Sorry this is my original code for save btn
but data changes saved for moments just
when i open access database its changed
but after moments when run project again its empty
private void SavItemBtn_Click(object sender, EventArgs e)
{
devlistTableAdapter.Connection.Open();
itemsListDataSet.GetChanges();
devlistBindingSource.EndEdit();
devlistTableAdapter.Update(itemsListDataSet.Devlist);
devlistTableAdapter.Connection.Close();
savetag = true;
}