I wonder if any can give me some suggestion on this...
I am willing to achieve a motion graphics background in which I would like to have dotted lines moving vertical (Top to bottom) like in this image
Whats the best way to achieve this with in After Effects.
Looks like it was probably made with Trapcode Particular/Starglow. But if you don't have those plugins, you could use CC Particle World, directional blurs and glow to recreate that. Probably multiple layers of different varatioins of those effects to create that effect.
"I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work."
---THOMAS EDISON on inventing the light bulb.