Telerik Scheduler RadSchedulerRecurrenceEditor.RecurrenceRule.MaximumCandidates does not work : Possible bug since 2010

4 posts, 0 answers
  1. Matt
    Matt avatar
    3 posts
    Member since:
    Feb 2008

    Posted 27 Mar 2017 Link to this post

    My project still uses Telerik v2011.1.413.35 and came across an issue with the recurrence editor. Here are the settings:

    Recurrence: Hourly
    Recur every: 1 hr
    Repeat end: End By
    End by: 10/3/2018

    The above setting when configured in UI or preset at Page_Load always generates and stops at only 3000 occurrences. I tried setting/overriding RadSchedulerRecurrenceEditor.RecurrenceRule.MaximumCandidates and RadSchedulerRecurrenceEditor.RecurrenceRule.Range.MaxOccurrences during Page_Load or on click/submit of form, before accessing Occurrences property, as suggested in these forum topics: Link 1, Link 2. That does not work.

    So, I went ahead and installed the latest Telerik UI for ASP.NET AJAX, and tried the same experiement a fresh, simple page that only has the recurrence editor, and still does not work. Below is the code snippet, both ASPX and VB page.

    01.<%@ Page Language="VB" AutoEventWireup="false" CodeFile="RecurrenceEditor.aspx.vb" Inherits="RecurrenceEditor" %>
    03.<!DOCTYPE html>
    06.<head runat="server">
    07.    <title></title>
    08.    <telerik:RadStyleSheetManager id="RadStyleSheetManager1" runat="server" />
    11.    <form id="form1" runat="server">
    12.        <telerik:RadScriptManager ID="RadScriptManager1" runat="server"></telerik:RadScriptManager>
    13.        <asp:Panel ID="pnlRadRecurrenceEditorTest" runat="server" CssClass="ssection" Width="600">
    14.            <telerik:RadSchedulerRecurrenceEditor ID="radRecurEditor" runat="server"></telerik:RadSchedulerRecurrenceEditor>
    15.            <asp:Button ID="btnRadRecurrenceEditorSubmit" runat="server" Text="Schedule Submit" /><br />
    16.            <asp:Label ID="lblRadRecurrenceEditorDetails" runat="server"></asp:Label>
    17.        </asp:Panel>
    18.    </form>
    01.Imports Telerik.Web.UI
    03.Partial Class RecurrenceEditor
    04.    Inherits System.Web.UI.Page
    06.    Protected Sub Page_Load_Recurrence(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    07.        lblRadRecurrenceEditorDetails.Text = String.Empty
    08.        If IsPostBack Then Exit Sub
    09.        'NOTE: With or without the below code commented, I cannot get occcurrences > 3000 in count
    10.        Dim endDate As New Date(2018, 10, 4)
    11.        radRecurEditor.StartDate = Now()
    12.        radRecurEditor.EndDate = endDate
    13.        radRecurEditor.RecurrenceRule = New HourlyRecurrenceRule(1, New RecurrenceRange(Now(), TimeSpan.Zero, endDate, 0))
    14.        radRecurEditor.RecurrenceRule.Range.MaxOccurrences = 10002
    15.        radRecurEditor.RecurrenceRule.MaximumCandidates = 10001
    16.        lblRadRecurrenceEditorDetails.Text += "<br>Max occurrences: " & radRecurEditor.RecurrenceRule.Range.MaxOccurrences.ToString()
    17.        lblRadRecurrenceEditorDetails.Text += "<br>Max candidates: " & radRecurEditor.RecurrenceRule.MaximumCandidates.ToString()
    18.    End Sub
    19.    Protected Sub btnRadRecurrenceEditorSubmit_Click(sender As Object, e As EventArgs) Handles btnRadRecurrenceEditorSubmit.Click
    20.        Dim output As New List(Of String)
    21.        output.Add("Max candidates: " & radRecurEditor.RecurrenceRule.MaximumCandidates.ToString())
    22.        radRecurEditor.RecurrenceRule.MaximumCandidates = 10000 'doesn't work
    23.        output.Add("Max candidates changed to: " & radRecurEditor.RecurrenceRule.MaximumCandidates)
    24.        output.Add("Max occurrences: " & radRecurEditor.RecurrenceRule.Range.MaxOccurrences.ToString())
    25.        output.Add("ToList count: " & radRecurEditor.RecurrenceRule.Occurrences.ToList().Count)
    26.        output.Add("Total count: " & radRecurEditor.RecurrenceRule.Occurrences.Count)
    27.        output.Add("Last recurring date: " & radRecurEditor.RecurrenceRule.Occurrences.LastOrDefault())
    28.        lblRadRecurrenceEditorDetails.Text = String.Join("<br>", output)
    29.    End Sub
    31.End Class


    I have also attached the resultant page view.

    Let me know what I'm doing wrong here, or if this is an actual bug in the tool.


  2. Matt
    Matt avatar
    3 posts
    Member since:
    Feb 2008

    Posted 28 Mar 2017 Link to this post

    The issue is really really odd. I think this is a bug, but I'm open to explanation of such implementation. Following explains the issue.

    If I try to set `MaximumCandidates` by directly referencing the rad schedule recurrence editor, it does not work. BUT, if I assign `RecurrenceRule` property of the editor to a variable, and then set the max property, it works. Following is the code snippet explaining it.

    1.radRecurEditor.RecurrenceRule.MaximumCandidates = Integer.MaxValue 'does not work!
    2.radRecurrenceRule.MaximumCandidates = Integer.MaxValue 'works!!


    Oh well!

  3. Matt
    Matt avatar
    3 posts
    Member since:
    Feb 2008

    Posted 28 Mar 2017 Link to this post

    Just to clarify, here is the complete code-behind snippet, in reference to the original issue post.

    01.Protected Sub Page_Load_Recurrence(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    02.    lblRadRecurrenceEditorDetails.Text = String.Empty
    03.    If IsPostBack Then Exit Sub
    04.End Sub
    05.Protected Sub btnRadRecurrenceEditorSubmit_Click(sender As Object, e As EventArgs) Handles btnRadRecurrenceEditorSubmit.Click
    06.    RecurrenceTestOutput(radRecurEditor.RecurrenceRule)
    07.End Sub
    09.Protected Sub RecurrenceTestOutput(radRecurrenceRule As RecurrenceRule)
    10.    Dim output As New List(Of String)
    11.    output.Add("Max candidates: " & radRecurrenceRule.MaximumCandidates.ToString())
    12.    radRecurEditor.RecurrenceRule.MaximumCandidates = Integer.MaxValue 'does not work!
    13.    radRecurrenceRule.MaximumCandidates = Integer.MaxValue 'works!!
    14.    output.Add("Max candidates changed to: " & radRecurrenceRule.MaximumCandidates)
    15.    output.Add("Max occurrences: " & radRecurrenceRule.Range.MaxOccurrences.ToString())
    16.    output.Add("ToList count: " & radRecurrenceRule.Occurrences.ToList().Count)
    17.    output.Add("Total count: " & radRecurrenceRule.Occurrences.Count)
    18.    output.Add("Last recurring date: " & radRecurrenceRule.Occurrences.LastOrDefault())
    19.    lblRadRecurrenceEditorDetails.Text += String.Join("<br>", output)
    20.End Sub


  4. Peter Milchev
    Peter Milchev avatar
    689 posts

    Posted 30 Mar 2017 Link to this post

    Hello Matt,

    The RecurrenceEditor RecurrenceRule setter is designed to get only the Recurrence rule text, which does not contain the number of max candidates. That is why the first approach is not changing the MaximumCandidates property. 

    In such scenarios, where the recurrence rule needs to be modified, we recommend the approach that you have used in your next reply, assigning the rule to a variable and modify and use the variable.

    Peter Milchev
    Telerik by Progress
    Try our brand new, jQuery-free Angular 2 components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.
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