/// <summary>
/// 根据班级Id查询学生列表
/// </summary>
/// <param name="classId"></param>
/// <returns>返回学生列表</returns>
public List <StudentExt> GetStudentByClassId(int classId)
{
string sql = "select StudentId,StudentName, Gender, Birthday, StudentIdNo, PhoneNumber, ClassName";
sql += " from Students inner join StudentClass on Students.ClassId=StudentClass.ClassId";
sql += " where StudentClass.ClassId=" + classId;
List <StudentExt> studentList = new List <StudentExt>();
SqlDataReader reader = SQLHelper.GetReader(sql);
//try
//{
// while (reader.Read())
// {
// studentList.Add(new StudentExt
// {
// StudentId = Convert.ToInt32(reader["StudentId"]),
// StudentName = reader["StudentName"].ToString(),
// Gender = reader["Gender"].ToString(),
// Birthday = Convert.ToDateTime(reader["Birthday"]),
// StudentIdNo = reader["StudentIdNo"].ToString(),
// PhoneNumber = reader["PhoneNumber"].ToString(),
// ClassName = reader["ClassName"].ToString(),
// }); ;
// }
// reader.Close();
// return studentList;
//}
//catch (Exception ex)
//{
// throw new Exception("查询学生列表时数据库访问异常" + ex.Message);
//}
return(db.GetAllModeList <StudentExt>(reader));
}