AppointmentDataBound fires twice when changing views

[Ross Dunham]

I have 4 appointments that I am loading from a custom datasource(datatable) into the RadScheduler control.

When the page first loads the AppointmentDataBound event occurs 4 times. (once for each appointment)

When I change VIEWS (from MONTH to WEEK or vice versa) that the AppointmentDataBound event occurs 8 times.
Double.

Am I doing something wrong?  Is this by design?
Is there anything that I can do to stop it from doing this?

Thanks in advance for any guidance.

[Ivana]

Hello Ross,

I could not produce the behavior in question, locally. I've tested the scenario when appointments are added  to the RadScheduler on Page_Load event, and when it is bound to a data source (Xml and SqlDataSource). In both cases everything was working as expected.

Please paste some of your server-side code here, or send us a support ticket with a runnable sample page reproducing the issue.

Kind regards,
Ivana
the Telerik team

[Ross Dunham]

Hi Ivana,
Thank you very much for your response.  I suspected that the issue is on my end.
Lets start with me putting up my my code and if we still can't figure it out, then I will submit a support ticket with a full solution.

Just to make sure I was clear, the databind happens the correct number of times on FormLoad.
It's only when I click WEEK or MONTH, or back and forth between views that the databind happens double.

here is my RadScheduler control

<telerik:RadScheduler ID="radSchedulerHospital" runat="server" DataEndField="EndTime"
                        DataKeyField="ApptID" DataStartField="StartTime"
                        DataSubjectField="Subject" EnableDescriptionField="False" Height="" OverflowBehavior="Expand"
                        SelectedView="MonthView" StartInsertingInAdvancedForm="False"
                        AllowInsert="False" AllowDelete="False" AllowEdit="False"
                        CustomAttributeNames="LabID, LabID ,ApptTypeID, ApptTypeID" Skin="Office2007" ReadOnly="True" MonthView-VisibleAppointmentsPerDay="8">
                    <ExportSettings OpenInNewWindow="True">
                    </ExportSettings>
                    <TimelineView UserSelectable="False" />
                    <Reminders Enabled="False" />
                    <TimeSlotContextMenuSettings EnableDefault="False" />
                </telerik:RadScheduler>

Here is my Code Behind File

Imports System.Data
Imports Telerik.Web.UI
Imports RepSched.rsUser
Imports RepSched.rsAppt

Partial Class app_hospital_Default
    Inherits System.Web.UI.Page

    Private Const ApptKey As String = "hosp.appts"
    Private iPrevLabID As Integer = 0
    Private iCurrentColorIndex As Integer = 1
    Private iLabColor(8) As String

    Private ReadOnly Property Appointments() As DataTable
        Get
            Dim dtAppts As DataTable = TryCast(Session(ApptKey), DataTable)
            If IsNothing(dtAppts) Then
                dtAppts = LoadHospitalAppts(CInt(Session("HospitalID")))
                Session(ApptKey) = dtAppts
            End If
            Return dtAppts
        End Get
    End Property

    Protected Sub Page_Load(sender As Object, e As System.EventArgs) Handles Me.Load
        Session.Remove("NewLab")
        CheckRole(USERROLE_HOSPITAL, CInt(Session("Role")))

        'We are back to the hospital view, remove reference to LabID
        Session.Remove("LabID")

        If Not IsPostBack Then
            Dim db As New RepSchedulerDataContext
            lblHospitalName.Text = Session("HospitalName")
            Session.Remove(ApptKey)
        End If

        LoadColors()
        radSchedulerHospital.DataSource = Appointments

    End Sub

    Protected Sub radSchedulerHospital_AppointmentDataBound(ByVal sender As Object, ByVal e As SchedulerEventArgs) Handles radSchedulerHospital.AppointmentDataBound
        Dim iCurrentLabID As Integer = CInt(e.Appointment.Attributes("LabID"))

        'initialize first time running
        If iPrevLabID = 0 Then
            iPrevLabID = iCurrentLabID
        End If

        '  Increment color when we get to the next labs appointments
        If iCurrentLabID <> iPrevLabID Then
            iCurrentColorIndex += 1
            iPrevLabID = iCurrentLabID
        End If

        e.Appointment.CssClass = iLabColor(iCurrentColorIndex)
    End Sub

    Protected Sub LoadColors()
        iLabColor(1) = "rsCategoryDarkRed"
        iLabColor(2) = "rsCategoryDarkGreen"
        iLabColor(3) = "rsCategoryOrange"
        iLabColor(4) = "rsCategoryBlue"
        iLabColor(5) = "rsCategoryYellow"
        iLabColor(6) = "rsCategoryRed"
        iLabColor(7) = "rsCategoryGreen"
        iLabColor(8) = "rsCategoryDarkBlue"
    End Sub

    Protected Sub ibtnPdf_Click(sender As Object, e As System.Web.UI.ImageClickEventArgs) Handles ibtnPdf.Click
        CreateCalendarPDF(radSchedulerHospital)
    End Sub
End Class

Thanks in advance!!
Ross

[Alexander]

is there any solution?

the same problem occurs in my VS2008 project
(Code-Behind: C#)

greets

Alex

[Ivana]

Hi Ross Dunham,

The linked video below, shows how the OnAppointmentDataBound event behaves when the Scheduler is bound to a XML data provider, when I test it locally: OnAppointmentDataBound server-side call.

Please open a support ticket and send us a working sample project with the issues isolated in it, so we would be able to troubleshoot this problem locally.

All the best,
Ivana
the Telerik team