//新增
private void button1_Click(object sender, EventArgs e)
{
Books book= new Books();
book.BuyPrice = 10;
book.BuyDate = DateTime.Now;
currBook = book;
button2.Enabled = true;
}
//点击网格
private void dataGridView1_Click(object sender, EventArgs e)
{
if (dataGridView1.CurrentCell == null) return;
int rowindex = dataGridView1.CurrentCell.RowIndex;
DataTable dt = (DataTable)dataGridView1.DataSource;
Books book = new Books();
book.Id = Convert.ToInt32(dt.Rows[rowindex]["Id"]);
book.BookName = dt.Rows[rowindex]["BookName"].ToString();
book.BuyPrice = Convert.ToDecimal(dt.Rows[rowindex]["BuyPrice"]);
book.BuyDate = Convert.ToDateTime(dt.Rows[rowindex]["BuyDate"]);
book.Flag = Convert.ToInt32(dt.Rows[rowindex]["Flag"]);
currBook = book;
}