SelectedDatesCollection Class
.NET Framework 3.0
Encapsulates a collection of System.DateTime objects that represent the selected dates in a Calendar control. This class cannot be inherited.
Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)
Assembly: System.Web (in system.web.dll)
'Declaration Public NotInheritable Class SelectedDatesCollection Implements ICollection, IEnumerable 'Usage Dim instance As SelectedDatesCollection
public final class SelectedDatesCollection implements ICollection, IEnumerable
public final class SelectedDatesCollection implements ICollection, IEnumerable
Not applicable.
Use this class to programmatically manage a collection of System.DateTime objects that represent the selected dates in a Calendar control. This class is commonly used to add or remove dates from the collection.
This collection stores only whole dates. The time portion of each System.DateTime is removed. The dates are stored in ascending order. If there are duplicate dates, only one date is stored in the collection.
The following code example demonstrates how to programmatically use the SelectedDatesCollection class to select dates in the Calendar control.
<%@ Page Language="VB"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) DisplayCalendar.VisibleDate = DisplayCalendar.TodaysDate End Sub Sub SelectButton_Click(ByVal sender As Object, ByVal e As EventArgs) Dim current_day As Integer = DisplayCalendar.VisibleDate.Day Dim current_month As Integer = DisplayCalendar.VisibleDate.Month Dim current_year As Integer = DisplayCalendar.VisibleDate.Year DisplayCalendar.SelectedDates.Clear() ' Iterate through the current month and add all Wednesdays to the ' SelectedDates collection of the Calendar control. Dim i As Integer For i = 1 To System.DateTime.DaysInMonth(current_year, current_month) Dim currentDate As New DateTime(current_year, current_month, i) If currentDate.DayOfWeek = DayOfWeek.Wednesday Then DisplayCalendar.SelectedDates.Add(currentDate) End If Next MessageLabel.Text = "Selection Count = " + DisplayCalendar.SelectedDates.Count.ToString() End Sub Sub DisplayCalendar_SelectionChanged(ByVal sender As Object, ByVal e As EventArgs) MessageLabel.Text = "Selection Count = " & DisplayCalendar.SelectedDates.Count.ToString() End Sub </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>ASP.NET Example</title> </head> <body> <form id="form1" runat="server"> <asp:calendar id="DisplayCalendar" runat="server" selectionmode="DayWeekMonth" onselectionchanged="DisplayCalendar_SelectionChanged" /> <hr /> <asp:button id="SelectButton" text="Select All Weds in Month" onclick="SelectButton_Click" runat="server"/> <br/> <asp:label id="MessageLabel" runat="server" /> </form> </body> </html>
- AspNetHostingPermission for operating in a hosted environment. Demand value: LinkDemand; Permission value: Minimal.
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