asp.net删除cookie

退出

//删除cookie
function returnCookie()
{
$.ajax({
type: "post",
dataType: "text",
url: "ashx/logo.ashx",
data: "our=退出",
success: function (msg)
{
if (msg == "True")
{
window.location.href = "logo.aspx";
}
}
});
}
一般处理程序写
if (our == "退出")
{
if (context.Request.Cookies["user100"] != null && context.Request.Cookies["user100"].Value != "")
{
try
{
context.Response.Cookies["user100"].Value = null;
context.Response.Cookies["user100"].Expires = DateTime.Now.AddDays(-1);
HttpCookie cookie = new HttpCookie("user100", null);
cookie.Expires = DateTime.Now.AddDays(-10);
context.Response.Cookies.Add(cookie);
context.Response.Write("True");
}
catch (Exception er)
{
throw er;
}
}
}