The expression prefix identifies the custom expression type and associates an expression with the expression builder and expression editor 表达式前缀标识自定义表达式类型,并将表达式与表达式生成器和表达式编辑器关联。
The list of expression types available to you might vary according to what expression builders have been installed and how the web site has been configured 根据所安装的表达式生成器和网站配置方式,您可以使用的表达式类型列表将会有所不同。
Maps the expression to the associated section name in the configuration for common expression types , or maps the expression to the custom expression class 将表达式映射到关联的配置节名称(对于通用表达式类型) ,或者将表达式映射到自定义表达式类。
Class , if you are defining a new expression type for control property values and you want to build the expression string based on multiple expression property values 如果要为控件的属性值定义一个新的表达式类型并要基于多个表达式属性值生成表达式字符串,请从
This operator is not otherwise supported by the integration services expression grammar and can only be used by the initialization and assignment expression types in the for loop container 此运算符在其他方面不为integration services表达式语法所支持,只能供for循环容器中的初始化和赋值表达式类型使用。
Cschema language has a type system to guarantee the type correctness of the embedded calculation expressions and moreover this type system also generates a security view after type checking a cschema policy 另外,这个类型系统也为通过检查的cschema策略产生安全视图。一个安全视图是一个没有包含保护类型的正规表达式类型。
However , in the context of attribute initializers and assignments the named instances of the expression s type are introduced into the lexical scope with weaker visibility than variables and attributes and may be referenced with their unqualified names , for example 然而,在属性初始化程序和赋值的上下文中,表达式类型的命名实例被引入到了词法作用域lexical scope可见性弱于变量和属性,并可以通过使用它们的无限定名unqualified names引用这些命名实例: