I am am working on a project that would benefit from a rules engine. I have consided just using the windows workflow engine, but I would like to know what else is out there.
My project has spent most of it's budget. So I would need suggestions to be modestly priced (in the < $1,000 range).
I saw InRule, but they don't post prices (that I could see). So I am guessing it is one of those "if you have to ask you can't afford it" kind of products.
I saw this post: Looking for simple rules-engine library in .NET
But it is old and is focused on Open Source.
So, are there any modestly priced .Net rules engines out there?
I'm not sure what you have against open source. Many open source projects are quite powerful.
Here's some examples:
I recently needed a simple rules engine for a project so I wrote my own (using Windows Workflow with a re-hosted workflow editor for the rule creators). It does not utilize any forward/backward chaining of rules like most of the other rule engines, just executes the rules from top to bottom against the desired .NET object. It's simple but it worked for what I needed. It was difficult enough to create so I decided to license it. Check http://www.enigmasupercomputing.com/RulesEngine for tutorials and demos and a 30-day trial.
I don't know what exactly are you expecting from the rule engine. If a designer GUI then I won't help. But if you want to have a script-like rule definition language with the option of modifying the rules file 'online' (without stopping the application) then you could use Boo language to build a rule DSL. Look for Boo DSL book by Ayende Rahien.
来源：https://stackoverflow.com/questions/7296598/net-rules-engines