compare jquery datepicker with date in database in asp.net - asp.net

Question

I am newbie. I am working on asp.net website. I have added datepicker and it works fine. Now I want to get that date and compare it with date in my database. But I have no idea of how to do it. I also goggled but couldn't find any solution.
<%# Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="reserve" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">
<script type="text/javascript">
$(document).ready(function () {
$('#coin-slider').coinslider();
});
</script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<script type="text/javascript" src="jquery.datepick.js"></script>
<script type="text/javascript">
$(function () {
$('#popupDatepicker').datepick();
});
function showDate(date) {
alert('The date chosen is ' + date);
}
</script>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" Runat="Server">
<input type="text" id="popupDatepicker" />
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" onclick="Button1_Click" Text="Button" />
<div id='coin-slider' >
<a target="_blank"> </a>
<a>
<img id="Img2" src="~/Images/ar1.jpg" alt="header1" height="120" runat="server" style="width: 110px"/>
<img id="Img3" src="~/Images/ar2.jpg" alt="header1" height="120" runat="server" style="width: 110px"/>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
</a>
</div>
</asp:Content>

Answer 1

Use DateTime.Compare(Date1, Date2) in code behind.
it'll give you differnce between the datetimes. Is this what you looking for