Trying to store-read variable between post backs

[alphajava]

I am trying to store an integer variable and make it persist in between post backs as follows:

private int imad;
// Inside Page_Load() I have this:
// Read val
if(this.ViewState["val"] == null)
{
val= 10;
}
else
{
val= (int)this.ViewState["val"] + 1;
}
// Store val
this.ViewState["val"] = val;

My problem is that at beginning of Page_Load()
ViewState["val"] is always = null. This means it is not persisting between post backs.

Please let me know if you have answer.
Thanks to all.

 

[JohnYingling]

if(!Page.IsPostBack)
{
val= 10;
}
else
{
val= (int)this.ViewState["val"] + 1;
}
// Store val
this.ViewState["val"] = val;

http://www.moldyoldy.com/VBComparedemo

- free online Compare/Diff of snippets

 

[RTomes]

IsPostBack should not matter for what you are doing.
Are you posting back using a server side event or using Response.Redirect. If you are using Response.Redirect then you loose you viewstate.
Make sure you don't have EnableViewstate for your ASPX page set to false.

 

[alphajava]

I think it is probably working! what confused me is that when I launch my page, IsPostBack is false, and it does not preserve state between page refreshes. Once I click on any control, which has the AutoPostBack property set to true, the IsPostBack becomes true and it works. Maybe this is how it works.

I am still wondering how do you set the "EnableViewstate" for the ASPX page?
I tried right mouse click and then property; I got the document property pages dialog, which does not have any setting for EnableViewstate.

Thanks to all.

 

[RTomes]

<%@ Page EnableViewState="False" %>

http://msdn.microsoft.com/library/d.../en-us/cpgenref/html/cpconPage.asp?frame=true