Adds the specified user names to each of the specified roles.
Assembly: System.Web (in System.Web.dll)
abstract AddUsersToRoles : usernames:string * roleNames:string -> unit override AddUsersToRoles : usernames:string * roleNames:string -> unit
One of the roles in roleNames is a null reference (Nothing in Visual Basic).
One of the users in usernames is a null reference (Nothing in Visual Basic).
One of the roles in roleNames is an empty string or contains a comma.
One of the users in usernames is an empty string or contains a comma.
One of the roles in roleNames is longer than 256 characters.
One of the users in usernames is longer than 256 characters.
roleNames contains a duplicate element.
usernames contains a duplicate element.
One or more of the specified role names was not found.
One or more of the specified user names was not found.
One or more of the specified user names is already associated with one or more of the specified role names.
An unknown error occurred while communicating with the database.
The method is called by the Roles class to associate one or more users with one or more roles in the SQL Server database specified in the ASP.NET application's configuration file (Web.config). This method is called by the AddUserToRole, AddUserToRoles, AddUsersToRole, and AddUsersToRoles methods of the Roles class.
The database updates that are performed during the call to the method are made within a transaction. If an error is encountered, such as a user name that is already in a specified role, the transaction is rolled back and no updates are performed.
User names and role names cannot contain commas.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.