Prior to takeoff, the pilot forgot to properly latch the canopy. Shortly after rotation, the pilot noticed the canopy had partially opened. Subsequently, the airplane contacted the runway and the landing gear collapsed. The airplane came to rest upright on the side of the runway. Postaccident examination of the airplane revealed the fuselage was bent and buckled. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.