<script type="text/javascript">
    var makeEnabled = true;
    var validatorControl = document.getElementById('<%= RequiredFieldValidator1.ClientID %>');
    ValidatorEnable(validatorControl, makeEnabled);
</script>

Public Class ICalController
        Inherits Controller
 
        Private _sessionRepo As ISessionRepository
        Private _locationRepo As ILocationRepository
 
        Public Sub New(ByVal sessionRepo As ISessionRepository, _
                             ByVal locationRepo As ILocationRepository)
            _sessionRepo = sessionRepo
            _locationRepo = locationRepo
        End Sub
 
        Public Function SessionEvent(ByVal sessionID As Long) As ActionResult
            Dim s As SessionsEntity = _sessionRepo.GetSession(sessionID)
            Dim loc As LocationsEntity = _locationRepo.Get(s.LocationID)
            Return ICalEvent("session.ics", loc.CodeAndName, _
                                   s.SessionName, s.SessionName, _
                                   s.StartDateUTC, s.EndDateUTC)
        End Function
    End Class

Public Class ICalEventResult
        Inherits ActionResult
 
        Private _startUtc As DateTime
        Private _endUtc As DateTime
        Private _summary As String
        Private _description As String
        Private _location As String
        Private _fileName As String
 
        Public Sub New(ByVal startUtc As DateTime, ByVal endUtc As DateTime, _
                       ByVal summary As String, ByVal description As String, _
                       ByVal location As String, ByVal fileName As String)
 
            _startUtc = startUtc
            _endUtc = endUtc
            _summary = summary
            _description = description
            _location = location
            _fileName = fileName
 
        End Sub
 
        Public Overrides Sub ExecuteResult(ByVal context As System.Web.Mvc.ControllerContext)
            Dim str As New StringBuilder()
            With str
                .AppendLine("BEGIN:VCALENDAR")
                .AppendLine("VERSION:2.0")
                .AppendLine("BEGIN:VEVENT")
                .AppendLine(String.Format("DTSTART:{0}", _startUtc.ToUniversalTimeString))
                .AppendLine(String.Format("DTEND:{0}", _endUtc.ToUniversalTimeString))
                .AppendLine(String.Format("SUMMARY:{0}", _summary))
                .AppendLine(String.Format("DESCRIPTION:{0}", _description))
                .AppendLine(String.Format("LOCATION:{0}", _location))
                .AppendLine("END:VEVENT")
                .AppendLine("END:VCALENDAR")
            End With
            context.HttpContext.Response.ContentType = "text/calendar"
            context.HttpContext.Response.AddHeader("Content-disposition", String.Format("attachment; filename={0}", _fileName))
            context.HttpContext.Response.Write(str.ToString)
            context.HttpContext.Response.End()
        End Sub
    End Class

sp_RENAME 'TABLENAME.COLUMNNAME', 'NEWCOLUMNNAME', 'COLUMN'
GO

sp_RENAME 'TABLENAME', 'NEWTABLENAME'
GO