How to use a property of an object in asp:SessionParameter

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I am trying to get an asp:SessionParameter of a SelectParameters, to use a property of an object in session
instead of having a string in the session like Session["CustomerID"]

Something like Session["Customer"] where the property is ((Customer) Session["Customer"]).CustomerID)

I don’t know the syntax to do that, if you can help, I’d really appreciate it

Thank you

My code:

<asp:sqldatasource id="SqlDataSource1" runat="server" connectionstring="<%$ ConnectionStrings:DBConnectionString %>" xmlns:asp="#unknown">
        SelectCommand="SELECT * FROM getStoreCustomers (@customerID,@week,@day)"
        ProviderName="System.Data.SqlClient">
        <selectparameters>
            <asp:sessionparameter name="customerID" sessionfield="Customer" /> ?????? (what is the syntax to pass the property here?)
            <asp:controlparameter controlid="ddWeek" defaultvalue="-1" name="week" propertyname="SelectedValue" />
            <asp:controlparameter controlid="ddDay" defaultvalue="-1" name="day" propertyname="SelectedValue" />
        </selectparameters>
    </asp:sqldatasource>

The class I use is like any other class (but serializable)

[Serializable]
    public class Customer
    {
        public int CustomerID
        {
            get;
            set;
        }
    }

Posted 19-Jul-10 14:57pm

tucho

Updated 19-Jul-10 18:25pm

Abhinav S

v2

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PSK_ 20-Jul-10 1:21am

I don't think that you can bind the property of a class stored in session, in sessionfield you can specify only a key stored in session.

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Uwe Keim · Answer 1 · 2010-11-22T22:16:00

I just did resolve this issue by deriving my own class from SessionParameterInfo.

See this example as a start:

namespace MyNameSpace
{
	using System.Reflection;
	using System.Web;
	using System.Web.UI;
	using System.Web.UI.WebControls;

	public class LoggedInUserSessionParameter :
		SessionParameter
	{
		protected override object Evaluate(
			HttpContext context,
			Control control)
		{
			if ((context != null) && (context.Session != null))
			{
				var fieldName = SessionField;

				var liui = context.Session[@"CurrentUserInfo"] as LoggedInUserInformation;
				if (liui == null)
				{
					return null;
				}
				else
				{
					return liui.GetType().InvokeMember(fieldName, BindingFlags.GetProperty, null, liui, null);
				}
			}
			else
			{
				return base.Evaluate(context, control);
			}
		}
	}
}

You than can register the control on your page:

<%@ Register Namespace="MyNameSpace" TagPrefix="mns" %>

And then use it like this:

<mns:LoggedInUserSessionParameter Name="LegalEntityID" SessionField="LegalEntityID" Type="Int32" />

Regards
Uwe