private void btnAdd_Click(object sender, EventArgs e)
{
frmFoodDetails f2 = new frmFoodDetails();
f2.Show();
this.Hide();
}
private void btnEdit_Click(object sender, EventArgs e)
{
int rowIndex = dgvFood.CurrentCell.RowIndex;
int primaryKey = Convert.ToInt32(dgvFood.Rows[rowIndex].Cells[2].Value);
frmFoodDetails f2 = new frmFoodDetails(primaryKey);
f2.Show();
this.Hide();
}