Demonstrates how to report errors for entering an unselectable date

<script runat="server">

   protected void Button1_OnClick(object sender, EventArgs e)
   {
      if (PeterBlum.DES.Globals.WebFormDirector.IsValid)
      {
         // save the data
      }
   }
  
</script>

<p>
   In this example, Sunday and Wednesday are not valid. The <span class="ControlClass">PeterBlum.DES.Web.WebControls.SpecialDayOfWeek</span> 
   objects provide a string to show in the validator's error message. That string is defined
   in the Label property and shown by using the {DATELABEL} token in the 
   <span class="PropertyName">UnselectableDatesValidator.ErrorMessage</span> property.
   If no label is defined, it falls back to the value in 
   <span class="PropertyName">UnselectableDatesValidator.NoLabelErrorMessage</span>.</p>
<p>
Enter dates in the textbox. When you enter a date that is Sunday or Wednesday, an error is shown.
Also note that the DateTextBox's calendar follows the rules of the SpecialDates control.
</p>
   <des:DateTextBox ID="DateTextBox1" runat="server" SpecialDatesControlID="SpecialDates1" Hint="Closed on Sundays and Wednesday" />
   <des:UnselectableDatesValidator ID="UnselectableDatesValidator1" runat="server" 
      ControlIDToEvaluate="DateTextBox1"
      ErrorMessage="That date cannot be used. We are closed on {DATELABEL}."
      NoLabelErrorMessage="that date"  />
   <des:SpecialDates ID="SpecialDates1" runat="server" UnknownDatesAreUnselectable="False">
      <des:SpecialDayOfWeek Label="Sundays" Selectable="Unselectable" DayOfWeek="Sunday"></des:SpecialDayOfWeek>
      <des:SpecialDayOfWeek Label="Wednesdays" Selectable="Unselectable" DayOfWeek="Wednesday"></des:SpecialDayOfWeek>
   </des:SpecialDates>
   <br/>
   <br/>
   <des:Button ID="Button1" runat="server" Text="Client Side" OnClick="Button1_OnClick" />