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Calendar.SelectionChanged Event

Occurs when the user selects a day, a week, or an entire month by clicking the date selector controls.

Namespace:  System.Web.UI.WebControls
Assembly:  System.Web (in System.Web.dll)

public event EventHandler SelectionChanged
<asp:Calendar OnSelectionChanged="EventHandler" />

This event is raised when the user selects a day, a week, or an entire month by clicking the date selector controls.

For more information about handling events, see Events and Delegates.

TopicLocation
Walkthrough: Creating a Basic Web Page in Visual Web DeveloperBuilding ASP .NET Web Applications in Visual Studio

The following code example demonstrates how to specify and code a handler for the SelectionChanged event to display the number of items selected in the Calendar control.

<%@ Page Language="C#" 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 runat="server">
    <title>Calendar SelectionChanged Example</title>
<script runat="server">

      void Selection_Change(Object sender, EventArgs e) 
      {

         // Clear the current text.
         Message.Text = "";

         // Iterate through the SelectedDates collection and display the 
         // dates selected in the Calendar control. 
         foreach(DateTime day in Calendar1.SelectedDates)
         {

            Message.Text += day.Date.ToShortDateString() + "<br />";

         }

      }

   </script>

</head>     
<body>

   <form id="form1" runat="server">

      <h3>Calendar SelectionChanged Example</h3>

      Select dates on the Calendar control.<br /><br />

      <asp:Calendar ID="Calendar1" runat="server"  
           SelectionMode="DayWeekMonth" 
           ShowGridLines="True"             
           OnSelectionChanged="Selection_Change">

         <SelectedDayStyle BackColor="Yellow"
                           ForeColor="Red">
         </SelectedDayStyle>

      </asp:Calendar>

      <hr />

      <table border="1">

         <tr style="background-color:silver">

            <th>

               Selected Dates:

            </th>
         </tr>

         <tr>

            <td>

               <asp:Label id="Message" 
                    Text="No dates selected." 
                    runat="server"/>

            </td>

         </tr>

      </table>

   </form>

</body>

</html>
<%@ Page Language="C#" 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 runat="server">
    <title>Calendar SelectionChanged Example</title>
<script runat="server">

      void Selection_Change(Object sender, EventArgs e) 
      {

         // Clear the current text.
         Message.Text = "";

         // Iterate through the SelectedDates collection and display the 
         // dates selected in the Calendar control. 
         foreach(DateTime day in Calendar1.SelectedDates)
         {

            Message.Text += day.Date.ToShortDateString() + "<br />";

         }

      }

      void Page_Load(Object sender, EventArgs e)
      {

         // Manually register the event-handling method for the   
         // SelectionChanged event of the Calendar control.
         Calendar1.SelectionChanged += new EventHandler(this.Selection_Change);

      }


   </script>

</head>     
<body>

   <form id="form1" runat="server">

      <h3>Calendar SelectionChanged Example</h3>

      Select a day, week, or month on the Calendar control.<br /><br />

      <asp:Calendar ID="Calendar1" runat="server"  
           SelectionMode="DayWeekMonth" 
           ShowGridLines="True">

         <SelectedDayStyle BackColor="Yellow"
                           ForeColor="Red">
         </SelectedDayStyle>

      </asp:Calendar>

      <hr />

      <table border="1">

         <tr style="background-color:silver">

            <th>

               Selected dates

            </th>
         </tr>

         <tr>

            <td>

               <asp:Label id="Message" 
                    Text="No dates selected." 
                    runat="server"/>

            </td>

         </tr>

      </table>

   </form>

</body>

</html>

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

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