thisCommand.CommandText = "UPDATE Products SET "+"UnitPrice=UnitPrice*1.05 WHERE SupplierID=12";为什么不写成
thisCommand.CommandText = "UPDATE Products SET UnitPrice=UnitPrice*1.05 WHERE SupplierID=12";
thisCommand.CommandText = "UPDATE Products SET UnitPrice=UnitPrice*1.05 WHERE SupplierID=12";
你的程序实际上是把一个SQL语句传给SQL服务器来执行罢了.