problema lettura parametri crosspage postback

[riccardone]

http://msdn.microsoft.com/en-us/library/ms178139(VS.80).aspx

if (Page.PreviousPage != null)
{
    TextBox SourceTextBox = 
        (TextBox)Page.PreviousPage.FindControl("TextBox1");
    if (SourceTextBox != null)
    {
        Label1.Text = SourceTextBox.Text;
    }
}