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分享这样写入的cookies如何注销
Response.Cookies["username"].Value = username.Value.Trim();
Response.Cookies["username"].Expires = DateTime.Now.AddDays(1);
Response.Cookies["userid"].Value = u.fn登录(username.Value, userpass.Value).Tables[0].Rows[0]["userid"].ToString();
Response.Cookies["userid"].Expires = DateTime.Now.AddDays(1);
这样写入的cookies如何注销
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阿非 2009-12-26
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哦，自己看到了。
阿非 2009-12-26
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<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="btnShow" runat="server" Text="显示cookie [Name]"
onclick="btnShow_Click" />
<asp:Button ID="btnSet" runat="server" Text="设置cookie [Name]"
onclick="btnSet_Click" />
<asp:Button ID="btnDel" runat="server" Text="删除cookie [Name]"
onclick="btnDel_Click" />
</div>
</form>
</body>
</html>
protected void btnShow_Click(object sender, EventArgs e)
{
if (Request.Cookies["Name"] == null)
{
Response.Write("Cookies[Name] 不存在");
}
else
{
Response.Write(string.Format("Cookies[Name]:{0}", Request.Cookies["Name"].Value));
}
}
protected void btnSet_Click(object sender, EventArgs e)
{
if (Request.Cookies["Name"] == null)
{
HttpCookie hc = new HttpCookie("Name", "Sandy");
hc.Expires = DateTime.Now.AddDays(1);
Response.Cookies.Add(hc);
}
else
{
Response.Cookies["Name"].Value = "Sandy";
Response.Cookies["Name"].Expires = DateTime.Now.AddDays(1);
}
}
protected void btnDel_Click(object sender, EventArgs e)
{
if (Request.Cookies["Name"] != null)
{
Response.Cookies["Name"].Expires = DateTime.Now.AddDays(-1);
}
}
阿非 2009-12-26
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Request.Cookies["jwj"].Expires = DateTime.Now.AddDays(-1);
=》
Response.Cookies["jwj"].Expires = DateTime.Now.AddDays(-1);
=》
Response.Cookies["jwj"].Expires = DateTime.Now.AddDays(-1);
plglenn14 2009-12-26
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[Quote=引用 6 楼 zengzhan 的回复:]
例子：
C# codeif (Session["admin"]!=null)
{
Session["admin"]=null;
}
Response.Redirect("logini.aspx");
[/Quote]
cookies 好不？
例子：
C# codeif (Session["admin"]!=null)
{
Session["admin"]=null;
}
Response.Redirect("logini.aspx");
[/Quote]
cookies 好不？
qqzeng-ip 2009-12-26
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例子：
if (Session["admin"] != null)
{
Session["admin"] = null;
}
Response.Redirect("logini.aspx");
silentwins 2009-12-26
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protected void Page_Load(object sender, EventArgs e)
{
Response.Cookies["UserSetting"].Value = "aaaaaaa"; //断点1
Request.Cookies["UserSetting"].Expires = DateTime.Now.AddDays(1);
}
protected void Button1_Click(object sender, EventArgs e)
{
Response.Cookies["UserSetting"].Value = null;
} //断点2这样子是可以的，第一次进入页面，给Cookies赋值
然后点击按钮1，把值设置为空，停在断点2，这时Cookies的值确实还存在
但当再一次进入这个页面的Page_Load时，例如刷新、按按钮等等，这是停在断点1，Cookies的值已经消失了
至于其原理，有待研究...
plglenn14 2009-12-26
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[Quote=引用 3 楼 sandy945 的回复:]
等会我写个DEMO
[/Quote]
不用了
Request=>Response
等会我写个DEMO
[/Quote]
不用了
Request=>Response
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Response.Cookies["username"].Expires = DateTime.Now.AddDays(-1);
Response.Cookies["userid"].Expires = DateTime.Now.AddDays(-1);
Response.Cookies["username"].Value = "cc";
Request.Cookies["jwj"].Expires = DateTime.Now.AddDays(-1);
// Response.Redirect(Request.RawUrl);
}
}阿非 2009-12-26
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等会我写个DEMO
plglenn14 2009-12-26
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登录：
注销：
protected void btnOk_serverclick(object sender, EventArgs e)
{
xl_user u = new xl_user();
if (u.fn登录(username.Value, userpass.Value).Tables[0].Rows.Count > 0)
{
Response.Cookies["username"].Value = username.Value.Trim();
Response.Cookies["username"].Expires = DateTime.Now.AddDays(1);
Response.Cookies["userid"].Value = u.fn登录(username.Value, userpass.Value).Tables[0].Rows[0]["userid"].ToString();
Response.Cookies["userid"].Expires = DateTime.Now.AddDays(1);
Response.Cookies["jwj"].Value = "jinwanjun";
Response.Cookies["jwj"].Expires = DateTime.Now.AddDays(1);
Response.Redirect("manage.aspx");
}
else
{
Response.Write("<script>alert('用户名或密码错误！');</script>");
}
}注销：
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
Request.Cookies["username"].Expires = DateTime.Now.AddDays(-1);
Request.Cookies["userid"].Expires = DateTime.Now.AddDays(-1);
Request.Cookies["username"].Value ="cc";
Request.Cookies["jwj"].Expires = DateTime.Now.AddDays(-1);
// Response.Redirect(Request.RawUrl);
}
}
plglenn14 2009-12-26
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这样写是不是有问题，无法注销啊？？？？？？？？？？？？？？？？？？？？？？？
