Html Decode GridView Cell values and insert in database in ASP.Net

Hello,

Let me explain : I copy in a DataTable a GridView to display this GridView in a another page. It works but the gridview's content is not encoded in UTF-8.

This is the code which copy the gridview in a DataTable :

protected void ButtonDisplay_Click(object sender, EventArgs e)
        {

            // On copie dans un DataTable toute GridView filtré
            DataTable dt = new DataTable();
            for (int i = 0; i < GridView1.Columns.Count; i++)
            {
                dt.Columns.Add("column" + i.ToString());
            }
            foreach (GridViewRow row in GridView1.Rows)
            {
                DataRow dr = dt.NewRow();
                for (int j = 0; j < GridView1.Columns.Count; j++)
                {
                    dr["column" + j.ToString()] = row.Cells[j].Text;
                }

                dt.Rows.Add(dr);
            }

            // On change les noms des colonnes
            dt.Columns["column0"].ColumnName = "Objectif stratégique";
            dt.Columns["column1"].ColumnName = "Objectif opérationnel";
            dt.Columns["column2"].ColumnName = "Réf.Activité";
            dt.Columns["column3"].ColumnName = "Description activité";
            dt.Columns["column4"].ColumnName = "Début";
            dt.Columns["column5"].ColumnName = "Fin";
            dt.Columns["column6"].ColumnName = "Nom";
            dt.Columns["column7"].ColumnName = "Livrables";

            // On mets dans une variable "Session" le DataTable pour que l'autre page puisse accèder à ce GridView copié
            Session["dt"] = dt;
            Response.Redirect("consulterProgrammeDetails.aspx");

        }

Do you have a solution ?

Thanks