A fund-raiser by Mayor de Blasio’s Thursday night in Midtown was assailed by protesters, who blasted him for his views on ­issues from carriage horses to housing to public safety.

Chanting, “F–k Bill de Blasio” and, “One-term mayor,” about 50 protesters railed outside the Sheraton Midtown against the addition of extra cops with taxpayer money, a plan to privatize public-housing land and a rezoning plan in Brooklyn.

At one point, about 20 of them rushed into the hotel, but cops ejected them. No one was arrested. A separate group of about 30 demanded a carriage-horse ban, calling de Blasio a “sellout.”

Hizzoner raised more than $1 million at the fund-raiser, kicking off his re-election campaign.