RoleProvider.GetRolesForUser Method (String)
Gets a list of the roles that a specified user is in for the configured applicationName.
Assembly: System.Web.ApplicationServices (in System.Web.ApplicationServices.dll)
Parameters
- username
-
Type:
System.String
The user to return a list of roles for.
Return Value
Type: System.String()A string array containing the names of all the roles that the specified user is in for the configured applicationName.
GetRolesForUser is called by the GetRolesForUser method of the Roles class to retrieve the role names that the specified user is associated with from the data source. Only the roles for the configured ApplicationName are retrieved.
If no roles exist for the specified user for the configured applicationName, we recommend that your provider return a string array with no elements.
If the specified user name is null or is an empty string, we recommend that your provider throw an exception.
The following code example shows a sample implementation of the GetRolesForUser method.
Public Overrides Function GetRolesForUser(ByVal username As String) As String() If username Is Nothing OrElse username = "" Then _ Throw New ProviderException("User name cannot be empty or null.") Dim tmpRoleNames As String = "" Dim conn As OdbcConnection = New OdbcConnection(connectionString) Dim cmd As OdbcCommand = New OdbcCommand("SELECT Rolename FROM UsersInRoles " & _ " WHERE Username = ? AND ApplicationName = ?", conn) cmd.Parameters.Add("@Username", OdbcType.VarChar, 255).Value = username cmd.Parameters.Add("@ApplicationName", OdbcType.VarChar, 255).Value = ApplicationName Dim reader As OdbcDataReader = Nothing Try conn.Open() reader = cmd.ExecuteReader() Do While reader.Read() tmpRoleNames &= reader.GetString(0) & "," Loop Catch e As OdbcException ' Handle exception. Finally If Not reader Is Nothing Then reader.Close() conn.Close() End Try If tmpRoleNames.Length > 0 Then ' Remove trailing comma. tmpRoleNames = tmpRoleNames.Substring(0, tmpRoleNames.Length - 1) Return tmpRoleNames.Split(CChar(",")) End If Return New String() {} End Function
Available since 2.0