问题
I have an vb.net app that handles directory service attributes. I have to display the attribute values. To get the values I use LDAP.
Microsoft's Active Directory has the syntax (or type) LARGE_INTEGER / INTEGER8. I saw various LDAP-Browsers that display this type of attribute as DateTime. But Microsoft's documentation says that this syntax (or type) is a 64-bit signed integer value.
My question: Does the schema definition provide an information where I can detect that an attribute with the LARGE_INTEGER syntax should be handled as DateTime or not?
Here is an example:
- lastLogoff -> DateTime
- msExchVersion -> No DateTime
Both attributes have the same syntax.
Thank you for helping!
回答1:
Yes. The LARGE_INTEGER thing is an abstraction at the ADSI layer. If you look at the docs for the lastLogoff attribute, for example (http://msdn.microsoft.com/en-us/library/ms676822(v=vs.85).aspx), you'll see the actual AD syntax is Interval. You can grab the syntax for a given attribute off the attribute definition in the schema.
回答2:
Regarding to the following post it seems that there is no way to see whether a LARGE_INTEGER attribute should be handled as DateTime or not :\
Same datatype Storage but different representation in AD (UsnChanged and LastLogon)
来源：https://stackoverflow.com/questions/24905407/acitve-directory-handling-attributes-with-large-integer-integer8-syntax