Data is null or not test in repeter using is condition

<%#!string.IsNullOrEmpty((((DataRowView)Container.DataItem)["AppointmentDate"]).ToString()) ? VIP.General.GetDateTimeFormat(Convert.ToDateTime(((DataRowView)Container.DataItem)["AppointmentDate"]).ToString()) : null%>

 <%#(DBNull.Value.Equals(((DataRowView)Container.DataItem)["StartDate"])==false)?Convert.ToDateTime(((DataRowView)Container.DataItem)["StartDate"]).ToString("dd/MMM/yyyy"):""%>


//Db AttechFile

<connectionStrings>
    <add name="DefaultConnection" 
         connectionString="Data Source=(LocalDb)\v11.0;
                           Initial Catalog=aspnet-MvcMovie-users;
                           Integrated Security=SSPI;
                           AttachDBFilename=|DataDirectory|\aspnet-MvcMovie-users.mdf"
         providerName="System.Data.SqlClient" />

    <add name="MovieDBContext" connectionString="Data Source=(LocalDB)\v11.0; AttachDbFilename=|DataDirectory|\Movies.mdf; Integrated Security=True" providerName="System.Data.SqlClient" />
</connectionStrings>