ASP.Net/Session Cookie/Cookie — различия между версиями
Admin (обсуждение | вклад) м (1 версия) |
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(нет различий)
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Версия 18:30, 26 мая 2010
Содержание
- 1 Adding cache dependencies (VB.net)
- 2 Create and retrieve Cookie data (C#)
- 3 Delete All Cookies (C#)
- 4 Delete All Cookies
- 4.1 Delete Cookie (C#)
- 4.2 Display all Cookie (C#)
- 4.3 Getting cookie values in ASP.NET
- 4.4 Save and retrieve values in Cookie (C#)
- 4.5 Save Cookie (Vb.net)
- 4.6 Set cookie expire date (VB.net)
- 4.7 Setting a Cookie (VB.net)
- 4.8 Setting expire date and path for cookies in ASP.NET (VHB.net)
- 4.9 Write Cookie and read Cookie (VB.net)
Adding cache dependencies (VB.net)
<source lang="csharp">
<%@ Page Language="vb" %> <%@ OutputCache Duration="300" VaryByParam="None" %> <html>
<head> <title>Adding cache dependencies in ASP.NET</title> <script runat="server"> Sub Page_Load() Dim myArrayList As New ArrayList myArrayList.Add("Key1") myArrayList.Add("Key2") Response.AddCacheItemDependencies(myArrayList) Message.Text = DateTime.Now() End Sub Sub Button1_Click(sender As Object, e As EventArgs) Cache("Key1") = "value for key1" End Sub Sub Button2_Click(sender As Object, e As EventArgs) Cache("Key2") = "value for key2" End Sub </script> </head>
<body>
<form runat="server"> <asp:label id="Message" runat="server"/> <asp:button id="Button1" text="Change Key 1" onClick="Button1_Click" runat="server"/> <asp:button id="Button2" text="Change Key 2" onClick="Button2_Click" runat="server"/> </form>
</body> </html>
</source>
Create and retrieve Cookie data (C#)
<source lang="csharp">
<%@ Page language="c#" src="CookieExample.aspx.cs" AutoEventWireup="false" Inherits="YourNamespace.CookieExample" %> <HTML>
<body> <form id="Form1" method="post" runat="server"> <asp:Label id="lblWelcome" style="Z-INDEX: 100; LEFT: 16px; POSITION: absolute; TOP: 24px" runat="server" Width="412px" Height="130px" BackColor="LightYellow" Font-Size="Medium" Font-Names="Verdana" BorderWidth="2px" BorderStyle="Groove"></asp:Label> <asp:Button id="Button1" style="Z-INDEX: 105; LEFT: 288px; POSITION: absolute; TOP: 264px" runat="server" Width="137px" Text="Submit Page"></asp:Button> <asp:TextBox id="txtName" style="Z-INDEX: 101; LEFT: 96px; POSITION: absolute; TOP: 200px" runat="server" Width="184px" Height="24px"></asp:TextBox> <asp:Button id="cmdStore" style="Z-INDEX: 103; LEFT: 288px; POSITION: absolute; TOP: 200px" runat="server" Width="137px" Text="Create Cookie"></asp:Button> <asp:Label id="Label1" style="Z-INDEX: 104; LEFT: 24px; POSITION: absolute; TOP: 204px" runat="server" Width="56px" Height="16px" Font-Size="X-Small" Font-Names="Verdana">Name:</asp:Label> </form> </body>
</HTML> <%-- using System; using System.Collections; using System.ruponentModel; using System.Data; using System.Drawing; using System.Web; using System.Web.SessionState; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.HtmlControls; using System.Net; namespace YourNamespace {
/// <summary> /// Summary description for CookieExample. /// </summary> public class CookieExample : System.Web.UI.Page { protected System.Web.UI.WebControls.Label lblWelcome; protected System.Web.UI.WebControls.TextBox txtName; protected System.Web.UI.WebControls.Button cmdStore; protected System.Web.UI.WebControls.Button Button1; protected System.Web.UI.WebControls.Label Label1; private void Page_Load(object sender, System.EventArgs e) { HttpCookie cookie = Request.Cookies["Preferences"]; if (cookie == null) { lblWelcome.Text = "Unknown Customer"; } else { lblWelcome.Text = "Cookie Found.
"; lblWelcome.Text += "Welcome, " + cookie["Name"]; } } #region Web Form Designer generated code override protected void OnInit(EventArgs e) { // // CODEGEN: This call is required by the ASP.NET Web Form Designer. // InitializeComponent(); base.OnInit(e); } /// <summary> /// Required method for Designer support - do not modify /// the contents of this method with the code editor. /// </summary> private void InitializeComponent() { this.cmdStore.Click += new System.EventHandler(this.cmdStore_Click); this.Load += new System.EventHandler(this.Page_Load); } #endregion private void cmdStore_Click(object sender, System.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>
Delete All Cookies (C#)
<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() { string[] cookies = Request.Cookies.AllKeys; foreach (string cookie in cookies) { BulletedList1.Items.Add("Deleting " + cookie); Response.Cookies[cookie].Expires = DateTime.Now.AddDays(-1); } }
</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">
<title>Delete All Cookies</title>
</head> <body>
<form id="form1" runat="server">
Delete All Cookies
<asp:BulletedList id="BulletedList1" EnableViewState="false" Runat="server" />
</form>
</body> </html>
</source>
Delete Cookie (C#)
<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">
protected void btnDelete_Click(object sender, EventArgs e) { Response.Cookies[txtCookieName.Text].Expires = DateTime.Now.AddDays(-1); }
</script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">
<title>Delete Cookie</title>
</head> <body>
<form id="form1" runat="server">
<asp:Label id="lblCookieName" Text="Cookie Name:" AssociatedControlID="txtCookieName" Runat="server" /> <asp:TextBox id="txtCookieName" Runat="server" /> <asp:Button id="btnDelete" Text="Delete Cookie" OnClick="btnDelete_Click" Runat="server" />
</form>
</body> </html>
</source>
Display all Cookie (C#)
<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>
Getting cookie values in ASP.NET
<source lang="csharp">
<%@ Page Language="vb" %> <html>
<head> <title>Getting cookie values in ASP.NET</title> </head>
<body>
<%
Dim Counter1, Counter2 As Integer
Dim Keys(), SubKeys() As String
Dim CookieColl As HttpCookieCollection
Dim Cookie As HttpCookie
Dim Expires As DateTime
CookieColl = Request.Cookies
Keys = CookieColl.AllKeys
For Counter1 = 0 To Keys.GetUpperBound(0)
Cookie = CookieColl(Keys(Counter1))
Response.Write("Cookie: " & Cookie.Name & "
")
Expires = Cookie.Expires
Response.Write("Expires: " & Expires & "
")
SubKeys = Cookie.Values.AllKeys
For Counter2 = 0 To SubKeys.GetUpperBound(0)
Response.Write("Key " & CStr(Counter2) + ": " & SubKeys(Counter2) & "
")
Response.Write("Value " & CStr(Counter2) + ": " & Cookie.Values(Counter2) & "
")
Next Counter2
Next Counter1
%>
</body> </html>
</source>
Save and retrieve values in Cookie (C#)
<source lang="csharp">
<%@ Page Language="c#" %> <script Language="c#" runat="server">
void Page_Load(object source, EventArgs e) { if (!(IsPostBack)) { MyButton.Text = "Save Cookie"; MyDropDownList.Items.Add("Blue"); MyDropDownList.Items.Add("Red"); MyDropDownList.Items.Add("Gray"); } } public void Click(object sender, EventArgs e) { HttpCookie MyCookie = new HttpCookie("Background"); MyCookie.Value = MyDropDownList.SelectedItem.Text; Response.Cookies.Add(MyCookie); }
</script> <html>
<body> <form id="CookieForm" method="post" runat="server"> <asp:DropDownList id=MyDropDownList runat="server"/> <asp:button id=MyButton runat="server" OnClick="Click"/> </form> </body>
</html>
///////////////////////////////////////////////////
<%@ Page Language="c#" %>
<script Language="c#" runat="server"> void Page_Load(object source, EventArgs e) { Response.Cache.SetExpires(DateTime.Now); } string GetBackground() { return Request.Cookies["Background"].Value; } </script> <html> <body bgcolor="<% Response.Write(GetBackground()); %>"> <asp:label id="message" runat="server" /> </body> </html> </source>
Save Cookie (Vb.net)
<source lang="csharp">
<%@ Page Language="VB" %>
<script language="vb" runat="server"> Sub Page_Load(Source As Object, E as EventArgs) If Not IsPostBack Then MyButton.Text = "Save Cookie" MyDropDownList.Items.Add("Blue") MyDropDownList.Items.Add("Red") MyDropDownList.Items.Add("Gray") End If End Sub Public Sub Click(ByVal sender As Object, ByVal e As System.EventArgs) Dim MyCookie As New HttpCookie("Background") MyCookie.Value = MyDropDownList.SelectedItem.Text Response.Cookies.Add(MyCookie) End Sub </script>
<html>
<body> <form id="CookieForm" method="post" runat="server"> <asp:DropDownList id=MyDropDownList runat="server"/> <asp:button id=MyButton runat="server" OnClick="Click"/> </form> </body>
</html>
////////////////////////////////////////////////////////// // Get saved Cookies <%@ Page Language="VB" %>
<script language="vb" runat="server"> Sub Page_Load(Source As Object, E as EventArgs) Response.Cache.SetExpires(DateTime.Now) End Sub </script> <html> <body bgcolor="<%=Request.Cookies("Background").Value%>"> </body> </html>
</source>
Set cookie expire date (VB.net)
<source lang="csharp">
<%@ Page Language="VB" %>
<script language="vb" runat="server"> Sub Page_Load(Source As Object, E as EventArgs) If Not IsPostBack Then MyButton.Text = "Save Cookie" MyDropDownList.Items.Add("Blue") MyDropDownList.Items.Add("Red") MyDropDownList.Items.Add("Gray") End If End Sub Public Sub Click(ByVal sender As Object, ByVal e As System.EventArgs) Dim MyCookie As New HttpCookie("Background") MyCookie.Value = MyDropDownList.SelectedItem.Text Response.Cookies.Add(MyCookie) End Sub </script>
<html>
<body> <form id="CookieForm" method="post" runat="server"> <asp:DropDownList id=MyDropDownList runat="server"/> <asp:button id=MyButton runat="server" OnClick="Click"/> </form> </body>
</html>
//////////////////////////////////////////////////////////
<%@ Page Language="VB" %>
<script language="vb" runat="server"> Sub Page_Load(Source As Object, E as EventArgs) Response.Cache.SetExpires(DateTime.Now) End Sub </script> <html> <body bgcolor="<%=Request.Cookies("Background").Value%>"> </body> </html>
</source>
Setting a Cookie (VB.net)
<source lang="csharp">
<%@ Page Language="vb" %> <html>
<head> <title>Setting a Cookie in ASP.NET</title> <script runat="server"> Sub Page_Load() Dim myCookie As New HttpCookie("LoggedIn") myCookie.Value = "True" myCookie.Expires = DateTime.Now.AddMinutes(30) Response.Cookies.Add(myCookie) End Sub </script> </head>
<body>
<asp:label id="Message" runat="server"/>
</body> </html>
</source>
Setting expire date and path for cookies in ASP.NET (VHB.net)
<source lang="csharp">
<%@ Page Language="vb" %> <html>
<head> <title>Setting cookies in ASP.NET</title> </head>
<body>
<% Dim Cookie1 As New HttpCookie("Cookie1") Dim Cookie2 As New HttpCookie("Cookie2") Dim ExpiryDate As DateTime = DateTime.Now() ExpiryDate = ExpiryDate.AddHours(1) Cookie1.Value = "Cookie from nfex.ru" Cookie1.Expires = ExpiryDate Cookie1.Path = "/" Cookie2.Values("V1") = "1" Cookie2.Values("V2") = "2" Cookie2.Values("V3") = "3" Cookie2.Expires = ExpiryDate Cookie2.Path = "/" Response.Cookies.Add(Cookie1) Response.Cookies.Add(Cookie2) Response.Write("Cookies written") %>
</body> </html>
</source>
Write Cookie and read Cookie (VB.net)
<source lang="csharp">
<%@ Page Language=VB Debug=true %> <script runat=server> Sub SubmitBtnWrite_Click(Sender As Object, E As EventArgs)
Response.Cookies("TestCookie1").Expires = "5/1/2010" Response.Cookies("TestCookie1").Value = _ "The cookie stuff." Response.Cookies("TestCookie2").Expires = "5/1/2010" Response.Cookies("TestCookie2").Value = _ "More cookie stuff."
End Sub Sub SubmitBtnRead_Click(Sender As Object, E As EventArgs)
Dim I as integer For I = 0 to Request.Cookies.Count - 1 lblMessage1.Text = lblMessage1.Text _ & Request.Cookies.Item(I).Name & ": " _ & Request.Cookies.Item(I).Value & "
" Next
End Sub </SCRIPT> <HTML> <HEAD> <TITLE>Cookies Sample Page</TITLE> </HEAD> <BODY > <form runat="server"> <asp:Label
id="lblMessage1" runat="Server" Font-Bold="True"
/>
<asp:button
id="butOK1" runat="server" text="Write Cookies to Browser" Type="Submit" OnClick="SubmitBtnWrite_Click"
/> <asp:button
id="butOK2" runat="server" text="Read Cookies from Browser" Type="Submit" OnClick="SubmitBtnRead_Click"
/> </Form> </BODY> </HTML>
</source>