c#写入cookie。js获取

基础上的不扎实，对很多计算机名词不是很理解，更不能明白他们的基本原理。所以在用程序C#记录cookie,前端用js读入cookie时，费了我不少劲。终于现在弄懂了怎么回事。好了 直接上代码吧。

    <script src="Scripts/jquery-1.2.6.min.js" type="text/javascript"></script>
      <script type="text/javascript">
          function getCookie(name)//取cookies函数        
          {
              var arr = document.cookie.match(new RegExp("(^| )" + name + "=([^;]*)(;|$)"));
              if (arr != null) return unescape(arr[2]); return null;
          }
          $(function () {
              $("#btn").click(function () {
                  $("#read").val(getCookie('username'));
              })
          }) 
                  
         
</script> 

<form id="form1" runat="server">
    <div>
    <input type="text" id="txt" name="txts" /><asp:Button ID="Button1" runat="server"  Text="写cookie" onclick="Button1_Click" /><br />
    <input type="text" id="read" /><input type="button" id="btn" value="读cookie" />
    </div>
    </form>

public static string test;
        protected void Page_Load(object sender, EventArgs e)
        {
           
        }
        protected void Button1_Click(object sender, EventArgs e)
        {
            test = HttpContext.Current.Request.Form["txts"];         
            test = HttpUtility.UrlEncodeUnicode(test);//对字符串进行js式escape编码。
            HttpCookie txtcookie = new HttpCookie("username", test);
            DateTime dt = new DateTime();
            dt = DateTime.Now;
            TimeSpan ts = new TimeSpan(0, 0, 1, 0);
            txtcookie.Expires = dt.Add(ts);
            Response.SetCookie(txtcookie);
        }