public TeacherModel UpdateTeacher(TeacherModel teacherModel)
{
int i = -1;
using (OleDbCommand command = new OleDbCommand())
{
i = ExecuteNonQuery(TeacherStringsInner.UpdateTeacher(teacherModel));
}
return(GetOneTeacherById(teacherModel.teacherId));
}
public int DeleteTeacher(string teacherId)
{
int i = 0;
if (GetOneTeacherById(teacherId) != null)
{
using (OleDbCommand command = new OleDbCommand())
{
i = ExecuteNonQuery(TeacherStringsInner.DeleteTeacher(teacherId));
}
}
return(i);
}
public List <TeacherModel> GetAllTeachers()
{
DataTable dt = new DataTable();
using (OleDbCommand command = new OleDbCommand())
{
dt = GetMultipleQuery(TeacherStringsInner.GetAllTeachers());
}
List <TeacherModel> arrTeacher = new List <TeacherModel>();
foreach (DataRow ms in dt.Rows)
{
arrTeacher.Add(TeacherModel.ToObject(ms));
}
return(arrTeacher);
}
public TeacherModel GetOneTeacherById(string teacherId)
{
DataTable dt = new DataTable();
if (teacherId.Equals(string.Empty) || teacherId.Equals(""))
{
throw new ArgumentOutOfRangeException();
}
TeacherModel teacherModel = new TeacherModel();
using (OleDbCommand command = new OleDbCommand())
{
dt = GetMultipleQuery(TeacherStringsInner.GetOneTeacherById(teacherId));
}
foreach (DataRow ms in dt.Rows)
{
teacherModel = TeacherModel.ToObject(ms);
}
return(teacherModel);
}