SelectedDatesCollection.Clear Method ()
.NET Framework (current version)
Removes all System.DateTime objects from the collection.
Assembly: System.Web (in System.Web.dll)
Use this method to remove all System.DateTime objects from the SelectedDatesCollection collection and set the Count property to 0.
The following code example demonstrates how to use the Clear method to remove all System.DateTime objects from the SelectedDatesCollection collection and replace them with new System.DateTime objects.
<%@ Page Language="VB" AutoEventWireup="True" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head> <title>SelectedDatesCollection Add Example </title> <script runat="server"> Sub Page_Load(sender As Object, e As EventArgs) ' Initialize the VisibleDate property with today's date when ' the page is first loaded. If Not IsPostBack Then Calendar1.VisibleDate = Calendar1.TodaysDate End If End Sub Sub Button_Click(sender As Object, e As EventArgs) ' This method demonstrates how to select noncontiguous dates ' in the calendar. ' Get the month, day, and year of the date contained in the ' VisibleDate property. Dim CurrentMonth As Integer = Calendar1.VisibleDate.Month Dim CurrentYear As Integer = Calendar1.VisibleDate.Year ' Clear all selected dates. Calendar1.SelectedDates.Clear() ' Iterate through the current month and add all Wednesdays ' to the collection. Dim i As Integer For i = 1 To System.DateTime.DaysInMonth(CurrentYear, CurrentMonth) Dim CurrentDate As DateTime = _ New DateTime(CurrentYear, CurrentMonth, i) If CurrentDate.DayOfWeek = DayOfWeek.Wednesday Then Calendar1.SelectedDates.Add(CurrentDate) End If Next i ' Display the number of items selected. Message.Text = "Selection Count = " & _ Calendar1.SelectedDates.Count.ToString() End Sub Sub Selection_Change(sender As Object, e As EventArgs) ' Display the number of items selected. Message.Text = "Selection Count = " & _ Calendar1.SelectedDates.Count.ToString() End Sub </script> </head> <body> <form id="form1" runat="server"> <h3>SelectedDatesCollection Add Example </h3> Click the button to select all Wednesdays in the month. <br /><br /> <asp:Calendar ID="Calendar1" runat="server" SelectionMode="DayWeekMonth" OnSelectionChanged="Selection_Change" /> <hr /> <asp:Button id="SubmitButton" Text="Select All Weds in Month" OnClick="Button_Click" runat="server" /> <br /> <asp:Label id="Message" runat="server" /> </form> </body> </html>
.NET Framework
Available since 1.1
Available since 1.1
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