摘要: MasterPages: Improved VersionPaul Wilson www.WilsonDotNet.com www.ASPAlliance.com/PaulWilson Previous Article Download Demo Next Article OverviewMasterPages is the most flexib... 阅读全文
posted @ 2004-02-17 20:41 dudu 阅读(1668) 评论(0) 推荐(0) 编辑
摘要: MasterPages: IntroductionPaul Wilson www.WilsonDotNet.com www.ASPAlliance.com/PaulWilson Previous Article Download Demo Next Article OverviewMasterPages is the only solution f... 阅读全文
posted @ 2004-02-17 20:13 dudu 阅读(3375) 评论(3) 推荐(0) 编辑
摘要: as : expression as type 用于执行可兼容类型之间的转换。 as 运算符类似于类型转换,所不同的是,当转换失败时,as 运算符将产生空,而不是引发异常。is: expression is type 用于检查对象的运行时类型是否与给定类型兼容。 is 运算符只考虑引用转换、装箱转换和取消装箱转换。is 运算符不考虑其他转换(如用户定义的转换)。 阅读全文
posted @ 2004-02-17 14:31 dudu 阅读(944) 评论(1) 推荐(0) 编辑
摘要: Abstract & Sealed Classes The abstract modifier is used to indicate that a class is incomplete and intended only to be a base class of other classes. An abstract class differs from a ... 阅读全文
posted @ 2004-02-17 14:07 dudu 阅读(1184) 评论(1) 推荐(0) 编辑