需要注意HttpOnly,Path等属性。完整的测试代码：
ASPX 代码
<%@ 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 Page_Load(object sender, EventArgs e)
{
if (!Page.IsPostBack)
{
HttpCookie Cookie = new HttpCookie("user");
Cookie.Values.Add("name", "mxh");
Cookie.Values.Add("id", "net_lover");
Cookie.Expires = DateTime.Now.AddDays(1);
Cookie.HttpOnly = false;
Cookie.Path = "/";
Response.Cookies.Add(Cookie);
}
}
protected void Button1_Click(object sender, EventArgs e)
{
if (Request.Cookies["user"] == null)
{
Response.Write("已经删除");
}
else
{
Response.Write("Cookie值： " + Request.Cookies["user"]["name"]);
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>dotnet.aspx.cc Cookie 测试</title>
<script type="text/javascript">
function deleteCookie() {
var expires = new Date();
expires.setUTCFullYear(expires.getUTCFullYear() - 1);
document.cookie = "user=name=&id=; expires=" + expires.toUTCString() + "; path=/";
}
</script>
</head>
<body>
<form id="form1" runat="server">
<input type="button" value="删除" onclick="deleteCookie()" />
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="查看Cookie" />
</form>
</body>
</html>
作者：孟宪会