GZDBHelper中ExecuteNonQuery方法，返回受影响行数

/// <summary>
/// 执行SQL语句，并返回受影响行数
/// </summary>
/// <param name="sql">SQL语句</param>
/// <param name="parameters">查询参数</param>
/// <returns></returns>
int ExecuteNonQuery(string sql, IDbParms parameters);

GZDBHelper.SqlParameterProvider parm = new GZDBHelper.SqlParameterProvider();
parm.AddParameter("@isid", SqlDbType.Int, 1);
string sql = "delete from tb_test where isid=@isid";
db.ExecuteNonQuery(sql, parm);