Cookie存、取，使用方法实例代码,Asp.Net代码库,德仔网

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【Asp.Net】 Cookie存、取，使用方法实例
作者:Dezai.CN / 发布于2013/3/7/ 732
Cookie存、取，使用方法实例

	1，CookiesWriter 页面，实现点击按钮存cookie ；

	using System;
	using System.Collections;
	using System.Configuration;
	using System.Data;
	using System.Linq;
	using System.Web;
	using System.Web.Security;
	using System.Web.UI;
	using System.Web.UI.HtmlControls;
	using System.Web.UI.WebControls;
	using System.Web.UI.WebControls.WebParts;
	using System.Xml.Linq;

	public partial class _20110328Cookies_CookiesWriter : System.Web.UI.Page
	{
	 protected void Page_Load(object sender, EventArgs e)
	 {

	 }
	 public void setCookiesForUser()
	 {
	 HttpCookie cookie = new HttpCookie("XXH_CookiesInfo");
	 cookie.Values.Add("xxh", this.txtCookies.Text.Trim() + System.DateTime.Now.ToString());
	 cookie.Expires = System.DateTime.Now.AddDays(1); //设置Cookies失效时间
	 Response.Cookies.Add(cookie);
	 }
	 protected void btnAddCookies_Click(object sender, EventArgs e)
	 {
	 setCookiesForUser();
	 Response.Redirect("CookiesReader.aspx");
	 }
	}
	2，CookiesReader页面，实现读取cookie ；

	using System;
	using System.Collections;
	using System.Configuration;
	using System.Data;
	using System.Linq;
	using System.Web;
	using System.Web.Security;
	using System.Web.UI;
	using System.Web.UI.HtmlControls;
	using System.Web.UI.WebControls;
	using System.Web.UI.WebControls.WebParts;
	using System.Xml.Linq;

	public partial class _20110328Cookies_CookiesReader : System.Web.UI.Page
	{
	 protected void Page_Load(object sender, EventArgs e)
	 {
	 if (!this.Page.IsPostBack)
	 {
	 getCookies();
	 }
	 }
	 public void getCookies()
	 {
	 HttpCookie cookie = Request.Cookies["XXH_CookiesInfo"];
	 if (cookie == null)
	 {
	 return;
	 }
	 else
	 {
	 if (cookie.Values.Count > 0)
	 {
	 string userInfo = cookie.Values["xxh"];
	 Response.Write(userInfo);
	
	 //遍历每一个Cookies值
	 Response.Write("下面是遍历Cookies里的每一个值:");
	 string[] sArray = userInfo.Split(',');
	 foreach (string i in sArray)
	 {
	 Response.Write(i.ToString() + "");
	 }
	 }
	 else
	 {
	 Response.Write(cookie.Name+"Cookies记录为空值");
	 }
	 }
	 }
	}
	3，CookiesWriter3存储同名连续的cookie 值

	using System;
	using System.Collections;
	using System.Configuration;
	using System.Data;
	using System.Linq;
	using System.Web;
	using System.Web.Security;
	using System.Web.UI;
	using System.Web.UI.HtmlControls;
	using System.Web.UI.WebControls;
	using System.Web.UI.WebControls.WebParts;
	using System.Xml.Linq;
	using System.Data.SqlClient;

	public partial class _20110328Cookies_CookiesWriter3 : System.Web.UI.Page
	{
	 protected void Page_Load(object sender, EventArgs e)
	 {
	 if (!this.Page.IsPostBack)
	 {
	 ddlUsersListDataBind();
	 }
	 }
	 public void ddlUsersListDataBind()
	 {
	 string connection = ConfigurationManager.ConnectionStrings["connectionXXH_LogManager"].ConnectionString;
	 string sql = "SELECT * FROM UsersInfo";
	 SqlConnection con = new SqlConnection(connection);
	 SqlDataAdapter sda = new SqlDataAdapter(sql, con);
	 DataSet ds = new DataSet();
	 sda.Fill(ds);
	 ddlUsersList.DataSource = ds;
	 ddlUsersList.DataTextField = "UserName";
	 ddlUsersList.DataValueField = "UserID";
	 ddlUsersList.DataBind();
	 }
	 protected void ddlUsersList_SelectedIndexChanged(object sender, EventArgs e)
	 {
	 setCookiesForUsers();
	 }

	 public void setCookiesForUsers() //获取原有的Cookies记录内容
	 {
	 HttpCookie cookies = Request.Cookies["XXH_CookiesUserInfo"];
	 if (cookies == null) // || cookies.Values.Count == 0
	 {
	 cookies = new HttpCookie("XXH_CookiesUserInfo");
	 cookies.Values.Add("user", ddlUsersList.SelectedValue);
	 cookies.Expires = System.DateTime.MaxValue; //设置Cookies失效时间
	 Response.Cookies.Add(cookies);
	 Response.Write("<script language='javascript' defer>alert('首次添加" + ddlUsersList.SelectedItem.Value + "到Cookies成功');</script>");
	 }
	 else
	 {
	 if (cookies.Values["user"] != "")
	 {
	 string cookPre = Convert.ToString(cookies.Values["user"]);
	 cookies.Values.Set("user", (cookPre + "," + ddlUsersList.SelectedValue)); //修改cookies.Values["user"]值
	 cookies.Expires = System.DateTime.MaxValue; //设置Cookies失效时间
	 Response.AppendCookie(cookies);
	 Response.Write("<script language='javascript' defer>alert('自动添加" + ddlUsersList.SelectedItem.Value + "到Cookies成功');</script>");
	 }
	 }
	 }
	}
	4，读取连续的cookie 值，并根据id显示相关内容

	using System;
	using System.Collections;
	using System.Configuration;
	using System.Data;
	using System.Linq;
	using System.Web;
	using System.Web.Security;
	using System.Web.UI;
	using System.Web.UI.HtmlControls;
	using System.Web.UI.WebControls;
	using System.Web.UI.WebControls.WebParts;
	using System.Xml.Linq;
	using System.Data.SqlClient;

	public partial class _20110328Cookies_CookiesReaderByID : System.Web.UI.Page
	{
	 protected void Page_Load(object sender, EventArgs e)
	 {
	 if (!this.Page.IsPostBack)
	 {
	 getCookies();
	 }
	 }
	 public void getCookies()
	 {
	 HttpCookie cookie = Request.Cookies["XXH_CookiesUserInfo"];
	 if (cookie == null)
	 {
	 return;
	 }
	 else
	 {
	 if (cookie.Values.Count > 0)
	 {
	 string userInfo = cookie.Values["user"];
	 Response.Write(userInfo);

	 //遍历每一个Cookies值
	 Response.Write("下面是遍历Cookies里的每一个值:");
	 string[] sArray = userInfo.Split(',');
	 foreach (string i in sArray)
	 {
	 Response.Write(i.ToString() + "");
	 getUserInfoByID(Convert.ToInt32(i));
	 }
	 }
	 else
	 {
	 Response.Write(cookie.Name + "Cookies记录为空值");
	 }
	 }
	 }
	 public void getUserInfoByID(int ID)
	 {
	 string connection = ConfigurationManager.ConnectionStrings["connectionXXH_LogManager"].ConnectionString;
	 string sql = "SELECT * FROM UsersInfo WHERE UserID=" + ID + "";
	 SqlConnection con = new SqlConnection(connection);
	 SqlDataAdapter sda = new SqlDataAdapter(sql, con);
	 DataSet ds = new DataSet();
	 sda.Fill(ds);
	 if (ds.Tables[0].Rows.Count > 0)
	 {
	 Response.Write("用户信息：ID=" + ID + "用户名=" + Convert.ToString(ds.Tables[0].Rows[0]["UserName"]) + "生日=" + Convert.ToString(ds.Tables[0].Rows[0]["Birthday"]) + "");
	 }
	 else
	 {
	 Response.Write("<script language='javascript' defer>alert('没有找到用户信息！');</script>");
	 }
	 }
	}

	5，用JS存Cookies练习实例

	<%@ Page Language="C#" AutoEventWireup="true" CodeFile="CookiesWriterJS.aspx.cs" Inherits="_20110328Cookies_CookiesWriterJS" %>

	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

	<html xmlns="http://www.w3.org/1999/xhtml">
	<head runat="server">
	 <title>用JS存Cookies练习</title>
	<script type="text/javascript" language="javascript">
	//添加cookie
	function addCookie(objName,objValue,objHours){//debugger;
	 var str = objName + "=" + escape(objValue);
	 //为0时不设定过期时间，浏览器关闭时cookie自动消失
	 if(objHours > 0){
	 var date = new Date();
	 var ms = objHours*3600*1000;
	 date.setTime(date.getTime() + ms);
	 str += "; expires=" + date.toGMTString();
	 }
	 document.cookie = str;
	 alert("添加cookie成功");
	}
	//获取指定名称的cookie的值
	function getCookie(objName){//debugger;
	 var arrStr = document.cookie.split("; ");
	 for(var i = 0;i < arrStr.length;i ++){
	 var temp = arrStr[i].split("=");
	 if(temp[0] == objName)
	 {
	 return unescape(temp[1]);//返回一个包含charstring内容的字符串值
	 }
	 }
	}
	//为了删除指定名称的cookie，可以将其过期时间设定为一个过去的时间
	function delCookie(objName){//debugger;
	 var date = new Date();
	 date.setTime(date.getTime() - 10000);
	 document.cookie = objName + "=a; expires=" + date.toGMTString();
	}
	//读取所有保存的cookie字符串
	function allCookie(){
	 var str = document.cookie;
	 if(str == ""){
	 str = "没有保存任何cookie";
	 }
	 alert(str);
	}
	//找文档表单m内部控件n
	function $(m,n){//debugger;
	 return document.forms[m].elements[n].value;
	}
	function add_(){
	 var cookie_name = $("myform","cookie_name");
	 var cookie_value = $("myform","cookie_value");
	 var cookie_expireHours = $("myform","cookie_expiresHours");
	 addCookie(cookie_name,cookie_value,cookie_expireHours);
	}

	function get_(){
	 var cookie_name = $("myform","cookie_name");
	 var cookie_value = getCookie(cookie_name);
	 alert(cookie_value);
	}

	function del_(){
	 var cookie_name = $("myform","cookie_name");
	 delCookie(cookie_name);
	 alert("删除成功");
	}

	</script>
	</head>
	<body>
	 <form name="myform" runat="server">
	 <div><label for="cookie_name">名称</label><input type="text" name="cookie_name" /></div>
	 <div><label for="cookie_value">值</label><input type="text" name="cookie_value" /></div>
	 <div><label for="cookie_expireHours">多少个小时过期</label><input type="text" name="cookie_expiresHours" /></div>
	 <div>
	 <input type="button" value="添加该cookie" onclick="add_()" />
	 <input type="button" value="读取所有cookie" onclick="allCookie()" />
	 <input type="button" value="读取该名称cookie" onclick="get_()" />
	 <input type="button" value="删除该名称cookie" onclick="del_()" />
	 </div>
	</form>
	</body>
	</html>
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