Button_Click and Session

[Marine]

Hi,

Sorry i'm a newbie with Asp.net, here is my problem :

private void Page_Load(object sender, System.EventArgs e)
{
if (IsPostBack) { Label1.Text = (string)Session["test"]; }
}

private void Button1_Click(object sender, System.EventArgs e)
{
Session["test"] = "test";
}

I have to click two times on the button to see "test".

Thanks for any help.

 

[Juan T. Llibre]

re:
!> I have to click two times on the button to see "test".

try this :

private void Button1_Click(object sender, System.EventArgs e)
{
Session["test"] = "test";
Label1.Text = (string)Session["test"];
}

Or...you can try this :

private void Page_Load(object sender, System.EventArgs e)
{
Label1.Text = (string)Session["test"];
}

 

[Roland Dick]

Hi Marine,

Hi,

Sorry i'm a newbie with Asp.net, here is my problem :
I have to click two times on the button to see "test".

The reason is that Page_Load gets executed before Button1_Click, so when
you click the button for the first time, Page_Load sets the label to an
(empty) session variable and only after that the session variable is set
to the string "test".

As Juan has shown, you can set the label text in the click event
directly and don't need to do that in Page_Load at all.

Hope this helps,

Roland

 

[guoqi zheng]

the first, you save the session, but the Label1.text was set before the
session was saved.

The second click, the session is there already, so it is set.

regards,

Guoqi Zheng
http://www.ureader.com

url:http://www.ureader.com/msg/141730872.aspx

 

[JinWeiJie]

because Page_Load comes ealier than Button1_Click.

may it help~

Ryan

 

[John MJ Gorter]

change the
if (IsPostBack)

to

if (!IsPostBack)

 

[=?ISO-8859-1?Q?G=F6ran_Andersson?=]

change the
if (IsPostBack)

to

if (!IsPostBack)

That will have the opposite effect of the wanted. With your suggested
chage, the text will never change.

 

[John MJ Gorter]

Oops, misread the intention, sorry...

Button_Click gets handled after the page_load, hence the label get's
set to early... Setting the label in the Button_Click should help...
but that was posted as an option earlier this thread

 

[Hans Kesting]

Hi,

Sorry i'm a newbie with Asp.net, here is my problem :

private void Page_Load(object sender, System.EventArgs e)
{
if (IsPostBack) { Label1.Text = (string)Session["test"]; }
}

private void Button1_Click(object sender, System.EventArgs e)
{
Session["test"] = "test";
}

I have to click two times on the button to see "test".

Thanks for any help.

And a suggestion I've not yet seen in this thread:
move the "label setting" from Page_Load to Page_PreRender, which is
called *after* the click has been handled.

Hans Kesting