Context menu breaking my application

[Alan]

Hi,

I have some code which displays timings in the allday row, specifically this one. My Code is:

protected void radScheduler_TimeSlotCreated(object sender, TimeSlotCreatedEventArgs e)
{
    // Calculate total hours per day.
    if (radScheduler.SelectedView == SchedulerViewType.WeekView && e.TimeSlot.Duration.TotalDays == 1)
    {
        double totalHoursPerDay         = 0;
        double totalOvertimeHoursPerDay = 0;
        bool weekend = false;

        if (e.TimeSlot.Start.DayOfWeek == DayOfWeek.Saturday || e.TimeSlot.Start.DayOfWeek == DayOfWeek.Sunday)
        {
            weekend = true;
        }

        foreach (Appointment a in radScheduler.Appointments.GetAppointmentsInRange(e.TimeSlot.Start, e.TimeSlot.End))
        {
            // Check time of appointment and adding to hours or overtime accordingly.
            if (a.Start.TimeOfDay >= new TimeSpan(8, 0, 0) && a.End.TimeOfDay <= new TimeSpan(19, 0, 0) && weekend)
            {
                totalOvertimeHoursPerDay += a.Duration.TotalHours;
            }
            else if (a.Start.TimeOfDay >= new TimeSpan(8, 0, 0) && a.End.TimeOfDay <= newTimeSpan(17, 0, 0))
            {
                totalHoursPerDay += a.Duration.TotalHours;
            }
            else if (a.Start.TimeOfDay > new TimeSpan(17, 0, 0) && a.End.TimeOfDay <= newTimeSpan(19, 0, 0))
            {
                totalOvertimeHoursPerDay += a.Duration.TotalHours;
            }
            else if (a.Start.TimeOfDay >= new TimeSpan(8, 0, 0) && a.End.TimeOfDay <= newTimeSpan(19, 0, 0))
            {
                double overtime = a.End.TimeOfDay.TotalHours - 17;
                totalOvertimeHoursPerDay += overtime;
                totalHoursPerDay += (a.Duration.TotalHours - overtime);
            }
        }

        Literal hoursLiteral       = new Literal();
        Literal overtimeLiteral    = new Literal();

        if (!weekend)
        {
            hoursLiteral.Text = "Hrs: " + totalHoursPerDay.ToString();
        }

        overtimeLiteral.Text = " O/T: " + totalOvertimeHoursPerDay.ToString();

        radScheduler.Controls.Add(hoursLiteral);
        radScheduler.Controls.Add(overtimeLiteral);

        e.TimeSlot.Control.Controls.Add(hoursLiteral);
        e.TimeSlot.Control.Controls.Add(overtimeLiteral);
    }
}

With the context menu enabled, this is causing an exception when I switch week (in weekview). The exception is: "Failed to load viewstate.  The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request.  For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.", and it happens on:

radScheduler.Controls.Add(hoursLiteral);

You can find a sample code here.

Thank you for your support.

Daryl

[Alan]

Forgot to add scheduler declaration code.

<telerik:RadScheduler ID="radScheduler" runat="server" DayEndTime="19:00:00" FirstDayOfWeek="Monday"
    LastDayOfWeek="Sunday" OverflowBehavior="Expand" SelectedView="WeekView" ShowAllDayRow="True"
    ShowFooter="False" Skin="Windows7" WorkDayEndTime="19:00:00" OnClientAppointmentClick="OnClientAppointmentClick"
    OnClientTimeSlotClick="OnClientTimeSlotClick" ShowViewTabs="False" CustomAttributeNames="Task, FileCode, DocketNo"
    AdvancedForm-EnableCustomAttributeEditing="true" AllowInsert="False" OnTimeSlotCreated="radScheduler_TimeSlotCreated"
    OnFormCreated="radScheduler_FormCreated" StartInsertingInAdvancedForm="false"
    EnableDescriptionField="true" EnableCustomAttributeEditing="true" Localization-AdvancedSubject="Code Center"
    OnAppointmentContextMenuItemClicked="radScheduler_AppointmentContextMenuItemClicked"
    EnableExactTimeRendering="true" OnNavigationComplete="radScheduler_NavigationComplete">
    <AdvancedForm Modal="True" />
    <Localization AdvancedSubject="Code Center"></Localization>
    <TimelineView UserSelectable="False" />
    <MonthView UserSelectable="False" />
    <AppointmentContextMenus>
        <telerik:RadSchedulerContextMenu ID="contextMenu" runat="server">
            <Items>
                <telerik:RadMenuItem runat="server" Text="Negate Timesheet" Value="NegateCommand">
                </telerik:RadMenuItem>
            </Items>
        </telerik:RadSchedulerContextMenu>
    </AppointmentContextMenus>
    <AppointmentContextMenuSettings Skin="Windows7" />
</telerik:RadScheduler>

[Peter]

Hi Daryl,

Thank you for providing a working demo of the issue.

I wasn't able to find out exactly why this problem occurs, but you can workaround it by setting EnableViewState="false" for RadScheduler and setting the data binding properties in Page_Init instead of Page_Load:.

protected void Page_Init(object sender, EventArgs e)
    {
        List<Event> eventsList = new List<Event>();

        //Event events = new Event();
        //events.eventID = 1;
        //events.start = DateTime.Today.AddHours(9);
        //events.end = DateTime.Today.AddHours(12);
        //events.subject = "Test";
        //events.description = "Test Description";
        //eventsList.Add(events);
        radScheduler.DataSource = eventsList;
        radScheduler.DataKeyField = "eventID";
        radScheduler.DataStartField = "start";
        radScheduler.DataEndField = "end";
        radScheduler.DataDescriptionField = "descritpion";
        radScheduler.DataSubjectField = "subject";
    }

I will log this problem and we will investigate further, but in the meantime I hope the above solution works well for your case.


Kind regards,
Peter
the Telerik team

[Alan]

Thanks Peter,

That was just a demo, the real application is getting data from the database. Which means it's not ideal to query the database every time there's a postback (since there's no caching implemented yet). For now I'm going to leave it that way, since theres not much data yet.

I had to modify it a bit, instead it's doing like this:

protected void Page_Init(object sender, EventArgs e)
{
    radScheduler.DataKeyField = "ID";
    radScheduler.DataStartField = "From";
    radScheduler.DataEndField = "To";
    radScheduler.DataDescriptionField = "Description";
    radScheduler.DataSubjectField = "CostCenter";
}

Instead setting the datasource in page load, because for some reason other viewstate variables were losing value.

Many thanks for your consistent help,
Daryl