public int DeleteStudent(string studentId)
{
int i = 0;
if (GetOneStudentById(studentId) != null)
{
using (SqlCommand command = new SqlCommand())
{
i = ExecuteNonQuery(StudentStringsSql.DeleteStudent(studentId));
}
}
return(i);
}
public StudentModel UpdateStudent(StudentModel studentModel)
{
DataTable dt = new DataTable();
using (SqlCommand command = new SqlCommand())
{
dt = GetMultipleQuery(StudentStringsSql.UpdateStudent(studentModel));
}
foreach (DataRow ms in dt.Rows)
{
studentModel = StudentModel.ToObject(ms);
}
return(studentModel);
}
public List <StudentModel> GetAllStudents()
{
DataTable dt = new DataTable();
using (SqlCommand command = new SqlCommand())
{
dt = GetMultipleQuery(StudentStringsSql.GetAllStudents());
}
List <StudentModel> arrStudent = new List <StudentModel>();
foreach (DataRow ms in dt.Rows)
{
arrStudent.Add(StudentModel.ToObject(ms));
}
return(arrStudent);
}
public StudentModel GetOneStudentById(string studentId)
{
DataTable dt = new DataTable();
if (studentId.Equals(string.Empty) || studentId.Equals(""))
{
throw new ArgumentOutOfRangeException();
}
StudentModel studentModel = new StudentModel();
using (SqlCommand command = new SqlCommand())
{
dt = GetMultipleQuery(StudentStringsSql.GetOneStudentById(studentId));
}
foreach (DataRow ms in dt.Rows)
{
studentModel = StudentModel.ToObject(ms);
}
return(studentModel);
}