ASP.NET Tutorial/Cookie/Read — различия между версиями

Материал из .Net Framework эксперт
Перейти к: навигация, поиск
м (1 версия)
 
(нет различий)

Версия 18:30, 26 мая 2010

List all cookies contained in the Request.Cookies collection

   <source lang="csharp">

<%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server">

   void Page_Load()
   {
       ArrayList colCookies = new ArrayList();
       for (int i = 0; i < Request.Cookies.Count; i++)
           colCookies.Add(Request.Cookies[i]);
       grdCookies.DataSource = colCookies;
       grdCookies.DataBind();
   }

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">

   <title>Get All Cookies</title>

</head> <body>

   <form id="form1" runat="server">
   <asp:GridView
       id="grdCookies"
       Runat="server"/>
   </form>

</body> </html></source>


Read cookie, if not there, create one (C#)

   <source lang="csharp">

File: Default.ascx <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="CookieExample" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server">

   <title>Untitled Page</title>

</head> <body>

   <form id="form1" runat="server">
       <asp:Label ID="lblWelcome" runat="server" EnableViewState="False" ></asp:Label>
     
Name: <asp:TextBox ID="txtName" runat="server" Width="178px"></asp:TextBox> <asp:Button ID="cmdStore" runat="server" OnClick="cmdStore_Click" Text="Create Cookie" />
   </form>

</body> </html> File: Default.ascx.cs using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; public partial class CookieExample : System.Web.UI.Page {

   protected void Page_Load(object sender, EventArgs e)
   {
   HttpCookie cookie = Request.Cookies["Preferences"];
   if (cookie == null)
   {
     lblWelcome.Text = "Unknown Customer";
   }
   else
   {
     lblWelcome.Text = "Cookie Found.

"; lblWelcome.Text += "Welcome, " + cookie["Name"]; } } protected void cmdStore_Click(object sender, EventArgs e) { HttpCookie cookie = Request.Cookies["Preferences"]; if (cookie == null) { cookie = new HttpCookie("Preferences"); } cookie["Name"] = txtName.Text; cookie.Expires = DateTime.Now.AddYears(1); Response.Cookies.Add(cookie); lblWelcome.Text = "Cookie Created.

"; lblWelcome.Text += "New Customer: " + cookie["Name"]; }

}</source>


Reading Cookies

   <source lang="csharp">

<%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server">

   void Page_Load()
   {
       if (Request.Cookies["message"] != null)
           lblCookieValue.Text = Request.Cookies["message"].Value;
   }

</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">

   <title>Get Cookie</title>

</head> <body>

   <form id="form1" runat="server">
   The value of the message cookie is:
   <asp:Label
       id="lblCookieValue"
       Runat="server" />
   </form>

</body> </html></source>