ASP.NET 2.0 Master page: Where to Set/Get session value?

[Managed Code]

Hi all,

I've got a DropDownList for the connection string in a master page.
Transitioning between content pages causes it to reset to the first
value.

Under what conditions and where should I do the following?

1 - Initialize the DropDownlist.
2 - Set the default SelectedIndex value.
2 - Save the SelectedIndex value in session variable
3 - Retrieve the session value.

Down below is a trace of the flow.

Thanks...



------------------------------------------------------------
TestPage::TestPage
MyMasterPage::MyMasterPage
MyMasterPage::MyMasterPage_Init:!IsPostBack
MyMasterPage::MyMasterPage_Init:SelectedIndex(1)
TestPage::TestPage_Init:!IsPostBack
TestPage::TestPage_Load:!IsPostBack
MyMasterPage::MyMasterPage_Load:!IsPostBack

------------------------------------------------------------
TestPage::TestPage
MyMasterPage::MyMasterPage
MyMasterPage::MyMasterPage_Init:IsPostBack
MyMasterPage::MyMasterPage_Init:SelectedIndex(0)
TestPage::TestPage_Init:IsPostBack
TestPage::TestPage_Load:IsPostBack
MyMasterPage::MyMasterPage_Load:IsPostBack
MyMasterPage::ConnectionStringDDL_SelectedIndexChanged FIRED
MyMasterPage::Fireing off Index(0)
ConnStrChangedEventArgs::ConnStrChangedEventArgs (0)
TestPage::Master_ConnStrChanged

------------------------------------------------------------
TestPage::TestPage
MyMasterPage::MyMasterPage
MyMasterPage::MyMasterPage_Init:!IsPostBack
MyMasterPage::MyMasterPage_Init:SelectedIndex(1)
TestPage::TestPage_Init:!IsPostBack
TestPage::TestPage_Load:!IsPostBack
MyMasterPage::MyMasterPage_Load:!IsPostBack

------------------------------------------------------------
TestPage::TestPage
MyMasterPage::MyMasterPage
MyMasterPage::MyMasterPage_Init:IsPostBack
MyMasterPage::MyMasterPage_Init:SelectedIndex(0)
TestPage::TestPage_Init:IsPostBack
TestPage::TestPage_Load:IsPostBack
MyMasterPage::MyMasterPage_Load:IsPostBack
MyMasterPage::ConnectionStringDDL_SelectedIndexChanged FIRED
MyMasterPage::Fireing off Index(0)
ConnStrChangedEventArgs::ConnStrChangedEventArgs (0)
TestPage::Master_ConnStrChanged