Insert and update on single ASP.Net Button Click using C#

Insert and update on single ASP.Net Button Click is not working.

protected void Button2_Click6(object sender, EventArgs e)
{
    string emp_id = Label1.Text.Trim();
    string agncy_nm = TextBox12.Text.Trim();
    string nit_no = TextBox16.Text.Trim();
    string po_no = TextBox17.Text.Trim();
    string bg_typ = TextBox18.Text.Trim();

    string actn_pnding = "na";
    string schdle_dt = "na";
    string release_of_emd_bg = "na";
    string emd_bg_rlesed = "na";

    string bg_no = TextBox19.Text.Trim();
    string bg_issue_dt = TextBox20.Text.Trim();
    string bg_exp_dt = TextBox21.Text.Trim();
    string bg_issu_bnk = TextBox22.Text.Trim();
    string bg_rcv_midia = TextBox23.Text.Trim();
    string frst_rcv_whom = TextBox24.Text.Trim();
    string bg_hnd_ovr = TextBox25.Text.Trim();
    string is_biddr_sucsful = DropDownList1.Text.Trim();
    string is_biddr_to_sbmtd_sd_pbg = DropDownList3.Text.Trim();
    string bidder_sbmt_sd_pbg = DropDownList5.Text.Trim();
    string rmk = Label16.Text.Trim();
    string stts = Label9.Text.Trim();

    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    string query = "spInsert_bgms2";
    using (SqlConnection con = new SqlConnection(conString))
    {
        DateTime issueDate = Convert.ToDateTime(Request.Form[TextBox6.UniqueID]);
        DateTime expiryDate = Convert.ToDateTime(Request.Form[TextBox7.UniqueID]);
        if (expiryDate < issueDate)
        {
            ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", "alert('BG Expiry Date must be greater then BG Issue Date')", true);
        }
        else
        {
            SqlCommand cmd = new SqlCommand(query);
            cmd.Parameters.AddWithValue("@emp_id", emp_id);
            cmd.Parameters.AddWithValue("@agncy_nm", agncy_nm);
            cmd.Parameters.AddWithValue("@bg_typ", bg_typ);
            cmd.Parameters.AddWithValue("@nit_no", nit_no);
            cmd.Parameters.AddWithValue("@po_no", po_no);
            cmd.Parameters.AddWithValue("@bg_no", bg_no);
            cmd.Parameters.AddWithValue("@bg_issue_dt", bg_issue_dt);
            cmd.Parameters.AddWithValue("@bg_exp_dt", bg_exp_dt);
            cmd.Parameters.AddWithValue("@bg_issu_bnk", bg_issu_bnk);
            cmd.Parameters.AddWithValue("@bg_rcv_midia", bg_rcv_midia);
            cmd.Parameters.AddWithValue("@frst_rcv_whom", frst_rcv_whom);
            cmd.Parameters.AddWithValue("@bg_hnd_ovr", bg_hnd_ovr);
            cmd.Parameters.AddWithValue("@actn_pnding", actn_pnding);
            cmd.Parameters.AddWithValue("@schdle_dt", schdle_dt);
            cmd.Parameters.AddWithValue("@is_biddr_sucsful", is_biddr_sucsful);
            cmd.Parameters.AddWithValue("@is_biddr_to_sbmtd_sd_pbg", is_biddr_to_sbmtd_sd_pbg);
            cmd.Parameters.AddWithValue("@bidder_sbmt_sd_pbg", bidder_sbmt_sd_pbg);
            cmd.Parameters.AddWithValue("@release_of_emd_bg", release_of_emd_bg);
            cmd.Parameters.AddWithValue("@emd_bg_rlesed", emd_bg_rlesed);
            cmd.Parameters.AddWithValue("@rmk", rmk);
            cmd.Parameters.AddWithValue("@stts", stts);

            cmd.CommandType = CommandType.StoredProcedure;
            cmd.Connection = con;
            con.Open();
            cmd.ExecuteNonQuery();
            string Message = "BG Details has been saved successfully.";
            string script = "window.onload = function(){ alert('";
            script += Message;
            script += "');";
            script += "window.location = '";
            script += Request.Url.AbsoluteUri;
            script += "'; }";
            ClientScript.RegisterStartupScript(this.GetType(), "SuccessMessage", script, true);
            Response.Redirect("main.aspx", true);
            con.Close();
            con.Dispose();
        }
        string bg_id = Label5.Text.Trim();
        string stts1 = Label9.Text.Trim();
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection con1 = new SqlConnection(constr))
        using (SqlCommand cmd = new SqlCommand("UPDATE bgms SET stts=@stts WHERE bg_id = @bg_id"))
        {
            //SqlCommand cmd = new SqlCommand(SqlCommand);
            cmd.Parameters.AddWithValue("@bg_id", bg_id);
            cmd.Parameters.AddWithValue("@stts", stts);
            cmd.Connection = con1;
            con1.Open();
            cmd.ExecuteNonQuery();
            con1.Close();
        }
    }
}