private void btnsave_Click(object sender, EventArgs e)
{
using (dbconection db = new dbconection())
{
Grade grade = new Grade();
grade.Name = txtname.Text;
grade.TeacherId = Convert.ToInt32(cmbteacher.SelectedValue);
db.Grades.Add(grade);
db.SaveChanges();
}
}
private void btndelete_Click(object sender, EventArgs e)
{
int?id = GetId();
using (dbconection database = new dbconection())
{
Teacher teacher = database.Teachers.Find(id);
database.Teachers.Remove(teacher);
database.SaveChanges();
}
CleanTxt();
GetTeachers();
}
private void btnsave_Click(object sender, EventArgs e)
{
using (dbconection db = new dbconection())
{
Teacher teacher = new Teacher();
teacher.Name = txtname.Text;
teacher.LastName = txtlastname.Text;
teacher.Gender = cmbgender.Text;
db.Teachers.Add(teacher);
db.SaveChanges();
CleanTxt();
}
GetTeachers();
}
private void btnedit_Click(object sender, EventArgs e)
{
int?id = GetId();
using (dbconection database = new dbconection())
{
Teacher teacher = null;
teacher = database.Teachers.Find(id);
teacher.Name = txtname.Text;
teacher.LastName = txtlastname.Text;
teacher.Gender = cmbgender.Text;
database.Entry(teacher).State = System.Data.Entity.EntityState.Modified;
database.SaveChanges();
}
GetTeachers();
}