Model Can't Wear the Texture

Hello.I am working on a project.And i made a model for my project with Solidworks then i converted it by using Meshlab.When i am trying to add texture to my model,it cant wear the texture.But its color is changing when i try to add texture to it.Here is the SS of it;

I tried to add the texture below the scene btw.Model is the cylinder.

 

since its cad model, it probably doesn't have good or any UV map..

maybe meshlab can do some basic mapping
https://stackoverflow.com/questions/14740662/texture-mapping-using-meshlab

or otherwise need to use blender or other 3D tools to fix it.

could do test by adding this script to the object, does texture show then? (although wouldnt be proper still)
https://docs.unity3d.com/ScriptReference/Mesh-uv.html

 

Did the first way and it worked thank you very much.