How to delete row from gridvew ,as using session?

Question

I am trying to delete row from gridview using session,not from database,i have two page on  first page i have datalist and second page have gridview ,i am passing data from datalist to anpother page gridview,

Now i want to delete row from gridview ,for storing data in gridview i am using session,i have used row deleting event but row is not getting deleted...please help me out...

 

protected void GridView1_RowDeleting(object sender, GridViewDeleteEventArgs e)
   {
       int index = Convert.ToInt32(e.RowIndex);
       DataTable dt = (DataTable)Session["buyitems"];
       dt.Rows[index].Delete();
       Session["buyitems"] = dt;
       GridView1.DataSource = dt;
       GridView1.DataBind();
   }

On Page load 

 

protected void Page_Load(object sender, EventArgs e)
 {
     DataTable dt;
     dt = (DataTable)Session["buyitems"];
     GridView1.DataSource = dt;
     GridView1.DataBind();

 }