ASP.net Simple example of manipulating cookies _ practical Tips

Copy Code code as follows:

protected void Page_Load (object sender, EventArgs e)
{
if (! IsPostBack)
{
HttpCookie cookie = request.cookies["Logininfo"];

if (cookie!= null)
{
Cb_repwd. Checked = true;
Tb_loginname.text = Uihelper.decrypt (cookie["LoginName"));
Tb_pwd. Attributes.Add ("Value", Uihelper.decrypt (cookie["pwd"));
}
Else
{
Tb_pwd. Attributes.Add ("Value", "Hu Jintao");
}

}

}

protected void Btn_login_click (object sender, EventArgs e)
{

if (uihelper.getstring (session["Code"]). ToUpper ()!=this.tb_code. Text.trim (). ToUpper ())
{
Ojavascript.alert ("Incorrect validation code input");
Return
}

Netuserservice Nerservice = contextfactory.getobject<netuserservice> ("Netuserservice");
String sql = string. Format ("from Netuser where Loginname= ' {0} '", Tb_loginName.Text.Trim ());
ilist<netuser> list = nerservice.find (SQL);
if (list. Count > 0)
{
if (list[0). Status = = 2)
{
Ojavascript.alert ("The account has been deactivated, please contact the Administrator");
Return
}
}

if (Nerservice.login (Tb_loginName.Text.Trim), Osecurity.getpwdencrypt (tb_pwd. Text.trim ()))
{
HttpCookie cookie = request.cookies["Logininfo"];
if (cb_repwd. Checked)
{
if (cookie = null)
{
HttpCookie cookielogin = new HttpCookie ("Logininfo");
Setcookies (cookielogin,7);
}
Else
{
if (Uihelper.decrypt (request.cookies["Logininfo"] ["LoginName"])!= Tb_loginName.Text.Trim ())
{
Setcookies (Cookie, 7);
}
}
}
Else
{
Setcookieexpires (cookie);
}


Ojavascript.redirect ("/");
}
Else
{
Ojavascript.alert ("Incorrect username or password");
}
}

    #region Cookies
   ///<summary>
   ///Setting cookies
   ///</summary>
   ///<param name= "Cookielogin" >httpcookie Cookielogin</param>
   ///<param name= "Expires" > Validity </param>
     private void Setcookies (HttpCookie cookielogin, int Expires)
    {
         Cookielogin. values["loginName"] = Uihelper.encrypt (Tb_loginName.Text.Trim ());
        Cookielogin. values["pwd"] = Uihelper.encrypt (tb_pwd. Text.trim ());
        Cookielogin. Expires = DateTime.Now.AddDays (Expires);
        Response.appendcookie (cookielogin);
   }

<summary>
Set Cookie Expiration
</summary>
<param name= "Cookielogin" >httpcookie cookielogin</param>
private void Setcookieexpires (HttpCookie cookielogin)
{
if (Cookielogin!= null)
{
Cookielogin. Expires = DateTime.Now.AddDays (-1);
Response.appendcookie (Cookielogin);
}
}
#endregion

Setting a cookie expiration is actually modifying the cookie, and you must resend the cookie to the client

Request.Cookies cookies, response,cookies add cookies

It's simple, but it's easy to make mistakes without knowing it.