How to calculate code coverage with NCover using Jenkins?
You can use the NCover plug-in or a post-build-task to start the calculation.
For second variant we mostly use a simple batch-file to start the action (in your case the ncover calculation). This batch-file will be called by the jenkins post-build-task.
Edit:
To get HTML you can do it via (look here):
NCover.Reporting Coverage.xml //or FullCoverageReport:Html //op "C:\Coverage Report"