Store gridview row values and display it on another page in gridview for a loggedin user

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C#

ASP

ASP.NET

Gridview

session

I have a list of products in gridview.In gridview there is check box for each row. Each row contains Car Name, Car Price.I am accessing carid value thru DataKeys property of gridview .What I want is

when user clicks on Book button I want to store each row values in something which I don't know how and use each row values to be displayed for particular user on another page.
I am thinking it analogous to shopping cart but I want only selected values and there is no such thing as quantity.
I want to do this using session.Somehow I want to store the list in session variable so that row values which are selected earlier can be used to update database.
Any help is appreciated.This is what I have done so far

protected void btnbook_Click(object sender, EventArgs e)
{
   int id = 0;
   foreach (GridViewRow gvrow in gvcar.Rows)
   {
        if (((CheckBox)gvrow.FindControl("chkSelect")).Checked == true)
        {
           var dataKey = gvcar.DataKeys[gvrow.RowIndex];
           if (dataKey != null)
              Response.Write((string) ("ID:"+dataKey.Value+"Name of Car"+gvrow.Cells[1].Text));
        }
        else
        {
           MessageBox.Show("Please select a car");
        }
    }
}