“&”和“!”的意思是什么?在属性名称之前?

从 http://www.tramontana.co.hu/wix/lesson5.php#5.3 :

准备一些特殊字符 名字会给他们额外的 含义:

%     environment variable (name is case insensitive)
$     action state of component
?     installed state of component
&     action state of feature
!     installed state of feature

最后四个可以返回以下内容 整数值:

-1   no action to be taken
1    advertised (only for components)
2    not present
3    on the local computer
4    run from the source

这些是Windows Installer条件语法上的运算符。有关完整列表,请参阅此msi-sdk文档: http://msdn.microsoft.com/en-us/library/aa368012.aspx .