How to store list box items into session

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C#3.0

C#

Hai friends,

I have one doubt in list box.

I have created a list box.It is populating the values from a sql table.It also allows multi selection to true.Can u please tell me how can i store the listbox item values in a session.

I have tried the below code:
ASP.NET Code:

<tr>
                <td align="right">
                 
                  
                  <asp:Label ID="lblPrimaryImpactedArea" runat="server" Text="Primary Impact Area"></asp:Label>
                </td>
                <td>
                   <asp:ListBox ID="lstPrimaryImpactedArea" runat="server" SelectionMode="Multiple">
                      
                    </asp:ListBox>
                </td>
               
            </tr>

C# code:

Session["PrimaryImpactedArea"] = lblPrimaryImpactedArea.SelectedItem.Text;

Suppose if i want to use the above listbox items into next page I tried the below code:

To View the listbox items in next page:

string PrimaryImpactedArea = System.Web.HttpContext.Current.Session["PrimaryImpactedArea"].ToString();
             lstPrimaryImpactedArea.SelectedItem.Text = Session["PrimaryImpactedArea"].ToString();
             lstPrimaryImpactedArea.Enabled = false;

But it is not working.Please help me.

Thanks in Advance