[Solved] Null Reference Exception

[Ricky Jones]

When attempting to save an appointment I get the following a NullReferenceException.

Call Stack

[NullReferenceException: Object reference not set to an instance of an object.]Telerik.Web.UI.AdvancedTemplate.get_Range() +1509Telerik.Web.UI.AdvancedTemplate.<CreateBasicControlsValidators>b__1(Object source, ServerValidateEventArgs args) +40System.Web.UI.WebControls.CustomValidator.OnServerValidate(String value) +140System.Web.UI.WebControls.CustomValidator.EvaluateIsValid() +113System.Web.UI.WebControls.BaseValidator.Validate() +72System.Web.UI.Page.Validate(String validationGroup) +8742012System.Web.UI.WebControls.LinkButton.RaisePostBackEvent(String eventArgument) +8737174System.Web.UI.WebControls.LinkButton.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +175System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565

Example Code.

    public class QuoteRateProvider : Telerik.Web.UI.SchedulerProviderBase

    {

        /// <summary>

        /// Converts the quote day to appt data.

        /// </summary>

        /// <param name="rate">The rate.</param>

        /// <returns></returns>

        Appointment ConvertQuoteDayToApptData(QuoteRateDay rate)

        {

            Appointment data = new Appointment();

            data.Subject = rate.Description;

            data.Visible = true;

            data.Start = rate.StartDate;

            data.End = rate.EndDate;

            data.Attributes.Add("ManualRatePercentage", rate.ManualQuotePercentage.ToString());

            foreach (string cls in rate.AircraftClasses)

            {

                Resource r = new Resource("AircraftClass", cls, cls);

                data.Resources.Add(r);

            }

            data.ID = rate.ID;

            data.DataItem = rate;

            return data;

        }

        /// <summary>

        /// Converts the quote day to appt data.

        /// </summary>

        /// <param name="rates">The rates.</param>

        /// <returns></returns>

        List<Appointment> ConvertQuoteDayToApptData(IEnumerable<QuoteRateDay> rates)

        {

            List<Appointment> returnList = new List<Appointment>();

            foreach (QuoteRateDay rate in rates)

            {

                returnList.Add(ConvertQuoteDayToApptData(rate));

            }

            return returnList;

        }

        /// <summary>

        /// Converts the appt data to quote day rate.

        /// </summary>

        /// <param name="data">The data.</param>

        /// <returns></returns>

        QuoteRateDay ConvertApptDataToQuoteDay(Appointment data)

        {

            QuoteRateDay rate = new QuoteRateDay();

            rate.Description = data.Subject;

            rate.StartDate = data.Start;

            rate.EndDate = data.End;

            rate.ManualQuotePercentage = Convert.ToDecimal(data.Attributes["ManualRatePercentage"]);

            rate.ID = Convert.ToInt32(data.ID);

            foreach (Resource r in data.Resources)

            {

                rate.AircraftClasses.Add(r.Text);

            }

            return rate;

        }

        /// <summary>

        /// Converts the quote days to appt data.

        /// </summary>

        /// <param name="rates">The rates.</param>

        /// <returns></returns>

        IEnumerable<Appointment> ConvertApptDataToQuoteDay(IEnumerable<QuoteRateDay> rates)

        {

            List<Appointment> data = new List<Appointment>();

            foreach (QuoteRateDay rate in rates)

            {

                data.Add(ConvertQuoteDayToApptData(rate));

            }

            return data;

        }

        public override void Delete(Telerik.Web.UI.RadScheduler owner, Telerik.Web.UI.Appointment appointmentToDelete)

        {

            QuoteRateDayDataAccess.DeleteDailyQuoteRate(Convert.ToInt32(appointmentToDelete.ID));

        }

        public override IEnumerable<Telerik.Web.UI.Appointment> GetAppointments(Telerik.Web.UI.RadScheduler owner)

        {

            return ConvertQuoteDayToApptData(QuoteRateDayDataAccess.GetQuoteRateDays(owner.VisibleRangeStart, owner.VisibleRangeEnd));

        }

        public override IEnumerable<Telerik.Web.UI.ResourceType> GetResourceTypes(Telerik.Web.UI.RadScheduler owner)

        {

            ResourceType t = new ResourceType("AircraftClass", true);

            

            List<ResourceType> rt = new List<ResourceType>();

            rt.Add(t);

            return rt;

        }

        public override IEnumerable<Telerik.Web.UI.Resource> GetResourcesByType(Telerik.Web.UI.RadScheduler owner, string resourceType)

        {

            List<Resource> rt = new List<Resource>();

            rt.Add(new Resource("AircraftClass", "HVY", "HVY"));

            rt.Add(new Resource("AircraftClass", "MID", "MID"));

            rt.Add(new Resource("AircraftClass", "LGT", "LGT"));

            return rt;

        }

        public override void Insert(Telerik.Web.UI.RadScheduler owner, Telerik.Web.UI.Appointment appointmentToInsert)

        {

            QuoteRateDayDataAccess.InsertDailyQuoteRate(ConvertApptDataToQuoteDay(appointmentToInsert));

        }

        public override void Update(Telerik.Web.UI.RadScheduler owner, Telerik.Web.UI.Appointment appointmentToUpdate)

        {

            QuoteRateDayDataAccess.UpdateDailyQuoteRate(ConvertApptDataToQuoteDay(appointmentToUpdate));

        }

    }