ASP.NET Calendar - Date picker - show event

Click on the calendar image near the textbox.
Or click directly on the textbox.

    Select date

ASP.NET

<asp:TextBox ID="txtDate" runat="server" />

<obout:Calendar runat="server"
                         ID="Calendar1"
                         DatePickerMode="true"
                         TextBoxId="txtDate">
</obout:Calendar>    

C#

txtDate.Attributes.Add("onclick", Calendar1.ClientID + ".displayCalendar(event)");