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How to limit the navigation to present and future periods only

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Article relates to

 RadScheduler 

Created by

 Simon, Telerik

Last modified by

 Plamen, Telerik

HOW TO
Limit the navigation in RadScheduler to present and future periods only. In Week/Month/Timeline View the first valid period will be the one containing the Today's Date.

DESCRIPTION
RadScheduler's interface allows the user to navigate to any date either through its embedded Calendar or the rest of the navigational controls - the Previous, Next and Today buttons.

Sometimes, you may want to limit the user from navigating to periods which are in the past.

SOLUTION
Handle the NavigationCommand event of RadScheduler and verify if the user tries to navigate to a past period. If so, just cancel the event. Additionally, you could set the selected Date to be Today in case the user navigates through the Calendar to a past Date. Below is the code for the NavigationCommand event handler.

[C#]
protected void RadScheduler1_NavigationCommand(object sender, SchedulerNavigationCommandEventArgs e) 
{ 
    if (e.Command == SchedulerNavigationCommand.NavigateToSelectedDate) 
    { 
        if (e.SelectedDate < DateTime.Today) 
        { 
            e.Cancel = true; 
 
            //Uncomment if you want to navigate to the first available range. 
            //this.RadScheduler1.SelectedDate = DateTime.Today; 
        } 
    } 
    else 
    { 
        if ((e.Command == SchedulerNavigationCommand.DisplayPreviousAppointmentSegment) || 
            (e.Command == SchedulerNavigationCommand.NavigateToPreviousPeriod)) 
        { 
            if (this.RadScheduler1.SelectedView == SchedulerViewType.DayView) 
            { 
                if (this.RadScheduler1.SelectedDate == DateTime.Today) 
                { 
                    e.Cancel = true; 
                } 
            } 
            else if (this.RadScheduler1.SelectedView == SchedulerViewType.WeekView) 
            { 
                if (this.RadScheduler1.SelectedDate.AddDays(-7) < DateTime.Today) 
                { 
                    e.Cancel = true; 
                } 
            } 
            else if (this.RadScheduler1.SelectedView == SchedulerViewType.MonthView) 
            { 
                if (this.RadScheduler1.SelectedDate.AddMonths(-1) < DateTime.Today) 
                { 
                    e.Cancel = true; 
                } 
            } 
            else if (this.RadScheduler1.SelectedView == SchedulerViewType.TimelineView) 
            { 
                if (this.RadScheduler1.SelectedDate.AddDays(-1) < DateTime.Today) 
                { 
                    e.Cancel = true; 
                } 
            } 
        } 
    } 
} 

[VB]
Protected Sub RadScheduler1_NavigationCommand(ByVal sender As Object, _ 
    ByVal e As SchedulerNavigationCommandEventArgs) 
    If e.Command = SchedulerNavigationCommand.NavigateToSelectedDate Then 
        If e.SelectedDate < DateTime.Today Then 
            e.Cancel = True 
 
            'Uncomment if you want to navigate to the first available range. 
            'this.RadScheduler1.SelectedDate = DateTime.Today; 
        End If 
    Else 
        If (e.Command = SchedulerNavigationCommand.DisplayPreviousAppointmentSegment) OrElse _ 
           (e.Command = SchedulerNavigationCommand.NavigateToPreviousPeriod) Then 
            If Me.RadScheduler1.SelectedView = SchedulerViewType.DayView Then 
                If Me.RadScheduler1.SelectedDate = DateTime.Today Then 
                    e.Cancel = True 
                End If 
            ElseIf Me.RadScheduler1.SelectedView = SchedulerViewType.WeekView Then 
                If Me.RadScheduler1.SelectedDate.AddDays(-7) < DateTime.Today Then 
                    e.Cancel = True 
                End If 
            ElseIf Me.RadScheduler1.SelectedView = SchedulerViewType.MonthView Then 
                If Me.RadScheduler1.SelectedDate.AddMonths(-1) < DateTime.Today Then 
                    e.Cancel = True 
                End If 
            ElseIf Me.RadScheduler1.SelectedView = SchedulerViewType.TimelineView Then 
                If Me.RadScheduler1.SelectedDate.AddDays(-1) < DateTime.Today Then 
                    e.Cancel = True 
                End If 
            End If 
        End If 
    End If 
End Sub 

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