open msword file in c#

private DataTable GetData(SqlCommand cmd)
        {

            DataTable dt = new DataTable();
            String strConnString = System.Configuration.ConfigurationManager.ConnectionStrings["conString"].ConnectionString;
            SqlConnection con = new SqlConnection(strConnString);

            SqlDataAdapter da = new SqlDataAdapter();
            cmd.CommandType = CommandType.Text;
            cmd.Connection = con;

            try
            {
                con.Open();
                da.SelectCommand = cmd;
                da.Fill(dt);
                return dt;

            }
            catch
            {
                return null;
            }

            finally
            {
                con.Close();
                da.Dispose();
                con.Dispose();
            }
        }


        private void download(DataTable dt)
        {
            Byte[] bytes = (Byte[])dt.Rows[0]["FileBinary"];
            Response.Buffer = true;
            Response.Charset = "";
            Response.Cache.SetCacheability(HttpCacheability.NoCache);
            Response.ContentType = dt.Rows[0]["FileType"].ToString();
            Response.AddHeader("content-disposition", "attachment;filename="+ dt.Rows[0]["Type_Name"].ToString() + ".DOC");
            Response.BinaryWrite(bytes);
            Response.Flush();
        }


IN YOUR BUTTON:
string strQuery = "select * from TABLE where COLUMN=@id";
            SqlCommand cmd = new SqlCommand(strQuery);
            cmd.Parameters.Add("@id", SqlDbType.Int).Value = 1;
            DataTable dt = GetData(cmd);
            if (dt != null)
            {
                download(dt);
            }