Hi All,

I need to search all users by display name for partial matches, I can't find anyway to do this with the API... At the moment, in development, I'm just doing it as follows but I'm sure this is going to be very performance heavy. Does anybody have any suggestions?

Public Shared Function SearchUsers(ByVal strSearch As String, Optional Limit As Integer = 10) As IList(Of Users.UserInfo)
Return (From u As DotNetNuke.Entities.Users.UserInfo In DotNetNuke.Entities.Users.UserController.GetUsers(0) Where u.DisplayName.ToLower Like "*" & strSearch.ToLower & "*" Take Limit).ToList
End Function

Yes, don't do it in your code like that as it won't scale.

Unfortunately in the UserController there isn't an exposed method to do this (even though the capability is there in the internal implementation). 

Fortunately, you can call the MembershipProvider directly to do this:

List<UserInfo> objUsers = (List<UserInfo>) MembershipProvider.Instance().GetUsersBasicSearch(PortalId, 0, 100, "DisplayName", true, "DisplayName", "my-search-term-goes-here");

This will return the top 100 people sorted ascending by DisplayName and matching anything that you put in the parameter "my-search-term-goes-here". 

Hope this helps!