需要注意的是，调试时更新的数据库是 debug目录下的数据库；
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，选择datagridview的当前行的各个单元格数据进行更新，调试时，更新的是项目的debug目录下的数据库
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());
}