//updateBook(String BookNo,String BookName,String Author,String Publishment,String BuyTime,String Borrowed,String Ordered,String Introduction)
public String updateBook(String BookNo, String BookName, String Author, String Publishment, String BuyTime, String Borrowed, String Ordered, String Introduction)
{
DB.updateBook(BookNo, BookName, Author, Publishment, BuyTime, Borrowed, Ordered, Introduction);
String ISBN = "";
ISBN = DB.GetBookNoISBN(BookNo); //得到ISBN
String sql = "update book set B_Name='" + BookName + "',B_Author='" + Author + "',B_Publishment='" + Publishment + "',B_BuyTime='" + BuyTime + "' Where ISBN = '" + ISBN + "'";
String sql2 = "update bdetailedinformation set Borrowed='" + Borrowed + "',Ordered='" + Ordered + "',Introduction='" + Introduction + "' Where B_Num = '" + BookNo + "'";
return(sql);
}