How to generate a compiler error based on an attribute being missing in C#?
I create a number of add-ins for the Revit Structure API. Each tool has to habe a class which implements the interface IExternalCommand.
In the latest version of Revit, for your tool to work you need to have two attributes on the class that i开发者_Python百科mplements that interface:
[Regeneration(RegenerationOption.Manual)] [Transaction(TransactionMode.Automatic)]
The values in brackets can change, but there must be something there. Often I am finding myself forgetting to put the attributes on, then when it comes to runtime it crashes. Is there any way in Visual Studio 2010 to add a compiler warning or error saying that if your class implements that interface it must have those 2 attributes? I have resharper if that helps.
Can anyone point me into the right direction?
Unfortunately not. (I don't know about Resharper, though)
If you have VS2010 Ultimate, you could write a custom Code Analysis rule.
Not during compile time, but I think it'd be easy to with reflection.
I suggest a separate program that uses reflection to examine your compiled assembly, finds all classes with the specified interface, then checks attributes on those classes, returning a nice friendly error message very quickly.
You'd still have to run this program after you compile your program, but depending on your IDE, you could set it as a post-build step.
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