需要注意的是，調試時更新的數據庫是 debug目錄下的數據庫；
private void updatebutton_Click(object sender, EventArgs e)
{
this.book_infoBindingSource.EndEdit();
this.book_infoTableAdapter.Update(this.bookstoreDataSet.book_info);
}
private void insertbutton_Click(object sender, EventArgs e)
{
//在datagridview里直接添加，選擇datagridview的當前行的各個單元格數據進行更新，調試時，更新的是項目的debug目錄下的數據庫
this.book_infoTableAdapter.Insert(this.book_infoDataGridView.CurrentRow.Cells[0].Value.ToString(),this.book_infoDataGridView.CurrentRow.Cells[1].Value.ToString(), this.book_infoDataGridView.CurrentRow.Cells[2].Value.ToString(), this.book_infoDataGridView.CurrentRow.Cells[3].Value.ToString(), Convert.ToDateTime(this.book_infoDataGridView.CurrentRow.Cells[4].Value),this.book_infoDataGridView.CurrentRow.Cells[5].Value.ToString(), this.book_infoDataGridView.CurrentRow.Cells[6].Value.ToString());
}