)
{
    // Only show the Orders for the current user
    query = query.Where(x => x.UserName == this.Application.User.Identity.Name);
}

This seems like a bad idea to me as usernames can (and do) change.

Is the ASP.NET Membership UserID (a guid) or SID available somewhere to match on?

Answer 1

To get the Membership UserID from the username, you can use:

MembershipUser CurrentUser = Membership.GetUser(this.Application.User.Identity.Name);
Guid userGuid = (Guid)CurrentUser.ProviderUserKey;