if (sqlCon.State == ConnectionState.Closed)
            sqlCon.Open();
        string Query = "select * from tbl_article where NameArticle='"+comboBoxArt.Text+"'";
        SqlCommand cmd = new SqlCommand(Query, sqlCon);
        SqlDataReader myReader;
        try
        {
            myReader = cmd.ExecuteReader();
            while (myReader.Read())
            {
                txtName.Text = myReader.GetString("NameArticle");
                txtPrice.Text = myReader.GetInt32("PriceArticle").ToString();
            }
        }