棘手问题谢谢

namespace BookShop.DAL
{
    public static class SQLHelper
    {
        //数据库连接对象
        private static SqlConnection conn;
        private static string connStr;        static SQLHelper()
{
//从配置文件中获取数据库连接字符串
            connStr = ConfigurationManager.ConnectionStrings["BookShopconnStr"].ToString();
conn = new SqlConnection(connStr);
        }        #region 数据库连接
        /// <summary>
/// 打开数据库连接
/// </summary>
        private static void OpenConnection()
{
//如果关闭了数据库连接
if (conn.State == ConnectionState.Closed)
{
conn.Open();
}
} /// <summary>
/// 关闭数据库连接
/// </summary>
        private static void CloseConnection()
{
//如果打开了数据库连接
if (conn.State == ConnectionState.Open)
{
conn.Close();
}
        }        public static int ExecuteNonQuery(string sql, CommandType typeText, SqlParameter[] parames)
        {
int count = 0;
            try
            {
                SqlCommand comm = new SqlCommand();
                comm.CommandText = sql;
                comm.CommandType = typeText;
                comm.Connection = conn;                //comm.Parameters.AddRange(parames);                if (parames != null && parames.Length > 0)
                {
                    //循环为参数赋值
                    for (int i = 0; i < parames.Length; i++)
                    {
                        comm.Parameters.Add(parames[i]);
                    }
                }
                //如果sql语句为空不执行
                if (!string.IsNullOrEmpty(sql))
                {
                    OpenConnection();
                    //执行sql语句返回受影响的行数
                    count = comm.ExecuteNonQuery();
                    CloseConnection();
                }
            }
            catch(Exception ex)
            {
                CloseConnection();
                throw ex;
            }
            return count;
        }
这种写连接数据库方法如果同时在线100人以上操作会有问题么？