How to get seperated polyline segment in selected polyline

[MarkJamesRogolino]

Hello, everyone. Now I am making a small plugin with .NET.

I have already received a lot of help from elite members such as _gile.

I have to get seperated polyline segment in selected polyline and change color that segment.

How can I solve this problem. I think someone can help me. Thanks in advance.

I attached a sample video.

[norman.yuan]

You need to provide more details about what you intend to do: select a segment of a poly line is easy, but you cannot change a polyline’s color per segment, unless you break the polyline. So, what is the purpose of your requirement? Do you want to break the polyline into multiple ones upon user selecting segments? Or you simply want to provide a visual hint to show which segment is selected so that user knows the following operation from your code would depend on the selected segment?

[MarkJamesRogolino]

Hi, norman. Thanks for your reply. I mean only visual hint. I hope your help. 

[norman.yuan]

I wrote some code published in my blog with companion video clip here:

https://drive-cad-with-code.blogspot.com/2022/09/selecting-segment-of-polyline-visually.html 

It may not be exactly what you want, but should clearly show a quite simple way to do it.

[MarkJamesRogolino · Accepted solution]

Hi, norman, Thanks for your hint. This was very helpful. Thanks again.