清除会话变量值 [英] Clear session variable value

问题描述

我想在注销事件中清除会话变量值.但它行不通.
代码在这里

I want to clear session varibale value in logout event. but it won''t works.
code is here

if (Page.IsPostBack == false)
            {
                string s = Session["loginid"].ToString();

                if (Session["loginid";].ToString() == "")
                {
                    Response.Redirect("errorpage1.aspx");
                }
            }

推荐答案

通常，如果用户注销，我们使用Session.Abondon()方法销毁存储在会话对象中的所有对象. 如果只需要清除特定的会话对象，请将其设置为null.

Usually we use Session.Abondon() method to destroy all objects stored in session object if a user logs out.
If you need to clear only a particular session object, set it to null.

Session["loginid"] = null;

并在需要检查是否有任何值的地方进行空检查.

And do a null check wherever you need to check if it has any value or not.

if (Session["loginid"] == null)
{
    //redirect
}
else
{
    //user is logged in
}

Session["loginid"] = "";仍然引用内存位置，但是如果为会话对象分配空值，它将不再引用任何内存位置，在您的情况下更有意义.

顺便说一句，如果(Session ["loginid" ; ].ToString()==")
，我还注意到您的代码中存在语法错误 分号不应该在那儿.

希望这会有所帮助！

Session["loginid"] = ""; still refers to a memory location, but if you assign the session object a null value, it will no more refer to any memory location, which in your case makes more sense.

BTW I also notice a syntax error in your code, if (Session["loginid";].ToString() == "")
The semi colon shouldn''t be there.

Hope this helps!

u可以像
那样做

u can do like

Session["loginid"]="";

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