C#中Cookies的存取

c#中cookies的存取操作

c#中cookies的存取

cookies的创建:

在客户端创建一个username的cookies,其值为gjy,有效期为1天.

方法1:

Response.Cookies["username"].Value="zxf";

Response.Cookies["username"].Expires=DateTime.Now.AddDays(1);

方法2:

System.Web.HttpCookie newcookie=new HttpCookie("username");

newcookie.Value="gjy";

newcookie.Expires=DateTime.Now.AddDays(1);

Response.AppendCookie(newcookie);

创建带有子键的cookies:

System.Web.HttpCookie newcookie=new HttpCookie("user");

newcookie.Values["username"]="zxf";

newcookie.Values["password"]="111";

newcookie.Expires=DateTime.Now.AddDays(1);

Response.AppendCookie(newcookie);

cookies的读取:

无子键读取:

if(Request.Cookies["username"]!=null)

{

Response.Write(Server.HtmlEncode(Request.Cookies["username"].Value));

}

有子键读取:

if(Request.Cookies["user"]!=null)

{

Response.Write(Server.HtmlEncode(Request.Cookies["user"]["username"].Value));

Response.Write(Server.HtmlEncode(Request.Cookies["user"]["password"].Value));

using System;

using System.Data;

using System.Configuration;

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 class Cookie

{

/// <summary>

/// Cookies赋值

/// </summary>

/// <param name="strName">主键</param>

/// <param name="strValue">键值</param>

/// <param name="strDay">有效天数</param>

/// <returns></returns>

public bool setCookie(string strName, string strValue, int strDay)

{

try

{

HttpCookie Cookie = new HttpCookie(strName);

//Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com

Cookie.Expires = DateTime.Now.AddDays(strDay);

Cookie.Value = strValue;

System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);

return true;

}

catch

{

return false;

}

}

/// <summary>

/// 读取Cookies

/// </summary>

/// <param name="strName">主键</param>

/// <returns></returns>

public string getCookie(string strName)

{

HttpCookie Cookie = System.Web.HttpContext.Current.Request.Cookies[strName];

if (Cookie != null)

{

return Cookie.Value.ToString();

}

else

{

return null;

}

}

/// <summary>

/// 删除Cookies

/// </summary>

/// <param name="strName">主键</param>

/// <returns></returns>

public bool delCookie(string strName)

{

try

{

HttpCookie Cookie = new HttpCookie(strName);

//Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com

Cookie.Expires = DateTime.Now.AddDays(-1);

System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);

return true;

}

catch

{

return false;

}

}

}

示例：

Cookie Cookie = new Cookie();

Cookie.setCookie("name", "aaa",1);//赋值

Cookie.getCookie("name");//取值

Cookie.delCookie("name");//删除

注意:当Cookie存中文出现乱码,则在存放时给中文编码,如Cookie.setCookie("name", Server.UrlEncode("aaa"),1),读取时解码即可

另外：只要不给cookie设置过期时间,cookie在浏览器关闭的时候自动失效

using System;

using System.Data;

using System.Configuration;

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 class Cookie

{

/// <summary>

/// Cookies赋值

/// </summary>

/// <param name="strName">主键</param>

/// <param name="strValue">键值</param>

/// <param name="strDay">有效天数</param>

/// <returns></returns>

public bool setCookie(string strName, string strValue, int strDay)

{

try

{

HttpCookie Cookie = new HttpCookie(strName);

//Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com

Cookie.Expires = DateTime.Now.AddDays(strDay);

Cookie.Value = strValue;

System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);

return true;

}

catch

{

return false;

}

}

/// <summary>

/// 读取Cookies

/// </summary>

/// <param name="strName">主键</param>

/// <returns></returns>

public string getCookie(string strName)

{

HttpCookie Cookie = System.Web.HttpContext.Current.Request.Cookies[strName];

if (Cookie != null)

{

return Cookie.Value.ToString();

}

else

{

return null;

}

}

/// <summary>

/// 删除Cookies

/// </summary>

/// <param name="strName">主键</param>

/// <returns></returns>

public bool delCookie(string strName)

{

try

{

HttpCookie Cookie = new HttpCookie(strName);

//Cookie.Domain = ".xxx.com";//当要跨域名访问的时候,给cookie指定域名即可,格式为.xxx.com

Cookie.Expires = DateTime.Now.AddDays(-1);

System.Web.HttpContext.Current.Response.Cookies.Add(Cookie);

return true;

}

catch

{

return false;

}

}

}

示例：

Cookie Cookie = new Cookie();

Cookie.setCookie("name", "aaa",1);//赋值

Cookie.getCookie("name");//取值

Cookie.delCookie("name");//删除

注意:当Cookie存中文出现乱码,则在存放时给中文编码,如Cookie.setCookie("name", Server.UrlEncode("aaa"),1),读取时解码即可

另外：只要不给cookie设置过期时间,cookie在浏览器关闭的时候自动失效