c#.net与vb.net中读写Cookie的方法！

Cookie (HttpCookie的实例)提供了一种在 Web 应用程序中存储用户特定信息的方法。例如，当用户访问您的站点时，您可以使用 Cookie 存储用户首选项或其他信息。当该用户再次访问您的网站时，应用程序便可以检索以前存储的信息。

C#.net部分

创建Cookie方法 (1)

Response.Cookies["userName"].Value = “admin";
Response.Cookies[“userName”].Expires = DateTime.Now.AddDays(1);

//如果不设置失效时间,Cookie信息不会写到用户硬盘,浏览器关闭将会丢弃。

创建Cookie方法 (2)

HttpCookie aCookie = new HttpCookie(“lastVisit”); //上一次访问时间
aCookie.Value = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);
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访问Cookie方法(1)

if(Request.Cookies["userName"] != null)
Label1.Text = Server.HtmlEncode(Request.Cookies["userName"].Value);访问Cookie方法(2)
if(Request.Cookies["userName"] != null)
{
HttpCookie aCookie = Request.Cookies["userName"];
Label1.Text = Server.HtmlEncode(aCookie.Value);
}
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创建多值Cookie方法 (1)

Response.Cookies["userInfo"]["userName"] = “admin";
Response.Cookies["userInfo"]["lastVisit"] = DateTime.Now.ToString();
Response.Cookies["userInfo"].Expires = DateTime.Now.AddDays(1);
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创建多值Cookie方法 (2)

HttpCookie aCookie = new HttpCookie("userInfo");
aCookie.Values["userName"] = “admin";
aCookie.Values["lastVisit"] = DateTime.Now.ToString();
aCookie.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(aCookie);
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读取多值Cookie

HttpCookie aCookie = Request.Cookies["userInfo"];
string userName=aCookie.Values[“userName”];
string lastVisit=aCookie.Values[“lastVisit”];
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vb.net部分

创建Cookie方法 (1)

Response.Cookies("userName").Value = “admin"
Response.Cookies(“userName”).Expires = DateTime.Now.AddDays(1)

'如果不设置失效时间,Cookie信息不会写到用户硬盘,浏览器关闭将会丢弃。

创建Cookie方法 (2)

Dim aCookie As HttpCookie =  New HttpCookie(“lastVisit”)  '上一次访问时间
aCookie.Value = DateTime.Now.ToString()
aCookie.Expires = DateTime.Now.AddDays(1)
Response.Cookies.Add(aCookie)
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访问Cookie方法(1)

If Not Request.Cookies("userName") Is Nothing Then
Label1.Text = Server.HtmlEncode(Request.Cookies("userName").Value)访问Cookie方法(2)
End If
If Not Request.Cookies("userName") Is Nothing Then
Dim aCookie As HttpCookie =  Request.Cookies("userName")
Label1.Text = Server.HtmlEncode(aCookie.Value)
End If
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创建多值Cookie方法 (1)

Response.Cookies("userInfo")("userName") = “admin"
Response.Cookies("userInfo")("lastVisit") = DateTime.Now.ToString()
Response.Cookies("userInfo").Expires = DateTime.Now.AddDays(1)
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创建多值Cookie方法 (2)

Dim aCookie As HttpCookie =  New HttpCookie("userInfo")
aCookie.Values("userName") = “admin"
aCookie.Values("lastVisit") = DateTime.Now.ToString()
aCookie.Expires = DateTime.Now.AddDays(1)
Response.Cookies.Add(aCookie)
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读取多值Cookie

Dim aCookie As HttpCookie =  Request.Cookies("userInfo")
Dim userName As String = aCookie.Values(“userName”)
Dim lastVisit As String = aCookie.Values(“lastVisit”)
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修改和删除Cookie

不能直接修改或删除Cookie,只能创建一个新vb.net教程的Cookie,发送到客户端以实现修改或删除Cookie.

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