EF test

        LibraryEntities db = new LibraryEntities();
        private void btnSelect_Click(object sender, EventArgs e)
        {
            //查询语句
             List<BookInfo> book = db.BookInfo.ToList();
             dataGridView1.DataSource = book; //查询所有数据 并绑定
            //查询指定数据并绑定 包含文本的 类似与like%xx%
            List<BookInfo> book1 = db.BookInfo.Where(x => x.图书名称.Contains(txtName.Text.Trim())).ToList();
            dataGridView1.DataSource = book1;

        }