Unable to set class variables in Page_Load

[David Ibc]

Hi,

I am having trouble setting class and session variables in the Page_Load
function in C#. No matter what I set the variables to in Page_Load they
are null when I try to access them in other code on the form.

- I have done this before in VB.Net and it has worked.
- I tried making the variables public (though they shouldn't need to be)
and got the same result
- If I move the same code into an on click event of a button on the web
form it works, so there is nothing in the code itself.

I am running VS 2003 on Windows 2000 Server. Below is some sample code.
If anyone can shed some light on this problem it would be much
appreciated. Also I tried setting breakpoints in Page_Load but the
debugger skips over it. Does anyone know how to get the debugger to step
through the Page_Load function?

private string strConn;
private MyObject obj;

private void Page_Load(object sender, System.EventArgs e)
{
strConn = ConfigurationSettings.AppSettings["ConnectionStr"];
obj = new MyObject(strConn);
Application["ConnectionString"] = strConn;
}

//obj will be undefined and strConn will be null
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[Olorin]

David lbc wrote:

Also I tried setting breakpoints in Page_Load but the
debugger skips over it. Does anyone know how to get the debugger to step through the Page_Load function?

Actually this makes me think there is a larger problem here.
The sample code you posted seems ok to me.
The fact that the debugger doesn't get to the Page_Load method, on the
other end, is odd.

Is the page load in a codebehind of a page in the project that you
start in debugging mode?

If so, the debugger should get there.

Are you by chance using nUnit, or some other 3rd party library? I ask
because about a year ago I hit a similar problem when using a 3rd paty
tool... for some reason, as we added the references to it and tried to
use it, we lost the ability to debug through our code. I think we
simply had to close Visual Studio (all instances of it if you have
multiple ones open) and re-open it to make it work again....
Also,
since your Page_Load doesn't call any other method, I wonder if we are
slipping on some scoping issue.

Try

public class MyCodeBehind
{
private string str = "";

public void Page_Load(object sender, System.EventArgs e)
{
str = "Hello";
Test();
}
private void Test()
{
string s2 = str; //<-- check via debugger if str is undef here !
}

}

Finally, is this Page_Load method correctly wired to be the event
handler for the PageLoad event of the page that this codebehind class
is linked to?

HTH,
F.O.R.

[David Ibc]

>> Finally, is this Page_Load method correctly wired to be

the event handler for the PageLoad event of the page
that this codebehind class is linked to?

Ding. ding. ding.

The InitializeComponent function was missing the following line:

this.Load += new System.EventHandler(this.Page_Load);

I think I had moved an old page out of the way and renamed a new page,
so maybe this got lost somewhere in the process. Also, I am now able to
step through Page_Load with the debugger.

Thanks for the advice. Much, much appreciated.


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