private void button2_Click(object sender, EventArgs e)
{
if (dataGridView3.SelectedRows.Count > 0)
{
int index = dataGridView3.SelectedRows[0].Index;
int id = 0;
bool converted = Int32.TryParse(dataGridView3[0, index].Value.ToString(), out id);
if (converted == false)
{
return;
}
Entity_DB.Students Stud = db.Students.Find(id);
db.Students.Remove(Stud);
db.SaveChanges();
DGV3fill();
MessageBox.Show("Запись удалена");
}
}
private void button5_Click(object sender, EventArgs e)
{
StudentForm SF = new StudentForm();
DialogResult result = SF.ShowDialog(this);
if (result == DialogResult.Cancel)
{
return;
}
Entity_DB.Students Student = new Entity_DB.Students();
Student.Name = SF.textBox1.SelectedText;
Student.Date_of_birth = SF.textBox2.SelectedText;
Student.Group_Id = (int)SF.comboBox1.SelectedValue;
db.Students.Add(Student);
db.SaveChanges();
DGV3fill();
MessageBox.Show("Новый студент добавлен");
}
