public List <Student> GetStudents()
{
MySqlConnection conn = DB.Connection();
conn.Open();
var cmd = conn.CreateCommand() as MySqlCommand;
cmd.CommandText = @"SELECT students.* FROM courses
JOIN course_info ON (courses.course_id = course_info.course_id)
JOIN students ON (course_info.student_id = students.student_id)
WHERE courses.course_id = @CourseId;";
MySqlParameter courseIdParameter = new MySqlParameter();
courseIdParameter.ParameterName = "@CourseId";
courseIdParameter.Value = _course_id;
cmd.Parameters.Add(courseIdParameter);
var rdr = cmd.ExecuteReader() as MySqlDataReader;
List <int> studentIds = new List <int> {
};
while (rdr.Read())
{
int studentId = rdr.GetInt32(0);
studentIds.Add(studentId);
}
rdr.Dispose();
List <Student> students = new List <Student> {
};
foreach (int studentId in studentIds)
{
var studentQuery = conn.CreateCommand() as MySqlCommand;
studentQuery.CommandText = @"SELECT * FROM students WHERE student_id = @StudentId;";
MySqlParameter studentIdParameter = new MySqlParameter();
studentIdParameter.ParameterName = "@StudentId";
studentIdParameter.Value = studentId;
studentQuery.Parameters.Add(studentIdParameter);
var studentQueryRdr = studentQuery.ExecuteReader() as MySqlDataReader;
while (studentQueryRdr.Read())
{
int thisStudentId = studentQueryRdr.GetInt32(0);
string studentName = studentQueryRdr.GetString(1);
string studentDate = studentQueryRdr.GetString(2);
Student foundStudent = new Student(studentName, studentDate, thisStudentId);
students.Add(foundStudent);
}
studentQueryRdr.Dispose();
}
conn.Close();
if (conn != null)
{
conn.Dispose();
}
return(students);
}