State Management :: Stroing Value In Session

iam stroring grid value in sessions , i don't want to use session ,if there is any otherway to

storing girdvalue and updated later on.

looking forward ur valuable suggestions,

dt.Columns.Add("fldexrefno", typeof(Int32));
dt.Columns.Add("fldslno", typeof(Int32));
dt.Columns.Add("fldexrefvalue", typeof(float));
DataRow row;
row = dt.NewRow();
row["fldexrefvalue"] = txtnewrefno.Text;
dt.Rows.Add(row);
if (Session["DT"] != null)
{
((DataTable)Session["DT"]).Merge(dt);
}
else
{
Session["DT"] = dt;
}
gridexrefvalue.DataSource = ((DataTable)Session["DT"]);
gridexrefvalue.DataBind();