Unfortunately I don't think this is possible.
It is possible to change the text (client-side) based on the date, but the problems happen server-side because a "date in a certain format" is expected. Passing a string such as "Today" would not be parsed (server-side) into a date.
Here's an example of changing the textbox string client-side using the OnClientAfterSelectionChanged event handler.
<%@ Page Language="C#" %>
<%@ Register Assembly="BasicFrame.WebControls.BasicDatePicker" Namespace="BasicFrame.WebControls" TagPrefix="BDP" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
this.Label1.Text = this.BasicDatePicker1.SelectedDateFormatted;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
<title>Basic Date Picker Example</title>
<script type="text/javascript">
var selectionChanged = function(sender) {
if (sender.getSelectedDate().equals(Date.today())) {
sender.input.value = "Today";
}
};
</script>
</head>
<body>
<p><a href="SelectionChanged.aspx">Reload</a></p>
<form id="form1" runat="server">
<BDP:BasicDatePicker
ID="BasicDatePicker1"
runat="server"
OnClientAfterSelectionChanged="selectionChanged"
/>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="Submit" onclick="Button1_Click" />
<br />
<br />
<asp:Label ID="Label1" runat="server" />
</form>
</body>
</html>
Thanks,
Geoffrey McGill
----------------------------------------
Coolite Inc.
Email: support [at] coolite [dot] com
Phone: +1(888)775-5888