Get a asp: calender and a dropdownlist like bellow.........
<asp:calendar id="DateTimePicker" runat="server" onselectionchanged="DateTimePicker_SelectionChanged" xmlns:asp="#unknown">
<asp:dropdownlist id="ddlCalender" runat="server" height="22px" width="260px" xmlns:asp="#unknown">
<asp:listitem selected="True" value="">Select
and write code .aspx.cs page bellow...................
protected void DateTimePicker_SelectionChanged(object sender, EventArgs e)
{
try
{
string month = GetMonthName(DateTimePicker.SelectedDate);
ddlCalender.SelectedItem.Text = month.ToString();
}
catch (Exception ex)
{
throw ex;
}
}
public static string GetMonthName(DateTime givenDate)
{
var formatInfoinfo = new DateTimeFormatInfo();
string[] monthName = formatInfoinfo.MonthNames;
return monthName[givenDate.Month - 1];
}