Error

An unexpected error has occurred on this page.The system administrators have been notified.

The error occurred in:

http://publish.ust.hk/WebAlbum2/Web/PreviewAlbum.aspx

Error Message:

Object cannot be cast from DBNull to other types.

Error Stack:

System.InvalidCastException: Object cannot be cast from DBNull to other types.
   at System.DBNull.System.IConvertible.ToInt32(IFormatProvider provider)
   at System.Convert.ToInt32(Object value)
   at PTC.WebAlbum2.Web.PreviewAlbum.Page_Load(Object sender, EventArgs e)
   at System.EventHandler.Invoke(Object sender, EventArgs e)
   at System.Web.UI.Control.OnLoad(EventArgs e)
   at System.Web.UI.Control.LoadRecursive()
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)