subelipse svn:ignore gray
1、Youcan'tsvn:ignoreafilethatisalreadycommitedtorepository.
2、Deleteitfromtherepository
3、RecreateitinEclipse
4、Setsvn:ignoreonitviaTeam->Addtosvn:ignore
Goodluck!
原文地址:http://stackoverflow.com/questions/9007540/update-svnignore-using-subclipse