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Programming ASP.NET, Second Edition by Dan Hurwitz, Jesse Liberty

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Calendar

The ASP Calendar control is a rich web control that provides several capabilities:

  • Displays a calendar showing a single month

  • Allows the user to select a day, week, or month

  • Allows the user to select a range of days

  • Allows the user to move to the next or previous month

  • Allows all aspects of the appearance of the calendar to be customized either at design time or under program control

  • Programmatically controls the display of specific days

The Calendar control is extremely customizable, with a large variety of properties and events. Before digging into all the detail, look at a bare bones .aspx file showing a simple Calendar control, along with the resulting web page. Example 5-38 contains the code, and Figure 5-20 shows the results. Since there is no script block in this code, there is no need for equivalent C# and VB.NET versions.

Example 5-38. Simple Calendar control, Calendar-Simple.aspx

<html>
   <body>
   <form runat="server">

      <h1>ASP Controls</h1>
      <h2>Calendar Demonstration</h2>

      <asp:Calendar
         id="cal"
         runat="server" >
      </asp:Calendar>
   </form>
   </body>
</html>
A simple Calendar control

Figure 5-20. A simple Calendar control

Pretty spiffy. Very few lines of code yield a web page with a working calendar that displays the current month. The user can select a single day (although at this point nothing happens when a day is selected, other than it being highlighted) and move through the months by clicking on the < and ...

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