Cant get rid off viewstate

[Mariano Drago]

Hi there
Im having problems with some checkbox generated at runtime.
In a form, i draw some html checkboxes, each chekbox represents a kinda
"department" the user is linked to. The problems is that when a postback is
generated and the page reloads, the old state (checked) of the checkboxes
remains although i explicit set it to false.
To ilustrate the problem, simply create a form, drag a panel (or
placeholder, its the same) and a button and put this code in page_load
event:

for(int i = 0; i < 10; i++)

{

HtmlInputCheckBox chk = new HtmlInputCheckBox();

chk.ID = "chk_" + i.ToString();

chk.Name = chk.ID;

chk.Checked = false;

Panel1.Controls.Add(chk);

}

No matter if you set "enabledviewstate" to false in the Panel or the in the
page, you will see that after hiting the button the checks will be as you
left they before.

I check with FindControl inside the controlcollection of the panel and its
empty...

How can i avoid that???? How can i set the checkbox to false in every hit?

Thanks in advance.-

Try Explicitly Sett the EnableViewState property to False in your code
chk.EnableViewState = false;

Hope this helps. Posting is provided as is

"Mariano Drago" <md****@softhome.net> wrote in message
news:O7**************@TK2MSFTNGP10.phx.gbl...

Hi there
Im having problems with some checkbox generated at runtime.
In a form, i draw some html checkboxes, each chekbox represents a kinda
"department" the user is linked to. The problems is that when a postback
is
generated and the page reloads, the old state (checked) of the checkboxes
remains although i explicit set it to false.
To ilustrate the problem, simply create a form, drag a panel (or
placeholder, its the same) and a button and put this code in page_load
event:

for(int i = 0; i < 10; i++)

{

HtmlInputCheckBox chk = new HtmlInputCheckBox();

chk.ID = "chk_" + i.ToString();

chk.Name = chk.ID;

chk.Checked = false;

Panel1.Controls.Add(chk);

}

No matter if you set "enabledviewstate" to false in the Panel or the in
the
page, you will see that after hiting the button the checks will be as you
left they before.

I check with FindControl inside the controlcollection of the panel and its
empty...

How can i avoid that???? How can i set the checkbox to false in every hit?

Thanks in advance.-

Try Explicitly Sett the EnableViewState property to False in your code
chk.EnableViewState = false;

Hope this helps. Posting is provided as is

"Mariano Drago" <md****@softhome.net> wrote in message
news:O7**************@TK2MSFTNGP10.phx.gbl...

Hi there
Im having problems with some checkbox generated at runtime.
In a form, i draw some html checkboxes, each chekbox represents a kinda
"department" the user is linked to. The problems is that when a postback
is
generated and the page reloads, the old state (checked) of the checkboxes
remains although i explicit set it to false.
To ilustrate the problem, simply create a form, drag a panel (or
placeholder, its the same) and a button and put this code in page_load
event:

for(int i = 0; i < 10; i++)

{

HtmlInputCheckBox chk = new HtmlInputCheckBox();

chk.ID = "chk_" + i.ToString();

chk.Name = chk.ID;

chk.Checked = false;

Panel1.Controls.Add(chk);

}

No matter if you set "enabledviewstate" to false in the Panel or the in
the
page, you will see that after hiting the button the checks will be as you
left they before.

I check with FindControl inside the controlcollection of the panel and its
empty...

How can i avoid that???? How can i set the checkbox to false in every hit?

Thanks in advance.-

[Mariano Drago]

Nop, it dosent work.

[Mariano Drago]

Nop, it dosent work.

[Mariano Drago]

I also look inside the HttpContext for the cached checkboxes (they must be
somewhere!) and found nothing :(

[Mariano Drago]

I also look inside the HttpContext for the cached checkboxes (they must be
somewhere!) and found nothing :(

[Teemu Keiski]

Hi,

earlier your code to put them unchecked is otherwise correct, but you need
to do that (putting them unchecked) in PreRender as postback data loading
for CheckBoxes (or dynamical controls generally) is done after Page_Load.
And yes, disabling ViewState won't help because this isn't controlled by
ViewState at all.

I've discussed the same behaviour, though with TextBoxes in my blog post:
http://blogs.aspadvice.com/joteke/ar...03/15/767.aspx

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
http://blogs.aspadvice.com/joteke


"Mariano Drago" <md****@softhome.net> wrote in message
news:Oa**************@TK2MSFTNGP10.phx.gbl...

I also look inside the HttpContext for the cached checkboxes (they must be
somewhere!) and found nothing :(

[Teemu Keiski]

Hi,

earlier your code to put them unchecked is otherwise correct, but you need
to do that (putting them unchecked) in PreRender as postback data loading
for CheckBoxes (or dynamical controls generally) is done after Page_Load.
And yes, disabling ViewState won't help because this isn't controlled by
ViewState at all.

I've discussed the same behaviour, though with TextBoxes in my blog post:
http://blogs.aspadvice.com/joteke/ar...03/15/767.aspx

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
http://blogs.aspadvice.com/joteke


"Mariano Drago" <md****@softhome.net> wrote in message
news:Oa**************@TK2MSFTNGP10.phx.gbl...

I also look inside the HttpContext for the cached checkboxes (they must be
somewhere!) and found nothing :(

[Mariano Drago]

Thanks for the answer Teemu.
I readed the blog... and now i understand the problem.
Knowing that, i simple get rid of the checkbox and use:
Label lb = new Label();

lb.Text = "<input name='chk_"+i.ToString()+"' id='chk_"+i.ToString()+"'
type='checkbox' />";

Panel1.Controls.Add(ln);

It isnt elegant, i know, but it works ;)
Thanks again!

"Teemu Keiski" <jo****@aspalliance.com> escribió en el mensaje
news:ex**************@TK2MSFTNGP09.phx.gbl...

Hi,

earlier your code to put them unchecked is otherwise correct, but you need
to do that (putting them unchecked) in PreRender as postback data loading
for CheckBoxes (or dynamical controls generally) is done after Page_Load.
And yes, disabling ViewState won't help because this isn't controlled by
ViewState at all.

I've discussed the same behaviour, though with TextBoxes in my blog post:
http://blogs.aspadvice.com/joteke/ar...03/15/767.aspx

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
http://blogs.aspadvice.com/joteke


"Mariano Drago" <md****@softhome.net> wrote in message
news:Oa**************@TK2MSFTNGP10.phx.gbl...

I also look inside the HttpContext for the cached checkboxes (they must be somewhere!) and found nothing :(

[Mariano Drago]

Thanks for the answer Teemu.
I readed the blog... and now i understand the problem.
Knowing that, i simple get rid of the checkbox and use:
Label lb = new Label();

lb.Text = "<input name='chk_"+i.ToString()+"' id='chk_"+i.ToString()+"'
type='checkbox' />";

Panel1.Controls.Add(ln);

It isnt elegant, i know, but it works ;)
Thanks again!

"Teemu Keiski" <jo****@aspalliance.com> escribió en el mensaje
news:ex**************@TK2MSFTNGP09.phx.gbl...

Hi,

earlier your code to put them unchecked is otherwise correct, but you need
to do that (putting them unchecked) in PreRender as postback data loading
for CheckBoxes (or dynamical controls generally) is done after Page_Load.
And yes, disabling ViewState won't help because this isn't controlled by
ViewState at all.

I've discussed the same behaviour, though with TextBoxes in my blog post:
http://blogs.aspadvice.com/joteke/ar...03/15/767.aspx

--
Teemu Keiski
MCP, Microsoft MVP (ASP.NET), AspInsiders member
ASP.NET Forum Moderator, AspAlliance Columnist
http://blogs.aspadvice.com/joteke


"Mariano Drago" <md****@softhome.net> wrote in message
news:Oa**************@TK2MSFTNGP10.phx.gbl...

I also look inside the HttpContext for the cached checkboxes (they must be somewhere!) and found nothing :(