Storing a Complex Object in Session State

Question

I have a separate class under my App_Code folder (.NET project) called "StateBag.cs"

using System; using System.Text;

[Serializable()]
public class MyStateBag
{
    public MyStateBag(){}
    private string _MemberID = string.Empty;
    public string MemberID
    {
        get { return _MemberID; }
        set { _MemberID = value; }
    }
}

Now I want to be able to update the MemberID value from any page of my web project.

example:-

Default.aspx.cs:-

  public partial class _Default : System.Web.UI.Page
  {
    public StateBag MyStateBag
    {
        get { return (StateBag)Session["MyStateBag"]; }
        set { Session["MyStateBag"] = value; }
    }

    protected void Page_Init(object sender, EventArgs e)
    {
        this.MyStateBag = (StateBag)Session["MyStateBag"];
    }

    .... }

On my Default.aspx.cs Page I am trying to set the value of memberID into MyStateBag:-

 if (HttpContext.Current.Session["MyStateBag"] == null)
        {
            HttpContext.Current.Session["MyStateBag"] = new StateBag();
        }
        ((StateBag)HttpContext.Current.Session["MyStateBag"]).MemberID = memID;

However I get a conflict:- 'System.Web.UI.StateBag' does not contain a definition for 'MemberID' and no extension method 'MemberID' accepting a first argument of type 'System.Web.UI.StateBag' could be found (are you missing a using directive or an assembly reference?)

Do I have to reference something on my Default.aspx.cs page that I am missing out on??

and how can i access it back...say I am on a different page,"About.aspx.cs".

I want to be able to say :-memberinfo = StateBag["MemberID"]

Can anyone help me understand this?

Answer 1

Anything you save to the Session object will stay with that user as they travel around your site. So on Default.aspx.cs you might have something like:

//Make sure there is an object saved for this user
if(Session["StateBag"] == null)
   Session["StateBag"] = new StateBag();

//Set what you need
((StateBag)Session["StateBag"]).MemberID = 1234;

Then on another page you can access it the same way

//Make sure there is an object saved for this user
if(Session["StateBag"] == null)
   Session["StateBag"] = new StateBag();

//Get what you need
int memberID = ((StateBag)Session["StateBag"]).MemberID