Basic Q: Page variables

  • Thread starter Thread starter Jimmy
  • Start date Start date
J

Jimmy

This is a basic question. Does Page related member variable values
only be set in the Page they are executed? Example code like below

public partial class _Default : System.Web.UI.Page
{
string var = "";

protected void BtnSubmit_Click(object sender, EventArgs e)
{
if (Select.Checked)
{
var = "Visited";
tbox.Text = "Selected On " + var;
}
else
tbox.Text = "Selected Off " + var;
}


Variable var is set to value 'Visited' ONLY in web page that is executed by
submit.
Not in other instances of same page executed in other page instances in
other Browser instances.

What I like to know that does Page instance differ in this case from Java's
Servlet member variables
that are shared with all instances.

Cheers!
 
The page class is like any other class. Any variables defined in it, are
tied to an instance of the class. If you wanted to have the variable be
shared among all instance, you would have to declare it as 'static'.
 
Marina Levit said:
The page class is like any other class. Any variables defined in it, are
tied to an instance of the class. If you wanted to have the variable be
shared among all instance, you would have to declare it as 'static'.
Click to expand...

It would then require synchronization to prevent it being updated by
multiple threads simultaneously.

Writable static member variables are usually a bad idea in web pages.

John
 
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